VeiledLt Posted August 17, 2009 Share Posted August 17, 2009 Hey guys first post here, never had to before because I've always found everything in needed via searching but I finally have found something I could not find and thought maybe someone could help or lend their insight. I'm currently building a l28 up since the one in my Z decided to seize the oil pump. Anyways, so I'm building the new motor and its going along smoothly other then today I measured the free length on the stock spring and found it was not too spec, not overly surprising, however I put in over-sized flat top pistons, did a port and polish, 5 angle valve job, took .004" off of the head and balanced the rotating assembly. I have another set of l28 springs that I believe may be the proper free length, (according to the FSM spec is 1.968 in. Outer and 1.766 in. Inner and mine measured about 1.94 for outer) but I was concerned maybe with the work I have done I should look into heavier pressure valve springs? But I cant seem to find spec for after market springs and the only ones I can find are the ones on 'TheZStore.com' but they say for aftermarket cams only, however I thought maybe with the work done and higher reving capability of my new motor I should look into them? So if someone could direct me in the way of which springs to look into (Z-oriented or other) or if the stocker springs would do just fine with a new set I would be much abilged. Thank you very much in advance to anyone who answers I appreciate it!! -Spencer Quote Link to comment Share on other sites More sharing options...
Xnke Posted August 17, 2009 Share Posted August 17, 2009 You might as well drop in a cam, while you are in there It's addictive, isn't it! Schneider has a bad rep on cams for the L6, but the springs they make, set #60822, work well. Reasonably priced, too, but really, they are the only springs I can find for the L6 that I haven't had to call for pricing on... Quote Link to comment Share on other sites More sharing options...
ozconnection Posted August 17, 2009 Share Posted August 17, 2009 If you have the opportunity to put in some new valve springs...now is the time to do it. It only takes one weak or below spec spring to ruin your day with valve float and the potential disaster that can occur shortly thereafter. If you are even considering putting in an aftermarket cam, then put in aftermarket springs. Stock springs are OK for a stock cam..... just, but old ones put into a fresh head is foolish IMO. Not only that, a lot of aftermarket camshafts have valve lifts that are very close to or in excess of what lift the stock springs can handle. Cheers. Quote Link to comment Share on other sites More sharing options...
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