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Thoughts on gear ratio....
#450578
08/26/09 12:54 PM
08/26/09 12:54 PM
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Las Vegas
Al_Alguire
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Ok since this is something that seems to get some attention here let me post my stuff and see what you guys think. My car is down now for some maintenance and improvements, one of the things I am considering is a gear swap.
Here is the currect situation, sorry this may get winded but may help some come to a conclusion. I am currently running a 4.30 gear with a 15x33" Goodyear slick. On the odd occasion I run the car all out these days I cross the traps at 7500rpm. Sounds all well and good until you consider my engine makes peak HP at 7600. When I am on the stop the trap RPM is a tad less. As an indication of how the car reacts to more RPM when I run the car all out and shift at 7600 the car runs .3 slower than when we shift at 8300. The trap RPM of 7500 is from when we shift at 8300.
So with that little bit of backround my question is what should I do, or better yet what would YOU do?. I can leave it as is, I figure it is a bit less wear and tear on things with the lower RPM. It works very well as it is, but I KNOW I am giving up ET and MPH on the stop. The car is just really starting move about 1100' downtrack all out, on the stop it is starting to pull hard just before the lites. So given the parametrs what gear if any would you go to if any a 4.56 or a 4.88? With more gear I could improve my aenemic 60' times as well. The car has been in the 1.teens a couple of times but usually is a low 1.20 car. One more little tid bit that I have heard from a few different folks running all out is this comment. Man your car really starts to move about 4-500'out, which is true. The timeslips confirm, my 1/8 mile stats are not really on par with my 1/4 mile numbers.
So what do you all think..Looking forward to hearing your thoughts on all this.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Thoughts on gear ratio....
[Re: Al_Alguire]
#450580
08/26/09 12:59 PM
08/26/09 12:59 PM
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Renton Washington
Triple Threat
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Al, You don't really seem like the kinda guy to leave that ET on the table. You paid for all those ponies, might as well put the gear in to use them.
Especially if you are going to be racing the car on the stop more regularly, I would go to a lower gear.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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Re: Thoughts on gear ratio....
[Re: Al_Alguire]
#450582
08/26/09 01:14 PM
08/26/09 01:14 PM
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On the south side of Nowhere
S/ST 3040
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It looks like your converter is slipping a whopping 4% with that gear.  4.88s will put you about 8600 RPM.....figuring you pick up to 166 MPH. 4.56s will put you about 8030 RPM at the same 166 MPH. Also with a lower gear, it may not need the 8300 shift for best ET either.
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Re: Thoughts on gear ratio....
[Re: Chassisman]
#450586
08/26/09 04:27 PM
08/26/09 04:27 PM
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Joined: Jan 2003
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The Swamp
MegaDart
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Quote:
Wayne, don't you run methanol?
yes, both my rides have alky carb
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Re: Thoughts on gear ratio....
[Re: MegaDart]
#450587
08/26/09 04:43 PM
08/26/09 04:43 PM
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Rock Springs
Bob_Coomer
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Quote:
I would not want to spin any bb 8000rpm+ on any pass, but that is just me. I need my stuff to live a long happy life!
Your car and my old 555ci Dart combo are nearly indentical in weight hp, and et/mph. I ran the same tire also and with 456gear I was hitting 7800 and I wasn't to0 happy with that so I changed to to 4.30.
Have you got the chassis straightened out so you can run consistantly off the stop??
My advise, like anything else you just need to test. My new car responded well to 4.30 gear from 4.10. With the 555ci it went `1.18-1.19 and gear change netted 1.134 in nasty racing conditions. Big motor is now in and should go 1.0x pretty easy, that is with big 34.5 tire and beadlock as well.
I always wanted to try the M5 alky, a guy at the track was running it, and we had a conversation about it. He picked up a good amount of power switching over. He said when he first made the switch, he seen NO gains, but after he found out his tune was now way off with the new fuel, it picked up a good bit.
If i had a set of 4.56's i would give them a try anyways, it wont hurt, and Im betting it wont be very hard to do the swap with your setup... 
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Thoughts on gear ratio....
[Re: Al_Alguire]
#450588
08/26/09 04:54 PM
08/26/09 04:54 PM
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Joined: Jun 2003
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Romeo MI
MR_P_BODY
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I'd go with the 4.56, it would pull a little harder coming off the stop and it wouldnt be ringing it too much and still leave you room if you werent on the stop 
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Re: Thoughts on gear ratio....
