Race gas questions

[ccdhowell]

I've recently been concidering a higher octain racing fuel for my quadracer that actually does get raced, but doesn't have a high compression. My quadracer runs just fine on 93 pump gas, but I've been reading that race gas is a different animal from pump gas and there are several benefits.

In my area I can get Sunoco 110 and 112, both leaded. I know what a higher octaine does to fuel, causes the flame to expand slower and reduces detonation. But what if I run the 110 Octaine in my QR even if the compression doesn't require it? Race gas burns cooler and cleaner, I think, it also makes the carb a bit richer for the same jets, i've read.

Would I have any problems running a 110 race gas in my stock compression LT250R? Would there be a benefit? I'm looking trying to avoid my latest failure with this engine, a broken piston and ring sezure at the exhaust port. Would 110 race gas make that much of a temperature difference at the exhaust port? I've also read that it's easier to tune a carb with race gas because of the concistency of the fuel. Any truth to that?

Thanks,
Chris

[Ryan.]

running race gas in a lower compression engine would cause knocking and pre-detonation (i think) and i don't think it would make much of a difference its like running a car on 93oct. it dosnt give you anymore benefits as if you were running 89oct

[SWIGIN]

you dont need it at all

it will make more power with pump gas if its not pinging

[OldSchoolin86]

running race gas in a lower compression engine would cause knocking and pre-detonation (i think) and i don't think it would make much of a difference its like running a car on 93oct. it dosnt give you anymore benefits as if you were running 89oct

The first part is completely wrong, you will not get detonation from running too high of octane. The second part is correct though, there is no point to running high octane unless you have too much money and need to waste it on something. There will be no gain unless it's oxygenated and most pump fuels like that are just basic high octane.

BUT, being that you have it readily available you should seriously consider getting the head shaved and rechambered. 2-strokes love compression and it's a fairly cheap mod.

[smokinwrench]

The first part is completely wrong, you will not get detonation from running too high of octane. The second part is correct though, there is no point to running high octane unless you have too much money and need to waste it on something. There will be no gain unless it's oxygenated and most pump fuels like that are just basic high octane.

BUT, being that you have it readily available you should seriously consider getting the head shaved and rechambered. 2-strokes love compression and it's a fairly cheap mod.

Exactly what he said. We done extensive reseach about this when I was in votech, complete waste unless you need the high octane because of compression.

[KASEY]

OCTANE IS CONTROL NOT POWER,,,, it burns and a slower more consistant rate,, the reason you get more power from higher octane is,,, you can run more spark advance, alot higher compression ratios ,and with other mods thats where the power comes from ,,, the changes not the gas,,,,

[cr480r]

BUT, being that you have it readily available you should seriously consider getting the head shaved and rechambered. 2-strokes love compression and it's a fairly cheap mod.

excellent advise...

[whyzee]

Total waste of money, makes them run worse even if you rejet until you are blue in the face.Keep it at 93, save the $11 a gallon and have some mods done to the motor if you want more power , then run race gas....3 words...gets very expensive!!! but smells awesome
Run Klotz R 50 oil in pump gas for a great smelling ,clean burning bike, that will last and last
Best oil, imo

[ccdhowell]

There's a thread on the Quadracer forum I've been reading talking about race gas that suggests you should use it always in high performance 2 strokes for engine reliability issues.

Check it out here: Race Gas

Chris

[OldSchoolin86]

I rolled my eyes too many times by the end of page two keep reading. The guy that thinks premium fuel is taboo needs a reality check and if you have a machine that need high octain then run it other wise it's a total waste......... period. From what I can tell those guys are talking about "built" motors anyway.

LOL, hey ccdhowell, why do we have to scroll a full page to get past your signature? Haha.

[OldSchoolin86]

Damn-it, I got hooked on the rest of the thread. Man, I can't believe that those guys think you need anything more then pump fuel for stock machines. Also BOTH piston pics had NOTHING to do with octane. The first one was a crank bearing on the loose and the second was poor tuning. LOL, I like how some of the guys were blindly blaming head gaskets on octane too. Sure detonation can easily knock your top end apart but they're raising their right hand and swearing by it.

My favorite quote:
I know most of us are onboard with this.
Kyle, Just think what a piston, rings, head/base gaskets and a hone job--or worse, costs
compared to a barrel of good fuel.
I'm willing to pay for a little insurance for the race fuel keeping the motor happy, also smells so much better, mmmmmmmmmmm

LMFAO! A drum of fuel costs more then a top end. How in the hell is that cheap or little insurance? You might want to find a new group of guys to get info from my friend.

[Razgriz-Fighter]

I didn't bother reading that link due to OldSchoolin's response,lol. I too will have to agree with everyone else on here. There is no need to run race fuel if your machine is good with Pump Fuel. That would just be a waste of money for you and wouldn't help your motor any. And people that think power comes from just race fuel are silly. Sure it burns cooler and cleaner, but you arn't going to notice an OMG result, IMO..

[cr480r]

I rolled my eyes too many times by the end of page two keep reading. The guy that thinks premium fuel is taboo needs a reality check and if you have a machine that need high octain then run it other wise it's a total waste......... period. From what I can tell those guys are talking about "built" motors anyway.

They are talking specifically about LT500's...which are widely known to have detonation problems... Nobody on that thread said anything about needing race gas in any other stock machine...

[ccdhowell]

Damn-it, I got hooked on the rest of the thread.

That's funny right there.


I usually do lot's of research on just about anything before I make a decision, but it's been harder than heck trying to find factual information on this topic. My head tells me that 93 pump gas is fine, but I'm just trying to get to the bottom of this with factual info and real-world experiences.

Anyone run race gas in a stock engine?

Chris

[ccdhowell]

LOL, hey ccdhowell, why do we have to scroll a full page to get past your signature? Haha.

Yeah, I gotta make my racing team logo smaller.

Chris