Lets talk about Nitrous 6 speed cars and Gear and tire combos.
03-07-2012, 10:51 AM
#1
Lets talk about Nitrous 6 speed cars and Gear and tire combos. As of right now I am planning to run 4.11 gears in my 9" with a 28" tall tire and a 150 shot on a cam only LS1.
I always thought it was best to run as low a gear as possible and put as big of a tire as you could on it to increase the roll out.
I would like to run a 4.56 gear with a 29" tall tire if it will make me faster but also I dont want to spin the motor 7500 rpms to make the 1/4 in 4th gear.
This car will see more "mexico" races than anything else so I need it to work on the street.
The tires will be Bias Ply tires of course. Thinkin hoosiers on a pro star, 11.5" wide and the height will be determined by the gear im running.
What gear/ tire size would you guys run and WHY?
I always thought it was best to run as low a gear as possible and put as big of a tire as you could on it to increase the roll out.
I would like to run a 4.56 gear with a 29" tall tire if it will make me faster but also I dont want to spin the motor 7500 rpms to make the 1/4 in 4th gear.
This car will see more "mexico" races than anything else so I need it to work on the street.
The tires will be Bias Ply tires of course. Thinkin hoosiers on a pro star, 11.5" wide and the height will be determined by the gear im running.
What gear/ tire size would you guys run and WHY?
03-08-2012, 12:59 PM
#2
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WHEELSPEED accelerates the car, not engine rpm. More rear gear, gives you engine rpm and you need a good bit more of it, to increase wheelspeed
3:73-3:90 gear with a 28 inch tall tire......nitrous makes torque so let that pull you through instead of running a taller gear and a taller tire to spin the motor to the moon
then again i may be talking out of my ***
3:73-3:90 gear with a 28 inch tall tire......nitrous makes torque so let that pull you through instead of running a taller gear and a taller tire to spin the motor to the moon
then again i may be talking out of my ***
03-08-2012, 01:46 PM
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not to mention with 4.30 gears and a 28" tall tire i think you will be good to 124 mph at 6,000 rpm, you should go a bit faster than that, a 4.56 and 29" will likely be worse, and i know you don't want to spin the motor higher than that.
03-08-2012, 02:01 PM
#5
WHEELSPEED accelerates the car, not engine rpm. More rear gear, gives you engine rpm and you need a good bit more of it, to increase wheelspeed
3:73-3:90 gear with a 28 inch tall tire......nitrous makes torque so let that pull you through instead of running a taller gear and a taller tire to spin the motor to the moon
then again i may be talking out of my ***
3:73-3:90 gear with a 28 inch tall tire......nitrous makes torque so let that pull you through instead of running a taller gear and a taller tire to spin the motor to the moon
then again i may be talking out of my ***
It's like this, what would you use to get a rusty bolt off that is going to be stubborn as hell?
A short *** wrench or a long one? Same thing with longer gears and nitrous and boost.
Last edited by Fbodyjunkie06; 03-08-2012 at 02:14 PM.
03-08-2012, 02:18 PM
#7
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4.56 is a bit muchfor a 6 speed, I don't think you're gonna like that too much, especially with nitrous. I agree, go with a 3.73. I'm not sure if I remember right but I think I remember someone saying running a 4.56 on 28" tire with a 6 speed will mean finishing the 1/4 in 5th? Someone please correct me if I'm wrong though. That would be a nightmare... especially if you sprayed though 5th... kaboom.
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03-08-2012, 02:21 PM
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if your tuneup is "spot on" for the nitrous, going through the 1/4 in 4th (1:1) and you spray 5th yes it will most likely spell disater.....you can spray 5th with enough timing pulled
03-08-2012, 02:25 PM
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4.56 is a bit muchfor a 6 speed, I don't think you're gonna like that too much, especially with nitrous. I agree, go with a 3.73. I'm not sure if I remember right but I think I remember someone saying running a 4.56 on 28" tire with a 6 speed will mean finishing the 1/4 in 5th? Someone please correct me if I'm wrong though. That would be a nightmare... especially if you sprayed though 5th... kaboom.
no nitrous tho......NA
just so you can compare the tire gear selection to nitrous.
03-08-2012, 02:38 PM
#11
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Alright thanks, I couldn't remember if that was correct or not. Has a lot to do with cam selection as well. What cam are you running?
03-09-2012, 10:09 AM
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3.73, 6 speed car, 28 tires, cam only with a 150 shot... Full weight? Yeah your car will be slow. That is not a good combination. Drop the clutch at 6K and you'll have so much initial wheel speed it will blow the tires off. If it hooks (and you don't break something) it will bog the motor right down, you don't have enough power.
Fast 6 speed guys will throw the max amount of gear at it they can. Figure what mph you'll trap at and put the most gear possible in it. 4:30-4:56 is what you'll need.
Fast 6 speed guys will throw the max amount of gear at it they can. Figure what mph you'll trap at and put the most gear possible in it. 4:30-4:56 is what you'll need.
03-09-2012, 10:36 AM
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This must be a budy of yours.... Keep him as a budy but do not listen to his advise. He's way wrong on his gearing philosophy and to tell you it's ok to spray in 5th is just stupid. There are plenty of fast 6 speed guys to get proven advise from.
03-09-2012, 10:44 AM
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hmmmm you need to re-read my post and do a little more research, would i spray 5th gear no, is it ok with enough timing pulled YES people do it quite often at the texas mile, and i think you need to understand how nitrous work before you go shooting off about gearing.......in a 3,100 pound car with a cam and 150 shot+4.56 gears that will be unusable......so nitrous guru tell me why that would work.
03-09-2012, 11:01 AM
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oh I'm not here to get into a pissing match with someone that obviously doesn't know WTF there talking about.
If the OP wants to PM me and give me more information on his setup i'll be more than happy to give him some information based on lots of experiences with getting the most out of a 6 speed setup. Just don't want the poor fella spending money on a setup some yahoo gave him that will wreck his **** and slow him down.
If the OP wants to PM me and give me more information on his setup i'll be more than happy to give him some information based on lots of experiences with getting the most out of a 6 speed setup. Just don't want the poor fella spending money on a setup some yahoo gave him that will wreck his **** and slow him down.
03-09-2012, 11:06 AM
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trust me im not intending on getting into a pissing match, as far as not knowing what im talking about, well how fast have you gone? Ive been in the 8's for the most part and tuned all my own stuff to get there have you? Im just interested in understanding your philosophy on why you need that much gearing with nitrous, like i stated this does not need to turn into a pissing match, just a friendly debate if you will.