dannysupratt Posted December 20, 2007 Share Posted December 20, 2007 Hi guys i have got a uk spec manual tt with full bpu mods i would imagine it was running about 380bhp no more than 400 anyway. I have serious problems putting it down, i know that is a small amout of power in supra terms but it spins all the way through 1st and second gear in the dry. Even with traction control on it just kills the power its goes like hell in 3rd but just wish there was someway of putting it down in the first few gears. I have got 19" wheels on with toyo tyres 265/35/19. Would lowering the car help atall? And how the fook do you guys with big singles put it down? as always any help is much appreciated Quote Link to comment Share on other sites More sharing options...
michael Posted December 20, 2007 Share Posted December 20, 2007 Racelogic traction control (RLTC) might help control things for you, the standard TRC is pretty pants. Quote Link to comment Share on other sites More sharing options...
dannysupratt Posted December 20, 2007 Author Share Posted December 20, 2007 emm any idea how much this costs? Quote Link to comment Share on other sites More sharing options...
Nic Posted December 20, 2007 Share Posted December 20, 2007 RLTC is very good, really worth every penny. A powerful rear wheel drive car needs an amount of rear suspension travel to help get traction, ie. the rear of the car will squat slightly under power. If your suspension is lowered excessively or the spring/damper rates are too hard, then your suspension won't be able to transfer the power to the road and the wheels will just spin. Quote Link to comment Share on other sites More sharing options...
Guigsy Posted December 20, 2007 Share Posted December 20, 2007 Mine is 390bhp and although its auto it doesnt spin all the way through first and second. It will spin the wheels up on the second turbo if i burry my foot to the carpet. But then the Traction control cuts in and its ok. if i keep my foot down whist the TC is on and it then goes off it will just spin up again. Id recommend (especialy in this weather and time of year) not moving your right foot so much Quote Link to comment Share on other sites More sharing options...
Daston Posted December 20, 2007 Share Posted December 20, 2007 Racelogic traction control (RLTC) might help control things for you, the standard TRC is pretty pants. RLTC is for girls your right foot is all you need Quote Link to comment Share on other sites More sharing options...
colsoop Posted December 20, 2007 Share Posted December 20, 2007 Why not lower the boost to reduce that effect. My car runs 0.9 bar and has no prolems transmitting its power to the road although i run stock 17's ! A powerful car is nothing if it can't tramsit that in to forward momentum This time of year you really should be careful with how much power you are trying to use, the conditions are not conducive to fast driving in rear wheel drive We have lost 9 cars already ! Quote Link to comment Share on other sites More sharing options...
dandan Posted December 20, 2007 Share Posted December 20, 2007 RLTC won't increase your traction at all but instead of spinning the weels you'll get pops and bangs from the exhaust and a "safer" ride... You need to bin the 19's so you can run higher profile tyres - I change back to stock rims and tyres for the colder months for this reason (and to keep my other wheels looking good). Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted December 20, 2007 Share Posted December 20, 2007 I have got 19" wheels on I would say thats your problem......what else do you have in terms of suspension?? have you had a proper geo setup (ie a Chris Wilson one or similar?? Quote Link to comment Share on other sites More sharing options...
tooquicktostop Posted December 20, 2007 Share Posted December 20, 2007 Larger than stock width tyres, big power, heavy right foot and poor road conditions at the moment, welcome to the winter, the only real way to get traction is be progressive with your application of the loud pedal, I have a big single and a TT and as long as you are careful you are ok, I think actually the TT is more tricky in poor conditions as you are on boost were in the single you drive off boost most of the time due to it not kicking in until 3500rpm, you have changed gear by then (or you should have if you want to stay pointing in the right direction !!) Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted December 20, 2007 Share Posted December 20, 2007 How do you get traction! Usually, I don't Being progressive with the throttle does help but 1st and second are a bit of a noisy joke. Quote Link to comment Share on other sites More sharing options...
