Got the Prelude DYNO tuned today. I encountered a cop on the way though he cited me for no front license plate, (non-moving violation, 0 points, and $18. )
So I got to the DYNO (PFI speed) and the rest is history right. They did 12 runs
-Ran the base line at 165 hp with AEM CAI intake, Mugen Header, Mugen Exhaust, and VAFC.
-The final was 176 hp.
The guy who was tuning it got it to 170 hp then another guy came and looked at the chart and brought another 6 hp, so I think its tuned to the max. I'm very happy with the results, (10 hp who wouldn't be. ) As you can see in the a/f chart its much leaner than stock at the VTEC band.
I'll have colored copy soon (their color printer wasn't working)






uh oh... police

 

is it just me or is your A/F ratio really HIGH?

 

Wow that header is prettyful

 

the exhaust looks so nice...

 

WOW!!... you spent somewhere in the neighborhood of $2500-$3000 to get a measly 176whp?!?!?!?

sorry if you don't like what i have to say, i just think it's a waste to spend to spend that much and still make no power


[Modified by EX-Boosted97Lude, 4:46 PM 3/26/2003]

 

I've learned that trying to make power from Hondas is pointless you spend a ridiculous amount of money and get shity results. On the same token ex-boosted97lude didn't you spend somewhere around $20,000.00 to get 250 hp. I think that's is even more ridiculous, considering you could have easily put that money in to a MR2 turbo and got around 500 hp. I refer you back to your own quote.


[Modified by RAB, 3:06 PM 3/26/2003]

 

no, i spent that much, and when dyno tuned, i wil have in excess of 400whp and that's before the nitrous

 

Nice results Is your vtec engagement point over 5k? Was that the optimum placement for maximum HP results?


[Modified by Que_Lude, 2:10 PM 3/26/2003]

 

Ok so tell me how much did you spend on you car, total, and what is the point of your argument. I already know its silly to spend money on hondas for hp purposes.


[Modified by RAB, 3:14 PM 3/26/2003]

 

i'm just not an N/A fan, that's all, making N/A HP is way harder than FI, and WAYYYYYYY more expensive to make decent power

 

Ok fine I agree with that. Agrument settled are you happy. Or do you want to continue with some other pointless bullshit.

 

don't be hostile, i wasn't, i just told you my opinion

those are good number for a stock H22A4 with some bolt ons, it's just not my thing :shrugs:


[Modified by EX-Boosted97Lude, 5:25 PM 3/26/2003]

 

well 14.7 is stoich, so he isn't running lean. As long as it isn't detonating then that 14:1 AF is fine.

 

THat's in closed loop. THis was a open loop WOT pull....his A/F shouldn't be that high should it?

 

May sound funny considering I was just at the DYNo but which line on the a/f reading is the current one. Is it the one that hovers around 14?

 

the darker one....looks like they only modified the fuel on the high cam, and didn't touch your VTEC crossover....

 

Is that SAE corrected horsepower? It doesnt say so on the graph, if not do you have those numbers?


Thanks,
-Jeff

 

I'm not tuning expert, but you make power by running leaner. I'm sure they made sure that he wasn't detonating, so I don't see any problem with it.

 

"lean is mean"..... but yeah, i WAS running about a 13:1 a/f under boost in my car until i got slight spark knock, pulled like a raped ape, for real, but i got too scared of blowing it up, so it now runs like 11.5:1 under boost

 

I love the pic of the copy in the rear view!!!

 

14:1 is rather high for a street car I would say. I've usually seen people tune to 13.5:1 for street cars. I think 13.7:1 is stoich for WOT?

 

From what I hear 13.5 is pretty good/forgiving for a street car.....if you ever hook up juice or anything be sure to richen it up.....good numbers though.....

 

If you guys notice, they use an exhaust gas analyzer (external probe for reading a/f from the tail pipe) Ive seen cases where it read slightly leaner then if you were to use a wideband o2 sensor before the cat. So my guess he is running around 13.5-13.6 a/f

 

So you are saying that the exhaust gas changes before it reaches the end of the tailpipe?

 

stoich is always 14.7:1... (atmospheric pressure is 14.7psi at sea level... there is the corolation)


[Modified by EX-Boosted97Lude, 8:27 PM 3/26/2003]