[HWYSTR455]

My last iron head engine was a .030 over 400, scr was 9.98. I swapped multiple cams thru it, and it just wasn't worth the effort of tuning to keep it out of det. Bad tank of gas, dial the timing back. Weather gets above 90 degrees, dial the timing back. 3-4 people in the car, dial the timing back. It was insane, would literally carry a timing light with me and dial it back on the side of the road. I had marks on the dizzy base and a mark on the block, could do it that way, but preferred to use the light, was more accurate.

I'm at about 300' elevation though.

455s, different story, they needed a half a point less everywhere to keep it out of det than the 400s.

So along the same lines, you can see why folks with 289s, 302s, 350s, and 351s can get it to live at 10:1. You might be able to do it with a 400P, but still think it's not worth it, the minor power you might gain will be lost having to dial the timing back, so, again, pointless.

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