DarkPhoenix

Hey guys,

I was lucky and got my 4th Gen prelude for dirt cheap, like FREE!! I needed a beater since my VR4 is getting too beastly to drive comfortably on the road.

Now, I want to turbo the 'lude. Nothing crazy, since I don't want to spend much money. It's an Si with the stock H23A1, engine and 5 speed.

I happen to have a 2G DSM manifold, Evo3 O2 housing and an Evo 8 FMIC.

Now the questions have arisen with fueling and engine management. I am a Mitsu guy, from the beginning, so the thought of a boosted aluminum blocked car, kinda scares me. I don't intend on building the engine too crazy, because I want to be able to put power to the, not turn my tyres into expensive black vapour.

For turbo I plan on using an MHI Evo 3 16G turbo, because of it quick spool, and the fact that I put down almost 350 whp at 19 psi in my Talon. The only thing that would leave would be engine management. I am going to be keeping the boost at about 6 or 7 psi, for the moment, so 450cc injectors should be sufficient.

Now my main question I guess, is would an SAFC be sufficient for should I just go with the Hondata. I am staying Non-VTEC, btw. Thanks guys.

Tom-Guy

That's because Mitsufeces experience isn't worth much.

H23 cranks = failure, they break like clockwork. H23 blocks are the same thing as the H22A1, FRM bores that don't like forgings. I don't like the coated Mahle pistons meant to drop in to FRM sleeves, the coating is fragile and as soon as it gets the least bit of abuse it dissappears and the engine comes apart. Further, the bottom oiller Honda engines aren't the most robust. Some people have had some good luck extracting power from H23 bottom ends, but frankly you have one of the worst engines with one of the weakest transmissions available, stuck in a heavy chassis that won't move terribly fast even boosted.

If you had a D16 or a B-series things would be a little different. With the exception of the CRV block, all D and B drivelines are robust.


AFC = failure. Welcome to advancing your ignition timing under boost - the LAST thing you want to do. Hondas don't have knock sensors that band-aid poor tunes like DSM do, even the Hondas equipped with KS don't use them when WOT as they are just for trimming ignition timing at part throttle cruise.

Hondata = sues it's userbase and it's freeware alternatives in order to attempt to dominate the market. You won't find much support for it here, and all of the pgmfi.org derived softwares available are either equivalent or better for LESS money.


PS - you are a n00b and it is considered HMT tradition to post an intro thread with pics of your car, a senence or two about yourself, and most importantly ****. Brace yourself for a lot of people being really really rude until you get the **** bit correct.

DarkPhoenix

Well, fortunately, I'm not a boosted noob. I've been building and running turbo cars since I was 15 years old ( BTW, I'm 31 now).

I have only blown up one car in my entire time with the mitsus, and that was a big FUBAR on my end ( Boost spiked to 25 PSI on a fairly stock 91 Talon that was tuned for 17 psi) and all it did at that point was blow the HG. My current Mitsu, is running great at 23 psi on a 50 trim, with 680s, VPC/GCC set up. I street tuned it using that with an LM-1 Wideband set up, set to 11.3 AFR.

As for the H23, I wasn't going to be making a beast out of it. If I wanted to build another fast car, sure as hell wouldn't be a Honda. This is going to be a car that will be entertaining, with some autox track time.

And Intro, My name is Craig, a 31 year old systems engineer who likes making cars faster than they should be. I have owned 6 turbo mitsus, 7 Nissans, 2 of which were turbo.

Money shots of the Galant.








The 'Lude





And of course, the pr0n!!

Yummy!!!

J-MAN

not sure if i like the beaver or would rather have a red X.

and good luck with the prelude and go with crome or uberdata for fuel managment.

DarkPhoenix

Fixed. The Beav is MUCH nicer. :-)

ifly87

Sharp car's, Just rock a nice hmt kit at a moderate boost level, you should be fine. AFC might be ok on those DSM's but if you want to do it right you'll chip the ecu and run crome.

Tom-Guy

Your **** is deficient, but it's almost completely offset by the fact you aren't a toolbag or an idiot. Welcome!

seerex

For the cheap a dsm mani, turbo and 450's will bolt up with a little effort.

b18.

Galant VR4's are one of the most awesome cars that Mitsu brought to America, since they didn't want to "fix" the Evo III GSR for 'Mericans.