Yo. Since the GSr motor went in 2 weeks ago in my civic ive had no complaints....except the GSR intake manifold. Its ugly, it cramps the engine bay, sits too low, plus ive heard that a b16a1 intake manifold outflows the GSR. Well, ive been thinking about geting a b16a1 head/IM and finally the opportunity has come up. Turns out my head gasket leaks oil, so while im tearing the head off i might as well swap a b16 one on. A local shop has agreed to trade me a b16a1 head for the GSR. (no cam trade) Im thinkin this is perfect. true/false: b16 heads flow better and yield higher c/r? true/false: b16 IM's flow better? Everything should bolt right in correct? PLus this will also be a good time to install my ITR valve springs and cams. Is there anyway to cahnge those springs without a press? Like a hand tool i can use? thanx.

 

i say get the b16 manifold put the cams form the gsr in the b16 head and bolt it up and that should be good to gomight as well replace your cam seals as ewll too

 

wait wont the R cams be better than the gsr cams?

 

i would rather just do a skunk manifold with b18c1 head

you'll loose compression if you go with a b16 head.
someone did a flow test on the gsr head vs b16 head in the forced induction forum. i believe hte gsr head outflowed the b16 head on the intake but b16 out flowed on exhaust.

if you just do a straight up swap you'll loose power due to loss of compression.

 

The b16 head loses compression. Therefore, go with a thinner head gasket while your at it, as well swap to a skunk2 manifold. Then use your ITR stuff in the head. This should be good for you. Goodluck.

 

From what i know the gsr heads flow better than a b16a head.If i was you i would just buy a skunk2 manifold and use your itr cams and your set.Your head is worth alot more than a b16a head,depending on the year of the b16a.Most likely it would be a first gen b16a.