08-26-2015, 11:10 AM
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#11 (permalink)
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Base Member
Join Date: Jul 2015
Location: Oregon
Posts: 125
Drives: 15 370Z
Rep Power: 18
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Quote:
Originally Posted by POS VETT
VipViper - this is a good news, thank you for posting this. For the longest time, I've wondered about information pieces you mentioned. I have recently acquired a GM truck (an FFV) equipped with an engine with a high compression ratio (11:1), direct injection, and variable valve timing. GM engineers managed to bump the engine output 25 hp and 33 ft-lbs just from using E85; not to mention the pleasing way the engine reacts to throttle inputs while on E85 and it even sounds different.
I thought a Z34 could benefit from using the E85 if it's so equipped (ethanol-resistant hardware first, then capacity) since the VQ37VHR runs a high enough compression ratio. Now, if you had the data, would you mind superimposing the injector duty cycle and the AFR?
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Yes some motors will gain more or less. We have the Ford Coyote (5.0L) engines picking up 17-18whp & 20-25wtq from E85.
The injectors are effectively maxed out -- holds a clean AFR but if you want more breathing room you can upgrade them, but you don't have to. It was the same story on the shop Coyote when we ran E85.
Quote:
Originally Posted by TerribleONE
Nice to see someone try this on a NA car. Having a hard time believing your MPG improved though, mine dropped like a rock
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Lol on an F/I car you're into boost so easily that it will just suck down the fuel like a crack addict.
Quote:
Originally Posted by ANMVQ
OK so talk to me about the injectors and pump. I have ECUTEK so I can added a map for E85 but I was under the impression that I need to change the pump and injectors?
BTW would this be safe to drive on until I get my tune updated. I only have access to Etunes and my tuner is in another state.
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With the VVEL/VTC system on this motor, do yourself a favor and find a competent tuner with a reliable dyno. I've seen minor 2-3* changes to VVEL net 4-5tq through parts of the curve, or the opposite -- cause huge 40tq dips in the curve. The goal is to fatten the area under the curve, and you're going to have a hard time trying to get 4tq here and there (and the cumulative effect is nice).
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