quadrajet 455ho

[gearhead63]

when on the 2 step afr is 18-19 but afterreleasing the 2 step afr goes from 10.5-12 just before shifting to second gear. poe system blockt. best 60 foot 1.39 best et 10.69 in e/sa should change to 69 pri jet for the next race and but a gopro camera under the hood over the carburator.

[ss3011]

Originally Posted by gearhead63

when on the 2 step afr is 18-19 but afterreleasing the 2 step afr goes from 10.5-12 just before shifting to second gear. poe system blockt. best 60 foot 1.39 best et 10.69 in e/sa should change to 69 pri jet for the next race and but a gopro camera under the hood over the carburator.

You may not be too far off , your et and 60 ft is pretty darn good . Tweeking the primary jets will let you see what the combo wants . Also , my 455 HO wants around 40 degs of timing , what are you running ?

[gearhead63]

it likes 36-37 degrees best but we are using vp motorsport 109 are not allowed to use leaded fuel here in Europe. our goal is go 1.1sek under index to be a little faster than the other e/sa cars here.

[ss3011]

Originally Posted by gearhead63

it likes 36-37 degrees best but we are using vp motorsport 109 are not allowed to use leaded fuel here in Europe. our goal is go 1.1sek under index to be a little faster than the other e/sa cars here.

The VP 109 has plenty of octane for your engine , I would warn you that because that fuel has no anti corrosion additives it will rust the valve seats . You would need to fog WD-40 or some other spray lube into the intake after you are done racing for the weekend .

[gsa612]

What is the elevation of the track you run at ?. gsa612