engine build ?

Whats the highest compression I can run with 93 octane pump gas? I am using a C9VE-B block and D2OE-AB PI heads. I have not decided on what size engine yet I was going to build a 466 with eagle or scat h beam rods and srp or probe pistons, but after looking at prices I can see that it wouldn't cost much more to buy a stroker kit. Would I be better off using my D0VE-A 2 bolt block? I would like it to be around 500 hp and not turn it over 6800 rpms. I would rather not tear down my 1970 460(would rather sell it) but I would if you think that I would have any problems with my 1969 block holding up. This will be a weekend street car.
Thanks
Bob

I would say nothing over 10.5, and that's kind of pushing it. Keep in mind how much timing you will end up running. You don't need high compression to make power, but it does help. Try not to push it, I'm in the low 9's high 8's so I have my piece of mind.

But listen to the experts, I've just heard that 10.5 is probably the most you can get away with.

Is E85 available? Seeing as how it's a weekend car, have you considered methanol injection?

If you keep your quench real tight it will be more tolerant of pump gas, zero deck your block.

Bill

There has been some very impressive builds posted on here and the other site in the last couple of years. Big inch. pump gas stuff with big horsepower. I am no expert but I understand that by paying attention to things like quench, combustion chamber design, ignition timing curves, and especially camshaft design, mechanical compression ratio's can be run that previously where thought to be impossible. Do some digging and talk to some people that have done this stuff before.

dkp

Engine size makes a great bit of difference as to the allowable compression ratio as uncontrolled cylinder pressure and temperature are what is the major cause of detonation.

The size of the engine and the camshaft will comtrol cylinder pressure along with the static compression ratio.
Cumbustion chamber turbulence along with burn temperature, (quench) will allow slightly even more cylinder pressure than normally would be considered.

Hi all
Thanks for responding,
Matt, I can get E-85 at the local stations. Can you use it in hp engines? I have decided on building a 501 stroker. I plan on using a hydraulic flat tappet cam that will pull to 6500-6800 rpms, torker II or port-o-sonic intake (not much hood clearance even with the crites ram air hood) c6 with 3000 to 3500 stall converter. I figure that the car will weigh around 3500 to 3800 lbs. It has a 3.89 9 inch pos. under it and I will be running 27-28 inch tall rear tires. The car is a 66 Fairlane 500 XL with a RC motorsports mustang II front suspension.

A friend of mine said to have the block decked so that the pistons will come about 0.005 out of the top of the block and use a 0.041 thick headgaskets . Is this a good idea?

No .035-.036 is to tight of quench with the bore size of a BBF, need to stay in the .043-.045 range to be safe. Those specs are more inline for a small block.

dfree383 wrote:No .035-.036 is to tight of quench with the bore size of a BBF, need to stay in the .043-.045 range to be safe. Those specs are more inline for a small block.

OR ... if using cast pistons having little piston to cylinder wall clarance where the piston rocks very little.

E85 is more detonation resistant than standard gas due to the alcohol content in it. Kicker is your going to burn more of it.