So I recently purchased a 1992 Civic CX hatch with a JDM B18C swap. The swap is for the most part stock with the exception of a generic CAI and a 2 1/2" custom bent exhaust to a borla muffler, oh, and a 2 1/2" carsound cat. The ecu has all stickers removed but has "1994 civic cx ssp" written on it". Vtec engages at 5000rpm and from what I was told its some custom chip thats supposed to be like the spoon sports chip? So here is the dyno chart, being a JDM motor I wouldve expected higher numbers, or is this pretty normal? Obviously my A/F is messed up and I need to do something about that, so any suggestions would be great as well. Thanks!

 

that af map is all kinds of whack

 

Fix the A/F and that will help out quite a bit. Have you done a compression check/leak down test?

 

No I have not, is there a link that explains how to do that exactly? I will go to autozone after work and get a compression tester, i think they have the ones that screw into the spark plug hole. Do I just crank the motor while thats in there?

Also, what should the numbers be?

 

http://www.c-speedracing.com/howto.php

this will help

 

Awesome link, thanks a lot. I will do the test tonight and post the results.

 

Cool

 

OK, I wasnt able to get the compression tester tonight, so I will do it this weekend. Apparently my ECU is a big issue, so heres the big question. Im going to be building the motor and shooting for around 225 whp. So what should I do for management? Should I just pony up and get a new ecu and get hondata or would a chipped ecu with vafc support my goals??? I'm new to the N/A game so please explain your reccomendations. Thanks!!!!

 

Your Air/fuel ratio should be inbetween 13 and 14.

If you dont have a VAFC or hondata - Id recommend getting one and leaning out your 6700-8000 rpm.

Yes the baselines seem kinda low

I put out 170 with a bone stock h22

Check the compression and then work from there

 

Well, instead of comparing an H22 to a B18C-R, lets compare the same engine. I have a 96 JDM ITR swap in my 92 CX. The baseline, completely stock was 179whp/128wtq, on a p.o.s. b16 ecu.

It sounds like you have plans to mod this engine in the future, so look into getting Hondata or some other EMS. You will be able to tune your setup as you change mods. 225hp all-motor, although more common now-a-days, is still a serious set-up and you need to be able to control the parameters.

 

Better exhaust with header will bring you some nice HPs.

 

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Just to make sure we're all on the same page in the same book, could you please make sure we know what kind of Dyno you're using?

On a typical Dynojet, just so you know, a typical B18C5 (USDM), completely stock, will put down 155-162 HP.

On the same Dynojet, it would be easy to get it to 180 with typical but well considered bolt ons.

 

Good point, it was on a dynojet. Thanks for all the replies, so is hondata pretty much the standard for N/A?

 

Hondata is an excellent fuel/ignition management system. But you have to find a tuner with the necessary hardware and software unless you want to but it all and tune yourself. VAFC is easy to tune, but somewhat inferior to Hondata in that is manipulates MAP values instead of rewriting your fuel and ignition values on a chip.

But as far as the graph goes, it looks like you need some fuel between 3000 and 6500 and lean out from 7000 and up. A/F's in the 11's is not a good thing for an NA car.