s52 swap obd1 Dyno

[Fernflex]

This was done on 91 oct gasoline,87 degrees temp, 40% humidity, No air filter or intake and Flowmeter open to the air.

All runs 4th gear.

Motor: (3.2L S52)

-Bimmerworld 3.5" intake boot
-Dinan Big Bore TB
-Bmp Adjustable Regulator
-Rogue Underdrive Pulley
-FlowMeter Euro 3.5"
-M50 Intake Manifold
-Shrick Cams
-Injectors 24# Bosch
-Oscar Velez Tune
-VAC Motorsports Stage 2 Cylinder Head
-MLS Gasket .80
-Head Studs ARP2000
-Dr.Vanos kit stage1
-Header Supersprint Euro Rep.
-Track Pipe Active Autowerke
-Catback B&B Triflow
--------------------------------
Drivetrain:

-Clutch UUC M5
-Flywheel UUC 11.5lbs
-Diff 3.46

[matthugie]

Nice numbers!

[hoveringuy]

Something is really wrong...

You go too rich at 5400 and then massively lean at 6200.

Dangerously lean, perhaps.

That motor should be hitting 260-265, easy.

[ak-]

Nice numbers!
But yeah, your AFR's go turbo status @ 5400 then say oknevermind @ up top. Scary!


What's stock sized headgasket on s52's?

[Fernflex]

I dont know if go with trm chips, stay with a Oscar Velez tune or megasquirt.

[kalib0y]

sweet numbers!

[VinniE30]

I wouldn't be using any "off the shelf" tune with what you have because none of them will match your engine's setup perfectly. Just get it tuned on the dyno by someone good.

[M-technik-3]

Time to consider either running some bigger injectors with a new tune. Not bad on numbers but there is more to be had.

[mulletman]

Love the flat torque curve!

But yeah, that goes frighteningly lean...

[328ijunkie]

Put an intake tube back on there. Turbulence at the MAF will cause those AF readings.

[Fernflex]

I need to find a 3.5" filter for my car today!

[MonkeyMan]

that thing should easily keep building power on to 7k.. I'm guessing you cut it because of the nasty ping from 6.3k and on?
I think a nice fuel upgrade & tune should get you to 280-290whp
yummy torque though ;)

[Fernflex]

What other fuel upgrades could I install?

My afpr is running a 42psi in idle, any of you know where ahould it be?

[5mall5nail5]

it should be 3.5 bar with the vacuum line disconnected I believe. Thats around 50 psi. With vacuum, 42-43 psi sounds about right.

Find out if its your fuel pump, filter, or what falling off up top. Thats horrible AFR if accurate (and I believe it is given power loss). Also realize that misfires register lean, so its possible you're breaking up at the top end.

[Fernflex]

Any suggestion for good spark plugs?