924Board.org

sayst · Joined: 20 Sep 2004 Posts: 8

I just bought 77 porsche 924. I don't really have many idea about this car. Anybody know the proper tire pressure and octain level for this car?

AznDrgn · Posted: Wed Sep 22, 2004 11:30 pm Post subject:

87 octane gas is fine for that car and tire pressure is ~28psi, it should say in the inside of the door jam.
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-'87 Jeep Cherokee 4.0L 6" of lift 33" Super Swampers

-'83 Callaway 944 2.5L turbo, 300HP, 1 of 42 ever made

Neil924 · Joined: 18 Mar 2003 Posts: 4225 Location: Canada

For tire pressure, look at the tires you have. It should be near 32 psi. And you can use a lower octane. Here we have 89, 91 and 93. I use 93, although I really don't think I need it. I think most guys here use "low grade" unleaded fuel.

sayst · Joined: 20 Sep 2004 Posts: 8

Thanks for reply. I appreciate it.

Domino · Joined: 17 Aug 2004 Posts: 10 Location: Phoenix, AZ

I have a '77 Martini & Rossi. The owner's manual recommends 26 lbs. and premium gasoline. I run about 28. Anything over that and the ride gets pretty rough. Stock tires by the way. The best I can get in Phoenix is 91 octane and the car runs fine on it. I tried 87 octane and I got a lot of surging under 40 mph.

CMXXXI · Joined: 05 Nov 2002 Posts: 1939 Location: Vicksburg, MS

Tire technology has advanced a great deal since these cars were put on the road. The pressures written in the Owners Manual and on the car's stickers were written with those 20+ year old tires in mind. Grant it, the numbers for todays "modern" tires may not be far off, but you can't take those old inflation values as gospel.

Octane rating is another story. I'd use whatever the manual and stickers indicate. If your car starts to ping under load, go to the next higher grade.

This thread <click> is a rather "spirited" one that covers a myriad of topics, to include tire pressures and octane ratings.
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'79 Eurospec 931