Max compression ratio on Sunoco 94?????
10-12-2004, 03:23 PM
#1
Max compression ratio on Sunoco 94?????
I have a 355 Chevy carburetted engine with cast iron Vortech heads. I'm looking for input as to the max compression ratio that I can run using Sunoco 94 pump fuel. I do not want to go to race fuel and this is in a C4 that is used for road racing. All input and guidance is appreciated.
10-12-2004, 04:03 PM
#3
Race Director
Member Since: Feb 2003
Location: Everyday you must choose between the pain of discipline and the pain of regret. Fredericktown, OH
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I ran 11.8:1 with steel Sportsman IIs on my 406, but NEVER when I was at the track. You could mix with a 110 or 112 if you can find it.
10-12-2004, 04:15 PM
#5
Melting Slicks
Originally Posted by Nuvolari
This engine is totally old school. Carburetted with no computers.
10-12-2004, 11:16 PM
#7
Heel & Toe
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I'd say 10.5 on the safe side but maybe a little more with a perfect tune. Vortech head have a good combustion chamber and a well placed plug so you can run a little more comp. than most heads. Also because of the good CC you don't need as much timing. 30 degrees is probably enough.
10-13-2004, 05:57 AM
#8
Le Mans Master
Originally Posted by scorp508
You can still get 94? They took it away from our pumps. 
That is what I was thinking. It happened up north first, then about 2 weeks ago it disappeared in our area.
