Cam Swap and Opinion

[Tonyrodz]

I've been getting the code for random misfire for about 2 yrs now .
Usually happens on the highway, speeding and driving normally, doesn't matter , truck has never skipped a beat. Has ran great except for that code. My friend finally scanned it for me . It was live data. Misfire code was from the maf, I have a drop in k+n, so he said might be because of that(oiled filter) but never got a code for that. Random misfire was showing on cyls 2, 4, 6, 8, and I think 1 and 5. Showing high count misfires, forgot what cylinders tho. He said cat might also be bad on that bank(no codes ).He wants to do a leak down on it also. Truck still runs great. I've been pricing out 6.0's , which are expensive. I found a 4.8 with 115,000 on it for $500, just the long block and intake. Been thinking about that and getting a cam installed. I heard cams aren't bad to do in the LS motors, and the motor will be out of the truck .Think this would be the way to go? Since I can't afford a 6.0. Does the 4.8 have potential? I don't really want to mess with the motor that I have, just in case, as it has almost 275,000 on it already. Sorry if I'm a bit confusing, my mind and thoughts are all over the place right now. Thx for any input.

 

[Sasquatch]

I have heard good things about the vinci trucker cam. Scroll down a bit to find it here, http://www.vincihiperformance.com/camshaft spec list page ls truck.html

A few guys are running on here and liked it, http://www.tahoeyukonforum.com/threads/want-a-cam-with-a-good-amount-of-torque.50081/

I have never owned a 4.8 but junkyards are full of 5.3`s. I would keep looking for a good one of them rather than go with a smaller engine.

 

[Tonyrodz]

I'm not looking to go too crazy, just something a little better, since I can't afford it. I see one or two cam choices that I like. Thx for the info and links. Is there any info on the heads that come on our motors? I know some are better then others .

 

[Sasquatch]

I know that heads made by castech are known to crack, Their logo is somewhere under the rocker arms. If i remember correctly there are 706 and 862 heads with the 862 being the best choice. I`m going off memory so if i`m wrong hopefully someone here corrects me.

 

[Tonyrodz]

Know anything about 317 heads? I saw an an on cl for them.

 

[Sasquatch]

I had no idea but i found this, Looks like that is the ones to go with.

317
Head: 2001+ LQ4 6.0-liter Truck
Material:Aluminum
Part Number: 12562317

Combustion chamber Volume:71.06cc
Compression Ratio:9.4:1
Intake port Volume:210cc
Exhaust Port Volume:75cc
Intake valve Diameter:2.00-inches
Exhaust valve Diameter:1.55-inches

What you need to know: The LQ4 head received aluminum heads starting in models year 2001. All other features are the same as previous years iron heads. This is the workhorse head for street / strip turbo and blower cars.

Source, http://www.performancetrucks.net/fo...ce-21/difference-between-all-ls-heads-442909/

 

[Tonyrodz]

Thx for the info .I found somewhere on line saying the 317 heads we're crappy. Better heads we're , I think, 799 and 249's , which we're actually the same heads , except the 799's we're sand cast . I actually have a lead on a complete 05 6.0, harness and computer for $850. Supposedly only has 111,000 on it.

 

[Rocket Man]

Man I hope you get that 6.0! That would be sweet. I've been thinking about getting one and building it ( including a blower) in my spare time so someday I could just swap it out.

 

[Tonyrodz]

Hope I can get it too! Think everything will bolt right up with no problems? There's a 4.8 in there now.

 

[Rocket Man]

There's threads on it. I believe you will need a tune afterwards. That's about all I know.