best GEARS for my 9 inch with a t76gts !?!?
03-11-2006, 10:44 PM
#1
10 Second Club
Thread Starter
iTrader: (38)
Join Date: Jan 2005
Location: Fresno, CA
Posts: 1,411
Likes: 0
Received 0 Likes
on
0 Posts
best GEARS for my 9 inch with a t76gts !?!? ok i looked and read all the threads alot of them were for autos!
i have a 6 speed with 4.11s curently! grrrrrrr(more money i have to spend)
i would like to know what would be a good gear i saw alot of people saying
there are so many gears for the 9 inch i have a stange center section with 31 spline axles what all do i need to??
3.42s
3.23s
2.91:1 i think for a 9 inch
3.50:1
i have my heads ported and polished to flow 270 and my cam is 218 214 564 546 on a 115 lsa with 5 degress advance what do you all think would be my best bet!?!?
i have a 6 speed with 4.11s curently! grrrrrrr(more money i have to spend)
i would like to know what would be a good gear i saw alot of people saying
there are so many gears for the 9 inch i have a stange center section with 31 spline axles what all do i need to??
3.42s
3.23s
2.91:1 i think for a 9 inch
3.50:1
i have my heads ported and polished to flow 270 and my cam is 218 214 564 546 on a 115 lsa with 5 degress advance what do you all think would be my best bet!?!?
Last edited by TondSS; 03-11-2006 at 10:57 PM.
03-12-2006, 01:09 AM
#2
FormerVendor
Take your target power and weight, convert it to estimated trap speed.
Now take your estimated trap speed and plot it against max RPM and tire height to figure out necessary gearing.
I run a 3.25 gear. If you're planning on maxing out that T76, you'll probably want a 3.25-3.55 gear depending on the tire you are planning to run.
Now take your estimated trap speed and plot it against max RPM and tire height to figure out necessary gearing.
I run a 3.25 gear. If you're planning on maxing out that T76, you'll probably want a 3.25-3.55 gear depending on the tire you are planning to run.
03-12-2006, 06:51 PM
#4
10 Second Club
Thread Starter
iTrader: (38)
Join Date: Jan 2005
Location: Fresno, CA
Posts: 1,411
Likes: 0
Received 0 Likes
on
0 Posts
my mechanic wants to wait to see how much power i will have and the weigh it looks on the sheet to determain what gears also however we were thinking of 3.55s right off the bat!
03-16-2006, 11:21 AM
#5
11 Second Club
iTrader: (2)
Join Date: Dec 2003
Location: Montgomery, AL.
Posts: 535
Likes: 0
Received 0 Likes
on
0 Posts
I would definetly go with a 3.23 using a 28-in tall slick as torque should not be a problem at all and the low gear will "settle" the car down when it leaves. There are some of my Buick and Mustang brethren including myself that have been using less gear and finding trap speed and ET. Just take a look at the GN in last months issue of GM HIGH-TECH PEFORMANCE. He is running a 3.23 gear with a 28-in tall slick and running 9's with allot less C.I.D than you will have. I don't think you will be dissappointed at all with a numerically lower gear such as the 3.23. Plus turbos like to be "loaded" as it were, that is when they trully make power.
Jim C.
Jim C.
03-16-2006, 12:00 PM
#6
6 Second Club Moderator
iTrader: (7)
Join Date: Sep 2002
Location: Lombard .IL
Posts: 3,682
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by INTMD8
Take your target power and weight, convert it to estimated trap speed.
Now take your estimated trap speed and plot it against max RPM and tire height to figure out necessary gearing.
I run a 3.25 gear. If you're planning on maxing out that T76, you'll probably want a 3.25-3.55 gear depending on the tire you are planning to run.
Now take your estimated trap speed and plot it against max RPM and tire height to figure out necessary gearing.
I run a 3.25 gear. If you're planning on maxing out that T76, you'll probably want a 3.25-3.55 gear depending on the tire you are planning to run.
Trending Topics
03-17-2006, 11:18 AM
#8
TECH Senior Member
Join Date: Nov 2001
Posts: 10,341
Likes: 0
Received 0 Likes
on
0 Posts
you are a six speed right? I would go no taller than a 3.50 gear if you are running a 26 inch tire and if a 28 I would go 3.73. six speeds dont have the torque multiplication that the autos have so gearing is a little more important (comparitively)