View Full Version : Piston Clearance


rodsters
Dec 25th, 00, 01:55 PM
I currently have a 68 Camaro with a 350 bored .060 with stock stroke. Is there a standard distance between the top of the piston and the top of the block??

2-67 Camaros
Dec 25th, 00, 03:23 PM
Yes, while at TDC the piston should be .005 below the deck of the block.

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68 Corvette Roadster
427/435
4-speed, tri-power
Ralley Red/Tan
Both tops, off-road exhaust
67 Camaro SS 350, 4-speed
Ermine White/Red int, Black Top
67 SS Camaro (http://albums.photopoint.com/j/AlbumIndex?u=1277786&a=10561790)
67 Camaro RS 350, 4-speed, Marina Blue/Black int.
47,000 orig. mi.
67 RS Camaro (http://albums.photopoint.com/j/AlbumIndex?u=1277786&a=10561779)

pdq67
Dec 25th, 00, 06:42 PM
rodsters,

What 2-67 Camaros is saying is to shoot for a min. deck height dimension including the head gasket, of .035"/.045" for a steel rod engine. This will give best quench and help fight detonation and stuff like that.

Usually the composite gaskets compress to about .038" or so which with .005" more will put you at about .043".

Shims are different at about .018"/.022", so the piston can be farther down in the hole. IMHO. pdq67

big gear head
Dec 26th, 00, 08:25 AM
pdq67 is right. Any closer than .035 and the pistons may hit the head in the upper RPMs. Any farther than .045 and you loose performance due to poor quench in the combustion chamber. If you use a .038 thick head gasket (compressed thickness) then you should have +.003 to - .007 deck height.

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'69 RS/SS396 pro street
427/4spd/9"