[Camaro1973]

Originally Posted by arpad_m

Man, you dodged a 50 cal there, caution paid off big time (phew).

BTW, not to start a debate or something, but if you can't even floor it in 4th at 80, you're basically wasting all those horsies... mine at least hooks normally in 3rd from 60, even with PS4S in the rear. Maybe 100 hp less than what you got is enough for the street Just saying.

(...and yes, I'll give you a 60-130 dragy screenshot sometime for now I've been playing with my new fancy scan tool that told me both of my key fobs were continuously posting weak battery DTCs, well before I noticed any issue unlocking or starting).

Ha ya. Always log It was cold tonight, probably coldest night since when ive had all work done, plus tires were showing cool and rears of course needed heat which i didn't do. I still wasn't expecting to go sideways at 80 in 4th.


Mat temps were like 75F lol.

[Evansa22]

ABL, always be logging haha. Especially dialing in the ethanol. Nice temps!

[Z OH 6]

Originally Posted by Camaro1973

Well I tried running E40 tonight, didn't go so well. High pressure commanded was 3300, it had 2000psi. INJ PW shot into the 7's. Thank god I was logging. Pulled into gas station and filled it up with more 93. Went down, to E35. Low/High side were staying pretty much as commanded but INJ PW max was hitting 6.5. Dropped it down to E30, commanded low/high side perfect and INJ PW MAX is around 6.2ms. I was around 5.5-5.7 on 93.



I'm wondering because its 20 degrees colder and my MAT temps with the chiller are like 70 at the start of a pull if this is putting more strain on fuel system for ethanol. I'm pretty sure colder it gets more demand is needed with ethanol.


It was tuned for a Max of E40 last week so not sure. Call planned with Andrew in the AM.


Its different ethanol then it was tuned on, it was tuned on E85-R, and E85 i just got was out of the pump which was 78%. But alcohol content is alcohol content. Both rated at 30% oxygen.


Stumped.


The good news is even at 80mph, punching it sends it sideways in 4th....

Cooler intake air temps require more fuel too since the air is more dense.

[KingLT1]

Good call by logging in the cooler weather. Always log the coolest temps you plan to run the car in. PD and Centri have no boost regulation. The cooler the air the more boost they will make. If it wants more fuel then it's trying to make more power.

[Camaro1973]

Fuel pressure issue fixed.

The dw300 pump didn’t have a check valve in it, looks like they re-designed the pump. The pump was replaced with a holly 12-170 100GPH pump, with a check valve. Other pump without check valve wasn’t building pressure fast enough. I guess that’s what happens when the fuel flows backwards

Holds a constant 80+ psi even with 40+ % ethanol
At around 840rwhp.