In regards to changes its a case of how deep are your pockets
dbilas do a nice inlet manifold and cam package that adds 28 bhp (giving a
claimed 164 bhp on a healthy donk. although it is certainly not cheap
around the 1400 pounds mark This is what i will be going for next on my
own ecotec. but there are plenty other options available for tuning the
engine.
what kind of budget are you looking at
on a cheap end i would give it a ruddy good service get a decent cat back
exhaust and a panel filter to aid the breathing if you shop around and go
for a second hand exhaust system you could do this for under 200 easily
next step is where it gets trickier as you could take any path really.
headwork would give a good overall gain but will be expensive if you
aren't willing to do yourself
cams would be a great way to complement the headwork and can provide a
good gain on their own although dont expect to see the gains to be any
more than 5-6 bhp on a stock lump while keeping it driveable
Dont bother removing the EGR setup on the ecotec it doesnt affect power
output in anyway as long as its working correctly
decent exhaust manifolds are hard to come by with lexmaul being one of the
very few companies offering one for the ecotec and theirs being over 300
quid ouch, you could always go down the same route i'm taking at the
moment of a C20XE redtop manifold cut and welded to the face plate of a
standard ecotec manifold voila cheap and cheerful 4 branch although dont
expect any serious gains from this alone.
