pistons

[Big_Boyz_Toyz]

What is the stock pin height on a stock 500 piston.

[Ted in Olympia WA]

Here you go, I hopes this helps.

http://www.beckracing.com/slvpg19.htm

TED

[dave_brode]

Big_Boyz_Toyz,

1.910", iirc.
Dave



"]What is the stock pin height on a stock 500 piston.[/quote]

[MilesO]

Ted,
Thanks for the useful link.

Miles

[dave_brode]

Miles/All,

Realize that most aftermarket pistons are normally 10-20 thou shorter than oem pistons. Note that the silvolites are 1.882"/1.883", whereas the KBs are 1.900", which is the tallest non-oem that I've seen. The oem 500s that I measured were 1.910", iirc.
Dave

[MilesO]

Dave,
Yes, I have noted the difference in comp. ht. between manufacturers..not comparing them to 'stock' since I am not going back to stock..but it would make a difference in compression for sure..thanks for the reminder. Your willingness to share your knowledge is also appreciated.

Miles

[dave_brode]

Miles,
Thanks. Esp when using the thicker Cortecos, a taller pistons would help.
The piston down the hole will make the engine ping prone. Most experts say that quench in the 60-100 thou range is very bad. Even with oem pistons and thinner Felpros, the block will need a little whacking.
Dave




O"]Dave,
Yes, I have noted the difference in comp. ht. between manufacturers..not comparing them to 'stock' since I am not going back to stock..but it would make a difference in compression for sure..thanks for the reminder. Your willingness to share your knowledge is also appreciated.

Miles[/quote]

[MilesO]

Dave,
What would you feel is a safe minimum quench dimension piston top to head regardless of the gasket used ? 5000 rpm max, 7" Olds rod , forged piston w/28.5cc dish, small chamber head.
Thanks
Miles

[Andy V]

Don't want to answer for Dave, but I would say .035" as a min.
I'm building a motor now with Corteco's and I left the piston .003 out of the hole. Should have clearance to the head around .047"

I'll probably spin this to 5500-5800

[dave_brode]

Andy/Miles,

I agree that .035" should be safe, but fwiw, I'd shoot for .040"-.045".
Some experts claim that a too tight quench can cause quarks in the combustion process too. On the other hand, I'd much rather have .035" than .075".
Dave



Don't want to answer for Dave, but I would say .035" as a min.
I'm building a motor now with Corteco's and I left the piston .003 out of the hole. Should have clearance to the head around .047"

I'll probably spin this to 5500-5800

[cadillac512]

Hey Dave...
What's a "quark"? I don't know if I want 'em in my combustion process...... :wink:

Terry

[~JM~]

I don't know what a quark is...

but I once worked with a carpenter from Boston once, who liked to round everything off to the nearest qwata.

~JM~

[STDog]

Hey Dave...
What's a "quark"?

Aren't the sub-atomic particles of some sort...

[MilesO]

I'm inclined to go with sub-atomic particle.. Google will know where to go to know fersur..

[MilesO]

Quarks

http://www.google.com/search?biw=780&hl=en&q=quarks

[DOC]

Wow. Dave B., I'm empressed. I thought for sure that Quark was a bar owner on the prominade deck of Deep Space Nine. I thought I had edumaction, hmm.. eddukation hmm.. edifkation hmm...oh hell, some good learnin', but, I missed that one.

DOC

[dave_brode]

Hi Terry,
Maybe is querk, or "weird thing that happens".

Sort of unexplained phenominom [sp?]. Part science, part black magic. If a bad quark occurs, the engine can become FUBAR, a bad thing. <grin
Dave


Hey Dave...
What's a "quark"? I don't know if I want 'em in my combustion process...... :wink:

Terry

[cadillac512]

Ahhh,yes....."Quirk" :D

I knew that's what you meant but just thought I might stir up a bit of trouble.As usual,the inquiring minds of CB7 did not disappoint! We even left the galaxy for a moment.... :!:
Terry lol

[dave_brode]

Hi Terry,

LOL. Yes, there are some fart smellers here.

Actually, I didn't even know there was such a thing as a "quark". I bet that one would probably cause the engine to be fubar quicker than a quirk.

Btw - encarta says: quirk = odd event.
Dave

Ahhh,yes....."Quirk" :D

I knew that's what you meant but just thought I might stir up a bit of trouble.As usual,the inquiring minds of CB7 did not disappoint! We even left the galaxy for a moment.... :!:
Terry lol