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B18c5 INTO A 1991 CRX questions

Posted: Fri Dec 30, 2011 8:11 pm
by Johnnybomber101
I have scoured through the forum and I cannot find any answers!

I am going to be putting a b18c5 with factory LSD tranny into a 1991 CRX Si.

These are my performance plans:

Compression up to 11.5 to 1
Individual throttle bodies
Full MSD Ignition to include 6A Box
All internals refreshed
block guard
high pressure oil pump
4-2-1 Exhaust Manifold
Straight Through Muffler
lightweight flywheel
"racing" clutch <- still trying to narrow it down, there are just so many for Honda's!
Stock Type-R Tranny w/LSD

Plus all the frame and suspension work I have already started.

So, how can Hondata help me with tuning this thing and what do I need to get in order to do it? My ultimate goal is to make a seriously snappy N/A Monster that I can reliably drive on the road. I believe this set-up will allow me to do it, I just need help with the tuning.

Re: B18c5 INTO A 1991 CRX questions

Posted: Mon Jan 02, 2012 12:05 pm
by Spunkster
To use a Hondata system, you will need to use a compatible OBD1 ecu from the list at You can then use the Hondata s100 or s300 depending on what options you want ( I would recommend the s300.