[cheyenne580]

I'm kinda stumped here so i hope someone can help me to understand.Here's the deal.

I was running Sunoco race fuel on Saturday and i ran out so i switched to C16 that i had.Ok this is in a BBC Blown and injected motor.If i understand this right the C16 is a slower burn fuel that is making it run and idle very rich.If i'm wrong please tell me.I plulled the barrel valve apart and no sign's of debree.So i thought my enderle fuel pump was eating it self up and getting weak but that was not the case.The motor just does not responed like it did.

Any help please.

 

[Mike Beck]

Sunoco what? I can switch between Maximal and C-16 with no changes. When I run C-12 or Supreme I have to richen it up a little.

 

[bob g]

easiest way to see if theres a problem put other fuel back in,see if problem persists

 

[Pooch565]

Sunoco Supreme is a bunch lighter than the C16 plus the Sunoco is about 7 to 8 octane points less. It will go fat on the C16. You'll have to decide which fuel you want to run and tune for it. The C16 will work great, you just have to tune for the C16.