TT6.1 chip and basic Translator adjustments?

MNwe4 · May 18, 2016

If I wanted to up my base fuel pressure, to say 50 psi, to stretch my injectors just a bit further that would make the car want to run richer under normal driving conditions, right? Then the O2 would compensate, drive the BLM's down, and it would still run properly, correct? In order to get the BLM's back closer to 128 I'm thinking I could change the BASE and WOT knobs on the Translator. In this case would I only move the BASE knob to the 10% lean setting? Would I need to move the WOT knob at all? For some reason I have the impression that the WOT knob also has some affect on when the MAF hits 256 even under mid boost/throttle driving. Setup is basic Translator version 5, 3" MAF located in up pipe from front mount IC, Powerlogger, and TT6.1 chip running E85.

TurboDave · May 18, 2016

The WOT knob really only comes into play with the Extender chips. It will have little effect with your present chip.
Running the fuel pressure up to 50 should drive your BLM's down hopefully not too far. Setting your Base knob to the leaner position should help.
So your assumption are correct for the most part.
One thing to remember, when making a Base knob adjustment, reset the ECM so it can re-learn.

MNwe4 · May 18, 2016

Thanks for the confirmation and the reminder to reset the ECM. I'm switching from the winter storage gasoline to e85 tonight. Trying to decide if I should make adjustments right off the bat or drive the car for a few days to get a new baseline. Attached are two logs from last fall. One is a 1/4 mile pass on a 75* day and the other is a highway pull in drive on a 60* day. All car and chip settings remained the same, but I'm seeing a noticeable difference in correction. Care to take a quick look and advise?

I know I'm pushing the limits of the injectors. Feed line is -8 and return is -6. Pump is Walbro 430 lph. Base fuel pressure was 43 psi. I'm using the raw billet aluminum fuel pressure regulator. Are those known to not track 1:1 with boost? Also, I'm logging fuel pressure with a digital Autometer gauge, but the correction in the PL doesn't seem right. I'm positive it was reading 60 psi on the gauge all the way down the track. But... 43+21 is more than 60, hence my question about the raw aluminum pressure regs. Thanks.

TurboDave · May 25, 2016

MNwe4 said:
Thanks for the confirmation and the reminder to reset the ECM. I'm switching from the winter storage gasoline to e85 tonight. Trying to decide if I should make adjustments right off the bat or drive the car for a few days to get a new baseline. Attached are two logs from last fall. One is a 1/4 mile pass on a 75* day and the other is a highway pull in drive on a 60* day. All car and chip settings remained the same, but I'm seeing a noticeable difference in correction. Care to take a quick look and advise?

I know I'm pushing the limits of the injectors. Feed line is -8 and return is -6. Pump is Walbro 430 lph. Base fuel pressure was 43 psi. I'm using the raw billet aluminum fuel pressure regulator. Are those known to not track 1:1 with boost? Also, I'm logging fuel pressure with a digital Autometer gauge, but the correction in the PL doesn't seem right. I'm positive it was reading 60 psi on the gauge all the way down the track. But... 43+21 is more than 60, hence my question about the raw aluminum pressure regs. Thanks.

The only big difference I see in the two files is that on the first pull, with the much lower correction is that the inlet air temp was MUCH higher than the highway pull.

MNwe4 · May 25, 2016

Ah, my temp sensor is just tied off on the cruise control bracket since the MAF chips don't use it. I suppose it does show the air temp that is entering the air filter though. I guess things make sense. Highway pull has a 20* cooler starting temperature and boost is .5 to 1 psi higher.

TT6.1 chip and basic Translator adjustments?

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