flex fuel performance
 

i just bought my 06 and found out it has the flex fuel motor in it can i still use all the normal performace bolt-ons from a 5.3L? and does anyone know how big the fuel tank is i put almost 23 gallons in it the other day and it was at a 1/4 tank it just does not seem right.

RE: flex fuel performance
 

probably a 8 gallon tank..

RE: flex fuel performance
 

i have an 06 Z-71 with the flex fuel and it has a 26gal tank (ext cab model).

yes most every bolt on the fits a normal 5.3 will work with a 5.3 flex fuel. they are the exact same motor with a few modifications to the computer to recognize the ethanol and some upgrades to the fuel system because ethanol is more corrosive.

i have a k&n 63 series, 40 series flowmaster and a hypertech max energy. most programmers except for a special diablo predator do not recommend using ethanol fuel with them. other than that rock and roll.

RE: flex fuel performance
 

so the onlything i have to worry about is not using e-85 if i get a programer you are saying? there is only one in sandiego any ways

RE: flex fuel performance
 

yea the only company that makes a programmer for e-85 use is the Predator. i cant get it here in VA anyways so i dont worry about it.

what is your truck 4x4, ext/crew cab? what kind of mpg are you seeing right now

RE: flex fuel performance
 

it is 2wd, reg cab with a long bed. i am getting 22.3 on the highway i dont do much city driving

RE: flex fuel performance
 

Hypertech makes a "Alternate Fuel" performance tune that can be used with crappy gas and E-85, BUT Predator has one too and it is much better.

RE: flex fuel performance
 

so would i be better getting one for the flex fuel or one just for a normal 5.3L. there in nowhere near me that sells the e-85

RE: flex fuel performance
 

If you ever plan on running E-85, I'd do my homework. If not, just get a Predator and either uninstall the "custom tune" when you run E-85, or have someone make you a tune just for E-85, but then you will have to switch back aqnd forth from one tune to the other when you use 85 or 87

RE: flex fuel performance
 

THANKS FOR YOUR HELP. HAS ANYONE TRIED THE BULLY DOG POWER PACK THE TRIPLE PACK?