100 Octane flash
Account Disabled
Joined: May 2007
Posts: 328
Likes: 0
From: Infineon Raceway
So here's what I got from one of our tech gurus:
A better question would be what boost does your turbo begin to run out of efficiency. On an VIII, I'd argue 20-21 is the limit whereas the IX could go another pound or two. FPs hybrid turbos (White Rabbit, Green, 20G etc...) gain another few pounds on top of that, but start blowing hotter air around 25+ and don't always like to maintain that level as they approach redline. I wouldn't
worry too much about boost levels until there's a much larger turbo to contend with, especially if the car is being driven on a road coarse--quarter mile bursts are a different story and higher boost levels are generally sought after and are "safer" due to the very small window that the car is seeing full throttle/load/boost.
In essence, HP/torque (and boost) could remain relatively unchanged when
changing octanes. We could up the boost and gain 10-20
(roughly) or more. There are benefits to 100 octane as there's less
variability in the fuel vs. traditional pump gas. This allows us to
tune somewhat less conservative and power delivery can be altered
through the fuel and timing maps while leaving boost alone. The safety
net widens with 100 and that's the advantage with the OEM-style turbo
(or any of its variants).
Hope that is of some help
-Bill@WORKS
A better question would be what boost does your turbo begin to run out of efficiency. On an VIII, I'd argue 20-21 is the limit whereas the IX could go another pound or two. FPs hybrid turbos (White Rabbit, Green, 20G etc...) gain another few pounds on top of that, but start blowing hotter air around 25+ and don't always like to maintain that level as they approach redline. I wouldn't
worry too much about boost levels until there's a much larger turbo to contend with, especially if the car is being driven on a road coarse--quarter mile bursts are a different story and higher boost levels are generally sought after and are "safer" due to the very small window that the car is seeing full throttle/load/boost.
In essence, HP/torque (and boost) could remain relatively unchanged when
changing octanes. We could up the boost and gain 10-20
(roughly) or more. There are benefits to 100 octane as there's less
variability in the fuel vs. traditional pump gas. This allows us to
tune somewhat less conservative and power delivery can be altered
through the fuel and timing maps while leaving boost alone. The safety
net widens with 100 and that's the advantage with the OEM-style turbo
(or any of its variants).
Hope that is of some help
-Bill@WORKS
Evolving Member
Joined: Jan 2005
Posts: 330
Likes: 0
Dont know how much help i am, but I do however run 100 oct only with a 26lbs spike and a taper to 22 by redline. my mods are in my sig. I have had no major issues and my tuner is confidant this is a safe tune. I dont think threres anything wrong with a little more boost with 100 oct.
hth
hth
A higher boost is great with a higher octane but you have to take timing into consideration. You just can't just turn up your boost without a wideband tuner because you don't know where to adjust the timing. Personally, I think WORKS should make a tune for drag racing. Grant it they do have a smooth power curve peak numbers, I believe, is important when drag racing as along as though peak numbers are kept within the curve area used when drag racing.
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