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Sep 21, 2007 | 09:38 PM

#31

"Beemer Nut"

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From: "Islander"

There is 76 Union 110 octane leaded 3.8 grams per gallon race fuel out there at your local speed or cycle shop. I run it in my 70's motorcycles then come home on Redlines lead substitute additive.
Leaded makes for that nice light gray color inside the pipe.

Sep 22, 2007 | 06:13 AM

#32

FFR428

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From: CT

I'll look into that Carl. Good bud of mine owns a bike shop. Thanks!

Sep 22, 2007 | 08:40 AM

#33

tomw

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From: suburban atlanta

When I was young and stupid, rather than old and ..., I used to work at a Sunoco. The owner used to take 190 at one pump, and feed it into another tank in the ground. He said that one was lower than the other, and it would slowly leak back into the original.
I don't think that was the case... now. I think that the 190 was used to dilute the higher priced spread, and up the profits. I remember one guy that raced Mini Coopers back then. It had two fuel tanks, and he'd have me put 3 gallons in one tank and 5 gallons in the second tank. Expecting, of course, the 260 to keep his engine from pinging on the race course. If I knew then what I know now...
tom

Sep 22, 2007 | 08:58 AM

#34

baddad457

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From: south louisiana

Blending two different octane fuels is exactly how they make the middle grades. 89 octane midgrade is a blend of 35% 93 octane Premium and 65% 87 octane regular. I was hauling fuel for two years and on some racks we hauled from, we had to blend the midgrade ourselves when loading it. One rack was so antiquated (a Valero refinery) we actually had to use separate arms for each fuel, you used a calculator to figure how many gallons of each then loaded one , then the other. Most stations are actually making a little more profit on mid grade, the price spread of ten cents per gallons reflects a 50/50 mix for midgrade, but you get 89 instead. If you manually pump equal amounts of both reg and premium, you pay the same price but get 90 octane.

Sep 22, 2007 | 10:19 AM

#35

"Beemer Nut"

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From: "Islander"

That would be a Cycle Gear store, in my area you can get three different race fuel octanes in 5 gallon cans. Remember the lable states "for off highway use only or race track". I believe these days the highway is a race track.

I get a kick out of one neighbor that believes he can add one bottle of "104" to his 24 gallon tank and boost 89 up to 93 octane.

Last edited by "Beemer Nut"; Sep 22, 2007 at 10:22 AM.

Sep 22, 2007 | 12:55 PM

#36

FFR428

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From: CT

Carl what are the different octane ratings? Just so I know the what to look for. My bud builds everything from classics to customs....even custom scooters LOL. He's a great mechanic and used to do high end exotics. Now he followed his lifelong dream into bikes.

Sep 22, 2007 | 04:28 PM

#37

"Beemer Nut"

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From: "Islander"

Over in my area I used to get Union 76 110 leaded race fuel from a Cycle Gear store they no longer supply it. Now they carry VP fuel in 110 for $48.99 for 5 gallon can as well 112 for $49.99 a 5 gallon can. They didn't have a clue about it having lead or how much if it had any.
I would check your local speed shop.
Somewhere in my files (good luck) and posted on this forum was a thread where you enter all your motor specs and thermostat temp and it will give your dynamic compression as well the minimum octane required.
Just a stat temp change allone will require a different minimum octane number.

Check this out it may answer a few of your questions, read it start to finish a few times you'll be better educated.

http://www.popularhotrodding.com/tec...ech/index.html

........Carl.....

Last edited by "Beemer Nut"; Sep 22, 2007 at 04:48 PM.