Torsen limited slip? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

madmax13 · 10-17-2013, 01:24 PM

Does anyone have any information about the new limited slip and the specific improvements over the current stock unit? I am thinking about it for my 1LE.

Thanks

Bhobbs · 10-17-2013, 01:47 PM

GM said they gained .7 seconds around MRC by changing to the helical LSD.

Zfatuated · 10-17-2013, 01:59 PM

Quote:

Originally Posted by Bhobbs

GM said they gained .7 seconds around MRC by changing to the helical LSD.

...combined with ABS based line-shaping and traction control, which he won't be retrofitting :-)

From a time/trouble/expense standpoint, Madmax would be far better served investing instead in a high-quality performance driving school experience.

woodside783 · 10-17-2013, 02:32 PM

Come on gm performance

blazzin1 · 10-17-2013, 03:38 PM

Looks almost identical to the Eaton True-Trac that I just installed....

Forty5th · 10-17-2013, 04:28 PM

It's a pretty robust differential. Ford uses it on the Boss 302 (optional on non laguna Seca and standard on the Laguna Seca models).

http://forums.corvetteforum.com/othe...ferential.html

http://www.torsen.com/files/Ford%20M...2%20Torsen.pdf

JusticePete · 10-18-2013, 08:59 PM

.7 seconds is 14 seconds in a 20 lap session!

For a Z/28 with 305 Trofeos all round you need a stronger differential or you will be doing one wheel peels as you accelerate through the corners. On a damp Ring the Z/28 pulled 1.8 Gs in some corners. That puts a huge load on the differential. Keep in mind, the .7 seconds is a comparison of two fresh differentials. Put a season or two of track time on both differentials and run the back to back test. The difference will be greater than .7 seconds.

LOWDOWN · 10-18-2013, 09:08 PM

Torsen was optional on Gen-4 Firehawks. We used one very effectively in the 500+ hp supercharged "Firehawk Lite" that finished 2nd Overall in the '98 One Lap of America.

OldScoolCamaro · 10-18-2013, 09:52 PM

...lotsa worm gears in that unit......modern science! With an old school application. Gotta love the power of thought, engineering, and application of same.

madmax13 · 10-19-2013, 10:36 PM

Quote:

Originally Posted by Zfatuated

...combined with ABS based line-shaping and traction control, which he won't be retrofitting :-)

From a time/trouble/expense standpoint, Madmax would be far better served investing instead in a high-quality performance driving school experience.

True that! I've been to Bondurant once, looking to go back soon! Especially now that they have 1LEs! I was going to drive mine out there but heck I'll roast their tires!

Max

madmax13 · 10-19-2013, 10:44 PM

Quote:

Originally Posted by JusticePete

.7 seconds is 14 seconds in a 20 lap session!

For a Z/28 with 305 Trofeos all round you need a stronger differential or you will be doing one wheel peels as you accelerate through the corners. On a damp Ring the Z/28 pulled 1.8 Gs in some corners. That puts a huge load on the differential. Keep in mind, the .7 seconds is a comparison of two fresh differentials. Put a season or two of track time on both differentials and run the back to back test. The difference will be greater than .7 seconds.

That's a lot of time! 1.8 Gs is pretty crazy. Do the diffs break in? Very interesting.

Firefighter · 10-21-2013, 08:23 AM

I've been using a Torsen which was an SLP pull out in an S10 for 10 years or so. It was an excellent decision. I plan to upgrade to the TruTrac as it most likely will be cheaper than what GM will sell that Torsen for. They are so similar they might as well be the same.

j-rho · 10-28-2013, 12:15 AM

Does the Z28 Torsen unit have a means for initial preload? One place helical differentials like the Torsen suffer in comparison to clutch-types is in heavily loaded highly dynamic situations, like autocross. They need a fair amount of grip on the inside rear for the mechanism to work, otherwise it becomes a 1-wheel peel.
GM equips their Corvettes (don't have any Camaro5 experience) with the best clutch-type diff setups of any OEM, curious to know the reasoning.

Synner · 10-28-2013, 03:23 AM

My only concern is that it recommends non-synthetic oil and there's a lot of heat buildup during a track session. I bought a spare case to build up a rear but I don't want to put it in until I can get the Z28 diff cover and run a cooling system for added insurance with a torsen style diff.