[Re: Chassisman]
#450590
08/26/09 05:10 PM
08/26/09 05:10 PM
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Joined: Jul 2003
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Colorado
506RR
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Quote:
4.56.........final answer. 
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Re: Thoughts on gear ratio....
[Re: Al_Alguire]
#450591
08/26/09 05:27 PM
08/26/09 05:27 PM
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Orange County, Ca.
B1CUDA
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4.56 is what I had in my Cuda when your motor was in it. P.S. Those exact gears (Richmond Pro 4.56 Ring & Pinion) are sitting in a box, about 10 feet from me. Say the words and they will be on there way to you...... (Technicnally they are a 4.57.....Part#79-0080-1)
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Re: Thoughts on gear ratio....
[Re: MegaDart]
#450592
08/26/09 05:43 PM
08/26/09 05:43 PM
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communist bloc of new jersey
jamesc
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Quote:
I would not want to spin any bb 8000rpm+ on any pass, but that is just me.
no it isn't just you. i'm no crack engine builder and i know a properly sorted engine will make HP up there but i just don't think it's a good idea. i don't recall what his combo is (guessing 4.5 stroke?) but one would have to think the piston speed is up there pretty good at 8300. iirc this engine was done by a high end builder but still for a bracket type (that is what it is) car imho that's just too fast. SS/comp type engines that are looking for every last hundredth and get torn down frequently is one thing. it sounds like the engine was specd to turn that fast but i think it's hard on parts especially when you're just slowing it with the stop anyhow. it sounds like performance wise it would react favorably to the 456 but again it is a bracket car. i'm assuming this has a 1.80 gearset?
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Re: Thoughts on gear ratio....
[Re: B1CUDA]
#450596
08/26/09 07:52 PM
08/26/09 07:52 PM
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Joined: Dec 2006
Posts: 3,667
Arizona
Chris'sBarracuda
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Quote:
4.56 is what I had in my Cuda when your motor was in it.
P.S. Those exact gears (Richmond Pro 4.56 Ring & Pinion) are sitting in a box, about 10 feet from me. Say the words and they will be on there way to you......
(Technicnally they are a 4.57.....Part#79-0080-1)
 
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Re: Thoughts on gear ratio....
[Re: jamesc]
#450597
08/26/09 08:17 PM
08/26/09 08:17 PM
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Las Vegas
Al_Alguire
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Well James the car is used in S/ST and seems to work really well that way. We have done ok to this point running it this way. On the stop the car is pretty lazy but still runs a fairly big MPH in S/ST trim. It does have a 1.80 gearset PG. As for it not doing well it has done me well so far this year with a limited amount of testing time on the stop. We did R/U at a Divisional race a few weeks ago so it must be ok right? I appreciate your input and agree with much of what you say. I guess it is my closet desire to have S/ST and T/S on my windshield at the same time  As for the engine itself. It makes well over 1000hp from 7200-8500, peak hp is pretty steady from 7500-7900, 7600 is where the highest TQ is with the 1040hp. When the pull was stopped at 8500 it was still over 1030hp. It is NOT a torque monster for sure. IMO the reason for the ET difference is shift recovery, when I shift low the RPM drops to far to keep the motor happy. IMO a gear change wouodl also have a great affect here as well. Just a matter of the time it takes to get the engine back to where it is happy and pulling hard again. Simple as that, and there is a significant difference. I also agree a looser converter would possible help but the one in it is pretty loose as it is. The engine builder and myself agree for all out it could stand to be a ton looser than it is. But hey I am a bracket guy and this one works pretty well. I dont have the info right in front of my but it is enough of a difference it affects the ET a good deal. My stroke is 4.125 so the engine likes the RPM for sure and is built to run that way. I just looked at a Data log and last time we had it hooked up for testing I was crossing the line at 7200 on the stop. Given that most of the time for the forseeable future it will be raced on the stop I am a bit reluctant to change the gearing. Although I spend 5 seconds of a 10.90 run at 4300rpm, with a gear change I would imagine that time on the stop may go even higher. I would not mind another MPH or two on the stop with the side benfit being a little quicker all out as well more than likely. I was going to go with a 4.56 gear but was fearful it would be a change that will most likely not net much gain. That was why I was considering a 4.88 instead. Figured that was enough of a chnge to see an appreciable difference. Otherwise in my mind it is not worth the effort or expense. IF I had a set of 4.56's that were here I may do it but I dont and if I am buying I was leaning towards 4.88's. My thinking was that will give me a better SLR and will most likely pick up the 60' and the cars reaction when and if I feel the need to run Gas or Comp. Chris...Remember while you ran a 4.56 gear in your Barracuda your tire is 29" tall while mine is 33" tall, a BIG difference. Keep it coming guys I am listening. 
