What brand and Octane should I look for to use when I am spraying a 150 shot on stock computer settings...I can get 94 octane at the pump and Leaded 110 @the track will leaded mess with the O2 sensers if I run like 5 gal 94Unleaded and 5 gal. 110 Leaded?I am working on getting Unleaded but might take a few months to find around my area.. Thanks for any help Sean P.S I am showing some knock on my datamaster so thats why I want the fuel .. to see if it is false or ture.. I dont use any timing retard either..

 

I run Sunoco 104 unleaded. Won't hurt the 02's like leaded gas does.

 

I run 104 unleaded. Either VP or Sunoco...

the 110 is probaly too much,if you can find it,Torco has a concentrate for unleaded fuel that cranks up the octane(no it's a common "octane booster").

 

Where can I get this stuff at and what is the price on it.. I was thinking the 110 was too high and would probally slow me down..I just want something that would stop a little minor spark knock...Thanks For the Help Do you guys think one time use of 5 gal.. 110 would hurnt anything I have new O2's on the way...So I am not affriad of hurting them...

 

I dont know where you can buy it online. My buddy is a Torco dealer. Have you tried a search?
We have used the Torco concentrate successfully in my friends 91 Z w/406+150 shot.

 

I always run with 103 VP.... I heard now VP has 110 octane unleaded... or maybe thats just out here

 

With a 150 shot, you should be pulling around 4 deg. to start with. Do you have any kind of aftermarket programming? Hypertech advances the timing over stock, not good with spray.
At a 150 hp level, 92 to 93 octance should be plenty. We've been spraying a 383 with a 250 shot for over 3 years on pump gas.. occasionally he adds some NOS brand octane booster at the track for a 300 shot pass.. but not that often

 

the car is running on the stock program and no timing retard.. I ran it last night and it pulled some timing when shifting..I am going to get LT1 edit or tuner cat and mess around with that and see what happens...