skyhighsami

iTrader: (8)

Get a cam specd by someone. It will meet your needs perfectly

sonoma43

iTrader: (1)

go down to a .04 head gasket...I think that should do it. I believe stocker's are .06 IIRC

dug

iTrader: (10)

If youre gonna raise the compression, I vote for a tr224 112 cam. I think the tradeoffs are worth the hp. It should make 400rwhp.

sonoma43

iTrader: (1)

he doesnt want anything near that big for down low torque...

ap2002

iTrader: (8)

my mods were, 5.3, 212/218 hi-lift 114lsa, LS6springs, no cats, big case magnaflow, electric fans, k&n filter, and 93oct Wheatley tune... i was still on the stock converter and i didnt loose NO bottom end, i really believe the power range on that cam came in real soon anywhere from 1500-2000rpm..

I dont know about the PAC springs, but if they are like the 918's they will have valvetrain noise, the LS6 are stock quite...

dug

iTrader: (10)

then he should run a tr220 cam.

For best drivability, just build a ls2 clone with 204 ls6 cam. They dyno 360rwhp through stock exhaust manifolds.

Chris05

I run the xr265 high lift. In a 4.8 though but I lost no bottom end power and it pulls hard from idle to redline at 6200 rpms. you can barely tell its cammed though nice smooth idle it should go well with a 6.0L. If your going to pull the heads to change the head gaskets lol you might as well resurface the heads instead for about 100.00.

1998chevy1500

In the end that is what I will be doing, but I would like to gain what knowledge I can before then. You know, be the informed consumer. I don't want to put blind faith into someone to pick the parts I need.

If the stock is 0.06", and running a quick numbers check on a CR calculator, I should be able to run a 0.04" head gasket with a minor amount of milling to the head to get the same CR as I was shooting for with the 243 heads. Good to know, now to ask around to see if there are any good machine shops in the area. Any guesses on how much I should be milling off? Once again, what are some companies I should be looking at for getting the thinner head gaskets from?

Thanks, no problems with the LS6 springs? I don't have a problem with the extra cost of the PAC for the piece of mind, but I'm not looking forward to increased valvetrain noise. How much louder are we talking? What kind of noise?

Based on where it started making power for you in a 5.3 it should be just about perfect for what I am looking for in a 6.0L

Well, I was planing on just putting 243 heads on with new stock head gaskets. But, being I can probably get the CR I want with a thinner gasket and a quick milling of the heads I will be going that route. Should be a lil cheaper in the end too.

Thanks to everyone, you have all been a huge help.

Mark Johnson

iTrader: (1)

To throw a wrench into all this, isn't it the lobe of the cam that makes the noise as pwer stressing everything else and not so much the springs...........

1998chevy1500

Didn't your mama ever tell you that throwing wrenches is dangerous. You could poke an eye out. But on a serious note, I don't know, some of the threads I have read suggest that the stiffer aftermarket springs like the Comp 918 and PAC 1518 make more noise than the LS6 springs. Other threads say it is due to other factors like pushrod length, lifter preload, and ramp rate.

I wish I could find the thread, but I saw a post by zippy stating that he had taken a cammed up truck w/ 918s in it which had valvetrain noise and swapped the cam out for the stocker and the valvetrain noise remained, he said that the noise was most likely due to the 918s.

If I knew what the amount of noise increase we were talking about was, or if the PAC 1518s make the same amount of noise as the 918s it would help me to make my decisions.