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Thoughts on gear ratio....
[Re: rickstershemi]
#450599
08/26/09 08:29 PM
08/26/09 08:29 PM
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Al_Alguire
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6400....Engine builder would like it to be 7400..the brakcet race in me said whoa boy..
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Thoughts on gear ratio....
[Re: Al_Alguire]
#450601
08/26/09 08:40 PM
08/26/09 08:40 PM
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Lehigh Acres, Florida
rickstershemi
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Quote:
6400....Engine builder would like it to be 7400..the bracket racer in me said whoa boy..
I think he may be correct...especially with your transferring some weight towards the front and the suspension tuned for the changes....seems like it would pick up mph too with the 4.30 and 33" tire...
Rickster
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Re: Thoughts on gear ratio....
[Re: rickstershemi]
#450603
08/26/09 08:48 PM
08/26/09 08:48 PM
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Al_Alguire
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Me too but that much stall IMO will not be happy with the stop. 6400 or there abouts is torque peak. As Jason said he wants it as loose as possible to make the engine run it's best. To be honest the car is faster with an old TCI converter I have that is loose as a goose and inefficient as all get out with 14% slip Problem is I build a lot of heat in the trans when I have it in there so it is on the shelf. Not much use bracket and index racing but it is faster all out. Running all out we leave with a bit of RPM On the stop it is 4000rpm. When we look at a data log on the stop it is kinda funny watching the RPM time line..Starts off gaining slowly and then starts to rapidly accelerate after about 1.5 seconds. My biggest issue is the engine is not spending a lot of time at or near Peak HP, I do relaize a looser converter would be a huge help but not sure I can make the trans live hot lapping it that way. Guess I just want my cake and eat it to. Oh yeah the car is working fine now. No driving right anymore, no issues at all now and drives like a Caddy again..We did find a rear spring that was bad and a front strut that was as well. The longer bars, correctly adjusted made a huge difference as well.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Thoughts on gear ratio....
[Re: rickstershemi]
#450605
08/26/09 09:01 PM
08/26/09 09:01 PM
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Al_Alguire
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Rick I have the same conveter in my car as well. Even sent it back for a stall change. Originally it was only stalling 5100 and the car felt like a slug. I MAY buy another converter over the winter during sale time and see what we get. The on in it shows 4%+- slip so I am very happy with it especially on the stop. FWIW I have NO issues with either engine or trans temp with the current set up. Lord knows I need to change some stop stuff, 5 seconds is WAY to long. Maybe just under 2 seconds and running S/C would be better
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Thoughts on gear ratio....
[Re: rickstershemi]
#450607
08/27/09 01:37 AM
08/27/09 01:37 AM
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Al_Alguire
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One of my other issues is the down power RPM, another issue we will work on. I feel like I have time to make a sandwich sometimes. It does give me time to think though, sometimes I wonder if I am ever gonna start moving as the slower cars get WAY out there.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Thoughts on gear ratio....
[Re: Al_Alguire]
#450608
08/27/09 06:59 AM
08/27/09 06:59 AM
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Frostbitefalls MN (Rocky&Bullw...
gregsdart
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Al, first off this is above my level, so take it for what it is worth. My stuff is making power lower, max hp at 6900 to 7000. peak torque is 5000. Stall is 6400 and that is what it likes, loose. My SLR is too high at 11.17 though. The car does like the 6400 stall over the 5600 stall setup. My converter is a nine inch core, by Lupo, don't have much issue with heat, but then I haven't hot lapped it in two events either. How about some extra cooling equipment for the trans, coupled with the looser converter?
I see they make a 1.98 low gear for the glide.
1.98 x 4. 3 = 8.514
1.98 x 4 .56 = 9.0288
1.8 x 4.3 = 7.74
1.8 x 4.56 = 8.208
1.8 x 4.88 = 8.784
My uneducated guess leads me to think the 1.98 x 4.56 plus loose converter and extra trans cooling would be the way to go?
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Thoughts on gear ratio....
