Hi Clive, The car is about 2350lbs, 42% front. So:
front: 987lbs
rear: 1363 lbs
I've run the numbers in my spreadsheet and with 150lbs in the front, stock rear TB's, and 150lbs rear coilovers gives (approximately) an 11.2%CPM difference, 104 front, 117 rear. So 150 lbs coilovers would be perfect as far as the numbers are concerned.
With the extra weight I think I will need the stiffer front AR bar as well as the rear AR bar. I mean, everybodies doing it
! It seems that all the cars I see are running rear sway bars, is it because its needed? because its the thing to do? Compensating for too low rear spring rates? My car understeers even with the weight fully transfered to the front. The only way to get the rear to turn is by serious trail braking at high speeds, massive amounts of throttle input turns the rear into a steamroller and the car straightens even more.
Mike
Quote:
Originally Posted by evilC
Mike,
do you know what the cornerweights are? My guess is like the others that the rear is way too soft for the front. Modify the rear of the car in stages so you can get a detailed assessment of the effect of each mod. Which TBs are you going to use? If they are the standard 944 - 23.5mm ones, even these might be too soft for the weight of that scooby in the rear. Why don't you get some coilover dampers or a kit for the KYBs and add your 10" 150lb/in springs onto it. At a guess, the combination with std 944 TBs will give the correct springing for the heavyweight rear although the KYBs might be a little soft on the damping side. A good rebuildable damper is the best way to go to allow further options.
I'm a firm believer in leaving the antiroll bar off until all the springs and dampers have been selected and then using them to fine tune the handling. I would interested to see what happens with the 150lb/in springs/billys up front and 944 23.5TBs with 150lb/in coilover in the rear with no antiroll bar front or rear. I think you will find that the current set up overloads the front outer tyre and the anti-roll bar has no chance of coping with the roll. Once the rearis stiff enough the load will be taken off the front outer and then steering will return.
Clive
Oops! just realised that you can't leave the front anti-roll bar off so just use the standard one for now.
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