dominojd said:
My ques to the SR20 guru's is:
According to ITS rules you can Port match the manifold and head and bore the cylinders .040. Will this make a big difference and is it worth the cost? I'm trying to do ever legal thing to see if the SE-R can actually be competitive in ITS.
Joe, if you are going to pull the engine out of the car (you aren't going to replace the pistons with the engine
in the car), then definitely take the time and effort to port match. It's not hard to do. It just requires some patience and some good grinding wheels. Regular stones just gunk up when grinding aluminum. I did gasket matchin on my DET myself. First time I have done something like that. Just have patience.
Bruce is right. Just do
everything legal you can think of if you are building an engine. I would spend the money to have someone balance it to a much tighter spec than you normally might. Why? Because you can do so little to these engines that I think this could make just enough difference.
I think a really really good 5 angle valve job would be key to getting max power out of these engines. Valve jobs have to be within FSM spec, but the FSM specs out 5 angles and has some slop in the specs IIRC. I also believe you can blend the seat into the head. Have this done as well.