[Re: gregsdart]
#450609
08/27/09 07:15 AM
08/27/09 07:15 AM
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Frostbitefalls MN (Rocky&Bullw...
gregsdart
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The order I would try stuff would be converter first, to see how it leaves and recovers on the shifts.
1.98 trans gear second, rear gear last.
My thought is shoot for 7000 stall, shift at 7800,trap 8000.
Last edited by gregsdart; 08/27/09 07:21 AM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Thoughts on gear ratio....
[Re: gregsdart]
#450610
08/27/09 07:24 AM
08/27/09 07:24 AM
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Arizona
Chris'sBarracuda
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Quote:
The order I would try stuff would be converter first, to see how it leaves and recovers on the shifts.
1.98 trans gear second, rear gear last.
My thought is shoot for 7000 stall, shift at 7800,trap 8000.
I see they make a 1.98 low gear for the glide.
1.98 x 4. 3 = 8.514
1.98 x 4 .56 = 9.0288
1.8 x 4.3 = 7.74
1.8 x 4.56 = 8.208
1.8 x 4.88 = 8.784
My uneducated guess leads me to think the 1.98 x 4.56 plus loose converter and extra trans cooling would be the way to go?
This is how I start.. Figure out low gear ratios first.. 
Chris..
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Re: Thoughts on gear ratio....
[Re: Chris'sBarracuda]
#450611
08/27/09 08:14 AM
08/27/09 08:14 AM
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Romeo MI
MR_P_BODY
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Quote:
Quote:
The order I would try stuff would be converter first, to see how it leaves and recovers on the shifts.
1.98 trans gear second, rear gear last.
My thought is shoot for 7000 stall, shift at 7800,trap 8000.
I see they make a 1.98 low gear for the glide.
1.98 x 4. 3 = 8.514
1.98 x 4 .56 = 9.0288
1.8 x 4.3 = 7.74
1.8 x 4.56 = 8.208
1.8 x 4.88 = 8.784
My uneducated guess leads me to think the 1.98 x 4.56 plus loose converter and extra trans cooling would be the way to go?
This is how I start.. Figure out low gear ratios first..
Chris..
I'm no glide expert but if you run a stepper low
gear dont you just end up with a greater drop/change
going into high gear
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Re: Thoughts on gear ratio....
[Re: S/ST 3040]
#450613
08/27/09 08:29 AM
08/27/09 08:29 AM
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Joined: Jun 2003
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Romeo MI
MR_P_BODY
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Quote:
Yes but, maybe that's why they said swap to looser converter first.
To me .... hes happy with the converter(to a point) but
he need the revs for it to pull hard.... in my feeble
brain I would move the torque curve by advancing the
cam, moving the TQ and HP into a lower range which
should help the shift point...... I think
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Re: Thoughts on gear ratio....
[Re: MR_P_BODY]
#450614
08/27/09 08:35 AM
08/27/09 08:35 AM
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On the south side of Nowhere
S/ST 3040
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I know he has to bracket race but, I couldn't stand it, if I knew there was ET left in the converter.  I think the extra 1000 RPM will help shift recovery without going to a lower 1st gear. I think a 6400 stall converter with 4% slip is awesome with that much power. 
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Re: Thoughts on gear ratio....
[Re: S/ST 3040]
#450616
08/27/09 08:52 AM
08/27/09 08:52 AM
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Arizona
Chris'sBarracuda
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Remember... He is trying to do this and still have the car react on a pro tree..CONSISTENTLY..  If he tries to run S/C & S/G @ 2800# and the car doesn't react,(.420 or better) he will get his butt handed to him regularly.. The rear gear will give him more dynamic hp @ the rear wheels, but it would react worse.. The car will move out of the beams quicker with a 4.30 than a 4.88 Doing what he is trying to do, the best combo is probably where he is at now, except for converter. I would put a good 9" converter in it.. Then try some different low gear sets..My car loved a 1.96 gear set for running S/G..I run a 1.76 for S/ST though. Never changing the rear gear..(except for Denver... ) So that's my.. But what do I know..  Chris..
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Re: Thoughts on gear ratio....
[Re: Al_Alguire]
#450619
08/27/09 11:45 AM
08/27/09 11:45 AM
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Joined: Jan 2003
Posts: 1,624
Orange County, Ca.
