1gary

this is a off shoot from way,way,too many threads questioning on a steel head a SCR of 9.5 and DCR of 8.5 and a quench of .035 to .040.Also a aluminum head of 10.5 with the same specs.

The miss conception is these specs are for a blueprinted race only engine.Well that is the farthest thing from the facts. Just think race cars are generally race only gas and what we are describing here is a pump gas car and how to successfully deal with the wide range of pump gas out there.

No,no,no other guys adventures on too high of a SCR which ends up being De-turne leaving more on the table than it gained.

This thread will be a outline on how easy it is to build.

Gotta go right now.Be back later.

1gary

What gets me irritated more than anything is internet hero's that with their advise is soooooo willing to put at risk people's project and money.Of course not theirs mind ya.they go on and on about how special the builds I tell people about and they are blueprinted engines which is total hog wash.

True enough most threads we have dealt with are "saves" after the fact.This thread is to help prevent that from happening.

Remember there is a huge range in pump gas even ones of the same brand in the same town of the same octane.And Not all detonation is the kind you can heard knocking.In the upper rpm ranges it is a silent engine killer.There in is where quench ranges play a major role in prevention.

So let get to it and you'll see how easy it is to build a engine on today's gas.

D-cup reverse dome pistons on a 5.7 rod at 0 deck with a .040 head gasket.

http://www.crankshaftcoalition.com/w...tons_and_rings

Set the DCR with a cam choice:

http://www.crankshaftcoalition.com/w..._compatibility

Using a range of a head from 67cc to 64cc.

That simple.Will run any-day everyday.Match parts builds will out run a pc meal'ed haft bass suggestions we see way,way,too much of.

You can tailor the power curve by intake runner sizes where on a 350/355 a 180cc intake runner will help the bottom end and a 195cc will help the mid to top end.On a 383 to 406 a 195cc runner will help the bottom end and a 200 to 225 will help the mid to top end. Cam accordingly with a bottom end to support what the intended use will be.

Now either guys take over 50yrs of building these engines to heart orrrrrrr find it is just too much trouble for them to follow a simple formula.

But guys nothing that special about it.Certainly not blueprinted..............

1gary

While I am at it.Aluminum head do need a deck finish number to seal the small shim head gaskets well.What get complicated is the material's expansion rate being different than the cast block's rate compounded by a thin gasket.Kind of a coin flip.