willhorne22

I'm building a lq4 and 4l80e. This will be going into my 06 1500 crew cab.

What I do know:
I've got 4.56 gear ratio. 35" tires.
I have a winch and 20" wheels and a 9.5" 14bolt. Truck probably weighs 5900 or 6100 lbs
Motor will be factory crank.
08 LY6 rods and pistons.
317 heads milled
NNBS intake and throttle body
4l80e will be running Jakes stage 2 rebuild kit


I've done a lot of reading and I've gotten suggestions before, but they were provided when I had less information. No matter how much reading I do, I have a hard time feeling comfortable with my choices. Please recommend some camshaft, torque converter combos that would work well with my setup.

swathdiver

Why not a stock LQ9? Is it easy to use Gen IV parts on a Gen III computer system? Without knowing more myself, I'd be inclined to stay within my generation to keep things as simple as possible.

Just bought one of the many books written about these LS engines, should arrive in a day or so. Have you read any of them?

FFDP

iTrader: (2)

Swapping pistons and rods makes no difference here, no computer stuff to worry about. The GEN 4 rods are stronger than the GEN 3 rods from 99-04 anyway. People also want more money for LQ9 motors because they think they are special and finding a 04.5-07 block in some places isn't easy.

He should also gain compression with the GEN 4 pistons if they are flat tops.


Here is a question on cam choice. How much power do you want, what are your goals?

What kind of stall would you want to run? Like something in the 2500 range or 3,000+ stall?

Do you want the camshaft to be good on the streets or do you want that chop chop with hard to control idle?

You kinda want to think about the cam and stall choice together, at least I would. Figure a decent cam in the 22X/22X range with a 3,000 stall would make great power.

RPMSpeed Tech

You wanna keep your torque and have a decent low end/mid range cam use the TSP Truck Stg2 High lift.

You want a slight larger cam use the TSP Stg 3 high lift.

But i would stop there. Youll lose more than you will gain for a heavy truck above that. Youll be happy with either one.

Id get a 2400 stall from jakes for either of those.

willhorne22

Thank you for the suggestions. I actually lucked out and found a comp cam on craigslist today. Its this cam,

Brand:COMP Cams
Manufacturer's Part Number:54-416-11
Basic Operating RPM Range: 1,600-6,600
Intake Duration at 050 inch Lift: 220
Exhaust Duration at 050 inch Lift: 224
Duration at 050 inch Lift: 220 int./224 exh.
Advertised Intake Duration: 273
Advertised Exhaust Duration: 277
Advertised Duration: 273 int./277 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.530 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.534 in.
Valve Lift with Factory Rocker Arm Ratio: 0.530 int./0.534 exh.
Lobe Separation (degrees): 112
Camshaft Gear Attachment: 3-bolt
Computer-Controlled Compatible: Yes
Grind Number: XR273HR
Valve Springs Required: Yes
Notes: Requires custom computer tuning.
Footnotes: 7 - Stock springs cannot be used.

200 dollars new, I bought it. Looks like it will fit the build just fine? Thanks for all the help.

willhorne22

I see a lot of people using Pac 1218 springs, Will that work just fine with 317 heads milled .30

wretched73

iTrader: (1)

Those springs are good to .600" lift so yes they will work

RPMSpeed Tech

If you milled .030 youll need 7.375 pushrods.

willhorne22

Thanks, A lot for the help

swathdiver

Will that camshaft require a higher stall torque converter? I would think so but what say y'all?