I have a mystery 350 motor, all I know is that it's a 1980 block and has -041 64cc heads. It's assembled less carb and exhaust manifolds. Cranking it over with the starter I get the following HIGH readings.

1 = 220
2 = 260
3 = 220
4 = 215
5 = 240
6 = 260
7 = 240
8 = 235

Is the test flawed in some way due to no carb / exhaust. I thought the gauge might be wrong so I tested one cyl on my '89 Bronco and got 145 which is about right. Do I have a racing fuel monster?

[ 05-21-2003, 05:53 PM: Message edited by: rojo ]

Yep. And from the looks of it, one that needs freshening up. A 55psi difference between high and low cylinders isn't a good thing.

Any idea on what kind of octane it would take to satisfy those numbers?