at 10 and 12 psi it's okay but at around 14 or 15 psi on the highway the rear of my car starts jerking around almost like the tires are out of balance and they are wobbling or something but it only does it when the boost is turned up. What could it be?
thanks

 

New thought, I think that it might be spinning the tires, but at that speed? The tires I have on it do suck. The rear tires are a little low on pressure, I'll put some air in them and then try again. Still, anybody else have some thoughts?

 

When the second turbo in my FD FIRST kicks in around 13 pounds I can feel a small amount of slippage/jerking. I can also hear what sounds like wheel spin. I think it is just the tires.

 

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When my second turbo goes online in second or third I get a bit of wheel spin (poor traction Kumho Ecsta 712s). I can spin through first, and all of second if i don't feather the throttle. Shifting into third yields another chirp and then when the second turbo comes on hard, the tires spin again (esp when cold outside). This is how it is running 12 lbs + psi.

It is less of a problem when I have my R compound tires on (A008RSIIs)

What mods are you running?

Mike

 

I think that my tires are probably the culprit, they are some pos "T" rated potenzas.

my mods:

m2 intake
m2 medium intercooler
HKS super seq bov
non sequential turbos
power fc
1300cc secondaries
dp,resonated mp, cb
profec b
RP fuel pump
fan mod
boost gauge
air fuel monitor
some upgraded clutch, dont know for sure what checkpoint put in
The rear end only "shudders" under 14 or 15 psi.

 

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back to the top, I know that there are others out there with close to the same mods that I have and the same boost.

 

If you up the tire pressure they will only spin easier if that is the case.

 

bump

 

i always just think my tires are spinning...i wish it is just my clutch is bad. i have the stock clutch with about the same mods as you. it sucks

 

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