GSXR 1k

My C6 is going to be a daily driver so I am looking to do the minimal mods to get the most out of my C6.

I am going to do 4:10's and I wanted to get feedback from those who are currently running them with a Z51 manual trans.

I am also looking for feedback on the "must do" mods that should be performed when I am having the gears replaced.

I want to do gears and shifter first without any other mods to get a feel for the car.

As far as my long term goals,
I will be driving this car daily until the warranty is up.
So, I am looking to do the most mods while not voiding my warranty.
I will consider a CAI and Long tube headers as long as they do not cause warranty issues.

When the warranty is up,
I will be going with a complete forced induction rebuild.

Thanks.

CBB

Can't answer your question, but my cousin just bought a GSXR 1000. (Wife wouldn't let him get the 1300) Great bike.

dennis50nj

Mardis Gras

I am going to do 4:10's and I wanted to get feedback from those who are currently running them with a Z51 manual trans.


PM Mister Big for details on 4:10's and upgrades. I feel it's worthwhile, although I haven't done mine yet.

CYA-Vett

Just visit the C5 Z06 board, same tranny and most of the racers go with 4.10's. Don't even think about 3.90's. You might want to consider a cam since your car will see higher revs most of the time, a cam will shift up the power band.

Stage7

Why do you say "don't even think about 3.90's"?

BIGGGIE

I Would think 3:90 would be a better setup..with the Z51... 4:10 and gearing in tranny will make it more like 4:30 what ever gear is next..

Joe_G

I've got a set of 3:90's bought and ready to go in. I had them in my C5 and they were probably the best mod for seat of the pants change in daily driving. The car felt like it lost 500 lbs and was a ton more responsive.

CYA-Vett

3.90's are good, 4.10's are better. Gears are like cams, no matter what size you get, you always wish you had gone a little bigger. Gears are also like cams in the sense that they all cost the same no matter what size you get.

C6Rluvur

Does anyone have 1/4 mile times after such a swap? I realize more aggressive gearing makes the car quicker, but when going that extreme ie. 3.90's -4.10's does it really add perf? or just SOTP

P-Colavette

I had 4.10's in my '99 FRC C5, then went to 3.90's and all though the car felt like it had lost some of it's zip by SOTP's it actually ran just as hard if not harder, because with a raised rev limiter, I could run thru the 1/4 mile traps in 4th gear, instead of having to shift to 5th.. this car ran VERY consistent 11.70's at 119-120 mph. When I get around to doing gears in my C6, I will probably do 3.73's or 3.90 ratio again.



Steve.

Joe_G

I also chose 3:90's to keep from having to shift to 5th in the 1/4 with my planned mods. Worked out great in my C5.

excessive81

that seems strange since the 1000 is faster then the busa??!?!?!?!? i guess girls still see the 1300 as a bigger motor not that the busa is heavy and out dated

SSJCreeper

I put 3.73's (with a few other mods) in my A4 WS-6 and it was a huge difference in SOTP. It would hit 3rd, the way it used to hit 2nd (sideways).

When I had my 4 speed '73 vette I bolted in a 4.56 set just for $hits and giggles and it rendered 1st gear useless (and top end was limited to maybe 110mph) - but OMG that car was a fun-loving, burnout machine.

I'm concerned with running 4.10's in my Z-51 that 1st gear will be rendered near to useless again... and I don't want to ruin top end too much - but I'm willing to give up 20MPH on the top if it means I could bust through the quarter-mile a half a second (or whatever) faster.

One thing to consider is... gear whine. I've been in 3 cars, all meticulously shimmed by a pro-mechanic, and all had some small trace of gear whine.

C6 Vet

I noticed he plan's on adding forced induction latter. Can some-one chime in if 4.10's would be too much gear or not!!!

SpinMonster

This isnt a corvette question but rather a race question. Yes they make every car faster and quicker....without exception. You gear with the gearset that gets you a redline at the traps. I run 6.13's on my 765rwhp/825rwtq dart which is a drag only non-street legal car that dead hooks a wheelie.....forced induction and too much gear....lol

SpinMonster

You can be a 11 second car with 4.10's or be a 12 second car with stock gears and 600rwhp. Its about as intelligent as expected when someone thinks gears handicap track performance. Get the gears AND STOP ADDING POWER WHEN YOU CAN'T GET IT TO THE GROUND ANYMORE.

Joe_G

Very well said. When I added gears to my H/C C5 I had LESS traction problems on the street - the car just went faster instead of spinning its tires all the time. I dropped about 4-5 tenths on the track 12.2-12.4 to 11.70-11.90 with the same drag radials. But I think a fair amount of that was due to me learning how to launch. I track my time slips like Ranger so these are real numbers.

And my mileage actually went up 1 mpg in my daily drive because I could skip gears and get into 6th and use it. I'm not sure I'll have the same result with a stock cammed car, but I'll be tracking it.

I also liked the road course response of the 3:90 gears - it gets out of turns faster like the car is lighter. I cannot think of one downside to getting gears, that's why it's my 2nd mod on my C6. By the way, my first set didn't make ANY noise, but I was careful about the 500 mile and multiple cool down cycle break in period.

Flareside

Same here, 3.73 or 3.90 for me. With the Z51 trans, that would put me close to the gears I had in my old C5 with a 4.10 rear. My bias is toward street performance and feel, not 1/4 mile timeslips.

bruce1

I have always run 3.73 gears in my A4, actually, I am out of gear at the finish line, the tranny shifts into 4th (overdrive) before the finish line, much to my dismay, at around 125 MPH it will shift at my set up of 6,000 rpm.

But it still is good at giving me my "Ten Second Therapy".

Bruce