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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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Joined: Jan 2003
Posts: 19,373
Las Vegas
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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Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
rickstershemi
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Lehigh Acres, Florida
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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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Joined: Jan 2003
Posts: 19,373
Las Vegas
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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Joined: Jan 2003
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Las Vegas
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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Joined: Jan 2003
Posts: 19,373
Las Vegas
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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Joined: Jan 2003
Posts: 10,010
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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Joined: Jan 2003
Posts: 10,010
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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Joined: Dec 2006
Posts: 3,667
Arizona
Chris'sBarracuda
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Arizona
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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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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
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Posts: 52,972
Romeo MI
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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
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
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Posts: 52,972
Romeo MI
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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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Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
S/ST 3040
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On the south side of Nowhere
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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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Joined: Dec 2006
Posts: 3,667
Arizona
Chris'sBarracuda
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Arizona
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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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