It's been my understanding that the B16 head flows better and is prefered over the stock B18C1 head. This being the case, yoou fellas think it'd be worth while to swap the heads on my GS-R's? I'm selling the '93 anyways, so I could swap the B17A head into my B18C1 ad swap the cams back so I'm running B18C1 cams in a B17A head. What do you all think? BTW, I know my B18's head is a P72, what's the head code for the B16/17 head? I ask because my 93 is not here right now for me to look at, thanks..


[Modified by VTC_CiViC, 12:58 AM 9/23/2001]

 

Why don't you just PnP the B18 head ? It'll cost less than the B16 head and prolly flow better than a stock B16, plus the B18 is MADE to flow for a 1.8L block and the B16 is MADE to flow for a 1.6L block, yes, the stock B16 has better flow capability... (check out a type R !) than the B18C1/B17 heads,
but unless you can afford to PnP the B16 as well, why not stick with the B18/17 head ?

 

from what I remember, the b17 was basically a b16

 

That would be incorrect. A B18C head flows better than a B16 head.

 

Really? I've always been under the impression the B16 head flows better than a B18 head, which is why Honda used it on the ITR, I mean it'd make sense. But assuming I'm wrong, why does Honda use a B16 head on a B18 block for the ITR?

 

the ITR head is not a B16 head...maybe at one point, but its been ported and polished which makes if flow totally different...

you will also loose compression if you switch to a b16 head

 

isn't the ITR head just a ported and polished B16 head with upgraded valve train.

 

Thus the ITR head IS a B16 head, ported and polished yes, but a B16 head none the less. Must be a valid reson why Honda just didn't P&P the P72 rather than switching to a modded B16A head.

 

BTW a B16a head is a B17a head. Exactly the same.

The code for a B17a is PR3.

Also, you can't argue that the B18C flows better of the B16a flows better (and claim it's fact) without giving some sort of proof. I won't argue the inverse, but the ITR would've used a B18C1 head if it flowed better. It could have been to save money in the long run, but that would be surprising.

 

The B16 head 'flows better' than the B18 head means that the flow of mixture is smoother and faster than a B18C1....

Yes, the B18C1 flows more mixture (1.8L) than the B16 (1.6L), but the B16 is a more efficent head pound for pound....

A properly done PnP job will enhance a head's original flow characteristics...

Proof ? I don't have any engine tolerence and measurement charts on me, but I am sure they can be easily found...


[Modified by X2BOARD, 7:10 AM 9/24/2001]