The b16a head actually flows better as well...if I'm not mistaken it's used on the B18C5

Shingo

 

B18C5 head = mildly ported B16A head Good for top end power. The B18C1 head works better in the midrange. The 2-stage intake manifold helps as well.

 

This is a myth. They flow almost identically to the GSR head, and with more volume of air the GSR actually flows better.

 

werd

 

Oh lord.

The B16A/B17A (PR3) head and B18C1 (P72) heads flow almost identically. The biggest differernce at any point on that graph is ~2.5 CFM which is completely insignifigant.

The PR3 head has a higher combustion chamber volume. This means that it provides a slightly lower compression ratio than the P72 head. Similarly, the Type-R motors use a hand-ported version of the PR3 head with their own intake manifold. The larger combustion chambers mean a larger surface area which in turn makes the head a bit easier to repeat the same port job over a production line. One could also argue that the PR3 head provides more generous "squish" area for high-CR running.

If you put a Type-R PR3 head on a flow bench I guarantee it would produce noticeably better numbers than a PR3 off a B16A or B17A.

Now I swear that I've typed this exact reply in any number of threads, even down to responding to dubster99's freakin flow bench graph. Geez people, yall aren't very creative at ALL.

 

Yeah, I could have sworn I've put up this graph more than once to prove the b16 head doesn't flow better than the GSR....

 

Whoops

I probably should've have mentioned "hand-ported b16a head on the b18c5".

My bad. Apologies for bringing up an old myth

Shingo

 

I'll whip out the old "no replacement for displacement" argument. No matter what you're going to do with an engine, more displacement is a good thing (especially when you're comparing two engines that are virtually identical).

 

okay, been gone for a while (like u missed me )
99-00 Civic Si 2612 lbs 15.7 1/4 mile stock
94-98 Teg LS 2643 lbs 16.1 1/4 mile stock
94-98 Teg GSR 2671 lbs 15.5 1/4 mile stock
Those Integras are HEAVY let me tell you...ANYONE thinking of putting a B16A into a HEAVY ASS Teg is stupid. 30lbs, gimme a break, I'll go run around the block for a few weeks, after looking at the curb weights everyone can eat me! All I've heard is how damn heavy an LS is and how slow it's going to be, BS. I'll do the swap, eventually get some times, and prove I'll make this sucka work!

 

So you're saying integras are not heavy?

If you are (and correct me if I'm wrong), I think you're making the wrong comparisons. Dig up some curb weight info on a civic hatch si/hx/etc. and see what you come up with. I guarantee the integra will look like porky the pig.

Shingo