Can someone look at their 87 or 88 S4 for me?
02-06-2007, 07:12 PM
#61
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Makes sense if it's all cars as when I think about it, that's the way I set up the autox cars I run. Miata has more in front, MR2 2-3 psi more in back. The way Porsche originally specified the 928 seems to be an exception to that rule.
02-06-2007, 07:18 PM
#62
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Originally Posted by Richard S
At the ORR's, almost all drivers increase the cold tire pressure before the race. I set it at 40psi before the start. It is done in order to keep the tire temps lower during the event. The organisers keep tire data for each car, and used to measure tire temps for every car after the finish line. Is Porsche recommending a high cold tire pressure keeping in mind the speed potential of our cars?
Rich
Rich
02-06-2007, 07:19 PM
#63
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Originally Posted by Shane
I used to run 34 in mine all the way around, and this was just fine for sedate driving. But when I check tire pressures after some spirited driving, they were up around 38psi, even more when I was running at the track. So now I drop them to thirty when I know I'm going to put a lot of heat into the tires.
02-06-2007, 08:16 PM
#65
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So what is recommeded F/R tire PSI's for Boxsters and Caymans?
I'd like to see a pic if anyone is still running Pirelli P7's. Didn't Porsche spec those back in the late 70's early 80's.
I likeee 'em Silica laced rubber. Sticks nice and good.
Ernest (NYC) Got nomex everything except Helmet/balaclava.
I'd like to see a pic if anyone is still running Pirelli P7's. Didn't Porsche spec those back in the late 70's early 80's.
I likeee 'em Silica laced rubber. Sticks nice and good.
Ernest (NYC) Got nomex everything except Helmet/balaclava.
02-06-2007, 08:35 PM
#67
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Hey, H-man. Be nice to Ernest. He's a little Lysdexic.
02-06-2007, 08:36 PM
#68
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Yummmm!
Sweet Greek Treats. Me like.
Running oversized balloney 245/275 on 8" and 9" rims using tires as rim protectors.
It was such a difference coming from 245 to 275 rear tires.
Mid 30's pressure.
Wonder how thumpey the car will be at 40psi and NYC pave.
Ernest (NYC) Need to git me a baklava hat.
Sweet Greek Treats. Me like.
Running oversized balloney 245/275 on 8" and 9" rims using tires as rim protectors.
It was such a difference coming from 245 to 275 rear tires.
Mid 30's pressure.
Wonder how thumpey the car will be at 40psi and NYC pave.
Ernest (NYC) Need to git me a baklava hat.
02-06-2007, 09:02 PM
#71
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Originally Posted by ew928
Ernest (NYC) Need to git me a baklava hat.
02-06-2007, 09:59 PM
#73
Guys, Don't forget that a higher pressure also gives a lower rolling resistance.
My late but not forgotten 86 Audi 5000 Turbo Quattro come with special Dunlop D8's
with an recommended inflation of 44psi to get that last bit of speed and milage. Mac
My late but not forgotten 86 Audi 5000 Turbo Quattro come with special Dunlop D8's
with an recommended inflation of 44psi to get that last bit of speed and milage. Mac
02-06-2007, 10:27 PM
#74
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Originally Posted by Joe '87 S4
This is very interesting. I've always inflated my tires (original 16") to the specs on the door. 22,000 miles and even wear all the way around.