3W and AVGAS
05-15-2003, 10:39 PM
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3W and AVGAS
Hi,
Wondering if anyone does this and finds any benefits.
Someone mentioned that the timing requires adjusting???I have a 3W 75 and 42 that i wish to run on AVGAS.
Wondering if anyone does this and finds any benefits.
Someone mentioned that the timing requires adjusting???I have a 3W 75 and 42 that i wish to run on AVGAS.
05-18-2003, 09:02 AM
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3W and AVGAS
Sure, but i'm not looking for power, just better, cleaner running.
With unleaded gone over here, our lead replacement petrol is crap and the unleaded costs just as much as the AVGAS. So I figure why not run AVGAS and get the lead as well, will help keep the carby lubed and not kill the engine. Its the same octane when run rich, so power is not improved.
I was more after terminal side effects.
With unleaded gone over here, our lead replacement petrol is crap and the unleaded costs just as much as the AVGAS. So I figure why not run AVGAS and get the lead as well, will help keep the carby lubed and not kill the engine. Its the same octane when run rich, so power is not improved.
I was more after terminal side effects.
05-18-2003, 11:30 AM
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3W and AVGAS
The only benefit of AV GAS is that its smell is less offensive than automotive petrol.
AV GAS, is specifically designed to prevent vapor lock at high altitude and contains additives and longer hydrocarbon molecules that work best in a high compression engine. Using this fuel in a low compression engine may increase engine deposits because cylinder temps and pressures (due to low engine compression) are not high enough to fully combust the fuel mixture. You may be able to get away with it by advancing the engine timing a bit, which in this case, could give you a little extra power but it wouldn't be worth it in my opinion.
I tried AVGAS on a 3W-24 and I found it impossible to hand start and had to use a starter or ether to get the engine running when it was cold. I ended up dumping the fuel in my motorcycle to get rid of it.
AV GAS, is specifically designed to prevent vapor lock at high altitude and contains additives and longer hydrocarbon molecules that work best in a high compression engine. Using this fuel in a low compression engine may increase engine deposits because cylinder temps and pressures (due to low engine compression) are not high enough to fully combust the fuel mixture. You may be able to get away with it by advancing the engine timing a bit, which in this case, could give you a little extra power but it wouldn't be worth it in my opinion.
I tried AVGAS on a 3W-24 and I found it impossible to hand start and had to use a starter or ether to get the engine running when it was cold. I ended up dumping the fuel in my motorcycle to get rid of it.
