im about to be buildin a piston and rod set up ls vtec 10 to 1 compression eagle rods je pistons... 81.5 mm bore... i will be boosted what do you guys usually put yalls piston to wall clearance at.... and what ring placement and gap do you use.... my crank is fine ...so i should be fine with standard bearings correct... just getting different peopls opinions

 

Whatever JE says.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF &raquo;</TD></TR><TR><TD CLASS="quote">Whatever JE says.</TD></TR></TABLE>

Unless of course, you think you know better than the manufacturer that designed the piston. But then you are just rolling the dice.

 

I've been told by a very good source, that piston to wall clearance should be about 1.5/1000ths......good luck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JOE BD-0 &raquo;</TD></TR><TR><TD CLASS="quote">I've been told by a very good source, that piston to wall clearance should be about 1.5/1000ths......good luck</TD></TR></TABLE>

LOL...if you want to seize the piston to the sleeve...that would be ideal bearing clearance on a street car.

Piston to wall clearance will depend on a few things (Manufacture, piston size, application, ETC.) but you should always use the Job card that comes with the pistons and that will give you what the manufacture recommends but it's usually around .0035 to .004 thousands

Ring gap will vary depending on builder and application but I personally like to run on low boost engines (28 psi max) .019 top ring and .021 lower ring and high boost engines (28-48+ PSI) .024-.025 thousands top ring and .026-.027 thousands on lower ring but this is not set in stone, everybody has there own opinions on whats good ring clearance.

I like to run a little looser than normal bearing clearances in my race and street engines when I build them.

 

what's boost?

 

Some gauge made by autometer.