Widebodybuild

Hello Everyone!

I’ve bored out a 1988 3.2L to a 3.4L with JE pistons which are domed. I went with the 10.5 to 1 compression and I’m wondering if with the higher compression, if the pistons will have a larger piston to head clearance

I used the solder method to measure and the clearance and those solders measured 1.76mm at the thinnest part. In Wayne’s book he calls this deck height measurement, and it mentions the thickness of that solder should be around 1.25 to 1.5mm with this method. I did not put the cylinder gasket (shims) in as that would add another 0.25mm pushing me well over the recommended 1.5mm. And I’m guessing not running cylinder gaskets isn’t a good idea.

Does he mean piston to head clearance instead of deck height? Im wondering with heat expansion and the higher compression if I need that extra 0.25mm to 0.5mm from the 1.5mm Wayne recommends. Worried that with the extra space I’m going to lose quench, or if I can still achieve that higher compression

theiceman

i would say Pelican is the place to ask questions of this nature, they have a specific engine building forum over there and those guys are very knowledgeable about this stuff.

Widebodybuild

ok i'll cgeck in over there. thank you!