A2A Supercharged Intake Options

DrBacon · 01-28-2020, 01:47 PM

Quote:

Originally Posted by Senna-F1

SOHO tightened my belt, even though at first they thought it was fine. Up until they tightened it, boost was still dropping up top, just a tad. So to those who are losing even a small amount of boost, might just need a tighter belt. Posting log data showing boost till redline. Boost gauge read 15.2 psi which is even a bit lower than the ECUTEK log data of 30.2 psi absolute pressure.

Is that timing on pump gas or ethanol? That's some insane timing advance

redondoaveb · 01-28-2020, 02:41 PM

Quote:

Originally Posted by DrBacon

Is that timing on pump gas or ethanol? That's some insane timing advance

It must be on pump. I know at least with mine (I have 91 octane) it had to be timed for pump or it would get bad knock if timing was set for e85. That's why I did the wastegate set up.

Senna-F1 · 01-28-2020, 02:50 PM

Quote:

Originally Posted by redondoaveb

It must be on pump. I know at least with mine (I have 91 octane) it had to be timed for pump or it would get bad knock if timing was set for e85. That's why I did the wastegate set up.

I have a flex fuel tune. I’m pretty sure timing and fuel are set for pump and e85, and then interpolated for whatever mix you end up using. Obviously fuel has to work this way, and I assume timing works the same way. Tune for best and worst fuel case and interpolate the points for the mixtures of each fuel type.

redondoaveb · 01-28-2020, 03:23 PM

Quote:

Originally Posted by Senna-F1

I have a flex fuel tune. I’m pretty sure timing and fuel are set for pump and e85, and then interpolated for whatever mix you end up using. Obviously fuel has to work this way, and I assume timing works the same way. Tune for best and worst fuel case and interpolate the points for the mixtures of each fuel type.

You could be right, that's above my pay grade.

I actually misspoke. I was thinking boost. Unfortunately, on 91 octane my car started knocking at 13 psi without pulling a bunch of timing.

Senna-F1 · 01-28-2020, 03:52 PM

Quote:

Originally Posted by redondoaveb

You could be right, that's above my pay grade.

I actually misspoke. I was thinking boost. Unfortunately, on 91 octane my car started knocking at 13 psi without pulling a bunch of timing.

Alright, in that case I don’t have that data. That being 14.7 psi on pump. That would have been the boost on pump, yes. I do not know how the timing and knock were addressed. Maybe not very well? I don’t have the pump pull dyno yet or any pump logs to check for what the timing did. I have heard that kind of boost on pump really does not work well. Luckily though there is e85 all around me.

redondoaveb · 01-28-2020, 06:08 PM

Quote:

Originally Posted by Senna-F1

Alright, in that case I don’t have that data. That being 14.7 psi on pump. That would have been the boost on pump, yes. I do not know how the timing and knock were addressed. Maybe not very well? I don’t have the pump pull dyno yet or any pump logs to check for what the timing did. I have heard that kind of boost on pump really does not work well. Luckily though there is e85 all around me.

You're lucky. You at least have 93 octane if you need to run pump gas. There's no way i could run 14.7 psi on 91. But yeah, I run e85 most of the time. I only run a tank of pump gas once in a while to clean the fuel system out.

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