CHILLLLLL

iTrader: (3)

that looks petty badass. thanks!

Silver05Rst

Ty to everyone for all your input!!!!

I got the nelson tune in today, and its awesome! No problems, didnt need to relearn/reset anything, and since im a big need for speed guy (hey arent we all?) I espically like being able to go 125+ over the limited 100... LOL!!! (p.s. thats the frist thing that was tested)... they upped my rev rpm from 5500 to 6000. and i can tell theres a little more response in the pedal from the TM taken away...


I definitally want to put 4.10's in the rear's but should i put a bigger rear end in it before? and since its a light duty truck do i need to worry about snapping driveshafts and such?


Im also pricing 5.3 engines too...

heres my all out goal...


-5.3 engine swap
-transfer the cold air intake
-cam it/new springs/rockers etc...
-supercharger
-Ford 9in rear end with 4.10 gears
-upgraded suspension
-4L60E tranny swap
-retuned
-NOS (but thats the very last thing, even if)


Thats where I want this truck to go... but having a wife and a kid puts a HUGE slow pace to this, lol...

Silver05Rst

also, Red u said front mounted Turbo... anyone know any good sites where i may find one at for the 4.8?

also also, having trouble picking better cam... dont know much about them, so which u think be better... the 54-535-11 or the 54-450-11? Both are part numbers through summitracing.com

jadaven

iTrader: (1)

I had mine tuned by Blackbear last week. I've also tested the 100+. Got to 108 and let out of it. The top RPM limit is set to 6300. I really haven't tested much on it. I can say it drives a lot smoother, the idle is a lot better and lower. The MPG is 19.5 all highway.

It's pretuned for LTs that I need to put on.

jadaven

iTrader: (1)

54-535-11: I like this one better. I've seen a few that I've been looking at but they are 220/220, 216/220 or a 221/221. I don't have the part numbers but I've seen them pop up here and there in the for sale forum.

CHILLLLLL

iTrader: (3)

why bother swap a 5.3 in it? just do a 6.0

1blueSS

iTrader: (1)

Name: Rob Melcher / Foose04
Year: 2004
Make: GMC
Model: Sirria
Body: rcsb
Engine: Stock 4.8
Tranny: NV3500
Drive: 2WD
Mods: Cam, MP70 turbo (67mm,P-trim, .81a/r T4)
Correction: SAE
Dyno: DynoJet
Date 6/8/2010
HP: 528
Torque: 528


You can get some good performance from the 4.8. Look at foose04 stats. A 4.8 with a turbo making good #'s



__________________

2004 GMC RST: 528HP/528TQ

NyteSnyper

Yes, you do need to worry... They had a 100mph limiter on these things for a reason. Im not making power anywhere near where i've seen guys twisting and snapping shafts, but I've seen plenty of them come loose from the ujoints at 110 or so be it on the street or on a dyno, and mine let go on me at 150 (i was a non-believer til then, my limiter sits nice and tight at 110 now and i had the stock 3.73 with 31" tall tires)

I currently have a stock ds in there now, but a highspeed balanced aluminum one is on the way in as we speak along with the tubs and all that good stuff.

As for the engine stuff, i second the skip on the 5.3 notions. If you're going to shell out money and all that time to swap in a motor, you may as well get a 6.0 as even an lq4 can be usually had for the same or slightly more than a 5.3 (we're talkin wrecking yards here)

I also don't think i recommend a 4l60. If ur planning on boost, idk if even a level 4 or 5 can hang? Of course I dont know much about automatics, but I think a 4l80 with upgraded internals may be more fitting? Maybe some others that are more knowledgable on this can chime in.

CHILLLLLL

iTrader: (3)

**** that...t-56 that bitch lol

Silver05Rst

another question from the illiterate engine dummy...

I saw in a youtube video (http://www.youtube.com/watch?v=q5iLNAUTbH4) that this guy put a Ls2 intake on his 4.8L... Is that simply a bolt on or if u change the intake to an Ls2 will u need to replace anything else?