BP 93 vs Quik Trip Premium: Real world, dyno proven results!

[scheides]

So I have this friend with a really nice clean evo9. He's got some basic mods and a few weeks back I helped him install a fuel pump, stainless steal o2 housing, ported exhaust manifold, and ported his turbine housing for him while we had it off the car. A evo9 with MBC, exhaust, and tune should make about 290whp @ DB Performance. With his mods, he should hit right around 315whp. Well, the day I dyno'd my car (432whp woot!) he was on the rollers before me, and when I showed up for my appointment I helped troubleshoot what might be the problem with is car. It was running fantastic, except it was way down on power, about 270whp. We did a ton of tests, and the only thing we could find wrong was the throttle body seals were leaking slightly. VERY SLIGHTLY. Well, he replaced the TB with a ported and rebuilt unit, and went back. 270whp, no change. So, they decided to do a leakdown test at a later date.

He's from Rochester, and this time, he was out of gas when he got close, so he filled up on BP 93. The previous two times, he was on quik trip premium (92 or 93, not sure). Here's the before/after results:

http://img.photobucket.com/albums/v672/jimx3/IMG_0275.jpg

BP 93 FTW! I love the stuff, my car made 388whp with it alone. I don't want to know what it would do on this other crap :(

Here's the full info/modlist/story:
http://www.evomn.net/forums/viewtopic.php?t=4247

[123abc]

That's interesting. I've been using kwik trip 92 octane with no problems thus far. Maybe I should start filling up with bp 93.

[Forced Fed]

SWEET!

I know BP is the shit as far as gas goes, I used to take my DSM the extra 20 miles if need be to fill up there.

However, I had filled up at Holiday before my tune... I wonder what the difference would of been between the two?

[carltalon]

was the car knocking on the quick trip fuel? or was it just down on power? How mutch boost?

[Forced Fed]

Good question carltalon... I'm assuming he was able to run MORE boost without knock with the BP than the Kwik Trip gas and that's why the power was higher right?

This wasn't the same boost level and just different gas was it?

[awd-drifter]

BP is quite the good one. I "feel" that the BP does bring more power, but to little to notice. But comparing the BP with Holiday Gas Stations, i feel the difference with BP.

[scheides]

was the car knocking on the quick trip fuel? or was it just down on power? How mutch boost?

Good question carltalon... I'm assuming he was able to run MORE boost without knock with the BP than the Kwik Trip gas and that's why the power was higher right?

This wasn't the same boost level and just different gas was it?

24psi peak on both fuels. It was pretty much fully tuned out on both setups, shane was at the controls tweaking timing. AFR 11.0 across the board, not sure how much difference in timing there was.

[Forced Fed]

Oh, that makes sense.

More timing > more boost.

[4seasons69]

thats pretty crazy. I only run the bp 93 but thats because the shop I work at is a bp

[Shane@DBPerformance]

It was the same exact boost and same exact A/Fs. On the Kwiktrip gas the car was too prone to knock and we had to run lower than normal timing. His first pull on the BP 93 with no changes to the tune netted around 10awhp more. Then I was able to get a decent amount more ignition timing into the tune with the BP 93. The BP 93 he had was even noticably better than the BP 91/92 that we were always happy with.

The Evos run much less timing and are much more sensitive to timing than DSMs, so even being able to safely run 1 degree more can me a decent power gain with the stock turbo. 90% of the HP gains on an E85 stock turbo Evo are from more ignition timing, you might be running the same or 1 psi more of boost at 7000RPMs on E85 vs pump gas, because the turbo is just maxed to begin with and won't make much more boost in the upper RPMs.