"thats plenty of fuel, i ran the same setup with the stock injectors and i could make the car stumble it was so rich."



I don't understand, you were running what setup (a to4, intake, exhaust and streetport) and you were running rich with 550cc injectors?



Everyone told me I would lean out if I didn't go with 720's all around



Also I don't want to mess with fuel rails, pressure regulator or anything else like that, thats why I'm going 720s.

I think I should be safe with the 255lph pump, s-afc, and injectors.



ed

 

yeah u should be safe.

 

i was running stock injectors with an fd pump, hybrid stock turbo, full exhaust, intake @11-13psi and it was so rich it would stumble (i had an fcon) when the fcon was turned up



mike

 

j9fc3s, oh ok now I understand.



1Revvin7, I see you are running a hybrid to4 also.

What's your fuel setup like?

Do you have any other mods?



ed

 

I had a small hybrid (TO4B H3 wheel in a machined stock comp housing), stock engine, 550s/720s, stock ic, full exhuast, walboro, and the fpr plugged into the intake, and it was **** rich over 3800. Luckily my turbo didnt really come alive until about 4000, so i wasn't stressing the primaries so much. I think thats how I got away with no fuel controller. I hear lots of people blow theirs before the secondaries come on.



Anyway, your setup sounds fine.

 

So I should go with the 720's in the primary like I said.

With the s-afc I should be able to tune them in so they don't run too rich right?



ed

 

Yeah you are on the right track.



In all my rambling I forgot to mention I was running 14 psi.

 

walbro, aeromotive fpr. 6an lines, tapped fuel rails, 1600cc secondaries,

 

sometime you just get lucky with fuel setups. I ran 1600cc's with the stock ecu and dynoed at 265rwhp with a 12.1 ARF across the board. 720's with a super AFC is good setup.

's

 

how did u manage that? with a piggyback?