Slowverado

i started the day planning to do the cam swap after work around 3P.M. well, sometimes plans change, as they did today. i called a friend of mine that is LS1 crazy also and was talking to him and he told me he had some slp 1.85 ratio rockers that he'd trade me for my stockers and 50 bucks so i said cool. well i went home and was gonna do those and the cam but ended up not having the pen magnets and the autozone was closed so i just swapped the rockers out and put in the comp hardened 7.4" pushrods and buttened things up and changed the plugs and finished it all. Well, usually when i fire it up it instantly starts clicking with that nice valve train noise we all know and love. well this time i fired it and it was silent(other than the blissful sound of the bullets) no clicking or knocking. i revved it and let it sit for about 10 minutes. it kinda seems like the exhaust note is different now...should it be with just the 1.85 rockers? but i wish i had went ahead and put in the cam aswell but ohwell, i don't have work or school till tuesday at 3pm so i still have time. anyone have some new head bolts for sale?

Matt

BigTex

iTrader: (16)

Watch out. The tapping is probably coil bind on the stock valve springs. Running 1.85 rockers will make a .500 lift cam act like a .545 lift cam. Either take off the rockers or upgrade springs.

Slowverado

i'm saying that the tapping is gone. i don't have stock springs either. i was saying that just doing these two things and properly torquing the bolts down got rid of the the tapping.'

Matt

POPE

BigTex, so what you are saying is that the rockers he put on (slp 1.85's) accually are telling the motor that the cam is bigger when it really isnt? So would ths hurt or help an internally stock motor, or would you have to change the springs push rods, and so on?


Hey matt, still no sign of ayhting here <img border="0" alt="[bang head]" title="" src="graemlins/gr_banghead.gif" /> . I'm kinda pissed <img border="0" alt="[shoot]" title="" src="graemlins/gr_guns.gif" /> . Is there anything you can do? I could have used that money for alot of other stuff <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> . Please tell me some good news.
<img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

Patrick G

iTrader: (14)

If any of your old pushrods were bent or warped, you would have gotten clicking. I expect the new Comp pushrods are what are making the engine run quieter now. The rockers with their higher ratio, will be accelerating the valves faster which SHOULD make them louder as they hit the seats, not quieter. I would look at the pushrods as your cure.

BigTex

iTrader: (16)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by POPE:
<strong> BigTex, so what you are saying is that the rockers he put on (slp 1.85's) accually are telling the motor that the cam is bigger when it really isnt? So would ths hurt or help an internally stock motor, or would you have to change the springs push rods, and so on?
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The camshaft's lobes are multiplied by the rocker arms ratio. Stock ratio is 1.7 and he just installed some 1.85 rockers. Thats very similar to installing a cam with more lift. Basically, the valves will be opened more with the 1.85s than the 1.7s. That is why you need aftermarket valvesprings.

Slowverado

actually POPE, they should be there by now. we sent them out wednesday. i have the usps number i'll get on their website and see what's up. if they aren't there by next wednesday i'll send you a refund.

Matt

POPE

Thas cool mabey they'll be in monday. I hated to have kept bugging you about it, but I guess thats how it goes. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

BigTex, would the LS6 springs work good for those rockers? This may be a stupid question, but will the valves be opening quicker or staying open longer? If they stay open longer wouldnt that affect fuel milage, and would you need to adjust the prssure?
One more question what intake manifold will work with the 6.0 heads? I'm thinking about doing a cam 6.0 heads, and edit. So first I need to know what all i'll need to do it. Thanks for the help.

BigTex

iTrader: (16)

With the larger rocker ratio, the rockers will open and close faster, which should make more noise. Duration, which is how long the valves are open, stays the same.

The same truck intake will work on any GEN III head. 6L heads would not be good unless you are supercharged. If you are naturally aspirated, you will want the smallest chamber possible to get compression up. Stock 5.3 heads have a 61cc chamber while the 6L head is 71cc. An untouched 6L head on a 5.3 shortblock would give you an 8.5:1 compression ratio.