View Full Version : Tech Advice on tranfering power to road @ 600Bhp
Hi all,
Im currently in the stages of rebuildting the 2JZ into a solid lump to run everyday around 600. Trouble is, this car has never put its power down very well at all.
I have HKS Hypermax II's with about 10k on them.
Im prepared to spend around £1500 on the rear setup (not including new spring dampers if needed) - Still waiting on Thors bushes... Im looking at the TRD LSD... Any comments?
Cheers.
Martin
Have you got the Hypermax II's ride height set low? If you have try raising the rear a bit so you have more spring travel, this will allow the rear to squat slightly when accelarating, which should improve traction.
If you need a good price for a new TRD LSD drop me a pm.
Have you got the Hypermax II's ride height set low? If you have try raising the rear a bit so you have more spring travel, this will allow the rear to squat slightly when accelarating, which should improve traction.
If you need a good price for a new TRD LSD drop me a pm.
Stock height out of the box....
I am after the Diff I think... it will be about Jan when im ready for that. Pm me a price delivered to the Uk if you have a spare mo.
Cheers.
M
Buy a TRD LSD...
Buy the best Tyres you can afford
Buy RLTC to save you're ass when even these can't help.
(What's the sping rates on the Hypermax's? Anyone know? I expect you could run softer springs...do HKS have different options?)
Buy RLTC to save you're ass when even these can't help.
Thats for the other comments, but RLTC is just masking the problem of lack of traction, and wont mean that im getting as much power down as I can.
Ive been driving around with 450bhp and no trac whatsoever for a year now... kinda love drift style.. wet or dry...as seen here......
Jay-450 Drift Zip (http://www.myimport.net/R3/m-jaydrift.zip)
So I may go RLTC, but personally I dont like Driver aids all bar ABS.
It's not masking a problem...it's maximising your traction...it's not a wimp out option.
600BHP on UK Roads with UK weather is not feesible through 2WD. You're dreaming if you think otherwise.
Your other option is to wide body your Supra and fit 335 Rear tyres...
RLTC is good for helping out...I have it and it doesn't cut in that often....but I'm grateful it's there just incase.
What I am concerend about is relying on it, it failing and then its all over.....
Jay, some of the big power SX boys run Semi slicks like Toyo R888's or Dunlop D01J's on the rear seems to work ok for them
Jay, some of the big power SX boys run Semi slicks like Toyo R888's or Dunlop D01J's on the rear seems to work ok for them
I still feel that might be masking the problem somewhat, I was really trying to get a more fundamental resolution... waiting on THOR's bushes really I guess.
What I am concerend about is relying on it, it failing and then its all over.....
If you had to put money on it, who would fail to control wheelspin first - a human or RLTC?
RLTC makes the car more fun to drive, it's enjoyable, and I can boot it in 2nd gear and rocket off instead of waiting until in 3rd before I can plant it :shrug: I had a misconfig a while back where in the wet in 4th at about 100mph it stepped out, to my extreme suprise... I caught it automatically and lifted off, then shat :D This misconfig is gone now and it works in the wet as well, it emphatically wasn't a problem with the unit, but my point is your natural reactions will step in in the unlikely event of RLTC failure, so it's maybe better to rely on yourself as the emergency backup...?
I've done all the "driving a big power car with no TC" hero stuff before anyone wheels out the tired old "but you aren't driving the car properly meep meep meep", and I really do prefer being able to plant it and not be a danger to myself and other road users by fishtailing up the road.
Anyway. Back to the plot - I use Pirelli P0 Nero's and uber-stiff Ohlins, and don't really have any traction problems, is yours that disasterous on the grip front or do you just use WOT on every bend...? Maybe it's just driving style?
-Ian
The Thor bushes won't help....they are stiffer...you should look at getting reduced spring rates.
And the masked problem is still that you will have more power than grip on UK roads.
Moon on a stick anyone??
True I suppose... OK then, all new bushes all round and some intermediate suspension, TRD Diff and, New arb's and bigger tyres..... ho hum!
and the choice of turbo make a BIG difference, you want a nice linear delivery of the power
Chris Wilson
03-10-05, 11:53
Softish, progressive spring rates on the rear, and a tall sidewalled tyre will help. DO NOT drop the rear more than 10 mm or it will be getting into severe negative under compression, and running near the bump stops even at normal ride height. Biggest mistakes people make with the MKIV is excessive lowering and very low profile tyres, neither suit the suspension kinematics. A TRD diff will help A LOT, as will decent tyres. Shifting weight off the front and to the back will help a bit, too.
Softish, progressive spring rates on the rear, and a tall sidewalled tyre will help. DO NOT drop the rear more than 10 mm or it will be getting into severe negative under compression, and running near the bump stops even at normal ride height. Biggest mistakes people make with the MKIV is excessive lowering and very low profile tyres, neither suit the suspension kinematics. A TRD diff will help A LOT, as will decent tyres. Shifting weight off the front and to the back will help a bit, too.
Glad you have chimed in here Chris, thats the sort of info I was after.
Do you think My Hypermax II's are ok for the job?? Stock OOTB setup at the mo. - Never really been too impressed wiht them TBH.
I intend to run 17's with stock size walls, but the better tyre manufactur's have High load sidewalls, wont this stop the flex I am after?
Thanks in advance....
Martin
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