View Poll Results: Supercharger VS. Cam/heads/pistons
Voters: 22. You may not vote on this poll
[Z06] C-6 Z-06 rear end gears.
#1
6th Gear
Thread Starter
Member Since: Jan 2022
Location: Lake of the Ozarks Missouri
Posts: 6
Received 0 Likes
on
0 Posts
C-6 Z-06 rear end gears.
I am finally having some work done on my 2007 Z-06. I知 having the head issue squared away with new heads and I知 having a mild cam, new headers and an exhaust cut-out switch installed. I知 also having a new intake installed and all the bolts, fasteners, plumbing lines, and gaskets upgraded. My question is this, what rear end do I want to put it the car? Mind you it will never see a drapstrip nor racetrack, however most miles I put on it will be highway or driving around the Lake where I live to and from corvette shows. I知 thinking 3.73 or 3.90 as 3.55 isn稚 that much different than the stock 3.42痴 and 4.10 is too extreme. It already has a close ratio shifter with a ball on it. Any suggestions would be greatly appreciated! Also what does every think about LMR doing the work? I realize that they are expensive but I want it done correctly and if anyone knows a better or more inexpensive option I would gladly entertain that. Rat痴! I guess also, thoughts on a supercharger over a cam and emissions testing. Thank you all.
#2
Le Mans Master
3.90's and 4.10's are your ONLY option for the rear end unless you upgrade to a race unit which is in the $8-10K range.
The following users liked this post:
Glenn Bland (01-06-2022)
#4
All I'll add is this; the guys I've talked to say that the 3.90 diff makes 5th and 6th gear more useful, without really subtracting anything from drivability or fuel mileage. But it's not cheap. I kinda agree with keeping stock gears. If you will never see a strip or HPDE, there's really not much point in it. My .02....
The following users liked this post:
double06 (01-07-2022)
#7
Race Director
Member Since: Apr 2016
Location: Pittsburgh
Posts: 10,679
Received 4,712 Likes
on
2,998 Posts
2023 C6 of the Year Finalist - Unmodified
2022 C6 of the Year Finalist - Unmodified
2021 C6 of the Year Finalist - Unmodified
Welcome to the forum! For your type of driving, I would stay with the stock gears
#9
Le Mans Master
The following 3 users liked this post by Pb82 Ronin:
#10
Mine would hook if you rolled into the throttle and didn't floor it til after 4k. Now that it's H/C/I no chance. I would do a 3.90 if you're going to run a sticky tire at all times. If not I'd leave the stock gearing. A cammed ls7 can get out of shape in a hurry even with the stock gear on street tires
#12
I have had the 4.10's since early 2018 and it is the best mod for driving the Z, IMO. It still gets mileage way over 20 mpg, third gear is a blast, and you can now use all six gears when doing cruising on the back country roads. It was big bucks at the time, but I sure enjoy it. I don't even try, but if the shifter was bolted right to the trany like my old Z/28 was I'd be back to the original no lift shift. Honestly it really makes driving it a lot more fun. BTW the 3.90's throw the speedometer off, a fixable issue. The 4.10's ring gear is the same number of teeth as stock so no issues arise.
#13
There is no better seat of your pants bang for the buck mod than 3.90's
Do it
Do it
The following users liked this post:
Cone killer (05-02-2023)
#14
Racer
I have had the 4.10's since early 2018 and it is the best mod for driving the Z, IMO. It still gets mileage way over 20 mpg, third gear is a blast, and you can now use all six gears when doing cruising on the back country roads. It was big bucks at the time, but I sure enjoy it. I don't even try, but if the shifter was bolted right to the trany like my old Z/28 was I'd be back to the original no lift shift. Honestly it really makes driving it a lot more fun. BTW the 3.90's throw the speedometer off, a fixable issue. The 4.10's ring gear is the same number of teeth as stock so no issues arise.
#15
Burning Brakes
I致e been thinking about 3.90 gears for a few months now, but curious to hear a rough estimate on what people have paid for the swap (labor.) Anyone aware of the average cost for install?