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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
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,624
Orange County, Ca.
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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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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:
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
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:
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
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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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
Posts: 877
ky
68roadrunner
super stock
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super stock
Joined: Jun 2009
Posts: 877
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: 19,373
Las Vegas
Al_Alguire
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 19,373
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: 10,010
Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,010
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: 19,373
Las Vegas
Al_Alguire
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 19,373
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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