CashDudeHomie

iTrader: (5)

Do you get less horsepower when running E85?

LesPaul

Yes.. the problem with the E85 is that it burns HOT!! you get less power thus leading to worse economy but you still come out ahead on gas prices

spitfire2332

not all 5.3s are flex-fuel. I think to get a flex-fuel 5.3 its like 3-500$ more than a non flex-fuel 5.3

SSlow 4.8

iTrader: (4)

im going to guess mid to low 15's... if its cool enough and w/ traction you might squeek a 14.9 out of it.

getchusum99

iTrader: (1)

My Buddy Had A Bone Stock , Not One Add One, With Is Tailgate And Spare,sxt Cab Step Side Silvy With The 5.3 And To My Amazement He Ran A 15.63!! And His Is An 01" And It Was A Cool Night... Were Did The 310hp Com Efrom? I Thought They Just Had The L33 Ho 5.3 That Had 330hp And Then The Stock 5.3 That Still Has 295? I Guess Im Lost.

spitfire2332

the HO 5.3 NEVER had 330hp, it was always 310hp

seadoo

my 04 5.3 3.73 loaded ECSB went 15.500 @ 86 STOCK.

now i have a drop-in K&N

gmtechnician

well i will post my times in a few hours. im headed to the track now. its about 300 degrees here in oklahoma. so well see what i can do.

shandy294

I don't know how you got a 14.6 with that...factory freak,maybe?

I ran a 16.12 at 87.38 on a 65-70 degree day (truck in sig) against a '00
5.3 rcsb with 3.42 , K&N FIPK and a hooker 2-in/2-out cat back. His was a 285hp version and ran a 15.52 at 87.45 . Alt. was about 760' ,hum. approx. 45%. It was in January.

KB

iTrader: (4)

I ran a 15.66 @ 86 w/ a 2.3 60ft last week in 88-90 degree heat and humidity w/ 600 miles on my 06 5.3l w/ 3.73's bone stock no weight reduction at all. I think if the weather was better and a little more practice launching she'd do a low 15 or better.