M4.4 Remapping.......

[oblark]

Please excuse my ignorance I'm just learning, afrs are perfect, boost is at 15.6psi how come it's maxing the green's?

In an ideal world you don`t want to take the injector duty cycle over 80% and I`m at 94%

[oblark]

bigger maf??

The maf maxes out at 1603 kg/hr

So I`ve got a long way to go to max that out

[LiamT4]

The maf maxes out at 1603 kg/hr

So I`ve got a long way to go to max that out

Are you still using the maf from the bmw m62 v8 (4.4)?

[oblark]

If you use the formula from this web site

http://www.translatorscafe.com/cafe/...gram%2Fsecond/

And convert kg/hr to grams/sec then divide that by 0.8 I`ve hit 300.69bhp

[oblark]

Are you still using the maf from the bmw m62 v8 (4.4)?

It`s from a V8 540i

[jamesy12345]

The maf maxes out at 1603 kg/hr

So I`ve got a long way to go to max that out

I meant that the maf can flow more than the injectors can cope with

[oblark]

I meant that the maf can flow more than the injectors can cope with

Yeap

[LiamT4]

It`s from a V8 540i

Yep thats the one. They are fine for a stage 3 supercharger kit on an e39 540, which is around 480bhp.

Actually, i'm wrong. They are fine for stage 1 and 2, but should be replaced on the stage 3, so they're only good for around 415bhp

[960kg]

In an ideal world you don`t want to take the injector duty cycle over 80% and I`m at 94%

The thing is there is no ideal world!...

Most Volvo`s run at approx. 85% of the injector cycle ......94% is fine nothing wrong at all

The X40 T4 has the smallest sized injectors and according to Theory it should not deliver what it does!......but Volvo must have it correct as when not on full chat it is the most economical Volvo engined X40...

[oblark]

The thing is there is no ideal world!...

Most Volvo`s run at approx. 85% of the injector cycle ......94% is fine nothing wrong at all

The X40 T4 has the smallest sized injectors and according to Theory it should not deliver what it does!......but Volvo must have it correct as when not on full chat it is the most economical Volvo engined X40...

But I think 98.7% is a bit high



And thats 309bhp

[Nari]

But I think 98.7% is a bit high

oh c'mon.. I punished the tiny little 315 injectors with e85 and 1.3bar of boost (18t) when I was on VEMS... it told me they are over 110% from about 0.6bar
before that I saw 160%, but that was bc if a failing fuel pump. Sturdy little b ast ards

[oblark]

COP (coil on plugs) update

I`ve just recieved these pictures from Paul (Avinitlarge) who has done a fantastic job converting the M4.4 ecu.

[Nari]

Nice, my cop-ed ECU is ready for action as well

[Jamest5r]

I've got cop built into my turbo tuner but never really considered using it, are the benefits worth it? seems to run ok on the dizzy

[oblark]

I`m lead to believe you get a better spark with COP`s

[oblark]

Fitted the fuel rail pressure transmitter.



So at idle I have 32.98 psi fuel rail pressure.

[oblark]

As mensioned in my M66D thread I`ve lowered the O2 warm up time and enrichment V`s temp tables.

These are the values for the enrichment V`s temp (left) and O2 warm up time (middle and right)



I`ve lowered the enrichment by 28% and lowered the O2 warm up by 20-30 degrees on all temps from zero to 110 degrees C



The car started and ran OK with a low AFR of 12 for a few minutes then the AFR climbed to 14.7-15.3 until the temp came up to normal,

Before hand it would stay at a AFR of 12 for 7-10 minutes before climbing to a AFR of 14.5-14.9

So form these results I`ve managed to reduce the fueling amount on start up, I`ll will confirm over the weekend if I`ve managed to increase my MPG

[Dangerous Dave]

7-10 minutes, wow, thats a lot of fuel being wasted.

Nice one!

[oblark]

RESULT

Did a 70 mile round trip to the breakers this morning to pick up a few bits and bobs.

My MPG has gone from 19 to a average of 26.3 mpg

[Avinitlarge]

COP (coil on plugs) update

I`ve just recieved these pictures from Paul (Avinitlarge) who has done a fantastic job converting the M4.4 ecu.

Thank you for the kind words