Quarter mile times? Please :D
Apr 8, 2008 | 10:02 AM
#21
Your time estimates seem a little off to me.
I have NEVER seen a 5.3 with just a tune, CAI and exhaust run 13s. Much less fairly often. High 14s-low 15s seem to be the norm for that setup.
I have owned 2 5.3 trucks, an 04' RCSB with tune, intake and exhaust with 3.73s that ran a 14.7.
My current truck is a 06' ECSB with the exact same setup, and it runs 15.0s, but with 20in wheels.
I just dont see 13s from a 5.3 without going into the engine, or running a shitload of stall and gutting the truck.
As for the 4.8s, id expect them to be 5 tenths slower with the same mods.
I have NEVER seen a 5.3 with just a tune, CAI and exhaust run 13s. Much less fairly often. High 14s-low 15s seem to be the norm for that setup.
I have owned 2 5.3 trucks, an 04' RCSB with tune, intake and exhaust with 3.73s that ran a 14.7.
My current truck is a 06' ECSB with the exact same setup, and it runs 15.0s, but with 20in wheels.
I just dont see 13s from a 5.3 without going into the engine, or running a shitload of stall and gutting the truck.
As for the 4.8s, id expect them to be 5 tenths slower with the same mods.
Apr 8, 2008 | 10:53 AM
#22
TECH Apprentice
Joined: Jan 2008
Posts: 324
Likes: 0
From: Fresno, CA
My 4.8 RCSB went 15.25 with stock tuning, magnaflow muffler and 3.73 gears with posi, and stock air cleaner. Thats with stock wheels and a 27" tire. With nitrous its going 14.2 and thats with 20's.
Apr 8, 2008 | 01:37 PM
#23
Launching!
Joined: Nov 2002
Posts: 207
Likes: 0
From: S'port
I wouldnt say that at all. People have proven tha the 4.8 has much potential, and is very tough. I was mostly responding to the claims of 13s with a tune, CAI and a catback.
As for the 4.8, all things being equal, same truck, same mods, same tranny, its about .5 slower than a 5.3. Obviously these are not exact numbers.
Apr 8, 2008 | 04:21 PM
#25
Launching!
Joined: Nov 2002
Posts: 207
Likes: 0
From: S'port
Apr 9, 2008 | 04:47 PM
#26
i guess?
i thought about adding a throttle body spacer to really up the anty?
my brother actually commented that i had put too much $$ in mine already, so i figured it up. with all the parts/labor/tuning i have about $3000 tied up in the performance aspect. not bad though, when you consider it has dropped way over 2 full seconds in the 1/4, maybe closer to 3... i never ran the 1/4 stock.
Apr 12, 2008 | 03:31 AM
#29
Launching!
Joined: Nov 2002
Posts: 207
Likes: 0
From: S'port
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