'05 differential on drag strip?

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May 21, 2014 | 08:21 AM

veloz

Thread Starter

Drifting

Joined: Nov 2012

Posts: 1,782

Likes: 42

'05 differential on drag strip?

i have z51 M6 '05...is there any way to tell if my differential has been replaced with a biffier one?

Im thinking about installing drag radials and have heard that the '05 differentials are weak and cant take the abuse of drag radials...

any thoughts or experiences???

May 21, 2014 | 08:38 AM

tennblkc6

Melting Slicks

Joined: Nov 2013

Posts: 2,587

Likes: 69

From: Memphis Tn

i'm interested in this too...however, i will be on street tires and mine is an auto.

May 21, 2014 | 11:55 AM

LD85

Race Director

Joined: Feb 1999

Posts: 12,772

Likes: 17

From: Indianapolis IN

http://www.rpmtransmissions.com/page6.html

May 21, 2014 | 11:55 AM

Orange05_C6

Racer

Joined: Apr 2012

Posts: 290

Likes: 4

I've got a 05 z51 m too. I am also worried about my diff. I dont race or drag but I'm a young guy with a vette haha I'd like to put a supercharger on it but I'm afraid of the big boom in the back...

May 21, 2014 | 11:58 AM

Orange05_C6

Racer

Joined: Apr 2012

Posts: 290

Likes: 4

Quote:

Originally Posted by LD85

http://www.rpmtransmissions.com/page6.html

$5500 for a better diff!!

I'd rather not...

May 21, 2014 | 12:00 PM

615C6

Racer

Joined: Dec 2013

Posts: 258

Likes: 2

From: RACELAND LA

Quote:

Originally Posted by Orange05_C6

$5500 for a better diff!!

I'd rather not...

You have to pay to play!

May 21, 2014 | 12:26 PM

Orange05_C6

Racer

Joined: Apr 2012

Posts: 290

Likes: 4

Quote:

Originally Posted by 615C6

You have to pay to play!

I race quads, I fully understand the pay to play Haha I could buy a pritty decent new economy car for the amount I have in quads

but $6k for my car I barely have time to drive, I'll save it to add to my C7 down payment hahaha

May 21, 2014 | 12:30 PM

dennis50nj

Race Director

Joined: Mar 2005

Posts: 11,549

Likes: 27

From: Southampton NJ

Wheel hop is what kills them, drag radials helps absorb the shock from wheel hop, also better shocks helps stop wheel hop, you can do a c5 diff swap, or get an adapter to put a second generation diff in the automatic, the manual is cheaper to do, I had about 400 passes and no problems, I let someone drive a pass and didn't let out when it wheel hoped and cracked the case but that was with a lot of 1.4 60 fts

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May 21, 2014 | 12:56 PM

veloz

Thread Starter

Drifting

Joined: Nov 2012

Posts: 1,782

Likes: 42

Quote:

Originally Posted by dennis50nj

you have 400 passes on what? oem differential?

hmmm, interesting,,,i have experienced wheel hop one time..it was with the Trac Ctr off..had a lot of spinning...i switched to Trac on when launching and havent had it again...

would solid trans mounts help save the oem differential? or make it worst?

May 21, 2014 | 01:15 PM

#10

dennis50nj

Race Director

Joined: Mar 2005

Posts: 11,549

Likes: 27

From: Southampton NJ

Quote:

Originally Posted by veloz

yes the oem stock dif case with 373 gears but had about 200 on the stock 315 gears, the car went 10.62 with bolt/ons with that dif, now i have the second generation dif with those same 373 gears and dif just a different case. the runflats are hard on the case get a pair of qa1 double adjustable shocks, I have been 1.34 60 fts on soft launch with this setup NA 10.16 132 mph, have run nitrous on the street racing. still holding and I have the stock mounts no brace, dont do dry burnouts.

May 21, 2014 | 01:24 PM

#11

veloz

Thread Starter

Drifting

Joined: Nov 2012

Posts: 1,782

Likes: 42

Quote:

Originally Posted by dennis50nj

wow,,yeah remember reading your other posts about when you blew it out on your 302nd pass..!! at 5,500 rpm!! crap!!!,,that's a launch..

im just barely getting into the drag strip excitement...just for fun..this is my DD -street tires, cam and full exhaust plus a dyno.. i take it to the local 1/8 track and do 2-3 passes per week..not trying to beat anybody,,just have fun... i dont do burn outs...just a small min burnout to clean them right before a line up...i leave at 1700 rpm with Trac on and shift right a 6000rpm...but ive spinning a lot on 2nd gear and my friends rec. the drag radials,,,so that's why im asking about my oem differential and drag radials...

May 21, 2014 | 01:40 PM

#12

dennis50nj

Race Director

Joined: Mar 2005

Posts: 11,549

Likes: 27

From: Southampton NJ

Quote:

Originally Posted by veloz

that might have been JoeG, I have an automatic with a 3800 converter, I cant launch over 2000 without going up in smoke, but thats were I noticed the wheel hop more on the street just a slight dew in the air and taping the throttle it would spin and very slight hop so i quit doing that, the hop in second on the shift is bad, get the drag radials

May 21, 2014 | 03:01 PM

#13

Joe_G

Tech Contributor

Joined: Jul 2002

Posts: 14,950

Likes: 264

From: St. Louis, MO

St. Jude Donor '08

Quote:

Originally Posted by veloz

That was me, I cracked my rear in half on my 302nd launch. Good memory on the number!

Wheel hop is what kills, but even without wheel hop the number of 1.4 60 foots are limited, it's not a 12 bolt chevy or dana 60 for pete's sake.

That said, I've got 494 launches like this on my OE clutch, and I'm on my second diff, a C5 diff which is much cheaper to buy. You have to make or buy an adaptor for your cradle if you get a c5 rear. Stanger383 used to make them if you need one.

If you get drag radials (most highly recommended) and don't ever, EVER try to ride out wheel hop (let off immediately) your rear will last a while, they are not made from glass.

As Dennis said, NEVER try a burnout on street tires. I won't race on them either, it's a waste of gas.

May 21, 2014 | 03:27 PM

#14

veloz

Thread Starter

Drifting

Joined: Nov 2012

Posts: 1,782

Likes: 42

Geez that was quik!!!!was that launch on 1st gear? I didnt hear any rev limiter either. If the c5 dif can handle that thats the fix period

May 21, 2014 | 03:32 PM

#15

Joe_G

Tech Contributor

Joined: Jul 2002

Posts: 14,950

Likes: 264

From: St. Louis, MO

St. Jude Donor '08

Quote:

Originally Posted by veloz

Geez that was quik!!!!was that launch on 1st gear? I didnt hear any rev limiter either. If the c5 dif can handle that thats the fix period

You always want to launch in 1st gear. I do my burnouts in first gear too to make it easier on the clutch. And you don't want traction control on when you race, it slows you way down. And know where your rev limiter is and stay out of it, if you it it, it'll slow you down as the car pulls timing and doesn't recover right away.

Here is a great website to help you get started in drag racing. Study it all, listen to the videos, and be religious on the clutch fluid maintenance.

www.rangeracceleration.com

I've been religious with my clutch fluid and I have the OE clutch with 76,000 daily driving stop and go traffic miles and 494 launches like that. 4.10 gears help a lot in making the clutch live, it gives the clutch a longer lever to work with.

And if you decide to mod your car, this thread might help you decide where to invest your money first.

http://forums.corvetteforum.com/c6-t...ast-heads.html