[Z06] Go fast gear ratios
Thread Starter
Racer
Joined: Jul 2019
Posts: 318
Likes: 29
Go fast gear ratios
What are the advantages and disadvantages of a 410 rear end vs a 390? I know the 410 will make your car quicker but how much more compared to the 390? How much does it affect driveability in town and on the highway?
Safety Car
Joined: Feb 2013
Posts: 4,346
Likes: 755
From: Greensboro Nc
I have 4.10’s in my rx7 which has the same trans ratios as a base c5. I would imagine 4.10’s with an m12 would be pretty short, but not unbearable.
Really depends on your power level, and future goals though. For a stock displacement NA car 4.10’s would be fine. If a blower is in your future then 3.42’s might be better than either.
Really depends on your power level, and future goals though. For a stock displacement NA car 4.10’s would be fine. If a blower is in your future then 3.42’s might be better than either.
Thread Starter
Racer
Joined: Jul 2019
Posts: 318
Likes: 29
Race Director
Joined: Jan 2000
Posts: 10,263
Likes: 3,315
From: Central TX
C5 of Year Finalist (appearance mods) 2019
My C5Z has around 450whp and 3,90 cogs. It would be interesting to drive a similar car, with 4.10's, though I'm not sure anything lower than a 3.90 is needed.
Le Mans Master
Joined: Jul 2011
Posts: 7,404
Likes: 951
From: Morristown New Jersey
Oldtimer
This calculator allows you to see what your approximate speed will be in a certain gear/rpm/axle ratio. Put in the correct info first, and it will be accurate.
http://www.tremec.com/calculadora.php
http://www.tremec.com/calculadora.php
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Pro
Joined: Dec 2015
Posts: 660
Likes: 181
From: Knoxville TN
There’s not a huge difference between the 3.90’s and 4.10’s, I’ve ran the m12 trans with stock 3.42, 3.73, 3.90 and 4.10’s, if you cruise a lot on the interstate around 80+ then would choose the 3.90 but I love my 4.10’s 
Thread Starter
Racer
Joined: Jul 2019
Posts: 318
Likes: 29
I might take an occasional road trip but most of my driving is around town. 3.90s sound like they might be a good compromise.
Thread Starter
Racer
Joined: Jul 2019
Posts: 318
Likes: 29
O-70 is more my fun zone. I can't afford to get a ticket going 90. These cars get to 90 really fast rowing through the gears. My neighbor has a ZL1 I need to ask him where he goes!
Thread Starter
Racer
Joined: Jul 2019
Posts: 318
Likes: 29
Thread Starter
Racer
Joined: Jul 2019
Posts: 318
Likes: 29