I have a 97 prelude boosting 15 psi right now but Im only seeing 247 whp on the mustang dyno. Are these decent numbers for my setup and Im wondering how much further i can go on this setup? I saw the boosted faqs and saw others doing 13psi and getting over 300whp....wheres the hold up?
h22a4
port and polish
sleeved
turbo xs manual boost controller
8.5:1 pistons
aem cam gears
eagle rods
440cc injectors
vortech fuel management
walbro 255 fuel pump
hks bov
tial 38mm wastegate
fuel regulator
garrett t3/t4 52 trim
Apexi VAFC on p5m ecu (I know its oldschool, car was built a while ago. Thinking of obd1 conversion with p28 and hondata chip, opinions?)
FMIC with 2.5" piping
2.5" downpipe and exhaust with greddy sp muffler
Last edited by BstdPrelude; 05-06-2010 at 03:29 AM.
I would have to say its in the tune if the motors put together right. your injectors seam a little small to try for 300 plus at the wheels.
the mustang dyno i have heard reads a little low
The VAFC is a really, really ghetto way to run a turbo. That's definitely the problem right there. The VAFC Hack is an exceptionally bad idea, that was unfortunately popularized in the early 2000s by a lot of well-meaning people. Problem is that its unreliable and you won't make power with it.
Convert to a real EMS and you will be set.
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At least an S300. They're not really that expensive (although not cheap) but you need that kind of precision and tuning power when shooting for a 300+ hp number on this motor. And you injectors are definitely too small, even if you're at a lower altitude. I'm running 9 psi at high alt. on a JRSC and I'm at 80% duty cycle on RC 550ccs and making 240 hp. Also, at 8.5:1 compression, your dynamic compression is considerably lower than a 9-10:1 motor. While safe, you will need more boost to compensate for your safe compression level. Definitely invest in good management and tuning, and you will be pleased with the results. Good luck!
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1993 Civic DX w/ JRSC H22, 9 psi underdrive, Hondata S300, MSD Ignition, Koni adjustable/Skunk2 coilovers and cam gears, Competition V2 wheels with M&H slicks, and JDM washer solvent. 248 whp/236 tq, best 1/4 mile 13.2 sec. @105 mph.
okay, thanks for the response and advice. Off to buy new injectors
Also, with your experience in lower comp, what psi should be safe for 8.5:1 comp pistions? Im not quite sure what would be too high or too low for me to run
Last edited by BstdPrelude; 05-10-2010 at 11:03 AM.
I suggest 600-700cc injectors and a chipped ecu running ectune. Ectune is cheaper than hondata and it does the same job. Also get rid of the vortech fmu. It is a hunk of garbage. Just set the fpr to 45psi. You wil probably need a walbro 255 to provide more fuel.
Since everyone is making recommendations, here's mine:
Don't bother with Hondata or ectune. Neptune is better than all of them. Hondata I hate because the people who run the company are douchebags, and ectune I've never heard of. I know the guy that owns Neptune, and he's a very smart capable dude.
Price should all be pretty comparable. Neptune may be cheaper, but I haven't priced it out.
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I have been looking into neptune, the demon rtp chip and software, however im not too sure if my utner would be familiar with it. I also liked the idea of being able to have a dashhawk-like lcd monitor they offer as well.
get whatever your tunerknows the best. From an unbias point of view ectune=hondata=neptune. They do pretty much the same function with about the same amount of options.
yeah man u need to get it tuned right.. Go with what ur tuner is familar with.. U Could get a p28 or p72 ecu with hondata s200 or s300 if u don't have to worry about emissions and if that's what ur tuner uses.. I have rc 550's and have 230whp with 6 psi
Last edited by 00CDMLUDER; 06-08-2010 at 10:33 PM.
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