Which fuel to run? 17-19psi

[mktbull]

I got a whipple pushing 17psi, 4lb lower and stock upper. it shows a lot more on the gauge in this cold weather (above 20). I usualy buy gas at golf+washington CLARK 100 octane 1/3 mix with 93. i still think that i should run more like 50/50 or even 75/25 100/93. what do you guys think. this thing screams in this weather i just dont want to blow anything up? thx

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[cyac5l8trfcar]

don't boost it in the cold air. Your taking a big risk by it not being tuned for that kind of psi. The fuel thing, I'd run 50/50 100/93octane's. Maybe toss a smaller lower on it for the winter (cheaper than a tune).

 

[hj16]

Either go half and half with the 100/93, or pulley it down for this cold weather.

 

[gnxs]

Hank is on the right track. I put in 33%-50% 100 octane in this weather with my current pulley setup.

Who did your tune? If it's done properly, your tune should account for variations in boost of a few psi. My RWTD tune has a consistent A/F whether I'm running 17 psi or 20 psi.

It sounds like you're providing enough octane for your combo (depending on how much timing you're running). Maybe some of our "tuner" sponsors will chime in.

 

[mktbull]

It was tuned by Streight Line Performance, I have two tunes programed, one is conserv. timming. second more agresive that i use during warm weather..

Hank is on the right track. I put in 33%-50% 100 octane in this weather with my current pulley setup.

Who did your tune? If it's done properly, your tune should account for variations in boost of a few psi. My RWTD tune has a consistent A/F whether I'm running 17 psi or 20 psi.

It sounds like you're providing enough octane for your combo (depending on how much timing you're running). Maybe some of our "tuner" sponsors will chime in.

 

[gnxs]

It was tuned by Streight Line Performance, I have two tunes programed, one is conserv. timming. second more agresive that i use during warm weather..

What is conservative, what is aggressive? Numbers?