Here's my setup: 01 GSR, OBD-I P72 Conversion, Uberdata, DSMs, T3/4, 7 PSI. Look at that huge bog at 4500 (my X-over point)! I drop 40 WHP Straight down! Any ideas to clean it up? My A/F looks okay to me, and timing is left untouched with a .75/PSI retard. Does the ECU automatically retard timing for VTEC or what?
-Liquid

 

dude that is some low *** numbers for a gsr with 7psi. i think it should make at least 230-240 horses with about 170-180 lb torque. you might be running lean in that area when vtec kicks in. i'm not a expert of uberdata yet but soon will learn. until thwn i let j davis and others help you out

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Look at the second graph...the a/f shows a 12.5:1....I found multiple leaks in my header flange, and the altitude up here (colorado) made me hit 120 WHP on a stock motor so i'm guessing that is contributing to my pathetic #'s. The stock cat and Exhaust dont help either

 

wow man ...somethings up with your set up... those numbers are extremely low..OUCH!!!! who tuned it?

 

i'm in the process of self tuning it....I was running AFR's in the 10's during xover, so i thought it was that. When I ironed out the AFR to what it is now, the bog is still there.

 

Anyone else have any insight?

 

Easily fixed, move the VTEC point up in the RPM range

 

try 5200 to start on that vtec crossover, and .75 is still very conservative, you might drop to .5 or .6 per psi and gain some power.

 

would you recommend keeping the IAB system or completely disabling it when i bump the x-over to 5200?

 

hondata

 

**** i would bring it up to 5400 and see how it feels.

 

Fixed. I bumped the timing up to .6/PSI, and the VTEC up to 5400. X-Over is MUCH smoother. Also, I found the reason for my low numbers...my boost gauge is messed up! The gauge showed 7.5 after messing with the MBC...but my map sensor datalog showed a MAX value of 1331 mBar! Gotta get that fixed, and hit the dyno again. Thanks all!

 

isnt 1331 mbar = 9.317psi?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KraZEtEggIE &raquo;</TD></TR><TR><TD CLASS="quote">isnt 1331 mbar = 9.317psi?</TD></TR></TABLE>

Double OUCH!!!

You might wanna let an expert tuner take a look at your setup. If KraZEtEggIE is right then you might want to check the condition of your motor.

Something is wrong, terriablely wrong. I am trying to make you feel bad but this is the truth buddy.

You need to worry about your low numbers first then work on the Vtec X-Over Bog.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KraZEtEggIE &raquo;</TD></TR><TR><TD CLASS="quote">isnt 1331 mbar = 9.317psi?</TD></TR></TABLE>

1331mbar is like 19.3..psi - 14.7 atmospheric pressure = like 4.5 psi or around there

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by OoHiTzToMMy &raquo;</TD></TR><TR><TD CLASS="quote">hondata </TD></TR></TABLE>
Ignorant comment.

 

First thing. Do a compression test on your motor. Second, get your exhaust leaks fixed, those are a good reason your losing some major power. Third, your definately going to lose some power being up at that altitude so there are some things that can atleast make you breathe easier.

Try what I stated above and then come back with some numbers. Also, whats the correction on the sea level **** compared to colorado, isn't there a way we can figure out how much power he would have if he was at sea level, so then we could see how low his numbers are. Check all your clamps for leaks aswell, because there is some serious power missing.....

 

Well, atmospheric air pressure here in denver is 12.2 PSI. From the standard 14.7 PSI, that's a 18% loss in ambient air pressure. So does that mean my car looses 18% of it's potential?

 

raise your VTEC X-over up to around 5500-6000