b16a head on b18c block

[wynode]

I've often read that the b16a head flows better than the stock B18C head and was wondering if anyone had any articles comparing the two.

I'd like to see just how much more is to be gained from the b16a head.

[tanghy]

more compression than c2 head
more flow esp at high rpm with single runner setup

[TODA AU]

Hi…
You might like to look here...

http://www.alaniztechnologies.com/techarticles.html
http://www.alaniztechnologies.com/marcharticle.html

Also, for what it’s worth, don't just consider a head swap alone...
The resulting compression drop would cancel any performance gained through improved flow.
A B16A cylinder head will not increase the compression of a B18C2
The B16A head added to a B18C (Non Type R) will actually lower the compression as it has an open combustion chamber. The chamber found in the run of the mill B18C is a closed chamber design.
Plus the B18C2 engine also comes with flat top pistons.

Regarding high rpm flow,
The B16A head has a low port that offers better low to mid rpm performance than the high port of the B18C2.
Though the B16 head flows more at almost all lift values.
The higher port angle of the B18C2 head benefits flow into the cylinder at high rpm.

[bigpitty1]

I have seen b16 head put onto a b20 block making around 250 hp at the flywheel, but this does run aftermarket cams and valve springs and a new exhaust.

[Jdm Oz]

I have seen b16 head put onto a b20 block making around 250 hp at the flywheel, but this does run aftermarket cams and valve springs and a new exhaust.

Yup, and a whole lot more work too.

[CIVIC-R]

Putting the b16a head on the b18c block will give a low compression ratio of around 9.8:1. Which is a low compression ratio, unless u are goin turbo. so to get the full benifit of using the b16a head on the B18c block, u need to put some higher compression pistons and a thinner head gasket.

I am doin this now to my hybrid... and it is quite a big job.... and honda AUstralia lacks on supplying alot of parts. so im still waiting for parts from japan.... very fustrating!

[tinkerbell]

OT - Honda parts fom japan should only take 10 days...

[TODA AU]

OT - Honda parts fom japan should only take 10 days...

Assuming they're available & in stock...
Which is not always the case...

[ginganggooly]

OT - Honda parts fom japan should only take 10 days...

Assuming they're available & in stock...
Which is not always the case...

... i once needed a new ignitor module. 6 week wait for one from the dealers.

which is why my car is trundling around with some immitation unit courtesy of some local manufacturer.

[CIVIC-R]

i waited 6 weeks for a set of bearings... Damn! things always takes ages when it comes to cars...

although raising the compression with pistons and head gasket on my B16/B18 hybrid made a big difference... even tho my car was off the road for weeks.

have many other ppl on here done this hybrid swap:???

[wynode]

I know at least one...........but lets start a new thread for that CIVIC-R

[pkn-xtc]

The combustion chamber volume of the b16a is slighty larger than the b18c2 but same as the type R's b18c5. The difference in combustion chamber volume accounts for the loss in compression from 10.6:1 (standard b18c2) to 10.4:1 (b16a/b18c2) not 9.8:1.

The b16a head is the exact same as the b18c type R head, except for having a different valve train, a port and polish job and milder cams.

The bore and stroke of both the b18c (type R and non type R) blocks are identical. The only difference between them being their internals.

Thus, the b16a on a b18c block is essentially the same as a b18c5. With modification, a b16a/b18c2 motor is a cheaper alternative to a type R's b18c5 aka "a poorman's type R".