Dyno print-out

[bbenny]

Hey Ive attached a copy of my dyno reading and was unsure about how to read the A/F ratio.

any advice on what my car is doing would be great!

thanks

[DAMQIK GTS-T]

it just looks a little too rich to me (good cos most r32's I have seen run lean)

note how the ecu has richened up the the fule for a second when boost came on at about 3200 rpm and then nealy over compsated for it.

With regards to your question the right hand scale is A/F 11 is rich

14 would be too lean your car dosn't look to bad.

[bbenny]

so if i was to get say an apexi SAFC the aim would be to get that line not to dip off to the end, but to stay reasonably flat?

[meggala]

geezz did they only rev it to 5500 thats where mine comes alive with the rb25 turbo mine pulls to 7500 nicely

[bbenny]

Meggala; yeah i dunno what the deal iswith that i was wondering why they only went to there. when i drive it it feels like it has good power to at least 6,500rpm.

btw i have that RB25 turbo on the way

[MM2death]

Not bad power there mate....what boost was it dynoed with?

Scott.

[bbenny]

that was on 14psi, with standard turbo.

what sort of gains should i get from an RB25 turbo and SAFC to tune out the richness?

[MM2death]

My brothers 32 made 261rwhp with hi flow RB25 turbo, fuel pump, FMIC and 15psi.

Before the RB25 turbo was fitted, it made 223rwhp @ 13psi.

I hope that helps.

Scott.

[MM2death]

And also, it has standard ecu....no AFC.

[bbenny]

Awesome, thats pretty impressive!

Hey i noticed under your name it has 192kw at the wheels, what have you done to get that sort of power?

[MM2death]

It has a different turbo....it was on it when it came from Japan. Not too sure what it is but looks similar to a 2530. Other mods include 550hp intank fuel pump, bleed valve set to 13psi, 3inch zorst turbo back, air pod. Standard computer, no AFC, standard injectors, standard intercooler. Next mod for me is definately the front mount!!! I want over 200rwkw....then i'll be satisfied.

Scott.

[MM2death]

No one that has seen the turbo can positively identify it...grrrr.

Well it seems to do the job.

Scott.

[bbenny]

standard cooler! wow! you must have a pretty efficient turbo to pull that power and run safe with a standard cooler, whatever it sounds like it works well!my dream would be to have an HKS 2530 on mine.

let me know how it goes when u get that cooler fitted and the boost wound up no doubt

[MM2death]

Yeah will do. I just take it easy atm because i'm afraid of pinging. The lowest boost i can set with the current actuator setup is around 13psi.....so i'm really on the limits of the stocko cooler.

Regards,

Scott.

[Cubes]

Don't slap a fuel pump on it unless you really need it as you will loose power.

UNLESS you have a fuel comp and are going to tune it when you fit the bigger fuel pump.

The bigger fuel pump made mine loose almost 20rwkw and the AF's were around the 11's origionally like yours.

[bbenny]

thanks for that joel, i was thinking about changin it too! but i wont bother now - save some $$$

[Guest Boxhead]

well to ad confusion or not haha, can someone tell me exactly what my a/f are doing?

they basically run just below the 13 all the way along except for the end of the dyno were when teh power starts to die off it starts to raise just above 13, and looks like if we kept going it would keep rising..

sorry i couldnt post a pic as some how the usb cable for my cam is lost...

[SlowGTS-t]

Boxhead,

You are running too much boost or your fuel pump is dying. Basically not enough fuel getting worse at the top of the rev range when the most fuel is needed.

Benny, your a/f looks quite good for a stock ecu. Mine dips into the 9's above 5000rpm...

[Guest Boxhead]

im only running 12.5 psi...

i think i may install my good trusty walbro pump that is sitting here...

[MRK25T]

impressive Bbenny.

I had my R33 dynoed at procar a few weeks ago and managed 252rwhp at 0.8bar (about 12psi).

I got Paul and the team to tune my powerFC and from memory they managed 220rwhp @ 6-8psi or so.

My AFR stayed constantly 12 across the range.

Knowing nothing about dynos, maybe they didnt set the computer up correctly to mirror what revs your car was at?

Mine was the same - I was in the car and I can assure you that they took it past 5500rpm.

Mark