camirocz

Has anyone installed 4.10 gears?Ihear they do wonders for acceleration.I dont want to modify my car just a tune,intake and thinking of gears for the spring,right now its all stock and i love it and i know that headers and catback are a waste of money unless you cam it.Just trying to be alittle quicker than the next guy while keeping drivability and getting best bang for the buck results.I will however run it all stock on stock tires just to see how low an e.t i can get .Its cold out here so may is the earliest ill get to try it.

Boomer111

I got 47 rwhp with headers and a tune.

I also have 4:10 gears.
Much more fun, more shifting and quicker wind up. I always thought the stock gears were to long.

You will lose some fuel milage especially if you have fun.

camirocz

Thanks for the reply that was nice of you.

Cdn Z06 Mike

As I understand it, there is no specific gear readily available for the Z06. I think regular C6 gears are used and then shimmed to work or else you have to get a custom pumpkin from RPM purposfully built with the 4.10's. I want gears bad but won't get them done until I can order gears built for the C6Z.

Who said headers and a cat back is a waste of money? With my headers, CAI and a tune I am at 497 rwhp through the stock mufflers and first time at the track with radials full tank of gas and kept the rear tires at 32psi I still ran 11.5 @129mph with a very soft 2.0 short. I wanted to run the car they way I run it on the street. More seast time will help that number huge. More than that and all your doing is blistering the tires most of the time. (which is half the fun)

twobit

None!!! Unless your draging.too high of RPM for day to day driving.to much shifting.gas mileage goes to shi....but The tork is exhilarating.its ok to change out the gears but i would not go so steep.just my 2 cents from a man that has been there before.

testpros

I put 4.10's in my C5 and just love um, but I think they would be to low for my C6Z. I think 3.90 would be perfect. Has anyone done that? If so how do you like them (and where did you get them)?

camirocz

Who did your tune .Since we live not too far away from each other i would appreciate if you know of a good tuner.

Mopar Jimmy

There is no specific built C6 Z rear end with 4.10s that utilize the more heavy duty C6 Z rear end pumpkin (other than maybe something RPM Transmission has put a rear end together that has been battle tested in one hard drag racer's Z I am aware of but it's very pricey-$2,995 plus shipping).

Here is the link to RPM Transmission that offer complete rear end assemblies for C6 Z06s, with the gears installed for 3.73s, 3.90 and 4.10s.

http://www.rpmtransmissions.com/differentials.html

BY far, the fastest bolt on Z on this forum (much faster than any other) in the 1/4 mile runs 4.10 gears at the track, and he's running the RPM Transmission set-up referenced in the above link. Your BIG advantage will be better 60 ft times while drag racing and better ets, but you better be running a real sticky tire at the track (at least an excellent drag radial) otherwise traction will be an issue. With street tires and 4.10s traction will be a JOKE on the street and track, but on the street sometimes that's half the fun!

I would like to do 4.10s someday also but not until they are perfected for our cars, are battle tested and proven, and come with a reasonable price tag. One forum member recently told me he had a COMPLETE nightmare of a time putting 4.10s in his 08 C6 Coupe (non Z) where the gears where made by Motive and he went through 4 sets in a short while all that failed him and cause him a lot of FRUSTRATION and $, so I will be sitting on the sidelines with the 4.10s for awhile until they evolve specifically for Zs, and are battle tested and not so expensive!

zoomz

If your racing the car the 410's will allow you to use all of 4th gear in the 1/4 mile . 4th gear is where your car makes all of its power .

Headers are not worth the money envolved unless you delete your cat's , unless 15hp is worth 2k to you.

Joe_G

These dyno sheets will explain why gears make the car feel like it's lost 500 lbs. Gears are my favorite mod.

Here is a comparative dyno sheet with a guy with same cam as mine, this was before my FAST but with 3.90 gears, he had a FAST but no 3.90 gears. Note how our cars are nearly identical.



Now, I changed the x axis to MPH vs RPM...note that at any given MPH, my geared car has about 30 more HP.



I have tracked fuel usage since new, and my car is a daily driver. The gears cut my mileage by exactly 1.0 mpg. Well worth it. Headers or a cam you only feel above 4000 rpm, you feel gears every time the car is moving. It feels 500 lbs lighter.

OliverM5

When I had a C5, my favorite mod was 3.90 gears and a lightweight aluminum flywheel. Felt like I added 100 horsepower. Here's the catch. My C5 had about 390 rwhp without the nitrous. 3.90's worked well with that kind of power.

Now, my Z06 has 640 rwhp. I wanted to add 3.90's to it as well, but realized it would be useless - my power level paired with steeper gears (than the current 3.42's) would simply spin the tires at any rpm on my nitto invos.

I'd say it you're keeping it at 500 rwhp or below on street tires, do the 3.90's. If you plan to run drag radials or slicks full time and you are above 500 rwhp, you may be able to use the gears effectively as well.

camirocz

I think gears ,cold air intake, and tune seem to be the best way to go really quickly for very cheap.These mods and a set of drag radials and the car should be in the 10s when well driven.Its cool to put gears because when the car is idling no one knows what you have .

tkr

3.90 gears in a Z with cam and twin dics light clutch will just wake the cars ability to rev much quickly thru the gears. But more important than that is the drivability with above mods is smoother and easier to live with as you cruise to work or play. The car will act more like stock when you leave a stop.

phxcobra

Problem is there aren't any drop in gears for the c6 z06

tkr

4.10 gears are more of the same but over kill for the street. And according to some of the better known shops that build them, They are a little weaker.The theory is, the more the gear ratio over 1 to 1, the more stress put on the gears themselves..I,m no expect but 3.90,s work very well in a NA Z with 550 rwhp. Remember Z gears are more delicate and need more TLC.

Mopar Jimmy

There is a substitute built for the the C6Z offered by RPM Transmission which is very strong as a hardcore drag racer on this forum who runs low 10s on slicks beats the crap out of his, so they obviously strong enough to take that abuse and hard core lauching of the car with slicks (which is going to shock the driveline of the Z alot more than regular spirited driving on the streets with ever occasional track use but its EXPENSIVE ($2995 plus your core).

Here is the RPM Link to it and its located towards the bottom:

http://www.rpmtransmissions.com/differentials.html

tkr

I agree RPM built C6Z rear units are the best there is for the ZO6. Also RPM stands behind all their products..

phxcobra

I meant just a gear set. I don't want to spend 3k+ for a new rear end. I just want some gears.

Sandman93

This MAKES TOTAL SENSE OVERALL --

00transamnh

You realize that this statement makes absolutely ZERO sense right?