What lifter would be the best choice?
What lifter would be the best choice? Like the title says. I am looking at changing out the LS7 lifters that I currently have since I'm swapping cams again. I was looking at the BTR SLR lifters, Comp 850 lifters, Morel 5290 lifters, Lunati 72332. I know there are better lifters out there but I think any of these would be a step up from the OEM lifters. I will be running the cam and springs in my sig with these. I will be shifting around 6700-6800rpm. Any help/advice would be much appreciated.
Last edited by poltergeist 02; Nov 16, 2013 at 07:11 PM.
I'd step up to the Morels. It's worth it to at least get the link bar.
If you really wanted to increase performance, go with a short-travel. Morel, Comp, and Johnson all make them. They act like a solid roller at higher RPMs reducing loft and bleed off issues. You just have to be very careful with preload. For example, my Johnson short-travel lifters only have .058" of total travel vs the LS7 having something like .200" of travel. So you have a much narrower preload window to work with and must size the pushrods precisely.
If you really wanted to increase performance, go with a short-travel. Morel, Comp, and Johnson all make them. They act like a solid roller at higher RPMs reducing loft and bleed off issues. You just have to be very careful with preload. For example, my Johnson short-travel lifters only have .058" of total travel vs the LS7 having something like .200" of travel. So you have a much narrower preload window to work with and must size the pushrods precisely.
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In my experience...if you have springs rated above .625", don't F around and go straight for the street Morel's. I've had the CTS-V, LS7, BTR, and Morel's...only the Morel's have been silent, all on the same setup.
I would really recommend stepping up to a HV/HP oil pump as well...most have the Melling, I used the LS4/LSA ($80 from the dealer). There seems to be a connection to silent valvetrain and HV/HP oil pumps (in my mind) from all the threads I have seen over the various years. I've noticed the only people that had good luck using LS7's with more aggressive builds have always had the HV/HP pumps. I installed the Morel's at the same time as the LS4 pump, so I cannot say. My oil pressure went from 47 PSI hot at idle to 61, so it wasn't bad to start with.
I would really recommend stepping up to a HV/HP oil pump as well...most have the Melling, I used the LS4/LSA ($80 from the dealer). There seems to be a connection to silent valvetrain and HV/HP oil pumps (in my mind) from all the threads I have seen over the various years. I've noticed the only people that had good luck using LS7's with more aggressive builds have always had the HV/HP pumps. I installed the Morel's at the same time as the LS4 pump, so I cannot say. My oil pressure went from 47 PSI hot at idle to 61, so it wasn't bad to start with.
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Weight on the cam side of the valvetrain (pushrods, lifters) is not detrimental. Weight on the valve side is. Weight on the cam side produces a more robust valvetrain. Therefore, go with the best lifters you can afford and biggest pushrods you can fit.
The SLR lifters bleed down slower at idle. To combat high spring pressure at higher RPM, you need a short-travel, because it acts like a solid lifter. At least that's my understanding.
Puts wish list parts in sig. I have had first hand experience with the LS7 and now have the SLR's in my car. The LS7's will tick at idle with the BTR spring kit you are going to run, mine did. The tick gets louder as the engine gets hot. I pulled my brand new engine back down and installed the SLR lifters. Idle tick is gone. Also with the SLR lifters you only want to run about .040 preload. Just in case you miss a shift and a valve hangs open too long, since these lifters bleed down slow, there could be an issue there. You may talk to Brian more about this.
My car hits the 7000 rev limit in 1st and 2nd gear really fast, if I am playing and blowing the tires off. Never had a problem. I need a shift light...LOL
My car hits the 7000 rev limit in 1st and 2nd gear really fast, if I am playing and blowing the tires off. Never had a problem. I need a shift light...LOL
would the morel 5290 kit be better then the btr lifters? I know they say 6500rpm is the max for the morels, but I think they are talking about high rpm for an extended period of time like road racing.
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You sure you got Tick stg 3 cam & it's also not a wish list, asking as lift listed in your sig is not quite correct