EG6-SiR

Currently I'm running a stock B18C1 in my jdm sir hatch, but it just ain't making enough power to please me anymore.

I've acquired another B18C1, and I plan to build it up to a little bit higher spec. I'm not looking for a full-on forged bottom end, just something thats going to push some higher numbers...

My current bottom end options are:
1. GSR block with LS crank, rods, and some ITR pistons (apparently PCT's are a no-no with this setup?)
2. Stock GSR block with some PCT's.

A couple of questions really.
- Which bottom end has more potential?
- Is the b20b crank the same as the b18b one?
- Is the LS crank option going to be worth the hassle?

red_honda_racer

First of all, how much horsepower do you want? Cause I can tell you some good ways to build that gsr for any setup. I have the same motor in my si hatch.

EG6-SiR

I can't really give you an exact figure (hp figures vary from dyno to dyno anyway...). Obviously more is better... Ideally I'd like at least 20-30hp above the gsr, but I'll take as much as I can get without blowing megabucks in the process.

I'm based in new zealand, making access to jdm parts easy, but usdm parts (je, crower, etc) hard.

clint g

iTrader: (1)

the ls crank needs to be worked over balanced etc.
sleeve the block bore it to 84mm
work the head with good cams

killer in the making

EG6-SiR

I was under the impression the crank would be a bolt-in job (maybe a micropolish or something but nothing too excessive)? Only the rods needs to be modified slightly?

And i'm not 100% sure about bearings? acl, b18b, b18c?