Ok car makes just under 400 rwhp, its an 06 Z51 car. On MT drag radials... how hard can I launch this thing with out breaking it? stock clutch....and i am talking at a track where it will hook


I come from an F-body with a 9" in it. haha 2 step set at 6000 and side stepping the clutch....I know i cant do that.

 

Well if your going to drag race the car would'nt you set it up for that, IE: DTE diff brace, phadt poly motor & tranny mounts, or are you just trying to "impress" us "that you came from a f-body with a 9-inch in it, you forgot to tell us how much HP 800-900? if you want to drag race that f-body is probably the better car to drag with, not a world class sports car IMHO

 

My buddy has a C5 which has a remarkably weaker diff in it and he has launched at 5-6 rpm on a stock clutch with about 40-50 more horse than your pushing now. I dont think you can just side step it but you can put some pretty good abuse on it.

 

I was stating what i was use too....i did not have to worry about breaking the rear.

I got a vette for that reason i wanted more power, and it to be a better street car. but yet i am a drag racer, and lke a good car too.

C6 batmobile thanks for the info.

 

The C5 diff isnt weaker than the C6 diffs. In fact, the place where the C6 diffs break is the thickest part of a C5 diff. My diff is a C5 unit on my 2005 and I have had wheel hop with 700rwhp and it still hasnt broken. I run MT et streets on the street full time and there is no issue at all.

The number of low 9 sec c5's shows your statement to be 100% false.

My C5 had 700rwtq on a forged motor and I dropped the clutch from 5k all the time with that car. The diff never skipped a beat.

 

what you can't increase the power on the f-body?

 

yes i could have built motor in that car, but after 115000 miles things are not as nice, ride quality, nosies, window motors, stuff like that. I wanted something new, I redid that car when I got it, I was 18 and bought it for 6 grand with 8000 miles on it...it was totaled and I rebiult it. I did not want to do it again.

Plus I wanted a vette. bought vette from a forum member, and sold TA. completely differnt cars.

 

I'd pm folks who are running good and see how they are doing it. Coming out on a sticky tire trying to cut low 1.5's even a Vette sounds scary to me, sounds like breakage city.

 

You might want to do a search for CF member Ranger. He has made numerous posts regarding launching with a six speed.

A Corvette is not a car you want to dead hook, most die a from wheel hop off the line.

Good luck

 

I don't know how applicable this is given that we're talking about a manual transmission, but I'm pulling 1.4's with an automatic and 3600 stall but only launching the car at around 1300RPM. I guess the equivalent with a stick car would be ease into the clutch rather than dumping it right away.

 

Hey Spin,
What is the difference between the C5 and C6 differentials and how difficult would it be to install a C5 diff in my 05 A4?

 

I thought I read somewhere that spin had a C5 Z06 rear 100 times stronger than the C6 rear, especially the 2005 rear.

 

There is no need to replace your rear! Dennis (2005 A4) has run 10.69 with the only mods to his rear being hardened axles. Automatics are launched better from a idle taking the slack out of the converter.

 

Automatics are easier on the rear than a manual but 1.4's sound great.

 

Lots o bickering with no real answer to the OP's question. My guess is at only 400whp you will be fine, as long as you don't get any wheelhop. But every car , driver , and track is different, let us know how it goes.

 

Congrats on the C6 purchase, and good luck with your launch attempts. I'd go easy with it as it is stock (ease into it), and consider some upgrades as suggested. Spin has his nearly bullet proof, and if you have aspirations of dumping your clutch at the line, I'd consider a similar build to his.

 

Lets use Aintqik and the answer to this. Aintqik had 460rwhp and 420rwtq and went to the track on runflats. I think we can all agree that runflats are about as easy as you can get as far as stress from tires sticking at a track. His diff was built with a hardened shaft and 4.10's. He launched his car at 1100rpm, which is just off idle and he sent the diff shooting out of the back of the car dumping all the fluid on the track and fracturing the case in 3 big pieces.

He then got a C5 replacement diff which survived 760rwhp and 630rwtq from his boosted stroker until he sold the car. I got mine about a month after him. The C5 diff has a center mount that does 2 things: it rocks back and forth to absorb drive line shock while you drive and the mount for the diff requires extra reinforcment in the area the case is weakest. I have had wheel hop 1000 times and the C5 diff didnt break. I'm not saying it isnt immune to it, I'm saying it isnt fragile.

C5's have been around for a long time and the diff's in those cars have a proven record. I have seen all makes and model diffs break so when your tuner/vendor tells you its no better or worse make your decision based on this: The C5 core is 700 bucks and not 2100 bucks like the C6 core so if you do break one which would you want to have to pay for?

The C6 core is not in any way better and I sleep just fine knowing what I have in my car with 700hp and ET streets that I run 24/7.

 

In my H/C C5Z on ET Streets, I used to dead hook with a 5,500 RPM side step and cut 1.5 short times all day long. I would not even think of doing so in a C6 without a tow truck near by.