Dyno Results with pics, I swear!!! lol

[ghx407]

10psi Pass W/O MSD: 274HP and 272ft/lbs

16psi Pass W/O MSD:Didn't print it out, but it put out 304HP and 305ft/lb

16psi Pass with the MSD Stacker plugged in: 319HP and 320ft/lbs

[Frozen240]

Seems that you are running a little lean between 3-4k rpm, then after that pig rich.

[frsh13]

Nice numbers!

edit... just saw your link and other post with your setup
Modified by frsh13 at 9:29 PM 11/12/2007

[S13FX]

Seems that you are running a little lean between 3-4k rpm, then after that pig rich.

Running a lil lean at those numbers isn't all that bad, cause thats where you hit mean best tq. Perfect AFR for that is if Im not mistaken and you can pull it off with perfect timing and tuning is about 12.7

[ghx407]

Thanks! Okay, so this is what my SAFC High-Throttle map looked like during the runs:

1k 2k 3k 4k 5k 6k 7k 8k-15 -11 -7 -7 -7 -7 -7 -7

According to the AFR graph and Frozen240's suggestion, I changed it to this:

1k 2k 3k 4k 5k 6k 7k 8k-15 -11 -6 -7 -8 -8 -8 -8

I richened 3k a tad, left 4k the same because it was good at 11.5 AFR, and leaned out a bit 5k, 6k, 7k, and 8k.

Good change or bad change?
Modified by ghx407 at 7:48 AM 11/13/2007

[the1320]

Internals?

[ghx407]

Rebuilt motor with about 1,200 miles, new oil pump, water pump, new Nissan OEM gaskets, new Nissan OEM timing chain kit, forged 8.8 Arias pistons, and forged Eagle rods. Externally, a tubular mani, T3/T04E, FMIC, Walbro 255, DW 740cc, N62 MAF, EFI Specialist ECU.

[S13FX]

HMM those are some serious corrections there on a safc for a tuned ECU.

is there something we're missing?

[ghx407]

Yes. I raised the fuel pressure to 45psi for better atomization, so the injectors are flowing about 10% more fuel than they would at the stock fuel pressure, 36psi. (According to the DW injector spreadsheet, the injectors flow 673cc @ 36psi and 755cc @ 45psi.)

If I lowered the fuel pressure back to the stock setting, the SAFC corrections would actually be:

1k 2k 3k 4k 5k 6k 7k 8k-5 -1 +4 +3 +2 +2 +2 +2

Any input on the SAFC changes mentioned in the 5th post? Good, bad, etc...