Help Me Understand Timing

[JDBishopArts]

My recommendation is get Kevin @ Dunn Tuned to tune it. haha

My Dad was an petrol engineer for Exxon. While yes, most of the petroleum comes from the same place, the refining process and additives each gas producer adds are much different.

Most tuners prefer Exxon/Mobil, BP and QT gas. A lot of people having tuning problems were using Shell gas.

I learned a lot of this because when I went to tune my old Cobra at Gearheads I had filled up with Shell and it was pinging really bad. Luckily there wasn't a ton of fuel in there. We drained it and I filled up with QT and there was no problems.

Ford even recommended BP gas for years. I think they still do.

[DirtyD]

Originally Posted by JDBishopArts My recommendation is get Kevin @ Dunn Tuned to tune it. haha My Dad was an petrol engineer for Exxon. While yes, most of the petroleum comes from the same place, the refining process and additives each gas producer adds are much different. Most tuners prefer Exxon/Mobil, BP and QT gas. A lot of people having tuning problems were using Shell gas. I learned a lot of this because when I went to tune my old Cobra at Gearheads I had filled up with Shell and it was pinging really bad. Luckily there wasn't a ton of fuel in there. We drained it and I filled up with QT and there was no problems. Ford even recommended BP gas for years. I think they still do.

But then how can Shell produce a inferior consumer gas but make one of the best race gases in the industry (URT)?

I've tried a few tanks of QT in my car, and the last one I did gave me horrible mileage, so I didn't go back. That could've been a number of factors, but who knows.

The guys at JPC have been great working with me, so that's why I'm giving them my business. I'm hopefully going to have Kevin tune it when I convert to corn, but I'll stick with them for now.

I'll try another gas next go around this weekend when I head down to Austin for a JDRF walk.

[kdanner]

Originally Posted by DirtyD But then how can Shell produce a inferior consumer gas but make one of the best race gases in the industry (URT)?

It had their name on it, but they didn't make it. It also no longer exists. All that spamming of forums constantly and they still couldn't keep that program going.

I've had my best luck with Exxon. BP is good too but nearly nonexistent here. HEB has some nice E85 that always tests 85 to 90% here.

[DirtyD]

Originally Posted by kdanner It had their name on it, but they didn't make it. It also no longer exists. All that spamming of forums constantly and they still couldn't keep that program going. I've had my best luck with Exxon. BP is good too but nearly nonexistent here. HEB has some nice E85 that always tests 85 to 90% here.

We only have one HEB up here, but no E85. Hell, back in Houston is don't think many or any of the HEBs have E85.

Kroger is always good for E85 when you find a station that has it.

Opinions on Kroger gas? I'm running a tank right now and might see what my logs tell me.

[BV600]

Originally Posted by kdanner It had their name on it, but they didn't make it. It also no longer exists. All that spamming of forums constantly and they still couldn't keep that program going. I've had my best luck with Exxon. BP is good too but nearly nonexistent here. HEB has some nice E85 that always tests 85 to 90% here.

A friend that runs E85 here tested the HEB here and I believe it was 94%, and its like 60 cents cheaper than the other option around here which test lower.

[KungFuHamster]

Something else to think about D, is just because you're having to pull timing doesn't necessarily mean you're losing power...the opposite is true.

If you're running too much timing and the knock sensors are pulling timing, then you are losing power. You want the car to run to where it makes as much power as it can without any knock. Most cars I've had made more power with less timing. Every car is different.

[46Tbird]

Originally Posted by JDBishopArts Ford even recommended BP gas for years. I think they still do.

Pretty sure this message was in the gas tank of every S197 Mustang up until the 'incident' in the gulf.