? On changing gas
 

Switching VP octanes, how long for new octane to pass fuel check
Ran and dry, and then filled with fresh & new

Thanks for any opinions

Re: ? On changing gas
 

I have pumped my fuel cell dry, and refilled with the new stuff. I have a fuel line for that. I pump the old fuel into a jug, pour in the new fuel, pump a quart or so of that to flush the lines. Has always passed just fine after that.

Re: ? On changing gas
 

If you have foam in the fuel cell you need toremove it. It holds enough of the old fuel to fail you. Had it happen to me.

Re: ? On changing gas
 

I have no foam in mine for that reason. I should've mentioned that. Sorry.

Re: ? On changing gas
 

Randall,

I have changed from C-11 to 12, now on 14 with the same foam in the cell with no issues. I drained the tank and lines completely, and then emptied about a 1/4 gallon from up front to try to get it all out. Now, I did run at a local combo race with the new fuel each time I changed, so the car had a chance to clear itself out before I ran at a divisional or national where I was checked.

Jason

Re: ? On changing gas
 

Thanks, that's what I was hoping to hear, as I did not take foam out. Planning on T & T Wed to clear it out....we'll see. Going from 11 to 12

Re: ? On changing gas
 

Hey Randall & Jason - If you're willing to share the information, why did you (or are you going to) move away from C-11? I think your LS combination might benefit, Jason, but Randall, your 265 should like C-11 better than C-12, based upon conventional wisdom. Whadda you guys know that the rest of us don't? :)

Re: ? On changing gas
 

I would expect his 265" to prefer C11. My LT1 does, and it has more compression. Mine likes to be just a tick richer on C11. Like 12.9/13.0 vs 13.2~.

Re: ? On changing gas
 

Just an update, passed fuel check in Topeka, pumped C-11 out, did not do anything to the foam, put C-12 in
Acquired a 498CI 1969 Camaro which needs C-12, so I just bought 1 barrel, no tricks, just cheap

Anybody see anything with C-25? Just curious