piston to valve
Thread Starter
2nd Gear Member
Joined: Feb 2007
Posts: 403
From: Ohio
piston to valve
what is the whole process in checking this. im goin to have a shop do the swap with my pi swap i have comp 274-H cams and ported pi heads but what if the clearance is too close?
5th Gear Member
Joined: Nov 2005
Posts: 4,412
From: MN
RE: piston to valve
Well I'm not sure if this is the "most approved way" but this is how I did it. I bought some play-doh and flattened it out and placed it on top of the piston. Then I torqued down the heads with the old bolts and set up the timing and turned the engine over a few times. Then I unbolted the heads and measured the thickness of the play-doh where the valves hit it with a micrometer. I can't remember off the top of my head what the measurements are suppose to be though.
Thread Starter
2nd Gear Member
Joined: Feb 2007
Posts: 403
From: Ohio
RE: piston to valve
ok! im curious to know if my cams i got which are comp 274-H cams will be ok with my engine its a 96 engine getting a pi swap and the heads are ported and it has stainless steel prowflow valves
5th Gear Member
Joined: Aug 2007
Posts: 2,445
From: Jersey
RE: piston to valve
ORIGINAL: amoosenamedhank
Well I'm not sure if this is the "most approved way" but this is how I did it. I bought some play-doh and flattened it out and placed it on top of the piston. Then I torqued down the heads with the old bolts and set up the timing and turned the engine over a few times. Then I unbolted the heads and measured the thickness of the play-doh where the valves hit it with a micrometer. I can't remember off the top of my head what the measurements are suppose to be though.
Well I'm not sure if this is the "most approved way" but this is how I did it. I bought some play-doh and flattened it out and placed it on top of the piston. Then I torqued down the heads with the old bolts and set up the timing and turned the engine over a few times. Then I unbolted the heads and measured the thickness of the play-doh where the valves hit it with a micrometer. I can't remember off the top of my head what the measurements are suppose to be though.
5th Gear Member
Joined: Nov 2005
Posts: 4,412
From: MN
RE: piston to valve
ORIGINAL: stangdriver2007
ok! im curious to know if my cams i got which are comp 274-H cams will be ok with my engine its a 96 engine getting a pi swap and the heads are ported and it has stainless steel prowflow valves
ok! im curious to know if my cams i got which are comp 274-H cams will be ok with my engine its a 96 engine getting a pi swap and the heads are ported and it has stainless steel prowflow valves
5th Gear Member
Joined: Nov 2005
Posts: 4,412
From: MN
RE: piston to valve
Well I'm not sure you're going to want to do what I did. I was in a hurry and did some afro engineering. Most people just have the pistons fly cut but I didn't want to wait that long so I came up with something else. I had a junk set of pi head laying around and I took the valves and sharpened and made cuts into them to make a cutting tools. Then I bolted down the head and put the valve into my drill and cut my own valve reliefs.... It worked but it's kinda ghetto.
Thread Starter
2nd Gear Member
Joined: Feb 2007
Posts: 403
From: Ohio
RE: piston to valve
yea i dont think im gonna have that done but as long as it worked. im thinkin about buying this kit that way i can run some more nitrous down the road since its all forged and i will have my block bored .020 over and thats what this kit is made for. http://cgi.ebay.com/ebaymotors/4-6-F...spagenameZWD1V