I am going to run into a problem??
04-30-2007, 10:48 AM
#1
I am going to run into a problem?? I'm doing my heads and cam install (ASA Cam, milled 241 heads) and i was looking at the difference in my new milled 241 heads, compaired to the stock 806 heads.
i had the heads milled .028 and i will be using the GM MLS gaskets (.060).. the lift on the cam is only .525..
am i going to run into the valves hitting the pistons??? only reason i am asking is because when i compair the old heads to the new ones, I can see the combustion chamber is a lot taller on the old heads, compaired to the new ones...
granted the 806 heads were 69cc's.. my new ones are supposed to be 63cc's.
anyone see an issue?
i had the heads milled .028 and i will be using the GM MLS gaskets (.060).. the lift on the cam is only .525..
am i going to run into the valves hitting the pistons??? only reason i am asking is because when i compair the old heads to the new ones, I can see the combustion chamber is a lot taller on the old heads, compaired to the new ones...
granted the 806 heads were 69cc's.. my new ones are supposed to be 63cc's.
anyone see an issue?
04-30-2007, 01:30 PM
#4
Originally Posted by RGKSR
I would check PTV clearance anyway. It's not that hard to do.
If you have extra room you might want to go to a thinner gasket.
Bob K.
If you have extra room you might want to go to a thinner gasket.
Bob K.
04-30-2007, 09:04 PM
#5
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There are two basic ways to do it, both are pretty easy. One is to just put some high quality modeling clay on top of the piston, bolt on the head and rotate the motor 720 degrees, (by hand!!!), the other requires a dial indicator and a mount with the indicator resting on the rocker arm. Search it out there are some great write ups on here about it.
The lift of your cam has very little to do with PTV clearance. The duration is what causes problems... I didn't see the duration listed but I doubt that a cam with .525 lift has too much.
The lift of your cam has very little to do with PTV clearance. The duration is what causes problems... I didn't see the duration listed but I doubt that a cam with .525 lift has too much.
05-01-2007, 10:47 AM
#6
Originally Posted by chuckyt1
There are two basic ways to do it, both are pretty easy. One is to just put some high quality modeling clay on top of the piston, bolt on the head and rotate the motor 720 degrees, (by hand!!!), the other requires a dial indicator and a mount with the indicator resting on the rocker arm. Search it out there are some great write ups on here about it.
The lift of your cam has very little to do with PTV clearance. The duration is what causes problems... I didn't see the duration listed but I doubt that a cam with .525 lift has too much.
The lift of your cam has very little to do with PTV clearance. The duration is what causes problems... I didn't see the duration listed but I doubt that a cam with .525 lift has too much.
cam is the ASA GM cam.. 226/236 .525/.525.. heads milled to 63cc's.. gaskets are .060 GM MLS gaskets.