putting a b16 head on a b18 block will lower compression by about .3

 

putting a b16 head on a B18????

It will yeild different c/r for each different series of the b18 block

 

yeah, you need to determine if its a B18c1 or not. if it is, then a reasonable turbo or SC setup should be pretty stable at 7-8 psi. a couple more than i usually recommend for a b-series turbo. thats a great combo. [sm=smiley20.gif]

 

Yeah, a B18C1. Sorry about that rather new to all this, I'll be a little more specific on that next time

 

Can someone please explain to me why it would be a "great combo"? What exactly is the difference in using just a B16a2 or a B18c1?

 

B is the series of the engine, series include B, D, H, K, ZC, ect.

the first number (b18c1) notes the size of the cylinder. so for example, the b18c1 is a 1.8 liter engine, the h22a is a 2.2 liter engine

the second letter is an alteration on the same engine.

(not sure about this part...) the number tagged on the end is a slight tweak or difference on the engine. like the b18c1, the b18c5, and the b18c are all different engines...but not too terribly. its mostly just compression and small stuff thats a little different

 

b16a has either 10.2 or 10.4:1 compression. b18c1 has 10.0:1. both pretty high for a turbo. if you put the b16 head on the b18c1 block, it will drop the compression ratio to about 9.7:1, which is a lot friendlier to a turbo. you can gain a pound or two of boost that way over using a full gsr engine. also, the b16 head flows slightly better than the gsr head.

 

Plus you dont have to deal with that dual plen. intake bs of the GSR

 

I hear ya. i hate that crap. of course Skunk2 and Blox have a nice cure for that as well

 

Also, a note about the engine naming conventions.

First letter is the series
First number is the displacement
Second letter tells you which engine it is

The number at the end is what the USDM manufacturers use to tell the closely-related (but not identical) engines apart. JDM engines don't use a number at the end. Thus, the B18C1 is the USDM GSR engine, while the JDM B18C can be either the SIR engine (basically a GSR on small-time steroids) or the mighty Type R engine variant (dubbed the B18C5 in the states).