PSM and Tire Diameter, LONG
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I'm just thinking there is a way to make the ABS unit think the PSM pump is plugged up, even when it isn't. It might be worth while to monitor the voltage from the PSM pump to the PSM brain in the ABS unit. It it's a constant voltage, than a resistor may be enough.
Later, Steve
Later, Steve
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I'm just thinking there is a way to make the ABS unit think the PSM pump is plugged up, even when it isn't. It might be worth while to monitor the voltage from the PSM pump to the PSM brain in the ABS unit. It it's a constant voltage, than a resistor may be enough.
Later, Steve
Later, Steve
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If the ABS thinks that the PSM is plugged in then it will still send a throttle retard signal when it feels PSM need to interfere. The rear wheels will not be "pulsed" by the PSM pump since it wouldn't be plugged in. If it even worked. It's unfortunately not so simple. A fault detected by the PSM "brain" in the ABS module is what takes it totally out of the loop.
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Back to this thread. I'm running RWD and fit new rear tires 1+ inch taller than the fronts, didn't think it would matter. It did, PSM was going crazy. I'm on coilovers and can adjust ride height which I did all over the place and in the end it was PSM that was problem intervening in most every turn.
I figured my only solution was to buy near same diameter front tires. I did, 245 40 18, with 3 rev per mile difference than the rear. I tested the car tonight and it went from scary and unnerving to fun and exceptional handling, and that is without fiddling with my ride heights which I'm sure are not right and because of that my alignment is all out as well.
My alignment will only be right with the suspension set at the height at which it was aligned originally. I will play with heights and rake angles and when I get the high speed stability that I want and quick enough turn in coupled with the right clearance for looks and practicality, I'll have it set to near GT2 ROW specs.
I figured my only solution was to buy near same diameter front tires. I did, 245 40 18, with 3 rev per mile difference than the rear. I tested the car tonight and it went from scary and unnerving to fun and exceptional handling, and that is without fiddling with my ride heights which I'm sure are not right and because of that my alignment is all out as well.
My alignment will only be right with the suspension set at the height at which it was aligned originally. I will play with heights and rake angles and when I get the high speed stability that I want and quick enough turn in coupled with the right clearance for looks and practicality, I'll have it set to near GT2 ROW specs.
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I will try 265/35/19 paired with 305/30/19, hope fronts will fit. This way we can run RWD or AWD as the fronts are bit bigger than rears. will let you know how it works out in the end.
If they will fit, my tires are Cup2s so guess they will cut some good times on the track too, will try to run the 265 for testing on a 8.5J rim only but going for 10J if they will fit and not rub or anything
If they will fit, my tires are Cup2s so guess they will cut some good times on the track too, will try to run the 265 for testing on a 8.5J rim only but going for 10J if they will fit and not rub or anything
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