Heres my dyno run...

1st run (blue) max power = 160.4 hp max torque 144.9

2nd run (red) max power 160.6 max torque 142.8

And below is my air/fuel ratio which shows my car is running super rich is causing me to lose HP. I have bosch platinum plugs in there and the guy told me they were junk and that i shouldnt put anything but NGK's in. My only engine mods are a short ram intake and a ractive exhaust. If its not the plugs causing it to run so rich what are my options to fix this? vtec controller?

no comments? i was hoping someone would at least say if this was decent or not for a relatively stock 4th gen...

[PTOWNPRELUDE]

Uhhhhhhhh..........good job. lol There is a comment for ya but seriously that's pretty impressive man, also about the platinum +4 bosch plugs, I have some also in my Lude and I was wondering if what you said about them came from a reliable source cause I mean I payed like 30 bucks for the four of them.

Originally posted by PTOWNPRELUDE
Uhhhhhhhh..........good job. lol There is a comment for ya but seriously that's pretty impressive man, also about the platinum +4 bosch plugs, I have some also in my Lude and I was wondering if what you said about them came from a reliable source cause I mean I payed like 30 bucks for the four of them.

he's pretty reliable... he's a friend of mine and was a mechanic for honda for 4 years.. unfortunately, he's now at volkswagen.. i wish he were still at honda because he would hook me up..

[fritz_269]

Pretty standard curve. That's right where I would expect it to be. Stock manual 4g VTEC & 5g ludes usually put around 165 to the wheels. What gear were you in for the run?

You could probably get a few more ponies and maybe a slightly better MPG by running a piggyback a/f controller like the Apexi VAFC to lean out the fuel a bit.

Dump the +4 plugs. I'm embarrassed to say I got suckered too - I don't know what I was thinking. It took about 2 months before one started to fall apart (ceramic seperated from the metal). Went back to the stock NGK platinums - couldn't be happier. Heard generally good things about the iridiums as well (both Denso and NGK).

[PTOWNPRELUDE]

How much would iridiums run for price? and what kind of horsepower increase?

Originally posted by fritz_269
Pretty standard curve. That's right where I would expect it to be. Stock manual 4g VTEC & 5g ludes usually put around 165 to the wheels. What gear were you in for the run?

You could probably get a few more ponies and maybe a slightly better MPG by running a piggyback a/f controller like the Apexi VAFC to lean out the fuel a bit.

thanks fritz.. thats the kind of response i was looking for... And to answer your question I was in 4th gear on the dyno.

any ideas on why it would be running so rich to begin with? . I was thinking it could be a couple of things. first, the plugs... i'll be getting NGK's by weeks end and I havent changed the fuel filter yet either... the car has 78k on it and its probably due. i bought it with 56k on it 2 years ago and i dont know if the previous owner ever changed it.. i always assume the worst case. i just changed the wires/cap/rotor a month ago. so that should be fine. and I think the injectors are dirty. hence my question in the tech forum about fuel system cleaners. I'm hoping that once i get all this done it will balance out the system and i wont need an vafc controller.

[supafly1024]

Originally posted by 95vteclude


thanks fritz.. thats the kind of response i was looking for... And to answer your question I was in 4th gear on the dyno.

any ideas on why it would be running so rich to begin with? . I was thinking it could be a couple of things. first, the plugs... i'll be getting NGK's by weeks end and I havent changed the fuel filter yet either... the car has 78k on it and its probably due. i bought it with 56k on it 2 years ago and i dont know if the previous owner ever changed it.. i always assume the worst case. i just changed the wires/cap/rotor a month ago. so that should be fine. and I think the injectors are dirty. hence my question in the tech forum about fuel system cleaners. I'm hoping that once i get all this done it will balance out the system and i wont need an vafc controller.

Ludes run rich from the factory.

[4bidden]

are vafc's really worth the $300 that they cost?

[fritz_269]

Originally posted by supafly1024
Ludes run rich from the factory.

At startup and at WOT. I don't think they're pretty stoich at part-throttle when the engine's warm.

They engineer this richness in to help keep you out of detonation, particularly if you get a bad tank of gas, or are driving in very hot weather. If you lean it out with a VAFC, be a little more wary of these problems.

4bidden - What do you mean by "worth it"? They work as advertised. The Fields controller is a little cheaper but less adjustable - but those two are about your only choice for an H22 VTEC & A/F controller.