E85 vs 91 for street
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11.3-1 & 87 octane?
Where’s the BS flag!
Well, I see you read at least the first paragraph, the one I specifically wrote for you,cuz I expected you to bark, and expressly qualified it with
IMO. You can't argue against opinion, it's an unwinnable endeavor.
I said; 87E10
and I said, "Some of us run deep into the 10s and into 11/1 Scr with them and tickle 200psi cylinder pressure, and run pumpgas"........... I didn't say I did......But truthfully, I have run 11.3-Scr with the 292/508/108 cam. The current cam runs 10.9, and you're welcome to come over and measure it.
As you well know;
Detonation is initiated, whenever the heat in the chamber exceeds the ability of the selected fuel to resist auto-ignition. Ergo; no excess heat,no detonation. So it's a simple thing, to keep the heat below auto-ignition.
Like I said, IMO,aluminum sucks a lot of heat out of the chamber, allowing the designer/builder,Me in this case, to experiment; and since I didn't understand it....I did experiment.
You're welcome to your opinion, of course, but looking for the BS-flag, I think is a bit harsh.....especially since others right here on FABO, have stated they run 200psi and more,on pumpgas. Besides, I have over 100,000 miles on this engine, and it has almost never run on anything else. Had it been detonating,I'mthinking,it wouldn't have made it this far on hypers and used teener rods.
But for those who may be interested;
Proper timing delays the heat/pressure rise to a point in the pistons travel, where it also doesn't create the pressure spike, that leads to detonation.
So; unlike some, and contrary to popular thinking,I don't run idle-timing of 18 to 25 nor 25/35 at 2500 rpm. My engine is married to the rear tires, by the manual trans, so that might spell the death rattle. And besides, at 10.9Scr,with a 276/286/110 cam, it would be a bucking bronco as soon as I slipped the clutch out. No, I run a nice gentle 14* , cuz I have all this hi-pressure available,at the flick of my toe. I don't need to resort to that kind of abuse. And so I can dump the clutch, and motor away, without so much as a peep of complaint. The 10.97 starter gear buzzes the Rs up plenty quick, making it easy on the engine, and I can, if so inclined, floor it at very-low rpm, without fear, even at extremely-low rpm if the tires are already spinning,lol. Sometimes I put the line lock on, and break the tires loose at a light. Then idle it down to some lower, not observed rpm, where the tires are just barely spinning. So I'll guess 800to1000 rpm. And when the light turns green, I'll give you one guess what's gonna happen next....... that's right, the 750 Holley-Double-Pumper is gonna get a workout. The T-port is nicely synced, the pump is fully charged, and she's eager to please.
If you were to call bs on me, you'd also be calling BS on all those other FABO guys that say they are running; even closer to the edge.