B1CUDA
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Quote:
Chris...Remember while you ran a 4.56 gear in your Barracuda your tire is 29" tall while mine is 33" tall, a BIG difference.
Sooooooooooo, you want me to send my slicks up to you as well? 
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Re: Thoughts on gear ratio....
[Re: B1CUDA]
#450620
08/27/09 01:26 PM
08/27/09 01:26 PM
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Left Coast
BobR
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Quote:
Quote:
Chris...Remember while you ran a 4.56 gear in your Barracuda your tire is 29" tall while mine is 33" tall, a BIG difference.
Sooooooooooo, you want me to send my slicks up to you as well?
Are you going to have the car in Vegas next week, Chris?
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Re: Thoughts on gear ratio....
[Re: BobR]
#450621
08/27/09 02:59 PM
08/27/09 02:59 PM
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Joined: Jan 2003
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Orange County, Ca.
B1CUDA
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Quote:
Quote:
Quote:
Chris...Remember while you ran a 4.56 gear in your Barracuda your tire is 29" tall while mine is 33" tall, a BIG difference.
Sooooooooooo, you want me to send my slicks up to you as well?
Are you going to have the car in Vegas next week, Chris?
Hi Bob! No, the pistons are not back to Jason yet. I am hoping that we will be ready for the Fontana race, but, it is out of my hands. I say that you make an executive decision, and let me drive the Mustang at the Vegas race. 
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Re: Thoughts on gear ratio....
[Re: B1CUDA]
#450622
08/27/09 09:09 PM
08/27/09 09:09 PM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
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Quote:
Quote:
Quote:
Quote:
Chris...Remember while you ran a 4.56 gear in your Barracuda your tire is 29" tall while mine is 33" tall, a BIG difference.
Sooooooooooo, you want me to send my slicks up to you as well?
Are you going to have the car in Vegas next week, Chris?
Hi Bob! No, the pistons are not back to Jason yet. I am hoping that we will be ready for the Fontana race, but, it is out of my hands. I say that you make an executive decision, and let me drive the Mustang at the Vegas race.
Uh, um, gee, I doubt very much if you could drive it...with your knees in your mouth.
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Re: Thoughts on gear ratio....
[Re: Chris'sBarracuda]
#450623
08/28/09 12:07 AM
08/28/09 12:07 AM
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Joined: Jun 2009
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ky
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Quote:
Remember...
He is trying to do this and still have the car react on a pro tree..CONSISTENTLY..
If he tries to run S/C & S/G @ 2800# and the car doesn't react,(.420 or better) he will get his butt handed to him regularly..
The rear gear will give him more dynamic hp @ the rear wheels, but it would react worse..
The car will move out of the beams quicker with a 4.30 than a 4.88
Doing what he is trying to do, the best combo is probably where he is at now, except for converter.
I would put a good 9" converter in it..
Then try some different low gear sets..My car loved a 1.96 gear set for running S/G..I run a 1.76 for S/ST though. Never changing the rear gear..(except for Denver... )
So that's my..
But what do I know..
Chris..
how much rpm drop on gear change do you get with the 1.96
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Re: Thoughts on gear ratio....
[Re: BobR]
#450624
08/28/09 12:15 AM
08/28/09 12:15 AM
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Joined: Jan 2003
Posts: 1,624
Orange County, Ca.
B1CUDA
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,624
Orange County, Ca.
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Quote:
Uh, um, gee, I doubt very much if you could drive it...with your knees in your mouth.
Heck, I would just take the booster seat out!(I would have to wear "Depends" the first couple of passes)
See you guys next week!
Chris
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Re: Thoughts on gear ratio....
[Re: rickstershemi]
#450625
08/28/09 02:07 AM
08/28/09 02:07 AM
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Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
MoparBilly
master
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master
Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
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Quote:
IMO with a higher stall "efficient" vert would lesson your time on the stop and mph higher....just throwing it out there
The 8" ati I run was built to a "blown application spec", but suggested for my combo....it is very efficient
Rickster
Rick,
I wonder if such a converter even exists...that's why Comp Eliminator guys run 3 speeds. Because High Rpm, big hp, no torque engines can quickly push the limits of available converter technology.
I'd say the one in there is certainly serviceable, not optimum, but manageable trans temp is certainly important.
Al,
I would probably err to the far side as well, and go with the 4.88. Considering the situation, I think it will make a difference.
Couple of questions... When on the stop, how soon do you shift to 2nd? What carb, and what air bleeds/ jets are you running for the stop? Have you tried a higher down power Rpm?
