dounome Posted January 20, 2007 Report Share Posted January 20, 2007 I got my 408 put back together and while it is much better as far as valve train noise with the new LS7 lifters.............its still loud. The whole motor just makes more noise then I would think. So my question is, compared to stock 6.0 how much valve train and just engine noise period should this thing be making. I have patriot stg 2 heads with the dual springs, bigger push rods, stock rockers, new LS7 lifters. I went over everything and it is all done perfect. BTW with new lifters does it take some time for them to pump up and quit down? WHen I first started it things did not sound good at all, but after about 3-4 minutes it calmed down. Quote Link to comment Share on other sites More sharing options...
RevolutionRaceWorks Posted January 20, 2007 Report Share Posted January 20, 2007 Some of the clatter might just be the tone diffrence in a forged engine from a stock one.. and depending on your build tolerances.. I know with turbo or boosted engines we tend to build them a wee bit looser so they kina have a little clatter to them but nothing that will be bothersome. Everything is good with pushrod length and valve lash? That would be the only other suspects I would suggest. Quote Link to comment Share on other sites More sharing options...
04CHASE Posted January 20, 2007 Report Share Posted January 20, 2007 did you have any celarance issues with the ls7 lifters or did they just drop in and go? Quote Link to comment Share on other sites More sharing options...
dounome Posted January 20, 2007 Author Report Share Posted January 20, 2007 I did not check the PR length or valve lash only because the motor was running fine prior to me tearing it down. I have just never heard it run until now. I did buy it from a guy who had it built by Gomer and that man knows how to build LS engines. Just curious about all the noise. Quote Link to comment Share on other sites More sharing options...
dounome Posted January 20, 2007 Author Report Share Posted January 20, 2007 did you have any celarance issues with the ls7 lifters or did they just drop in and go? Drop in, but you want to run the caddy seriers lifter, I will end up buying those soon. Quote Link to comment Share on other sites More sharing options...
Quik Posted January 20, 2007 Report Share Posted January 20, 2007 you should of soaked the lifters in oil then pumped them full of oil before dropping them in. i had no issues with teh ls7s i ran Quote Link to comment Share on other sites More sharing options...
dounome Posted January 20, 2007 Author Report Share Posted January 20, 2007 I should have done that I agree, but none the less it has calmed down a bunch. Quote Link to comment Share on other sites More sharing options...
dounome Posted January 21, 2007 Author Report Share Posted January 21, 2007 kinda tuff to hear the valve train, its really lean at idle right now and its 22 degrees out. idle Quote Link to comment Share on other sites More sharing options...
Black2003SS Posted January 22, 2007 Report Share Posted January 22, 2007 Sounds awesome. Sounds like a normal cam'd stroker to me. I thought for a second there I heard a couple of little "pops" or backfire when you were by the rear tire? Could just be microphone distortion. How much power do you think you are putting out? Quote Link to comment Share on other sites More sharing options...
goldie castaneda Posted February 22, 2007 Report Share Posted February 22, 2007 go a 414 stroked and it scared the crap out of me to. Builder said thats how she will be. we built it loose to handle nos. Just gonna get use to it. good luck Quote Link to comment Share on other sites More sharing options...
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