nbextermueller
Well-known member
- Joined
- May 18, 2007
- Messages
- 909
- displayname
- Nic Bextermueller
As for the Gas Octane comments:
I tried a little experiment with my 128 with a 12hp on the other day.
Usually I run cheap 87 octane in it cause it's well, cheap(er). I mow nearly 2 acres of grass in about 2 hours with it. I mow in first gear just enjoying the ride, not quite at full throttle. I usually run through nearly a whole tank or sometimes just a bit past more.
I put 93 in the other day (I ran the tank dry the mow before) to see what would happen. I did the same mowing again. It ran much smoother and I only used just past a half a tank of gas.
I'm not sure why, but it clearly likes premium better.
As for race fuels in pullers. It's always been my opinion that high octane fuel (100+) is only needed if your going to use high compression, 11.5:1 or higher and alot of timing with it. like 28degrees or more. If your not messing with those ranges, then your only hurting yourself using Sunoco 112 octane cause it smells good.
Don motors running 9:1 with 25d isn't much more than your run of the mill chevy 350. Running 93 at those setting is not needed.
Just as a note, try running 93 octane in a 12.5:1 compression, 32 degrees advanced, big custom cam, 4500+ rpm air cooled puller and see what happens. even forged pistons vaporize in 300ft...
Sorry for the long post. but I thought I'd trow in my 2cents.
I tried a little experiment with my 128 with a 12hp on the other day.
Usually I run cheap 87 octane in it cause it's well, cheap(er). I mow nearly 2 acres of grass in about 2 hours with it. I mow in first gear just enjoying the ride, not quite at full throttle. I usually run through nearly a whole tank or sometimes just a bit past more.
I put 93 in the other day (I ran the tank dry the mow before) to see what would happen. I did the same mowing again. It ran much smoother and I only used just past a half a tank of gas.
I'm not sure why, but it clearly likes premium better.
As for race fuels in pullers. It's always been my opinion that high octane fuel (100+) is only needed if your going to use high compression, 11.5:1 or higher and alot of timing with it. like 28degrees or more. If your not messing with those ranges, then your only hurting yourself using Sunoco 112 octane cause it smells good.
Don motors running 9:1 with 25d isn't much more than your run of the mill chevy 350. Running 93 at those setting is not needed.
Just as a note, try running 93 octane in a 12.5:1 compression, 32 degrees advanced, big custom cam, 4500+ rpm air cooled puller and see what happens. even forged pistons vaporize in 300ft...
Sorry for the long post. but I thought I'd trow in my 2cents.