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..."The turbo is stock compression for greatest possible combusion chamber volume, but runs 100LL and 1 quart to 4 gal (16:1) because it detonates at 3PSI boost on 93UL."

Time for an intercooler! ...

I hate to say it, but--other than a suspiciously torn fuel pump diaphragm years ago--I haven't had that much trouble with ethanol gas. However--and this is crucial--I NEVER, ever leave that crap...

Ah yes, the old Ford 352. I recall (when I worked in a junkyard) trying to get their distributors out without breaking them.

Jeff

Right! I recall several, spirited street races between by buddy's 57 Chevy and my sister-in-law's 57 Ford. The Ford cleaned house!

Jeff

"Ash" sure was the problem back then, when I first started yanking the starter handle on my KG-7. The best oils were LOADED with ash and fouled up the works in short order.

For that matter, 4...

Am I wrong (hah!) but isn't that YZ-250 air cooled? If so, his results are out the window when discussing water-cooled outboard engines.

Jeff

The expensive one! (Just kidding.)

Jeff