The E85 Mystery

Originally Posted by NOBLE|370Z

Some great discussion taking place here.

It would be nice if VQ owners knew whether our cars are power limited at 550WHP due to engine internal strength or if it's based solely on detonation. This is important to distinguish because guys with stock motors and FI should know what the limiting factor really is.

If a tuner could get 700WHP out of my stock engin, regardless of fuel, would I really feel comfortable keeping it there (even if there are no signs if detonation)? Definitely not lol

I'm getting my car tuned in a couple weeks and I want to be prepared so I think I'll play it safe. I'll have two maps. 1 for 91 and another for 94 octane. Regardless of the amount of power he can get with the 94 I will make sure to use a boost setting that maintains no more power than 550WHP. When someone can produce information indicating it's 600WHP then I'll change it at that point. For the long haul I think that's the best approach - IMO


NOBLE

Originally Posted by Seb@SZ

One BIG issue that doesn't come up is the fuel pressure drop associated with a stock fuel pump assembly AND keeping it returnless. Over time the drop can get worse leaning out the AFRs. I HIGHLY, and I stress HIGHLY, recommend forced inducted 370Zs run a return style fuel system. From what we've gathered, fuel pressure drops become apparent near and around 450 whp.

Originally Posted by Seb@SZ

One BIG issue that doesn't come up is the fuel pressure drop associated with a stock fuel pump assembly AND keeping it returnless. Over time the drop can get worse leaning out the AFRs. I HIGHLY, and I stress HIGHLY, recommend forced inducted 370Zs run a return style fuel system. From what we've gathered, fuel pressure drops become apparent near and around 450 whp.