This year I'll be starting my Diploma In Apllied Technology (Automotive Engineering) course, and one of our projects is to take an engine apart, fix it up, etc.
I was thinking about building a B20A to use in my Prelude. I currently have a B20A 12 valve SOHC in my car, and was thinking about building a B20A 16 valve DOHC.

I'm not 100% sure if I'll do this yet, it depends on a few things such as money (got a student loan tho) and how much power I'll get out of it.


I've done some estimating of how much power I can get, just wondering if it's correct or not.

B20A 2.0L DOHC, 145HP
New conrods, pistons
Bore it from 81mm to 86mm -> 10% increase in displacement
160HP
Increase compression from 9.4:1 to 11.5:1 -> 16% increase in HP
185HP

86mm is getting on the high side, but I read a web site which said it's possible on a B18A block, which is the same as a B20A block.
If it is too high, here are some figures for 84.5mm and 85mm size bores:
84.5mm 2.13L
85mm 2.15L

EDIT: Had the wrong HP values in there.


[Modified by ryanstev, 12:56 AM 1/1/2003]

 

Bump.

Just want to know if increasing the displacement by 10% would give 10% more power.
Also, want to make sure a B18A is the same block as a B20A, since that's what I got my figures for boring from.