AV fuel in a quad?
#11
11-20-2003, 02:16 PM
#12
11-20-2003, 02:25 PM
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AV fuel in a quad?
Originally posted by: BeerSmurf
" It also has a lower combustion temp. which mean detonation in a motor not designed for that kind of fuel. "
I don't know where you got this.
Avgas has better anti detonation properties than pump gas.
Unlike auto gas, Avgas will be consistent from batch to batch.
Avgas keeps longer than auto gas.
Avgas smells better than car gas.
Cool blue color.
However
Avgas is more expensive than auto gas so why spend the money if you don't need the extra octane?
Avgas contains lead, so you do not want to use it in any motor with an O2 sensor.
Avgas doesn't vaporize as easily as auto gas, which helps prevent vapor-lock but may make starting more difficult in very cold weather.
I have run Avgas in many vehicles with no problems.
ATC 200X
ATC 350X
ATC 250R
KLR 650
TRX 350
KFX 400
XR 100
NX 650
Blaster
Banshee
'67 cougar
" It also has a lower combustion temp. which mean detonation in a motor not designed for that kind of fuel. "
I don't know where you got this.
Avgas has better anti detonation properties than pump gas.
Unlike auto gas, Avgas will be consistent from batch to batch.
Avgas keeps longer than auto gas.
Avgas smells better than car gas.
Cool blue color.
However
Avgas is more expensive than auto gas so why spend the money if you don't need the extra octane?
Avgas contains lead, so you do not want to use it in any motor with an O2 sensor.
Avgas doesn't vaporize as easily as auto gas, which helps prevent vapor-lock but may make starting more difficult in very cold weather.
I have run Avgas in many vehicles with no problems.
ATC 200X
ATC 350X
ATC 250R
KLR 650
TRX 350
KFX 400
XR 100
NX 650
Blaster
Banshee
'67 cougar
#13
11-20-2003, 03:46 PM
#14
11-20-2003, 03:51 PM
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11-20-2003, 03:52 PM
#16
11-20-2003, 06:17 PM
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#17
11-20-2003, 06:52 PM
AV fuel in a quad?
Unless you're high running octane race gas now, AND NEED THE HIGHER OCTANE, you will not get better performance or more power from it. Higher octane offers one advantage, less likely to pre-detonate. So, if you're not detonating on premium, you won't detonate with race gas but you won't make more power either. Actually, being harder to burn, you may have a less complete burn, and make LESS power. Same thing w/ regular gas. My Jeep doesn't need premium, and I have nothing to gain by using it, so I run regular. However, my Porsche MUST run premium, or it will detonate, so it does benefit from high octane.
BUT if you run high octane, since it is less likely to pre-detonate, you can run a higher timing advance which will make more power.
So...don't run high octane alone; it'll do nothing. But if you want to run it, then you can run higher compression and/or advance timing which will make more power.
Colby
BUT if you run high octane, since it is less likely to pre-detonate, you can run a higher timing advance which will make more power.
So...don't run high octane alone; it'll do nothing. But if you want to run it, then you can run higher compression and/or advance timing which will make more power.
Colby
#18
11-20-2003, 07:24 PM
AV fuel in a quad?
"maybe you can answer my question of what octane to run with ratios. 11.1 and 12.1"
It is not possible to directly correlate a given compression ratio to a specific octane rating.
Many factors affect required fuel octane rating.
Combustion chamber shape, piston shape, bore diameter, RPM, mixture/jetting, temperature, timing, manifold pressure, engine load, etc. all effect the onset of detonation.
You are going to need to see what works for your particular application.
I wish there was an easy answer for you.
If you engine builder has experience with your setup he would be the best source.
It is not possible to directly correlate a given compression ratio to a specific octane rating.
Many factors affect required fuel octane rating.
Combustion chamber shape, piston shape, bore diameter, RPM, mixture/jetting, temperature, timing, manifold pressure, engine load, etc. all effect the onset of detonation.
You are going to need to see what works for your particular application.
I wish there was an easy answer for you.
If you engine builder has experience with your setup he would be the best source.
#19
11-20-2003, 07:30 PM
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#20
11-20-2003, 08:18 PM
