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Author
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Topic: (PTV) piston to valve clearance
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1fastmach1
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Member # 10137
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posted
 
 
just got my new heads came with 2.110 valves so i clayed the pistons with playdoe and set my valve lash at 0 and rotated motor over and checked had .094 on the intake and .086 on the exhuast is that good or need more clearance its a sbf windsor solid roller
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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wilit
Mustang Messiah
Member # 3367
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posted
You generally want a minimum clearance of .080" on the intake and .100" on the exhaust. Some cam manufacturers say .100" on the intake and .125" on the exhaust. Either way, your exhaust side looks a little tight. You could either use a notching tool like this, or if you're running 1.7 ratio rockers, you could drop down to 1.6's.
You might be able to advance the cam to gain clearance. Advancing the cam will increase your exhaust clearance but decrease your intake clearance. Normally 1 degree will gain you .010" of clearance. So in your case you could get your intake to .084" and exhaust to .096". That'd be close, but finding a timing set that will advance or retard in 1 degree increments is going to be expensive. Most timing sets advance or retard in 2 or 4 degree increments.
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"If a man hasn't found something worth dying for, he isn't fit to live." - Martin Luther King Jr.
Posts: 4793 | From: 37.78514° North 122.40100° West | Registered: Oct 2003
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[SHO]TIME
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Member # 8962
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posted
did you have your head torqued on with a gasket installed when you took those measurements?
Posts: 631 | From: marin | Registered: Feb 2009
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1fastmach1
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Member # 10137
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posted
yes head was torqued down and already running 1.6 ratio rockers so thoose specs are to tight you think changing head gasket thickness hould work also right
[ 2016-10-18, 12:42 PM: Message edited by: 1fastmach1 ]
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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wilit
Mustang Messiah
Member # 3367
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posted
You can stack an MLS gasket to get some extra clearance, but it's not something I personally would do. The extra .020" you'd need will lower your compression ratio. Not by a lot, but for example, if you had a 9.3:1 with a .039" gasket, you'd bump down to an 8.9:1 with a .059" gasket. More importantly though, you create a greater chance of blowing out the head gasket.
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"If a man hasn't found something worth dying for, he isn't fit to live." - Martin Luther King Jr.
Posts: 4793 | From: 37.78514° North 122.40100° West | Registered: Oct 2003
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1fastmach1
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Member # 10137
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posted
ok well used a .043 mls head gasket from fel pro and now have .100 on the intake and .090 on the exhuast think that will work any thoughts or still to tight have brand new valve springs and will change every off season
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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