10-17-2013, 01:24 PM	#1
madmax13 Drives: '13 2SS/RS/1LE/NPP Join Date: Dec 2012 Location: Orlando, FL Posts: 130	Torsen limited slip? Does anyone have any information about the new limited slip and the specific improvements over the current stock unit? I am thinking about it for my 1LE. Thanks

10-17-2013, 02:32 PM	#4
woodside783 Casey Woodside Drives: a very fun car Join Date: Jun 2010 Location: Tn Posts: 1,906	Come on gm performance __________________ Instagram @caseywoodside http://youtu.be/CSc9aPh_X_w

10-17-2013, 03:38 PM	#5
blazzin1 Drives: 2010 2SS/RS R6P Join Date: Nov 2008 Location: St. Cloud, FL Posts: 4,845 View My Garage	Looks almost identical to the Eaton True-Trac that I just installed.... Attached Images Last edited by blazzin1; 10-17-2013 at 04:02 PM.

10-18-2013, 09:52 PM	#9
OldScoolCamaro Drives: Camaro's, always have, always will. Join Date: Oct 2010 Location: Home of the brave Posts: 4,851	...lotsa worm gears in that unit......modern science! With an old school application. Gotta love the power of thought, engineering, and application of same. __________________ In Scott We Trust...all others must show proof.

10-28-2013, 12:15 AM	#13
j-rho Drives: '67 Z28 Join Date: Sep 2013 Location: San Diego, CA Posts: 16	Does the Z28 Torsen unit have a means for initial preload? One place helical differentials like the Torsen suffer in comparison to clutch-types is in heavily loaded highly dynamic situations, like autocross. They need a fair amount of grip on the inside rear for the mechanism to work, otherwise it becomes a 1-wheel peel. GM equips their Corvettes (don't have any Camaro5 experience) with the best clutch-type diff setups of any OEM, curious to know the reasoning. __________________ --Jason Rhoades http://www.rhoadescamaro.com/build

10-17-2013, 01:47 PM	#2
Bhobbs Drives: 2015 SS 1LE Red Hot, 1970 Chevelle Join Date: Apr 2012 Location: Chino, CA Posts: 6,989	GM said they gained .7 seconds around MRC by changing to the helical LSD.

10-17-2013, 04:28 PM	#6
Forty5th Drives: Camaro Join Date: Mar 2013 Location: USA Posts: 542	It's a pretty robust differential. Ford uses it on the Boss 302 (optional on non laguna Seca and standard on the Laguna Seca models). http://forums.corvetteforum.com/othe...ferential.html http://www.torsen.com/files/Ford%20M...2%20Torsen.pdf

10-18-2013, 08:59 PM	#7
JusticePete Drives: Camaro Justice Join Date: Jun 2007 Location: Virginia Posts: 20,174	.7 seconds is 14 seconds in a 20 lap session! For a Z/28 with 305 Trofeos all round you need a stronger differential or you will be doing one wheel peels as you accelerate through the corners. On a damp Ring the Z/28 pulled 1.8 Gs in some corners. That puts a huge load on the differential. Keep in mind, the .7 seconds is a comparison of two fresh differentials. Put a season or two of track time on both differentials and run the back to back test. The difference will be greater than .7 seconds.

10-18-2013, 09:08 PM	#8
LOWDOWN Downright Upright Drives: Daily Join Date: Apr 2009 Location: Cruisin'... Posts: 4,145	Torsen was optional on Gen-4 Firehawks. We used one very effectively in the 500+ hp supercharged "Firehawk Lite" that finished 2nd Overall in the '98 One Lap of America.

10-21-2013, 08:23 AM	#12
Firefighter Drives: Black '13 2SS/RS/1LE w/NPP/NAV Join Date: Oct 2012 Location: Tampa by way of Miami... Posts: 4,934	I've been using a Torsen which was an SLP pull out in an S10 for 10 years or so. It was an excellent decision. I plan to upgrade to the TruTrac as it most likely will be cheaper than what GM will sell that Torsen for. They are so similar they might as well be the same.

10-28-2013, 03:23 AM	#14
Synner Drives: cars Join Date: May 2011 Location: Oversneeze Posts: 4,544	My only concern is that it recommends non-synthetic oil and there's a lot of heat buildup during a track session. I bought a spare case to build up a rear but I don't want to put it in until I can get the Z28 diff cover and run a cooling system for added insurance with a torsen style diff.