Hanks URQ 2.6L Autopsy

[Audilard]

Didn't even get the shop dust off it yet.... Sounds like a chainsaw on power.... I've grown to know that is a bad sign...

I guess going to the dyno anytime soon is out of the question.

[Hank]

I will go down and tune your car if you want darin. I need a trans before I can move forward.... Literally

[sepp]

I need a trans before I can move forward.... Literally

:(

[Hank]

Scotty sent me this picture midway through the week and said the trans will ship out on Monday!!! I am super excited for a fancy high bias rear diff and a front torsen to put the power down!! I have been researching swapping Nissan rear diffs into the URQ is an attempt to come up with an clutch LSD, but I think I am goign to start looking for a torsen to swap into a rear diff and have it ready for track days only.

[Mcstiff]

I still can't help but wonder about performance RWD diffs. One of these must be up to the task:

Audi V8
Alfa Romeo: 155 Q4, 164 Q4
Citroën BX 4x4 with ABS (same as Peugeot 405 4x4)
Ford Ranger FX4 2002 only, Ranger FX4 Level II 2003-2008
Honda S2000
Humvee
Hyundai Genesis Coupe
Lancia Delta Integrale
Lexus IS200/IS300, Lexus IS F, Lexus LFA
Maserati Biturbo
Mazda: Miata/MX-5 (option on 94-05 manual models), RX-7, RX-8
Peugeot 405 4x4 with ABS (same as Citroën BX 4x4)
Peugeot 505 turbo sedan (1989 model year only)
Subaru Impreza WRX STI (2007–2011)
Toyota Celica GT-Four, Toyota Supra, Toyota Soarer, Toyota Aristo, Toyota Mark II, Toyota Chaser, Toyota Cresta, Toyota Verossa
Pontiac Firebird 4th Generation, only years 1999-2002
Chevrolet Camaro 4th Generation, only years 1999-2002
Chevrolet Camaro SS 4th Generation, option in years 1996-?
Subaru Legacy spec.B
Nissan Silvia S15 SpecR
2012 Ford Mustang Boss 302, option. Standard on Laguna Seca Edition.

Of course you can get one for a Ford 9" which comes in a million configurations. More custom starts making one from Scott more reasonable.

[Hank]

The most promising to me is that the rXXX rear differentials are available in most japanese performance cars from the old datsuns to the new STI and 350z. The r160s(160mm gear) are in lightweight cars, the 180s in cars like the STI and Maximas, and then the r200 in cars like the 300zx TT, Skylines, ect. Most of these came as open diffs or Viscous LSDs, but a few came with clutchpacks. The good thing is that the LSD's will swap into almost any generic case. This means you just need to find one with the gear ratio you want. The 200SX was a rare exception of a r200 diff that came with 4.11 gears. People have put these clutch LSD's in that diff and come up with a bullet proof diff that puts up with lsX swaps..

[speeding-g60]

from what i understand, the Skyline also comes 4.11 as that is what USP is using in their drag S4....

[Hank]

Yes, the r33 came with one, though it is a Viscous LSD. I imagine that USP welded it so it is effectively a locked like ours.

[zarati]

yeah it might look like an rs2 trans on the outside...
Have you guys seen my awesome gear ratios?

Better be able to outrun the Iroz Family. Of course, without any working Transmissions, they wont get far.

Hank, I've been pretty swamped but still watching. Sorry to hear about the Tranny but the car sounds like a beast. Cant wait to see what she does once broken in and with a new Transmission. Keep it up.

[quattro87]

Better be able to outrun the Iroz Family. Of course, without any working Transmissions, they wont get far.

Now that is funny, but the bike still runs and remember The Family is large and not just in Las Vegas.

[bradyzq]

The most promising to me is that the rXXX rear differentials are available in most japanese performance cars from the old datsuns to the new STI and 350z. The r160s(160mm gear) are in lightweight cars, the 180s in cars like the STI and Maximas, and then the r200 in cars like the 300zx TT, Skylines, ect. Most of these came as open diffs or Viscous LSDs, but a few came with clutchpacks. The good thing is that the LSD's will swap into almost any generic case. This means you just need to find one with the gear ratio you want. The 200SX was a rare exception of a r200 diff that came with 4.11 gears. People have put these clutch LSD's in that diff and come up with a bullet proof diff that puts up with lsX swaps..

They're all Fuji diffs.

The front diffs on older 4WD Datsun pickups fit the bill too. So do Q45s.

There is also the R230 out of (I'm told) the Armada.

1984-1988 200SXs came with both R180 and R200 4.11 diffs. The Turbo (and maybe V6) came with the R200, and the 4cyl NA came with the R180.

It looks like you've already been there, but hybridz.org is your friend for this kind of stuff.

[Hank]

Thanks Brady. Isn't the rear diff in the q45 a vlsd?

The turbo 200sx appears to be the winner if I do go that route. I need to make sure the clutch packs are readily available and that they will handle 600wtq in reasonable service intervals.

The wavetrac diff is Spendy at 1300$ but a mechanical diff that doesn't go open when a tire lifts sounds nice! I wish they locked on decel as well but I suppose it is a tradeoff.

[Hank]

Here is a picture of hte last narrow 01e that was in my URQ before I went to the 6 speed. This was a low mile narrow that sounded great the day I put it in. It lasted about 1500 miles of abuse and road racing at the track before the 1-2 collar went. This just gives an idea as to why the wide 1st is prefered for high hp cars being launched in 1st...

[amd is the best]

My 6 speed's looked just like that. Made a lot of noise in first, lol.

[scottmandu]

Wide first gears will do that to.

[Hank]

Thats no good Scotty! When your cryo treat, is it to help the galling?

[scottmandu]

Thats no good Scotty! When your cryo treat, is it to help the galling?

Cryo helps but there is only so much you can do with stock pieces. Jason @ AMD has had a few cars putting 700+ torque at the wheels which will destroy first gear in 3 launches or less. Generally if I hear 600+ wheel torque and hard launches on the same sentence it's time to go with an improved straight cut first gear, but then that doubles the cost of the transmission.

[savagerocco]

Hank, I have a torsen diff up in my stash if you need one......

[Hank]

Well that makes me feel warm and fuzzy Scott. I am pretty sure this engine will make 600wtq... I had better lay low in 1st

[Hank]

Torsen rear? I would love to try a torsen in the rear. I'll txt you

[loxxrider]

Hank: always willing to try something new in the rear.

[a_CQ]

I had better lay low in 1st

Move on from living quarter mile at a time and you should be fine...built 01E should be fine on the road course. And I know you're liking it better

[savagerocco]

Hank: always willing to try something new in the rear.

OH Snap!!.... lol

[Hank]

Brent, I sent you a TXT...

Peter, in my life, I have traveled a total of 2 miles down the drag strip.. Road racing is far more fun and exciting for me. I was converted long ago!! BTW, the new Porsche 996tt calipers over 2 piece rotors is the bees knees. The ol car hauls down in a hurry. My only complaint is the epic fail of having those pads with white wheels, but I am already over that!!

[Hank]

Also Scott, with the torsen front and torsen center, should I be nervous about the extra heat that it will create? Perhaps I should look into cooling the trans..

Anybody think a triple torsen drivertrain is a bad idea?