wretched73

iTrader: (1)

I just picked up an LQ4 that I plan to rebuild over the winter and install this spring. I'm looking on advice on what cam to run and if anyone knows of a machine shop who can clean and mill the heads for me

2003 LQ4
317 heads
stock bottom end

Going into 2005 Silverado 4x4 ECSB
Currently 4l60E- might go 4l80E by spring
Stock converter
3.73 gears w/33" tires

Motor supposedly had a small knock in the bottom end, I never heard it run so I'm not sure if it was a knock or lifter noise. Either way I'm going to rebuild the bottom end with new bearings and new rings but reusing the rotating assembly.

I'd also like to put a small cam, mill heads, new lifters/springs/push rods.

Any advice on a cam? Truck is a DD, will be used to tow and won't be raced. I'm not interested in doing a converter or gears at this time.

Edit- Also, at the same time, I'll be adding 1 7/8" long tubes to 3" catted y pipe with 3" exhaust out the back

turboal1

I would check with TSP for a cam and kit

wretched73

iTrader: (1)

Thanks, I contacted them. I'll report back on what they recommend

Drspencer

iTrader: (1)

Where you located? Or did you wanna ship the heads..

wretched73

iTrader: (1)

I'm in Central NJ. Not looking to ship the heads

madmann26

iTrader: (7)

Let's start with,

What are your goals?

The "knock" you hear might be piston slap.

wretched73

iTrader: (1)

My goals are very simple, more low and mid range power than the stock 6.0 would have. I don't have any numbers I want to meet. I just want a strong, reliable motor that will make it easier to tow and haul ****. I don't race it and I don't have any plans to do so.

I've recently moved so I will put considerably more highway miles than I did on the 5.3. The 5.3 has 193k miles of mostly backroads doing no more than 50mph. Now I'll end up doing more of an even split of highway 75-80mph and backroads (50 mph max).

The 33" tires will most likely stay for the foreseeable future but a gear change might happen in a year from now (probably 4.56s).

Thanks for your help and I hope that clears up what I'm looking to get out of the new motor.

You're right the knock could have been piston slap- I never heard it run so I can't say for sure. Are there any "tells" that might tell me it wasn't knock? Do the heads or valves show any particular wear from piston slap?

wretched73

iTrader: (1)

Ok, so far I'm debating these two cams. Any comments on how they should work for me? Read a few good things about each one, not sure if the 228R is going to be too aggressive for a stock stall

Texas Speed 228R 228/228 .600"/.600"
or
Texas Speed 224R 224/224 .600"/.600"

grey matter 04

iTrader: (9)

I ran the 224r in my old setup worked great .
6.0 bored.030 over with 243 heads and 224r cam made 396hp and 405 tq.
Was a good mild combo pulled a 22ft boat great.
Power came on early which I liked. I ran a 3200 stall with 390 gears