Need some advice - Dyno results

[j0oftheworld]

'94 M50 Motor:
M3 Cam/Tuner Chip/Headers/Straight through Exhaust/Cone filter Intake/3in MAF/Light blue injectors

Getting really lean condition at WOT
Also having a sawtooth on all graphs (hp/tq/af)
Weird dip in power @ 5000rpms
Normal Air/Fuel above 6100rpms

I just bought the car. It's a track machine so I'd like to be able to run it w. better A/F ratios!
Don't know much about them so I kinda need school'ed and suggestions, please.

Thanks



*Green run was cold still

[fiftytakedowns]

good numbers 196 rwhp is pretty good

[j0oftheworld]

bump

[gregslow318i]

checked your fuel psi at the rail? is you maf clean? its pretty basic stuff just to make sure your car is running in tops. not much you can change w/out a new tune

[hoveringuy]

Your smoothing is at 0 which magnifies the ripples. A/F at the lower rpms is fine in the 14 to 14.5 range. It actually makes best power there, it shouldn't need to get richer until higher rpms like it does.

Only problem I see is that your motor has a very narrow sweet spot at 6000.

Also, it was 90 degrees, are those figures SAE corrected?

[FredK]

What chip are you running?

Light blue injectors, are they Bosch 24lb/hr injectors?

[M-technik-3]

Is the chip tuned for cams and 3.0 maf and the injectors that are in the car?

[j0oftheworld]

Your smoothing is at 0 which magnifies the ripples. A/F at the lower rpms is fine in the 14 to 14.5 range. It actually makes best power there, it shouldn't need to get richer until higher rpms like it does.

Only problem I see is that your motor has a very narrow sweet spot at 6000.

Also, it was 90 degrees, are those figures SAE corrected?

Yes, AZ heat! Those are SAE corrected.
With smoothing set to 5 it's still 14.5+ until 5k rpms

What chip are you running?

Light blue injectors, are they Bosch 24lb/hr injectors?

I'm not sure which injectors they are.. that's why I posted their color.
Supposedly it's the TMS chip for an M50/M3/Flywheel, etc tune..

[j0oftheworld]

Is the chip tuned for cams and 3.0 maf and the injectors that are in the car?

I bought the car ~month ago and am trying to get all my NASA TT classing done. Not 100% on some things at the moment.

[7pilot]

Talk to the chip tuner after investing in a running fuel pressure test..
I would seriously look into checking, and possibly removing and cleaning the fuel tank and uprating the fuel pump, or getting a little more voltage to the pump.

m