C_WAKE

Can anyone explain the advantages and disadvantages of putting a B16head on a B18 Block compared to putting a b18 head on b18 block?

The real Ryan

B16 head flows 10% more air at a faster rate than the B18 head. However the B18 head's combustion chambers are smaller than the B16 head. resulting in slightly higher compression. Also, this belongs in Tech Talk.

Edit: The Type-R head has the best of both worlds.

Wii

B18A/B/C1/C5??? Which B18 ?

RPRacing

can you please show me some backup data or is this all just run of the mill forum rumors? I dont think you understand what 10% really is.

The real Ryan

I would expect you to have already known this from years ago. It's a fact that the B16/B18C5 ports are larger than the B18c1. This has been around since the late 90's. I have no idea who initially did the test but yes it was proven that the B16A head Flows 10% more air (cfm?) over the B18c1. And I do remember seeing some kind of proof back in the day. Look it up I'm sure you can pull the data sheets off the honda-tech archives. I don't really care enough to do the homework.

RPRacing

nope. that is 100% bs. if that were the case, if you take an 84mm built bottom end, and put them same intake mani, Tb, header, and all other parts the same and only change the head from a stock gsr to a stock b16, you would see 15-25 whp difference. obviously thats not the case. so therefore no way in hell.

I'm not saying one head isn't better, just saying its no where close to 10%.

The real Ryan

But what if the test was on a stock B18 bottom end? Without the extra compression ect. from being built. The gains wouldn't be close to 15-25whp so is it possible that those numbers could be skewed? Or am I thinking in the opposite direction here?

Chezkers

fuck B

Jarrod

</3 Chezkers.

Get either a gsr head or a b16 head for the cheapest amount possible. I don't see why people over hype this.

RPRacing

it may be no difference. airflow isnt the only thing or always the main thing that affects power. if the rest of the parts are small, then a head that flows much better will not do anything for power. the reason i stated built motor is that it will definately need as much flow as possible.

haha. no

absolutely correct.