Compression Question

How much static compression is to much? I currently have 14.5 to 1 and have heard anything more than 15:1 will cause problems what do you guys think?

Kinda depends on what you're burning and what you're doing with the motor. Kid's motor is 15+...runs fine.

My TFS Headed 557 was at 15:1 ran 114 fuel no problem, tuned easy also.

Mr Stevens I mud race(fast track) so 100 - 125 ft normally up to 150 ft ocassionally go thru at least two gears passes generally less than 3 seconds hopefully around 2.3 to 2.5 seconds long. I have to run gasoline but can use any octane I've been running 112 the past couple years. Motor is an iron headed 495 it is detailed in engine builds.

IMHO, with iron heads, I think you're fine right now. What do the plugs look like? how many runs do they last?

Thats been an issue been running ar-134 they last about 4 races and they were black(we down jetted 4 sizes and didnt seem to help changed air bleeds also), switched to ar-135 recently and they look much better light tan in color and color change on the electrode is middle of the curve.

Ar-133 with 14.5/1 and iron heads ...if any issues it'd be jet and timing or ing..