Hey guys,
I am just finalising some of the details on my 6262 AP1 build and a bunch of people told me the rear diff would shear to pieces on the first drive. The car will see lots of track time but drag isn't in the plans. What is the weak point in the diff? The gears, the actual differential or the housing? Will a Quaiffe unit fix the issue or am I better using a solution like PuddyMod? I don't want to spend the coin for the R200 conversion if not nessescary...

Thanks!

 

While I'm there should I switch to a 3.9 or lower ratio to help manage the power? Shooting for 500whp or so.

 

its usually the pinion or the housing that grenades...and personally id go with a 4.10 gear, but then again, are the tracks youre going to be running have a lot of straights or are they more technical? and puddymod is probably your best bet, great diffs

 

Both Tremblant and Calabogie track have decent straigths with a lot of fast corners:

Tremblant:
http://www.youtube.com/watch?v=iRkcj...eature=related

Calabogie:
http://www.youtube.com/watch?v=PL0TD...eature=related

I have never lapped an S2000 on either track but from reference with the e46 m3 wich I've had much more seat time in I always though the longuer gears even if they didn't give as much torque out of corners gave more leanience with the rigth pedal. I'm thinking with the limited room for rubber in the s2000 longuer gears migth help with the right foot traction control.

So PuddyMod is the way to go... a full stage 4 is still big coin, I guess you have to pay to play.

 

Kings has a kit for the rear end. They use a 03-04 cobra diff with DSS axles. Then you will need a trans!

 

I am not going to drag race the car... Is the drivetrain that weak on the s2k? I had heard about the diff but never about the tranny.

 

people blow there diffs because of stupidity, i.e. dumping the clutch...theyre fine if youre stock, but if you plan on pushing 500hp like i think i saw you say, then yea, the weak link is the diff, then the trans

 

So let me get this straight....you want a 700whp capable turbo for road racing? Im not sure if you are aware, but the 6262 is a pretty big turbo. The BB version is very nice, but not sure if it would be beneficial for what you are trying to accomplish. I would steer away from the journal bearing version as is it too laggy to really make use out of on the track.

I would look into smaller turbos with better spool and midrange power. I would try the 3076R or even a 3071R and decrease your power goals.

As for the drivetrain, the diff is the weakest link. However, they mostly fail due to hard launching and dropping the clutch. I have a Puddymod stage 2 and its proven to handle up to 350whp no problem. That might be a good alternative for you, pairing it up with the turbos listed above.

 

I think everyone regurgitates what others say lol. I think for a twisty track it will be fine as long as you're not deadlaunching. But just remember that you're dramatically decreasing the longevity of the diff because you're introducing a lot more stress.

If you can afford it, R200 from the 90-96 300zx would be my suggestion. It'll be plenty strong for your goals and retains nearly the same gearing (off by .01 or so if I remember right). If you're not venturing to spend that much, I'd say to just keep an extra diff handy and play it by ear.

 

thank you dagle, i was going to say that...i saw what that jdmtyper guy posted and i was like, hmmmm i think i just posted that exact thing, im convinced 97% of the people that post on this site are morons

 

well if you make one part stronger then next weakest part will be the next to go.

 

no one roadraces with the power you're shooting for on hi-boost

 

I've had a GT35 track only sti before wich has a much more limited rpm range and never wished for more midrange or torque. Just play with the stick, that's what it's for.

I think I will try the stock diff and switch to the R200 if the stocker goes. My first HPDE car was a boosted wrx and I did 3 years with no transmission issues even though they are supposed to be made out of glass.

I will have both a low and a high boost tune. Slap some slicks and go ***** out, that's what fun is all about.

 

Keep the stocker. You'll be surprised. Wheel hop is what destroy's them.

 

Anything preventive you can do to limit wheelhop?

 

You are comparing two very different cars...Apples to Oranges. Not a fair comparison.

 

Im not going to take this comment the wrong way. I strictly stated the same because I agree with you, and nothing else.

No need for arguing, so Ill just leave it at that. Because apparently, you dont know me that well.

 

What 6262? They have the E S and SP I think. I have the SP and I wouldnt recommend that for road racing. Look into he 6262e. It will spool WAY better then a GT3071R. If you are set on getting something GT look into the GTX or else you are just throwing money out when you could buy a much nicer Precision turbo! as a example a 6262SP(82ar) will spool faster then a gt35R(63ar) solid is the 6262SP dotted is the gt35R. Notice the 6262sp spools a little faster even though it has a bigger AR! Im sorry but GT turbos are over rated unless its a new GTX... then its over priced.

Garrett DBB GT35R
- Non-hta
- Water cooled
- 5-bolt housing
- 0.63 A/R
- Bullet style anti-surge comp housing

Precision Turbo & Engineering 6262
- Billet compressor wheel
- Air-cooled
- V-band outlet housing 2.5"
- 0.82 A/R
- Ported shroud anti-surge comp housing




here is a link to the thread.
http://forums.evolutionm.net/evo-dyn...te-6262-a.html

 

My response was in reference to HondaKyle's reply. his planned hi-boost setting is unusable 99% of the time at 700+whp.

 

Just ordered powerflex bushings for all the arms, should elp minimise wheelhop. We'll see how long the stocker lasts then.

And I'm shooting for 500whp at highish boost (.82ar) I think it'll be manageable.

 

What turbo?

 

Full Blown motorsports has a very affordable rear end kit that uses the ford 8.8 rear end.

But like hondakyle says the next thing that goes would be tranny. FBM also has a solution for that but that isn't cheap lol

PM if you are interested

 

6262SP ballbearing. T3 .82Ar

 

I just paid for an R200 kit earlier today. When I get around to installing it i'll be sure to log everything along the way. that'll be a few months though.