.036 quench

[ventura74]

I've read a little about this in another post but wanted to start my own, what are everyone's thoughts on this? Specifically a Chevy 383 6500rpm motor good steel rods and a 4.060 bore .036 thick head gasket on a zero deck? I know it's kinda splitting hairs just trying to get compression where I want with what I have. Any info is appreciated, thanks.

[amc fan]

What is your piston to wall clearance? You are cutting it close.... I like .040 but you might be ok >Once carbon gets on top of pistons .....

[Adger Smith]

What type of head and where is the spark plug located?

[bigjoe1]

My sixty years of engine building has shown me that the extra close deck is worth NOTHING-- Whey do it ?


JOE SHERMAN RACING

[ventura74]

My sixty years of engine building has shown me that the extra close deck is worth NOTHING-- Whey do it ?


JOE SHERMAN RACING

OK fair enough just thought I'd run it past ya, I'll go with .040 or so, thanks. Will a 4.060 bore gasket be ok on a 4.030 bore? MlS gasket

[PackardV8]

My sixty years of engine building has shown me that the extra close deck is worth NOTHING-- Whey do it ?
JOE SHERMAN RACING

Joe, you'd know on high horsepower builds. I do know staying under .050" is worth doing when trying to control ping on lower horsepower, lower RPMs iron head street engines. Different horses for different courses.

[bigjoe1]

That Is what I have seen too. anything like 055 or less seems to work out very well. I never push to see how close I can get


JOE SHERMAN RACING

[Adger Smith]

There are combinations that "Bigger IS Better"

[dfarr67]

My 5.7in rod, 9.5:1 383 has piston .015 out of bore and .050 gasket thickness. We'll see how this works.

[turdwilly]

I ran a 4.040" bore 3.5" stroke SBF with the piston .005" out & a .043" compressed gasket for years with no issues. Shifted at 7200 but it hit the 8000 high chip many times on missed shifts before I swapped out the worn out toploader for a C6.

[Brian W]

I agree, in highish HP deals not worth chasing it. Run it .040 ish and let it eat!!

However, in a restricted engine, say a 2bbl. deal, it does have some benefit. I have run .030. you better have fairly tight piston to wall though. Piston will touch the head @ 7400. Just "helps" it turn around and go back down!! LOL