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 Post subject: Re: Low comp. & fuel
 Post Posted: Tue Jan 10, 2012 12:49 pm 
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Joined: Sat Feb 07, 2009 4:12 pm
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Location: Adelaide Australia
There is much more to it than you were told. The old style 60's and 70's engines for a start are not bad, its not that they cant burn hot enough. Open chambers dont have squish so they cant use squish induced turbulence to increase the burn speed near TDC. So they have to be designed and tuned differently to obtain similar combustion efficiency. That said they are more resilient to mistakes. Its easy to get a squish wrong, its easy to detonate a squish motor with some worn or inaccurate ignition parts. Compression and stroke and rod ratio are more important on a squish motor to have accuracy and suitable design to prevent disaster.

There is no consistent reasoning behind a statement that premium grade fuels should not be used in low compression or open chamber engines. The best fuel for an individual engine is whatever it takes to work in harmony with the many variables.
Octane has no relationship to vaporization or distillation temperatures. Its the selection of Hydrocarbons that controls that. All fuels sold in Australia for street have to comply to a narrow range of vapor pressure specification. Fuel blenders can give you a high octane mix or a low octane mix with the same distillation curve, One may burn dirty the other clean in one engine but be opposite way around in another.


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 Post subject: Re: Low comp. & fuel
 Post Posted: Thu Feb 02, 2012 3:23 am 
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Joined: Sat Feb 07, 2009 4:12 pm
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Location: Adelaide Australia
You can certainly see droplets with a timing light and you can tell if you do things that make changes with a bit of skill. Photographing them with a flash is good and simple. There is expensive equipment to scientifically measure the size but for tuning lessons its not necessary. You can tell droplet size from a gas bench reading once you know the correlations.


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 Post subject: Re: Low comp. & fuel
 Post Posted: Sun Feb 05, 2012 11:47 am 
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Joined: Sat Jan 21, 2012 11:06 am
Posts: 31
There are really two main reasons to step up to race gas from pump gas . Number one is the increase in motor octane which gives you more protection against detonation . Number two is the ability to use that extra motor octane to tune for more power and torque . More motor octane allows you to increase timing and change jetting to produce more power . If your combination isn't experiencing detonation , and you're happy with the current power output , there is no reason to use anything more for fuel than you already do . If you're like all racers and want to go faster , then race gas will give you the ability to change the engine settings and tuneup to increase power without engine damage .
One other benefit to using race gas is the throttle response and torque up off of the corners that's designed into quality race gasolines . For some , that might just mean more wheelspin . But if you can hook the chassis up , it means getting a better jump onto the strtaight . For oval cars , road racing , etc. that's pretty important .

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Mike Croley
Master Dist. for Renegade Racing Fuels
www.renegadepro1.com


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 Post subject: Re: Low comp. & fuel
 Post Posted: Sun Feb 05, 2012 2:37 pm 
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Joined: Mon Oct 29, 2007 7:07 pm
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Location: Florida
Mike, what's your number? Only one I found on the web goes to a generic voice mail. I left a message...


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 Post subject: Re: Low comp. & fuel
 Post Posted: Sun Feb 05, 2012 3:17 pm 
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Joined: Sat Jan 21, 2012 11:06 am
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386-341-4308

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Mike Croley
Master Dist. for Renegade Racing Fuels
www.renegadepro1.com


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