I run a mixture of 110 race fuel and premium unleaded. 50/50.
fuel
Le Mans Master
Joined: Sep 2000
Posts: 5,635
Likes: 4
From: Orlando Floriduh
I run max lead 2000 (real lead) I mix the amount it take to get approx. 100 octane. ( in Amoco 93) No pinging in warm weather, and about 20% gain in fuel milage, got rid of exhaust odors to not to mention how much better it runs.
Melting Slicks
Joined: May 2004
Posts: 2,084
Likes: 1
From: Aussie expat in Saudi Arabia
Originally Posted by biggvette
Just curious what fuel people are running in there 427's.
Out here in Saudi, it's is supposedly unleaded fuel, but I'm running a warm 400 small block in my '82 and without any timing mods or anything, the fuel out here runs beautifully. I mentioned the AVGAS above because the fuel here smells EXACTLY like the 100LL we used to use...
I've no idea what it actually is, but it isn't like unleaded I've used anywhere else in the world!
Melting Slicks
Joined: Oct 2000
Posts: 3,023
Likes: 2
From: TEXASTEXASTEXASTEXAS TEXASTEXASTEXASTEXAS
St. Jude Contributor
I use the real lead, too, and I've mixed in blue avgas in the past and that works good (though it's technically illegal to run avgas in a car & you need to have a connection at the airport usually to get the stuff). Truth is, once I replaced my slipped harmonic balancer, which was causing me to set the timing too far advanced, I run fine on plain old Shell 93 octane for nine months out of the year, and only need the extra octane in the summer.
JB
JB
Thread Starter
Advanced
Joined: Aug 2004
Posts: 80
Likes: 0
From: Okeechobee Florida
Ok, Thanks.
I just read on the net that it is better to buy race fuel than to do it yourself. "Mix of toluene(octane boost) and pump gas costs you performance and throttle response due to slow burn speed". Thats what it said.
I was thinking of buying 103 octane and mix it with pump gas and trying to make it around 100 octane. whatcha think.
I just read on the net that it is better to buy race fuel than to do it yourself. "Mix of toluene(octane boost) and pump gas costs you performance and throttle response due to slow burn speed". Thats what it said.
I was thinking of buying 103 octane and mix it with pump gas and trying to make it around 100 octane. whatcha think.
Melting Slicks
Joined: Oct 2000
Posts: 3,023
Likes: 2
From: TEXASTEXASTEXASTEXAS TEXASTEXASTEXASTEXAS
St. Jude Contributor
I think that's just fine. The only problems with it are that race gas is hard to get for most people unless you live near a track and it's expensive as hell. If you can get your hands on blue avgas, it's half the price of race gas, and the real lead (which isn't toulene, it's tetraethyl lead) is even cheaper per gallon.
JB
JB
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Pro
Joined: Sep 2002
Posts: 690
Likes: 1
From: near Memphis TN
Originally Posted by biggvette
Ok, Thanks.
I just read on the net that it is better to buy race fuel than to do it yourself. "Mix of toluene(octane boost) and pump gas costs you performance and throttle response due to slow burn speed". Thats what it said.
I was thinking of buying 103 octane and mix it with pump gas and trying to make it around 100 octane. whatcha think.
I just read on the net that it is better to buy race fuel than to do it yourself. "Mix of toluene(octane boost) and pump gas costs you performance and throttle response due to slow burn speed". Thats what it said.
I was thinking of buying 103 octane and mix it with pump gas and trying to make it around 100 octane. whatcha think.
Anyways to answer your orignal question I would (and do if I run at the strip) use race gas and mix it in with 93 octane because at least you know you still have all those additives for the street.
Last edited by SpyderD; Aug 10, 2004 at 02:32 PM.
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
My 11-1 427`s use 93/94 premium and no additives at around 36 total lead, no vacuum advance. The big guys, L88`s and the LS7 at 12.5-1, I use aviation 100. Also with out vacuum and all run great. 
Race Director
Joined: Mar 2001
Posts: 11,601
Likes: 0
From: San Francisco CA
St. Jude Donor '07
Originally Posted by biggvette
ok thanks guys. By the way thats my car in the picture. Hugo Prado did a corvette print of it. Seriously.
