4kq engine mods

[Aaron Sherrick]

Yeah, this has been beaten to death and beyond, I know.  I read through
the archives but still have a few questions.  I'm looking to get as much
performance from my I5 NA as possible with as little investment as
possible (since I want to do a turbo upgrade in a year or two).  I
already have a Stebro exhaust installed with the timing advanced and
just picked up a MC/NG cam (thanks Chris Semple!).  When the cam goes in
I'm going to replace the lifters as well.  I've recently seen talk of
stiffer valve springs as a possible upgrade.  I don't want to get into
porting and polishing the head because of the expense.  The only other
thing I can think of is a K&N air filter which doesn't sound like it
does a whole lot.  Does anybody have any positive experience with one?
Would a free-flowing cat make much of a difference?  My guess is no.  Am
I missing anything?  Thanks!

Aaron
'86 4kq
www.lehigh.edu/~amsk