b20a engine going for higher compression will be in a 89 4ws prelude.

little worried about hitting valves in my lude if I get slightly longer rods.
Im really trying to find out what it the longest I can go before I will hit.

I only have the block not rods yet so i cannot do a clay test thank you.

based on my math my piston will be dead flush with the top of my head gasket. and i know that the valve is open .010" at 5.5 degrees before TDC and open .020" at 8 degrees After TDC.

if i know that the bottom edge of the valves are more then .050" from head can i assume that I wont hit my valves.

 

can the mods change the title to "theory on if valves will hit" or tell how i can.

and no one has any import on this. I've talked to some people and it seams like it should work.

 

Clay the motor and check clearances. Nobody on the Internet can give you a solid answer.

 

1. Clay with stock rods.
2. Measure the clearance, then order rods to fit.
3. Clay again.
4. Profit

 

I would mill the head before I took the whole motor apart . . . ?

 

^^
this and/or change to a higher comp piston..

theres other ways to get power besides stroking.. and cheaper. Either way, a clay will be needed