"Livin' in a powder keg and givin' off sparks"
4 Street cars, 5 Race engines
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Re: Thoughts on gear ratio....
[Re: B1CUDA]
#450626
08/28/09 09:27 AM
08/28/09 09:27 AM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
Quote:
Uh, um, gee, I doubt very much if you could drive it...with your knees in your mouth.
Heck, I would just take the booster seat out!(I would have to wear "Depends" the first couple of passes)
See you guys next week!
Chris
Hope Doug's not reading this. I have to see him tomorrow. Yes, see you in sin city.
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Re: Thoughts on gear ratio....
[Re: MoparBilly]
#450627
08/28/09 10:20 AM
08/28/09 10:20 AM
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Joined: Jan 2003
Posts: 19,395
Las Vegas
Al_Alguire
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 19,395
Las Vegas
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Billy,Yes we have tried higher down power RPM and it resulted in a car that was really hard to dial and I was on the stop FOREVER..6+ seconds I would like to try a disc stop instead of the blade one I have but hey those dang lottery numbers have not come in and I have not ben able to find a Superman deal at a Clark Kent price on one yet. I also talked to a few guys with big MPH cars after noticing s ome seem to have the stop work in stages. The consensus seems to be try and get the stop RPM down to 3600-3800 first. That I have notbeen able to do with what I have. The secondary side is closed and the primary side is all but closed now. We leave on the stop, let go of the button and on the stop. I shift at .50-.75 out shooting for what I think is my ideal 60' in the 1.85-1.90 range. We tried letting the car run out anywhere from .1 to .5 before coming on the stop and that made it really hard to dial adn spending way to much time on the stop as well. The carb is a Gary Williams Dominator the jets are 104-108's typically(due to fuel I run). I dont have the air bleed numbers in front of me right now. The car seems to run fine on the stop with no issue. But I am all ears if you think there is something you feel I should look at. Chris i dont think I want your tires. Not really the hot ticket for a bracket bomber But if you want me to dial in that Hemi just let me know Let me know on those 4.56's maybe I should just buy both and try them and see what happens. BobR-I run a Dana rear unfortunately. We have been thinking of going to a 9" mostly in an efort to save some weight in the car. We figure a good 9" sheet metal housing with a fw tricks may save me 50-60lbs. Really about the ponly place in the car I can cut a large amount of weight, well that and the driver
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Thoughts on gear ratio....
[Re: Al_Alguire]
#450628
08/28/09 11:43 AM
08/28/09 11:43 AM
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Joined: Jan 2003
Posts: 10,031
Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,031
Frostbitefalls MN (Rocky&Bullw...
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Al, I had good luck getting consistent even with the 11.17 slr by leaving at only 4000 against the converter. I run a dual stage throttle controller and bring it back to full throttle when I let off the button. That took enough hit out of the car to really help. Other thoughts are retard timing at various points depending on what you want to do.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Thoughts on gear ratio....
[Re: gregsdart]
#450629
08/28/09 12:33 PM
08/28/09 12:33 PM
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Joined: Jan 2003
Posts: 19,395
Las Vegas
Al_Alguire
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 19,395
Las Vegas
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Greg I really like the SLE(starting line enhancer)for full tree racing not so sure it is useful on the stop, racing the Super Classes. I dont have any issues running a full tree leaving low. I carry a a fairly big number in the box for the S/ST, .5 pro tree. I have done reasonably well on a .4 tree as well but think a little more RPM would be the answer there so I can go consistenly red and set up from there, need more for that .385 tree before I worry about a National Event level event though. Have not really worked on a .400 or .385 tree set up honestly but we are ok at the .500 tree. I am still learning this S/ST stuff hopefully one day I can be as good at it as others are on here.
I have messed around with a high gear retard and did not find a lot there, but did gain a bit. Not sure it is worth the extra possibility of having a problem with it though. We are trying to cut out as many variables as I can and stay consistent.
I really want to start a little bronze guy collection, one is just plane lonely.. I think we can have a shot at one again if I can just get the car a tad easier to dial, or should I say more predictable. The changes I am making I am hoping will accomplish that. I think getting the engine more into it's "power zone" will be a big help. I came close to adding to a collection at the last divisional with that R/U finish but that was more dumb luck than any skill on my part.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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It is his stuff, he can do what ever he wants with it 
