stick shift piston to head clearance?

acme383 · 01-28-2013, 11:53 AM

Is .040 ok or should i put a thicker head gasket on it. zero deck motor.

Bob Gullett · 01-28-2013, 12:01 PM

Type of engine? Piston to wall clearance? Class?

Aubrey N Bruneau · 01-28-2013, 04:28 PM

Piston weight ?
RPM ?
Stroke length ?
Steel or aluminum rod ?
! !

With 720 gram bare piston, I run .036" , to 7400... no issue.

mtkawboy · 01-28-2013, 06:33 PM

We ran .050 on a 68 Camaro Z/28 stocker back in the early 80s. Those were the stock piston rule days. We wouldnt have if we could have cut the valve reliefs

randy wilson · 01-29-2013, 11:57 AM

Plenty with steel rods, no matter the rpm.

acme383 · 01-29-2013, 12:00 PM

I don't have all the specs,but it's a 540 mopar with 4.500 bore and 4.250 stroke and uses a 7.100 steel oliver i-beam that i spin to almost 8000 rpm.

Rory McNeil · 01-29-2013, 01:48 PM

Since this is obviously not a Stocker engine, why not cut deeper eyebrows for piece of mind?

acme383 · 01-29-2013, 04:32 PM

Quote:

Originally Posted by Rory McNeil

Since this is obviously not a Stocker engine, why not cut deeper eyebrows for piece of mind?

piston to head.

randy wilson · 01-29-2013, 05:14 PM

40 is fine. For piston to head, that is.

mtkawboy · 01-29-2013, 05:27 PM

Sorry, I misread it too. We ran .035, I wouldnt run less then .030 but some do

01-28-2013, 11:53 AM	#1
acme383 Junior Member Join Date: Mar 2005 Location: chitown Posts: 55 Likes: 0 Liked 0 Times in 0 Posts	stick shift piston to head clearance? Is .040 ok or should i put a thicker head gasket on it. zero deck motor.

01-28-2013, 12:01 PM	#2
Bob Gullett VIP Member Join Date: Mar 2002 Posts: 1,106 Likes: 57 Liked 504 Times in 116 Posts	Re: stick shift piston to head clearance? Type of engine? Piston to wall clearance? Class? __________________ 68 Chevy11 327 F/S

01-28-2013, 04:28 PM	#3
Aubrey N Bruneau Member Join Date: Sep 2003 Location: South Eastern Alberta, Canada Posts: 311 Likes: 6 Liked 7 Times in 3 Posts	Re: stick shift piston to head clearance? Piston weight ? RPM ? Stroke length ? Steel or aluminum rod ? ! ! With 720 gram bare piston, I run .036" , to 7400... no issue. __________________ Aubrey N Bruneau 6409 C/S 62 BelAir sport coupe, 409 HP 409

01-28-2013, 06:33 PM	#4
mtkawboy Member Join Date: May 2003 Location: Billings Mt Posts: 282 Likes: 183 Liked 54 Times in 18 Posts	Re: stick shift piston to head clearance? We ran .050 on a 68 Camaro Z/28 stocker back in the early 80s. Those were the stock piston rule days. We wouldnt have if we could have cut the valve reliefs

01-29-2013, 11:57 AM	#5
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 22 Times in 22 Posts	Re: stick shift piston to head clearance? Plenty with steel rods, no matter the rpm. __________________ don,t have one

01-29-2013, 12:00 PM	#6
acme383 Junior Member Join Date: Mar 2005 Location: chitown Posts: 55 Likes: 0 Liked 0 Times in 0 Posts	Re: stick shift piston to head clearance? I don't have all the specs,but it's a 540 mopar with 4.500 bore and 4.250 stroke and uses a 7.100 steel oliver i-beam that i spin to almost 8000 rpm.

01-29-2013, 01:48 PM	#7
Rory McNeil VIP Member Join Date: Jun 2007 Location: from Vancouver BC Canada, now in Nova Scotia Posts: 1,311 Likes: 317 Liked 1,103 Times in 301 Posts	Re: stick shift piston to head clearance? Since this is obviously not a Stocker engine, why not cut deeper eyebrows for piece of mind? __________________ NHRA 6390 STK M/S 85 Mustang

01-29-2013, 05:14 PM	#9
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 22 Times in 22 Posts	Re: stick shift piston to head clearance? 40 is fine. For piston to head, that is. __________________ don,t have one

01-29-2013, 05:27 PM	#10
mtkawboy Member Join Date: May 2003 Location: Billings Mt Posts: 282 Likes: 183 Liked 54 Times in 18 Posts	Re: stick shift piston to head clearance? Sorry, I misread it too. We ran .035, I wouldnt run less then .030 but some do