Need opinions on a wild 4.8L setup

http://i45.tinypic.com/2iu27au.jpg

http://i50.tinypic.com/mme5fo.png


Ok here are the dyno sheets one this 09 4.8L RST, 1st one is NA specs custom grind (specs can't be given by vender(venders policay) 1 3/4" long tubes, dual 3" with X-pipe, 3200 stall, UD pulley, MSD wires, and K&N intake the second sheet is with nitrous so the plan is get the 243s ported and polished and a vic jr inatke with an elbow will it be ok or no? it will be getting 4.56 gears and a 3600 circle d stall please share your opinions please what would be a good thing to do. Thanks

Honestly think that the 4.56s would be too much gear for a 4.8 unless your planing on having big rims....stick to some 4.10s or 4.11s n preferably i would go with a yank stall instead of a cirlce d..

Quote:

---

Originally Posted by badboy956

Honestly think that the 4.56s would be too much gear for a 4.8 unless your planing on having big rims....stick to some 4.10s or 4.11s n preferably i would go with a yank stall instead of a cirlce d..

---

ok ok, these NNBS RSTs come with 22s on a 305/40/22 reason 4.56s came to mind was most people say they wake these heavy trucks up but will consider those 4.10/11s

id go holley high ram , and spun the fug out of it

Go higher then 456 and go least 1k more in rpm on stall if ya want it to move out. Holley intake is where its at

4.88, holley high ram, 4k stall. Sounds like fun.

Quote:

---

Originally Posted by RS/SS 4.8

4.88, holley high ram, 4k stall. Sounds like fun.

---

This

Quote:

---

Originally Posted by RS/SS 4.8

4.88, holley high ram, 4k stall. Sounds like fun.

---

This sounds good also but its gnna be a gas chuger lol

Yeah its a weekend and would like to drive it on the highway at least 2 times out of the week, so what about porting the heads and the holley intake with the 456s and 3600 stall? No bueno? The truck is a crewcab fyi lol

Never mind porting the heads. For a what a set of CNC ported, milled brand new heads cost now, I don't see the cost effectiveness. Unless you know head porting like the back of your hand. And 4.8s love to rev, in a heavy ass crew cab you're really gonna have to take advantage of that. Lots of gear, lots of stall, spin the piss out of it.

Quote:

---

Originally Posted by Frenchy

Never mind porting the heads. For a what a set of CNC ported, milled brand new heads cost now, I don't see the cost effectiveness. Unless you know head porting like the back of your hand. And 4.8s love to rev, in a heavy ass crew cab you're really gonna have to take advantage of that. Lots of gear, lots of stall, spin the piss out of it.

---

Yeah the cost is not the problem, just wondering if they'd help thinking of spinning it up to 7500rpms

Oh definitely.

Cool good to know. Thanks

Quote:

---

Originally Posted by badboy956

This sounds good also but its gnna be a gas chuger lol

---

lol my Z71 is a gas guzzler :( i say youre in the wrong hobbie if youre worried about gas!! lol



youre moving a heavy truck with a small cubic inch engine :( no thoughts on FI ? this actually changes alot concidering the weight of the truck, unless you plan on gutting it

Quote:

---

Originally Posted by skeet

lol my Z71 is a gas guzzler :( i say youre in the wrong hobbie if youre worried about gas!! lol



youre moving a heavy truck with a small cubic inch engine :( no thoughts on FI ? this actually changes alot concidering the weight of the truck, unless you plan on gutting it

---

I'm help out a close friend he wants to push the 4.8 to the max and with a 150shot, boost (turbo) will come afyer he finishes school and yes truck will be gutted when out to play