Race gas questions?!?!?

[krt22]

Serious guys stop feeding the troll. Some folks still think the world is flat and use "every map I've seen is flat" as their anecdotal evidence

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[RonnieSVT]

Serious guys stop feeding the troll. Some folks still think the world is flat and use "every map I've seen is flat" as their anecdotal evidence

Im a troll because I don't believe that race gas does anything for a stock car? Im obsessed with the gt350 , I was the first here to post photos of a Magnetic gt350 with blue stripes.

Even the person who gained hp with 98 over 91 said he was surprised as his 2014 boss 302 made nothing more with 98.

Its not like im stupid and every car is going to make more power on 100 octane , its seems that the gt350 may be the exception , but im still not convinced.

 

[Voodooo]

Im a troll because I don't believe that race gas does anything for a stock car? Im obsessed with the gt350 , I was the first here to post photos of a Magnetic gt350 with blue stripes.

Even the person who gained hp with 98 over 91 said he was surprised as his 2014 boss 302 made nothing more with 98.

Its not like im stupid and every car is going to make more power on 100 octane , its seems that the gt350 may be the exception , but im still not convinced.

That's fine. Don't believe us. Hook up with your old dyno friends and see for yourself. Being surprised and being a non believer are two different things. It's up to you to decide. Nobody he is lying to you. And honestly I can careless if you don't believe me. And as far as the PM you sent me, I have headers and a tune. That's the only non stock parts I have on my power train.

 

[EF300]

Are you being ignorant or just plan like to argue? When I dynoed my car on 93 octane I pulled 511rwhp. With Sunoco 260gt 100 octane I pulled 529rwhp. I still believe more is to be had in my car. Time will tell. I can't understand why it's so hard for you to realize that race fuel / E85 provides more power to the gt350. It's pretty simple logic.

[MENTION=7033]Voodoo[/MENTION]

When u dynoed your car on 93 what engine / exhaust mods did you have and were you running a tune ?

Thanks

 

[jtn83]

I find it hard to believe that Ford left that much on the table with a 93 tune. In fact, it's a little concerning that they are backing timing out on 93 octane--that's placing alot of trust in knock sensors for a motor they have to warranty.

I'll buy the argument that for extended track sessions, especially in hot/humid ambient temps, that higher octane will delay or prevent knock and the responding timing retard.

I'd say it running any smoother would be mostly due to the placebo effect, but that's just me. I will say that the owner's manual, or supplement, specifically says not to use E85.

But, I'm hesitant to believe that they'd leave so much timing on the table on a stock tune--just doesn't seem like something and OEM would do. Where's the benefit for the bean counters at Ford to do this?

 

[Voodooo]

[MENTION=7033]Voodoo[/MENTION]

When u dynoed your car on 93 what engine / exhaust mods did you have and were you running a tune ?

Thanks

This is all in my ARH GT350 thread. But to answer your question.
All my dyno pulls were done on the exact same tank of Sunoco 93.
100% stock 454 rwhp
100% stock tune, ARH long tubes, catless X pipe, stock mufflers 484 rwhp
Lund tune, ARH long tubes, catless X pipe, stock mufflers, lean tune letting off the throttle early at 6000 because of spark knock because of bad tune. 511 rwhp
Lund tune, ARH long tubes, catless X pipe, stock mufflers, slightly revised Lund tune, 100 octane Sunoco 260 GT. 529 rwhp. Since then I have done more data logging and a revised tune but haven't been back to the dyno since. I feel the revised tune is smoother, stronger and more capable! When I get time I'll try more pulls. The 529 rwhp was just one pull because of time frame.

 

[krt22]

Im a troll because I don't believe that race gas does anything for a stock car? Im obsessed with the gt350 , I was the first here to post photos of a Magnetic gt350 with blue stripes.

Even the person who gained hp with 98 over 91 said he was surprised as his 2014 boss 302 made nothing more with 98.

Its not like im stupid and every car is going to make more power on 100 octane , its seems that the gt350 may be the exception , but im still not convinced.

You asked a question, got a few answers confirming that race gas results in small gains, even went so far as to post a dyno chart explicitly answering your own question. Then you refute this hard data (that is backed by others) in favor of your own opinion, which is based off tribal/anecdotal evidence and other experience with completely unrelated cars.

Pretty trollish if you ask me.

 

[chief135smitty]

Does the 100 octane gas smell like race gas? That alone is worth the extra coin!

 

[superman07]

Are you serious ? Do you really think that you can run faster with less rpm with a octane change? You realize that even if your gt350 made 1000 hp at any rpm in any gear on both cars are going to be going the same speed no matter what hp, it may get to 150 quicker but that speed at rpm wont change. You also state that your transmission runs cooler with 100 octane

missing the point, higher octane changes the driving behavior of the car and widens the power band by giving you usable torque a couple hundred rpms earlier, thus the same general pull from 3.4-4k as 3.7-4.3k with 93.

my biggest complaint with the low displacement high flow V8 was not reaching any real torque until so deep in the rpm, this is dramatically improved with higher octane in my experience.

 

[superman07]

When you first started using race gas, did it take a few fill ups to adapt, or was it noticeable right away?

For me, within 10-15 miles. Might depend on how empty your tank may be. It can take a bit longer for KAM and ecu adjustments to adjust completely but the power comes on pretty quick.

 

[Voodooo]

Does the 100 octane gas smell like race gas? That alone is worth the extra coin!

Slightly.

 

[jonesd]

So are there any octane Booster that work well that don't contain MMT?

 

[Voodooo]

So are there any octane Booster that work well that don't contain MMT?

I believe klotz is MMT free

 

[65sohc]

How about returning to the original questions? The OP says it is his first track event in the GT350 and from his tone I gather he is not a seasoned track rat. Whether race gas increases power or not is irrelevant. It isn't a race and the last thing that will hold him back is lack of power. What race gas on a race track does offer is insurance. It is extremely unlikely that the car would suffer a catastophic failure due to lack of octane, but it is not impossible. My son ran an HPDE at Buttonwillow in his 2015 STi with 91 octane pump gas and broke a ringland, necessitating a rebuild (which the dealer warrantied). He'd never had a problem before but the conditions happened to be right for disaster that day. Had he filled up with race gas that likely would not have happened.

 

[Jb350]

How about returning to the original questions? The OP says it is his first track event in the GT350 and from his tone I gather he is not a seasoned track rat. Whether race gas increases power or not is irrelevant. It isn't a race and the last thing that will hold him back is lack of power. What race gas on a race track does offer is insurance. It is extremely unlikely that the car would suffer a catastophic failure due to lack of octane, but it is not impossible. My son ran an HPDE at Buttonwillow in his 2015 STi with 91 octane pump gas and broke a ringland, necessitating a rebuild (which the dealer warrantied). He'd never had a problem before but the conditions happened to be right for disaster that day. Had he filled up with race gas that likely would not have happened.

I made it through the weekend on 93 octane... here is a thread about my experience http://www.mustang6g.com/forums/showthread.php?t=60830
Long story short, yes it was my first hpde, but I do have a fair amount of karting experience, so during the second day I was moved to the intermediate group (with instructor). I was able to pass close to half of the field and was only passed a handful of times during my last session. And Chin Motorsports is a very experienced group overall. Im saying that so you can get an idea as to how hard i was pushing the car . I decided against using 100 octane because it was $9/gal. The car ran great all weekend, with oil temps into the low 270 on my last session (85-90 degree day). If it was cheaper I might of ran it, but seeing how well the car performed overall, I saw no need.

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