Stocker pistons...

[brent flynn]

Luckily, i have a very experienced machinist, in the Stocker world, doing my engine....Bill Smith, Muncie, Indiana... He has done several Pontiacs, in the past...and they have all set records...so, i think i will be ok... And, yea...i know ring seal is very important. Its amazing how different things are, between a cheap bracket engine, and a Stocker engine. Ive always wanted to do this, and i know its gonna be costly. That being said, i will do the best shortblock , that i can. I will build from it... Im sure i wont hit the #'s that the rest of the E and F cars are hittin, right off the bat, but, if it were easy, everybody could do it, right?
I appreciate all the feedback... Its guys like y'all, that can speed this process up, a ton, and not let guys like me, make too many costly mistakes...

[Dwight Southerland]

You should contact the McKinneys if you are close to Muncie.

[brent flynn]

They are good friends of mine... have known them most of my life... Unfortunately, Roy passed away in 2009... Mike still races(along with his son Marty), they dont run class anymore. But, their E/S bird(Truman's original car) sure ran good... Bill Smith(the guy thats doin mine)done some of their class engines... I grew up watching them run...

[Jeff Lee]

Which 400 are you building? I think you have a '68 Firebird so I think the one to build is the RAII. I know those '69's with the RAIV haul some serious MPH behind their tails! They get the clutch right and they will just about have the quickest in class.

[brent flynn]

Originally Posted by Jeff Lee

Which 400 are you building? I think you have a '68 Firebird so I think the one to build is the RAII. I know those '69's with the RAIV haul some serious MPH behind their tails! They get the clutch right and they will just about have the quickest in class.

Shoot, Jeff... i cant afford any Ram Air II stuff...hehe... im building the 330hp dport combo... E/SA natural... may add weight for ''F"... not sure yet...

[Todd Hoven]

The Ram2 is a good combo, the problem is the heads are almost impossible to find. When you do they are 2500.00 +. The D port combo is a good combo still.

Originally Posted by Jeff Lee

Which 400 are you building? I think you have a '68 Firebird so I think the one to build is the RAII. I know those '69's with the RAIV haul some serious MPH behind their tails! They get the clutch right and they will just about have the quickest in class.

[Tom Goldman]

Originally Posted by Jeff Lee

To be more clear on my prior post, I was specifically referring to the valve pockets ONLY on the JE pistons. And to be fair to JE, that was years ago (about the time that CP was new to our market) and JE may have fixed the issue. In fact, they may be cutting the ring lands with a laser by now. So ask.

I suppose the question to ask any piston maker is a) what are the control tolerances on the ring lands, and b) what defines the valve notch (or dome or dish as it may be)? There's a lot more to it as well. How is the skirt ground?
And some pistons will be perfectly legal yet yield a higher compression ratio.

Realistically, you should have your machinist order the pistons and ask all the questions. If he's an experienced engine builder and knows how to make power, let him do what he has to do. And you have to take into account bore diameter and ring package availability. I've spent upwards of $1200 on rings because they were a bastard size. Now that NHRA allows a larger bore size than in the past, it's worked out for me as I can now get something closer to the common 4.250". That will save a lot of money!

You gotta take it all in and I'd say the last consideration should be the price!
Ring seal...ring seal...ring seal!

Ring seal on a 4.25" AMC ! Good Luck !
Better have that block filled solid to the deck.
And yes I speak from experiance.
BTW JE is now owned by Weisco.

[Mike Taylor 3601]

Jeff,
I believe what you are talking about on valve pockets is on TRW pistons most of them the valve pockets are'nt machined they are made when piston is forged,so pockets vary in depth and location.They vary because they are there before rest of piston is machined.
Anyone that has ever flycut a piston w/pockets forged will tell you they are inconsistent for depth and location.
I'm sure JE or any other piston maker would'nt rely on a piston with forged valve pockets to locate there valve pockets,all that info is going to come from there programs that will have valve pocket locations,spacing etc.
Mike Taylor 3601

[DonatoEng]

Jeff, you looking for a 4.25" thick wall AMC block ?
I happen to have one of the original race blocks on the shelf.
John

[brent flynn]

Yeah, i havent seen a pic of any of these pistons... I wonder if the valve reliefs are all machined...?