Aftermarket Heads or Port Cast Iron
February 4th, 2014, 03:55 PM
#201
Registered User
Join Date: Nov 2008
Location: Central Fl
Posts: 7,827
[QUOTE=Smitty275;650285]Not gonna happen very easily. For love the valve reliefs are totally wrong. SBC valves are at a 23° angle. Ours are at a 6° angle. Valve placement in the cylinder is totally different as is the combustion chamber. You'd be doing a lot of modifying of the dome to make it work and would most likely end up with holes in it some where. Most domes are hollowed out underneath to reduce weight.
[QUOTE]
You and I have had this discussion before. With all due respect, unless you have lifts of .700 or more and on a very tight lobe sep this isn't an issue.
I know this to be a fact. I used a SBF piston in the last DX I did. With .610 lift and 234@.050 on a 108 I still had .240 piston to valve clearance at tdc overlap. That's more than plenty.
However you are correct on the dome position. Chances are you'd need some work there and that could get costly, if the piston could even take it.
[QUOTE]
You and I have had this discussion before. With all due respect, unless you have lifts of .700 or more and on a very tight lobe sep this isn't an issue.
I know this to be a fact. I used a SBF piston in the last DX I did. With .610 lift and 234@.050 on a 108 I still had .240 piston to valve clearance at tdc overlap. That's more than plenty.
However you are correct on the dome position. Chances are you'd need some work there and that could get costly, if the piston could even take it.
Last edited by cutlassefi; February 4th, 2014 at 04:00 PM.
February 4th, 2014, 03:57 PM
#202
" Hoo yah "
Join Date: Sep 2009
Location: North Park,IL
Posts: 406
I suppose since they are relatively new, there aren't a ton of failures yet.
That being said, I do know from my inference skills that the specs aren't where they're supposed to be.....Otherwise Bernard probably wouldn't offer an inspected and better package.
My take is, if you're a machinist, you can get away with buying the cheap ones and straightening them out to your liking, but I'll guarantee they're cheap for a reason.
Edelbrock heads are expensive, and not "spectacular" out of the box. Just regular ol' heads to drive with.
If something is truly great, It'll bring money, if it sucks, It'll be cheap. Common sense to me.
Edelbrocks cost more money, and they're middle of the road so to speak if you just unbox them and bolt them on.
That being said, I do know from my inference skills that the specs aren't where they're supposed to be.....Otherwise Bernard probably wouldn't offer an inspected and better package.
My take is, if you're a machinist, you can get away with buying the cheap ones and straightening them out to your liking, but I'll guarantee they're cheap for a reason.
Edelbrock heads are expensive, and not "spectacular" out of the box. Just regular ol' heads to drive with.
If something is truly great, It'll bring money, if it sucks, It'll be cheap. Common sense to me.
Edelbrocks cost more money, and they're middle of the road so to speak if you just unbox them and bolt them on.
I guess the best method is to buy Procomps bare for about $800.00 bucks then be a smart shopper and get a deal on quality valves and springs. The same could be applied to finding a set of bare eddy's and doing the same thing.
Everyone knows Ka heads rule the iron world any way.
. It would be nice if they offered a direct bolt on Alum head for SBO Olds, but when I ponder that thought I come to the conclusion that it may be just a waste of time for aluminum heads on a gas 350 block.
Last edited by 815Cutlass1972; February 4th, 2014 at 04:06 PM. Reason: Forgot a word
February 4th, 2014, 04:01 PM
#203
Seasoned beater pilot.
Join Date: Jan 2007
Location: Chicago
Posts: 5,468
here----> https://classicoldsmobile.com/forums...mp-teaser.html
February 4th, 2014, 07:02 PM
#205
Registered User
Join Date: Mar 2012
Location: Quad cities Illinois
Posts: 714
Procomps were not available when i got my heads done. If i knew the first thing about how to read plugs and tune a carb im sure i will get my 11 sec slip. My plan for this summer is to work on tuning. Anyone know of a good book or article on plug reading?
February 5th, 2014, 03:10 PM
#207
Engine Builder
Join Date: Jan 2010
Location: Louisville, ohio
Posts: 552
[QUOTE=cutlassefi;650308][QUOTE=Smitty275;650285]Not gonna happen very easily. For love the valve reliefs are totally wrong. SBC valves are at a 23° angle. Ours are at a 6° angle. Valve placement in the cylinder is totally different as is the combustion chamber. You'd be doing a lot of modifying of the dome to make it work and would most likely end up with holes in it some where. Most domes are hollowed out underneath to reduce weight.
You and I have had this discussion before. With all due respect, unless you have lifts of .700 or more and on a very tight lobe sep this isn't an issue.
I know this to be a fact. I used a SBF piston in the last DX I did. With .610 lift and 234@.050 on a 108 I still had .240 piston to valve clearance at tdc overlap. That's more than plenty.
However you are correct on the dome position. Chances are you'd need some work there and that could get costly, if the piston could even take it.
He asked about a SBC domed piston and that is what I answered to. Flat tops are another story which wasn't included in my reply since it wasn't pertinent.
You and I have had this discussion before. With all due respect, unless you have lifts of .700 or more and on a very tight lobe sep this isn't an issue.
I know this to be a fact. I used a SBF piston in the last DX I did. With .610 lift and 234@.050 on a 108 I still had .240 piston to valve clearance at tdc overlap. That's more than plenty.
However you are correct on the dome position. Chances are you'd need some work there and that could get costly, if the piston could even take it.
December 22nd, 2014, 11:06 AM
#208
Registered User
Join Date: Dec 2014
Location: Cranbrook, BC
Posts: 3
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