Hey guys, most you that know me from LS1.com know I have an LS6 cam that I have yet to install. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

I was reading somewhere that the 2002 LS6 requires longer pushrods. I'm fairly certain that I have the earlier cam before the ZO6 went to 405hp. Just curious if anybody had any problems with the pushrods when they installed thier LS6 cam. Thanks for any help.

 

Dont worry about the pushrods. You have an 01 LS6 cam. The 02 went to a 19mm base circle on the cam. That change needed to be compensated by either longer pushrods or longer valves. GM opted for valves.

Your 01 cam does have a slightly smaller base circle than a stock cam (19.3mm vs 19.7mm, I think). No need to mess with pushrods. It will allow you to mill your heads a little more without going to shorter pushrods.

Get that cam installed.

 

Should I have the heads milled right away or can I just install the cam and everything will be fine?

I'm looking at getting that cam installed early this spring.

 

From what i have read , you can install an 02 Ls6 cam and still use the stock push rods.

 

Having the heads milled will increase compression. If you weren't planning on pulling off your heads, don't mess with it. But, if you do in the future, you have some room to work with.

On the 02 cam - Yes it will work with stock pushrods. I guess GM wanted to maintain the proper geometry and lifter preload.

Its late, so the following may be completely incorrect, but I dont think so:

It seems to me that if you ran the 02 with stock pushrods, you would be decreasing your actual lift some since the pushrod is a little short. I calculate out .503 lift given that the base circle is .7mm shorter than stock. Lobe lift should be 8.217mm minus the .7 gives 7.517 to the rocker ratio of 1.7 for 12.779mm valve lift which is .503". If I'm correct, this also puts you squarely in between pushrod sizes of stock 7.4" and longer comp 7.45" pushrods. ** If you milled your 5.3 heads .035, you'd gain back to almost .540 lift on an 02 cam and get your CR to just a tad over 10:1. <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> I need a drink.

 

I've heard that on the 99 5.3L that I will most likely not loss any low end rather it will stay the same or increase very slightly. The 99's had a weaker cam in them than the 2000+'s.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by MyLS1Hauls:
<strong> Just a side note, i'd be willing to bet that there's a loss in low rpm torque with an LS6 cam, since the cam is retarded by about 2 deg and it has a very wide LSA. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">i aparenty have alot to learn about cams, can you explain how a wide LSA kills low end? i thought that that was good for low end. i am thinking about this cam too but not if i am going to loose alot of low end. is there any cam that has virtualy has no loss of power anywhere but still gains some up top.

seems to me the factory has alot of things to worry about, noise, valve train life, emisions, idle, miliage. i dont care about any of that stuff but i dont want to get a cam that is going to drop me a noticable amount of power someware. maybe i will just keep what ever is in there <img border="0" alt="[bang head]" title="" src="graemlins/gr_banghead.gif" />

 

Parish8- You fit into a special category since you have a supercharger. A wider LSA is desirable with FI and nitrous. Do a search in the FI section on cam choices. Most guys go with a 114+ LSA for boost.

 

parish8, why don't you just buy my 01 LS6 cam, i've heard from tons of people that it's great for n2o and forced intuction, give it a whirl.

Matt

 

Now I'm beginning to wonder...am I going to lose low end with the cam or not? Maybe I need to go with a different one?