Need gear ratio change advice on UPP TT setup. This isnt working.

Reply Subscribe

Thread Tools

Search this Thread

03-04-2017, 07:21 AM

#21

GARY2004Z06

Le Mans Master

Member Since: Nov 2005

Location: Kendall Park NJ

Posts: 6,964

Likes: 0

Received 335 Likes on 247 Posts

Quote:

Originally Posted by stevieturbo

With that gearing you will see huge rpm drops during shifts.

Unless your car truly is a 250mph car I would see no reason to choose such gearing.

Up to you to decide though. Put the info into a gear calc and see where your shifts will leave you and where you make power etc.

Only the trans gear ratios affect rpm drop during shifts. I do agree that a gear calculator will assist in selecting the correct overall gearing based on tire height, rear and trans ratios.

Reply Like

03-04-2017, 01:05 PM

#22

stevieturbo

Melting Slicks

Member Since: Jul 2004

Location: Northern Ireland

Posts: 2,830

Likes: 27

Received 140 Likes on 125 Posts

Surprisingly even with the tall gearing it's not as bad as I thought, but you would need to be shifting beyond 7k really unless the car is pulling very hard at 5k already

Attached Images

Last edited by stevieturbo; 03-04-2017 at 01:14 PM.

Reply Like

03-07-2017, 08:40 AM

#23

Smoove

Melting Slicks

Member Since: Aug 2002

Location: East Coast fl

Posts: 3,295

Likes: 277

Received 38 Likes on 35 Posts

Just change the diff to a 2.73. You'll be fine.

Reply Like

03-08-2017, 01:09 AM

#24

Water_Walker

Burning Brakes

Member Since: Jan 2009

Posts: 1,218

Likes: 42

Received 70 Likes on 45 Posts

Bump I think this thread is interesting.

What do you think about doing 3.15's in a 600rwhp 02z? Entirely a street driven car.

Reply Like

03-08-2017, 08:46 AM

#25

Smoove

Melting Slicks

Member Since: Aug 2002

Location: East Coast fl

Posts: 3,295

Likes: 277

Received 38 Likes on 35 Posts

Quote:

Originally Posted by Water_Walker

Bump I think this thread is interesting.

What do you think about doing 3.15's in a 600rwhp 02z? Entirely a street driven car.

Blower or turbo?

Turbo(s) would like it more.

Reply Like

03-08-2017, 10:57 AM

#26

StuntHeavy

Racer

Member Since: Nov 2013

Location: Houston Texas

Posts: 254

Likes: 2

Received 6 Likes on 6 Posts

Where are you guys sourcing gears from?

I've got an F1R procharge car. It'll probably never see the 1/4 mile. It's really just a street toy. But one day i'd like to do the texas mile. M12 trans kinda kills it, but my budget isn't endless and a tr6060 isn't really in the cards right now. Maybe 3.15 would work out for me.

Reply Like

03-09-2017, 10:59 PM

#27

Water_Walker

Burning Brakes

Member Since: Jan 2009

Posts: 1,218

Likes: 42

Received 70 Likes on 45 Posts

Quote:

Originally Posted by Smoove

Blower or turbo?

Turbo(s) would like it more.

Supercharger. Ti Trim if it helps (A&A). Big cam (too big), but what I have to work with.

Reply Like

03-10-2017, 06:25 PM

#28

BlackMagicC5

Melting Slicks

Thread Starter

Member Since: Aug 2003

Posts: 3,306

Likes: 8

Received 5 Likes on 4 Posts

Quote:

Originally Posted by Water_Walker

Bump I think this thread is interesting.

What do you think about doing 3.15's in a 600rwhp 02z? Entirely a street driven car.

I was going to do 3.15 when I had 650rwhp but before I got a chance the motor is hurt. So now going for 2.73 cause Ill be making 750+.

Reply Like

03-10-2017, 06:27 PM

#29

BlackMagicC5

Melting Slicks

Thread Starter

Member Since: Aug 2003

Posts: 3,306

Likes: 8

Received 5 Likes on 4 Posts

Quote:

Originally Posted by StuntHeavy

My current 3.73 rear is rpm level 4. So Im sending it back to them to change it to 2.73. They quoted me $399 for parts and $350 for labor with approximately 2 week turn around.

Reply Like