[J3NGOe90]

So recently I was cheking my boost on my e50 e-tune map that was done by local tuner here in long island. It boosts 18.9 psi and sometimes 19.0 psi with 7.5 gallons of e85.

When I put 8.5 gallons it boosts 18.2 or 18.3 psi max, so more e85 less boost? but I didn't notice losing power, its just with 1 gallon more, turbo boosts less but same power.

So, whats good for me to run 7.5 gallons and boost little more or run 8.5 gallons boost little less with same power??

[tc535i]

Gotta get a log, maybe your fuel pump can't handle that much e85 and the flow is being limited so it's dropping boost

[J3NGOe90]

Originally Posted by tc535i

Gotta get a log, maybe your fuel pump can't handle that much e85 and the flow is being limited so it's dropping boost

no limp modes, no codes, no power loss everything smooth and fine, but little wierd tho lol Im upgrading my lpfp next week

[tc535i]

You won't get codes, but you'll see fuel trims maxing out and the boost dropping.

[tc535i]

Hard to say no power loss, since you aren't dynoing at the two boost levels and mixes

[J3NGOe90]

Originally Posted by tc535i

Hard to say no power loss, since you aren't dynoing at the two boost levels and mixes

i did 3 gear pulls, cobb ap catches the highest boost and shows max boost, even if its dropping Cobb would show the max boost, so my max boost isn't going past 18.3 on 8.5 gallons maybe i thought it would be good to run same power but keep the boost low? sorry if i confused ill do logs tonight or tomorrow

[Jnat]

Data log fuel, I agree with above, LPFP might not be keeping up.