Which gears to go with on my F1-A/408 setup?
Which gears to go with on my F1-A/408 setup? Just curious what you guys reccomend. My general setup is built t56, Moser 9'' w/3.89's, F1-A procharger, 408, etc..
The car is more of a street car and I am wanting a bit longer gears so I was thinking of switching to 3.50's or 3.70's? Any input is appreciated.
Kody-
The car is more of a street car and I am wanting a bit longer gears so I was thinking of switching to 3.50's or 3.70's? Any input is appreciated.
Kody-
I would think a longer gear would be better since you're not exactly hurting for torque with the bigger cube and F-1A. If it were me, I'd switch to the 3.50s. I have 3.73's in my factory ten-bolt, and I'm considering either a taller tire or going with 3.42s as first and second gear for me is useless and third gear goes by in a blur.
I have the same rear end/gearing and I as well am looking to go down in gearing. I was looking at something in the 3.42 region with a 275/60/15 for street duty. This thing doesn't hook very well as it is.
With the tires you have I'd go with 3.70 for sure with 6600-6800rpm shift point it will be a nasty setup..
Here is my friend old Procharged Z28 3.42 gears 275/45/16 tires shifting around 6700rpm
http://www.youtube.com/watch?v=wT9Lnsqxkbo
Here is my friend old Procharged Z28 3.42 gears 275/45/16 tires shifting around 6700rpm
http://www.youtube.com/watch?v=wT9Lnsqxkbo
Trending Topics
Staging Lane
Joined: Sep 2009
Posts: 99
Likes: 0
From: Corpus Christi
Do u track race it, street race it from a dig, or want to roll race it. Each one might need different gears. I have a D1 and have 700+ tq and it does not hook on the street with DR and 3.73's. Wish I would have gone with 3.08 gears.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Basically do you want to tame it down a bit for the street or have it optimized for the track? I went with 3.73 with a 28" tire for my 402/F1A setup. I don't expect it to hook at all on the street but that gearing and tire should put me right at the top of 4th in the 1/4 with a 6 speed. Looking back on it I don't know if the car will ever see the track with the t56 so I probably should have had a 4l80e in mind when I picked the gearing but the same concept. There are gearing calculators online that you can enter in your transmission, tire, rear gearing ect and it will show you the speed and rpm for each gear. Figure out about how fast it should trap and gear it so you are close but not over your limiter. Getting it to actually hook on the street or track will probably take some effort. I don't expect to ever get mine to hook on the street with a drag radial. I just don't like the idea of gearing it wrong to make it not spin. Kinda like reducing the power so you don't spin. On the street a less powerful car that hooks could easly outrun a way more powerful one that's spinning. The more powerful car needs to figure out how to get more traction. Just my way of thinking and I have the 1/4 in mind not so much street driving so my thinking might not matter to you. Looking at some gearing calculations might help though.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Ive a 3.27 rear on my car with 255/40x17 tyres.
Generally it works very well. Although it does leave 6th gear a bit tall. 3.55 is better but leaves 4th gear a bit short when racing.
Isnt anything in between for the 8.8" axle though
Id think anywhere around 3.42 would be good though. Certainly nothing shorter than that.
Generally it works very well. Although it does leave 6th gear a bit tall. 3.55 is better but leaves 4th gear a bit short when racing.
Isnt anything in between for the 8.8" axle though
Id think anywhere around 3.42 would be good though. Certainly nothing shorter than that.
On The Tree
Joined: Apr 2012
Posts: 110
Likes: 1
From: Dalton, GA
I know this is an old thread, but I am in the same boat as the op and didn't want to star a new thread. 408/F1-A, 12psi, T56, 9", and unsure of what gear to use. It will see the track maybe once, and might see some digs on the street. It will be 95% roll raced. And almost daily driven. Any gear recommendations? Thanks. And sorry for the tread jack. 
I know this is an old thread, but I am in the same boat as the op and didn't want to star a new thread. 408/F1-A, 12psi, T56, 9", and unsure of what gear to use. It will see the track maybe once, and might see some digs on the street. It will be 95% roll raced. And almost daily driven. Any gear recommendations? Thanks. And sorry for the tread jack.
3.70 gears are what I used with my 408/F-1A. Here is a video of it. Bob
__________________
ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
I know this is an old thread, but I am in the same boat as the op and didn't want to star a new thread. 408/F1-A, 12psi, T56, 9", and unsure of what gear to use. It will see the track maybe once, and might see some digs on the street. It will be 95% roll raced. And almost daily driven. Any gear recommendations? Thanks. And sorry for the tread jack.
You're welcome. Thanks. Bob
__________________
ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
