which is faster- VP C-11 or C12

[Rich Biebel]

When I raced my last Stocker......

I used some Sunoco Purple, C-12 and C-11at various times

I felt like the C-11 was a little better but not really anything more than a couple ticks at most....

I brought some fresh Sunoco to one race....It passed on 1 run and failed on the next?? I even had the fuel in the jug tested before I ran the car. It was ok.

I flushed the fuel system as good as I could....bought a new jug and C-11....It passed.

Bought C-12 at Cecil County from the tracks supplier and it was right out of his sealed drum..... On the very next run it failed and so did a lot of other racers that day using C-12 from what I saw. I showed the NHRA fuel check man the receipt as I used a CC to buy the fuel an hour earlier. I think they let everyone slide on that issue at that race. Seemed to me like they knew there was some kind of problem there.

After that event I drained my fuel system and cleaned out my fuel cell before every event. Bought fresh C-11at the start of the race and never had it fail.

The C-11 stinks bad in a trailer if you have a cell with an open vent.
I wanted to add a valve on the fuel cell vent to close it and reduce that issue as it can't be good to let the light ends of the fuel vaporize like that....

Last time I ran that car.....I ran Sunoco at a local bracket event and switched back to C-12 for an NHRA race and it checked fine both times it was checked......The fuel check issues with racing a Stocker is not fun.....especially when the stuff costs $10-12 a gallon!