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-   MazdaSpeed 3/6 - E85 Fueling (http://www.mazdaspeedforums.org/forum/f567/)
-   -   COBB AP/ATR Beta Fuel Scaling (http://www.mazdaspeedforums.org/forum/f567/cobb-cobb-access-port-atr-beta-fuel-98939/)

rfinkle2 03-02-2012 12:09 PM

cld12pk2go is quiet about it, but has some big balls!

Sick VD.

Dano 03-02-2012 01:15 PM

so does Anthony.....to soon???

lol

RichieRichness 03-20-2012 09:23 AM

1 Attachment(s)
Not much talk of fuel scaling lately so i'll wake things up. I finally was able to test the fuel scalar. Here are my results from a 93 octane tune to a 3.5 gal mix of e85. I used the following settings.

Injetor Scalar = 1.1
Specific Fuel Gravity = 0.75

AFR Target = 12.1

Timing from 3k to 6k rpm:
Code:

3.00        4.00        5.00        5.50        7.00        8.50        10.00
Attachment 55458

Enki 03-20-2012 09:46 AM

You have quite a bit more room up top. I was running 14 @ 6k on 3 gal mix. Otherwise, looks like you only need a slight bump to correct the MAF. What do the trims look like?

RichieRichness 03-20-2012 12:41 PM

Quote:

Originally Posted by Enki (Post 1318463)
You have quite a bit more room up top. I was running 14 @ 6k on 3 gal mix. Otherwise, looks like you only need a slight bump to correct the MAF. What do the trims look like?

Oh yeah I know. I was running 14* @ 6000 rpm on my older map but wanted to put a side by side comparison together with the only change being the scalar.

Fuel trims are not terrible (between 0 and -5) but was not expecting them to be so far off considering my WOT values are so close.

Enki 03-20-2012 12:58 PM

Might need a bit of a tweak on the FSG value then; you're only off about 1.7% up top (assuming 12.2 peak afr @ WOT), so pulling up to 5% fuel could mean that you're flowing too much fuel due to the weight not being correct.

Assuming 3.5 gal mix, with e75 at the pump; this comes out to roughly ~e24 in your tank (might be lower, in which case you'd run richer with the following settings):

FSG: 0.7484
Scalar: 1.0747

Worst case is you run a 12.3-12.5 AFR if your MAF cal is actually off a bit; with so little timing in the engine though, don't think that will be a problem for testing.


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