I know this is not related to the FI forum but mods plz keep it here since I'm looking for answers from FI'ed members.

my next purchase would be either LSD or coilovers. my problem is that I'm having a hard time hooking up the car in 1st and 2nd gear. all I get is wheel spins. and yes I'm still on stock suspesion.

what do you guys think and why?

 

LSD will help a little with traction

suspension will help with handling

depends on what's more of a priority to you right now. Tough choice, but I'd do coilovers personally because an LSD isn't going to give you any sort of magical traction. That's more of a tire issue

 

sum it up for you perfectly

 

I have Michelin PS2 275 tires in the back. I want to improve traction and leave handling to a later stage.

when you say that LSD will help a little, you mean its not worth it and donest make much of a difference?

 

well the tires and tire sizes are the primary way of getting traction. The LSD just prevents one tire from spinning and all the power going to that tire. If you have the stock vLSD then for going in a straight line, that takes care of that in a big way compared to an open differencial already - as far as going in a straight line.

All an aftermarket LSD will do is make the lockup engagement happen sooner compared to the stock VLSD. When you're going straight and you floor it and lose traction, it is possible to have one tires lose traction first probably mostly due to wheel hop or because it's just not sticky enough to grip. If you had better tires, you'd probably get more traction than an aftermarket LSD will help you with.

275 PS2 tires aren't bad. I used to run 295 PS2's, but IMO that tire still isn't the greatest choice for grip because of its tread pattern and it's handling suffers because of the soft sidewalls

 

I say coilovers and SPC arms with a 305 tire in the back. Lift back up a little and roll the fenders to ensure no rubbing and then get more postive camber in the back.

 

just out of curiosity what tires do you recomend?

 

BFG KD or most of the street legal compeition tires. Or drag radials if you're mostly concerned with going straight and not going 150+mph or so

 

Is your car equipped with the factory VLSD? If so I would also recommend coil-overs (HKS Hipermax RS are great for street use, TEIN Flex for Street and track use) and some type of camber correction arms for the rear, since too much negative camber in the rear will diffinetly give you traction issues.

If you do not have a VLSD, and have the OEM open diff. The Carbonetic LSD would be a GREAT idea

-George
GT Motorsports

 

Your power and trq is overpowering your suspension and chassis. I would start with a good set of stiff coilovers, such as the Tein Mono Flex with 14kg spring. Install some MUCH wider rear tires, such as a 305 section tire, and get a good alignment done (camber kit if needed).

LSD's will help you more in the turns, but they do help in a straightline particularly if you are running an open OEM diff.

 

Personaly I would say Coilovers... with a good camber adjustment.
Go for the 295's at a minimum or 305's if you are willing to roll the fenders a little.

 

I have VLSD so coilovers it is. thanks guys..

 

yes!!! I was hoping you were gonna decide on that instead.

 

I thought that a stiffer suspension would not help the car at all for traction. The softer stock suspension lets the rearend squat to help put more weight on the back tires?

 

just curious, how much power are you putting to the wheel?

 

You are exactly right, Im surprised some of the in this thread people recommended coilovers. Best set-up for launching/traction IMO is the stock suspension or something soft like the Nismo S-Tune or Hotchkis set-up....

 

Getting a good tire under the car should be first priority. I am not sure what you use the car for, but if possible look into some MT drag radials - they hook great and are still a street tire.

Coilovers can help if you get a set that are NOT stiff - you want weight transfer. Look for a set with lower spring rates, something like 9/6 should help out, then adjust them to where you get a good squat but not too much where it starts bouncing back up and unloading the tires.

We have a set for drag racing, I'll send you a PM.

 

^^^Only if he plans on drag racing the car^^^
With this much power, he will bottom out his suspension with softer springs, and his handling on a circuit course, or twisty road will be terrible.

 

^^^ Which is why I asked what he would be using the car for, and referenced "drag coilovers". They will not bottom out if you adjust them past that point as I mentioned.

Stiff suspension will only make the the car slide around more, not less.

 

I'm confused now...

let me get this straight, I'm more concerned with drag racing but love to go to road course from time to time. what I understand from this thread is stiffer springs wont help with drag racing. and soft springs (stock or likewise) wont also help on the road course. I have a set of hotchkis springs sitting in my garage for 3 months but have second thoughts of installing them since I need more control and a lil more stiff ride than the stock.

any good coilovers that helps with both drag racing and on road course?