T3S2000

LOL, Be carefull my wife might read this forum.

Peter

S2KPUDDYDAD

Good times

Mrsideways

Can Someone scan this article. I don't think my GRM is coming this month. NASA membership hasn't kicked in I guess.

TubeDriver

Tell me about it. I lost the 2006 WDCR SCCA AS overall season championship because I was 8/100 of a second behind a fellow competitor during the Sept event (who got a rerun due to a slow running worker ).


8/100 of a second at one event cost me the season.

alvanderp

Nevermind the fact that any issues seen in the T3 car would be exacerbated in one making as much power as Stanford's. I would have a hard time believing any torque-biasing diff would be worthwhile with his setup. Keeping the inside rear loaded in auto-x type maneuvers with the size of the tires he is running would be very difficult, and with that much power, he needs something that will give him 100% positive lock on the throttle.

Voodoo_S2K

Good article.

INTJ

What are you talking about? This is a general list and IDK about T3.

The stock torsen works very well for street and track, and less so for AX. It is very forgiving and works superbly in the rain and on on sand/light snow. The ramp up characteristics with a good fluid on the R would be a very good compromise for the vast majority of people on the list.

stantaur

Drew & I have both driven my car with the boost lowered to 14 PSI, and consensus is the thing's like a dog on a tile floor when it comes to tight sections with the torsen. Appreciate Drew for chiming in as the thread has both general and specific relevancy for folks who are considering clutch-type diffs, especially relevant north of 400 RWHP in autocross.

I had a clutch type diff (Cusco RS 1.5 way set on 100% lock) in my car for one event and the difference was impressive. Really helped put the power down earlier on corner exit and didn't seem to push. Additionally, $trelnieks and McKee both run Kaaz 1.5s in their FD RX7s; when they could just as easily buy Quaife Torsens. I'm looking forward to the OS Giken being installed in my PMR diff, since the reputation is that it will be even smoother transitioning to/from lock than the RS I had.

I didn't mind the RS for the record. It popped like the newly-freshened 12-bolt posi in my '69 Z/28 when cold, but once you were backed out of the garage / circulated some oil through the diff, it was barely noticeable. Actually had a kind of charm to it... similar to "off road use only" solid-lifter roller cams ground on 106 degree lobe separation pushing .640 lift. A little character when outside its designed envelope, but once in its element, absolutely grinworthy.

Stanford

CKit

I don't know what that means. Your car rolls around and licks its genitalia?

alvanderp

T3 is a Road Racing class with the SCCA, T3 S2000's aren't allowed much modifications over a stock car. My point was that if the OS Giken offered a few tenths on a short tight course over the stock torsen with a car that makes alot less power and runs smaller tires than Stanford's, that his car would likely see a larger discrepancy.

Autocross puts different loads on the car than road racing or street driving does. It is very easy to unload the inside rear tire enough to make the torsen light it up, especially when you are running very wide sticky tires and alot of power. I am not incinuating all torque-biasing diffs are bad, just that they would be bad for Stanford's application.