AJI Posted December 20, 2007 Share Posted December 20, 2007 softer suspension or softer shock absorber settings would allow your car's weight to transfer more to the rear which would help traction. Tyres are important. But I'd say the most important thing is your right foot on the throttle. As your turbo's come online just ease off the throttle slightly before re-applying it. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 20, 2007 Share Posted December 20, 2007 A taller profile tyre on a 17 or at the most, 18 inch rim of moderate width, with decent progressive rear springs of the correct rates, and with matched damper valving will transform it. I have never EVER driven a MKIV on 19 inch rims that's anything but dire. The owners of the cars may be happy, and say it's fine, but when I drive them *I* find they are dreadful, and I drive dozens of these things every year. Quote Link to comment Share on other sites More sharing options...
edge Posted December 20, 2007 Share Posted December 20, 2007 Would uk suspension on the rear prove better than say eibach with yellow billies on? Quote Link to comment Share on other sites More sharing options...
edge Posted December 20, 2007 Share Posted December 20, 2007 Would uk suspension on the rear prove better than say eibach with yellow billies on? Or tiens set soft and higher? I know nothing about suspension setups:rolleyes: Quote Link to comment Share on other sites More sharing options...
RedM Posted December 20, 2007 Share Posted December 20, 2007 Stick some bags of sand in the boot. Job done. Quote Link to comment Share on other sites More sharing options...
bodilx6 Posted December 20, 2007 Share Posted December 20, 2007 I'm running on 8x18 rims with 245/35 falken (452s or somthing) and 40mm lowered, 6sp BPU @ 393fwhp. I have traction issues as soon as the road is anything but completely dry but when it is no spin unless provoked. But when the road is damp (like it seems to be constantly from september to april) I'm having real probs. Of cause the most effect will be had for dosing the right foot correctly, but that is comparable to using some good traction control electrionics fx RLTC. BUT how much of a gain will be had (again @ BPU) from the following (please prioritize if you have experience) if I want to put as much power as possible to the road going straight: Wider rims Smaller rims Wider tyres Higher profile tyres Other tyre brand (please suggest by experiense) Less lowered suspension or softer rear suspension Using a "smart" boost controller to push to 1.2 bar in stead of just the restrictor Quote Link to comment Share on other sites More sharing options...
Gazboy Posted December 20, 2007 Share Posted December 20, 2007 I can't beleive what I'm reading here. Try this: http://mkivsupra.net/vbb/showthread.php?t=131040 Quote Link to comment Share on other sites More sharing options...
dannysupratt Posted December 20, 2007 Author Share Posted December 20, 2007 I would say thats your problem......what else do you have in terms of suspension?? have you had a proper geo setup (ie a Chris Wilson one or similar?? Thanks for the tips everyone, I was actually thinking of getting some standard 17" if i can find some for sale. I have got bilstein shocks on the back with standard springs at the moment and was going to change the springs for eibach ones. As for the geo setup i think it has just had one at toyota. Quote Link to comment Share on other sites More sharing options...
robin Posted December 20, 2007 Share Posted December 20, 2007 I have stock uk wheels and stock uk suspension and with the car at 0.9 bar I will only loose traction in 1st if its pouring with rain/icy/loose surface. If its just damp it spin. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 20, 2007 Share Posted December 20, 2007 Eibach springs are too low, IMO. The car gets onto the bump stops in squat with them, there's not a lot of suspension travel on the stock ride height, dropping it much is a BAD idea, for several reasons. Quote Link to comment Share on other sites More sharing options...
dannysupratt Posted December 20, 2007 Author Share Posted December 20, 2007 Eibach springs are too low, IMO. The car gets onto the bump stops in squat with them, there's not a lot of suspension travel on the stock ride height, dropping it much is a BAD idea, for several reasons. ok thanks for advice chris, i just think it is going to sit really high with the oem kit on and the 19" so i might look at getting the stock wheels Quote Link to comment Share on other sites More sharing options...
Guigsy Posted December 20, 2007 Share Posted December 20, 2007 i was about to type "mine has eibach springs and there ok" but then i saw it was Chris W who posted... so to avoid looking stupid i wont.... oh crap Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 20, 2007 Share Posted December 20, 2007 ok thanks for advice chris, i just think it is going to sit really high with the oem kit on and the 19" so i might look at getting the stock wheels Forget the WHEEL diameter for this argument: If the TYRE overall diameter is the same, or nearly the same as the stock 17 inch tyre, then your ride height, with a given spring height, will be the same. If people have Eibachs, and like the ride and stiffness, but want to raise the car to a more sensible and geometrically sound ride height, and you have BILSTEIN dampers, I can machine them to achieve whatever height you want / need, or even convert them to adjustable ride height. It's not a while you wait job, and to just alter by machining will cost 350 quid, but it IS an option... Quote Link to comment Share on other sites More sharing options...
Chewie Posted December 20, 2007 Share Posted December 20, 2007 Why don't you learn to drive? 400 BHP is obviously too much for you. Sounds like another Supra death coming up. Quote Link to comment Share on other sites More sharing options...
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