What is the stock tire size for an 89 Formula?
Is 2500 rpm at 75mph about right for a stock A4 setup?
On a 350 TPI does it just have a screw in oil fill cap on the valve cover or is there an extension also? Mine has an old tech push in vented cap in the hole and I want to get the right parts in there.

thanks in advance,

 

What size wheel?

Depends on your gear but I had 2000 rpm at 65 mph stock with my A4

Screw in.

 

thanks for the reply,

 

Al, it sounds like you have some 3.42's or 3.73's in that car. My motor turns 2600 RPM at 70 MPH with the stock 3.73's.

Stock tire size is 245x50x16, IIRC. About 26 inches tall.

 

Thanks Dan,
It's got 235-60-16s on the back which throw the speedo off by about 5% so I'll just drive it a little slower 'till I can afford new tires.