elias_799

iTrader: (8)

is this normal ? i really do not mind paying for gas as long as my car is happy.
car does not run rich at all checked all the plugs and they are looking good.

i have 42lb injectors and a racetronix pump with hotwire kit, the fuel pressure is in the 60psi zone at idle

the motor is a 8.6:1 cr 347 running 10 psi of boost, sometimes spiking to 13. 94 octane and no meth

black98ws6ta

iTrader: (77)

Is this mostly WOT run's? It should be able to get much better gas mileage then that just cruising.

elias_799

iTrader: (8)

no mostly driving to work and back lol, car not running rich at all

black98ws6ta

iTrader: (77)

If it is just daily driving then it could definately be better. Maybe the car could take more timing? What tranny? No fuel leaks? Wideband in the car?

ddnspider

iTrader: (26)

same here, about 13mpg around town. On the highway it goes over 20.

elias_799

iTrader: (8)

tranny is a stock 4l60e

no fuel leaks

and unfortunately no wideband

AFASTYZFR1

iTrader: (55)

I get close to 200 miles to a tank.....with plenty of 15psi pulls

black98ws6ta

iTrader: (77)

Stock converter?

There has to be room for improvement in the tune or you have a mechanical problem resulting in low mpg.

elias_799

iTrader: (8)

stock converter

elias_799

iTrader: (8)

transmission and deferential oil is very clean, i do not see where i can have a mechanical problem. better not be the motor, it only has 4000miles on it. oil that comes out of that is clean also

BadgeZ28

iTrader: (28)

I get around 140 to a tank filling it at 1/4 tank level. That is 98% short trips around town.

elias_799

iTrader: (8)

^^^ i fill mine when the check gauges light comes on

RS_SS69

iTrader: (31)

I thought it was bad to run a aftermarket pump below a 1/4 tank of gas?

Could be burning the pump out faster than normal.

elias_799

iTrader: (8)

i am pretty sure my tank is clean, and the gas i get is clean, so i do not think i am burning my pump

uphigh07

iTrader: (48)

do you let the car sit and warm up as of a morning, i do and i will go into town and back and i get like 150 to a tank, if i dont let if warm up much i can usally go about 200

smok'nZ

iTrader: (160)

my tahoe only gets 220ish and its mosty stock i cant imagine what a 408 would do

SIC LSX

iTrader: (10)

your dumb if you have turbo with no wideband sorry. My car is N/A and i have one. I bet its rich! A wideband will tell ya what ya need to no I got 110 miles to 1/4 tank this weekend on hwy

Rickys S/C Z28

iTrader: (13)

that were im at also

elias_799

iTrader: (8)

i do not need a wide band to tell me if my car is running rich, i just occasionally check the spark plugs after a wot run. but thanks for being an *******.

elias_799

iTrader: (8)

yea, i let it warm up to 160 degrees, thats when my thermostat opens and the fans kick on. i kind of have to let it warm up because of the valve springs i have in the motor. they need to be heat soaked before you do any hard driving. otherwise there is a good chance of them breaking.

again i do not mind paying for gas, as long as it is normal.