Octane Booster safer than Aviation gasoline?
Posted April 16, 2004 - 10:08 AM
Posted April 16, 2004 - 10:43 AM
stick to avgas IF you can get it.
Posted April 17, 2004 - 04:24 PM
Posted April 19, 2004 - 10:46 PM
Klotz claims to use a tetraethyl lead substitute. They won't tell me what's in it (probably an alcohol derivative), and it does darken plastic gas tanks. Most use MMT which will cause long term engine damage.
Here's some good info on all octane boosters and av gas: OCTANE
Check out this interesting info on toluene as an effective, safe and cheap octane booster: toluene
I've considered adding a cylinder base gasket to lower compression...not an easy task.
If disconnecting the TPS doesn't help, I could slot the ignition's pickup coil to retard ignition timing .
It pings between about 4000 and 7000 RPM, at any load/throttle opening on 91 octane gas (best local pump gas).
Posted April 20, 2004 - 03:26 AM
Have you checked the ignition timing? It could be off. Also check for air leaks in the intake and exhaust, spark plug heat range or carbon build-up in the combustion chamber.
Posted April 20, 2004 - 07:42 AM
Can the ignition timing be adjusted without removing the flywheel and slotting the pickup coil's mount? Today's '91' octane gas doesn't seem to live up to its claim. If I check the head for carbon or sharp edges, do I need to replace the $50 head gasket?
Posted April 21, 2004 - 02:24 AM
Posted April 21, 2004 - 02:27 AM
Posted April 21, 2004 - 10:34 AM
If I check the head for carbon or sharp edges, do I need to replace the $50 head gasket?
Just my two cents here. I learned a long time ago, Do it right and do it once. Nothing worse than having to do a whole project again just because you took a short cut. Good luck.
Posted April 21, 2004 - 04:03 PM
I will start by trying backing off the TPS to reduce ignition timing advance when I take it out for 1st time this season on the weekend...
Posted April 25, 2004 - 01:46 PM
"It raises octane 2-1/2 numbers per ounce, up to 10 numbers. So I'll try 1.5 ounce per gallon with 91 octane fuel =94.75 for about $0.25+ per gallon."
But actually, it would only be 91.25. 10 numbers would make 91 octane into 92. So you see it's hardly worth the price of the stuff.
If you need higher than premium pump gas, go with race gas.
Posted April 25, 2004 - 03:02 PM
At any rate, retarding my ignition timing was enough to avoid the need for more octane.