"OEM LS2 Lifters" vs "LS7 High Performance Lifters"
#1
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As far as I can tell the part number for the OEM 2005 LS2 lifters is: 17122490, but virtually no one sells them.
Instead it appears that the GM LS7 high performance lifters (12499225) are the suggested replacement part. I've seen some sites suggest that it's an improved design and these are a fully compatible replacement part.
I've actually put these lifters side by side and noticed that the depth of the pushrod seat is less on the LS7 lifters. This implies to me that you would want a shorter pushrod, but I've never seen anyone state that there is any such requirement. Can anyone who has actually done this swap confirm that they can replace the OEM with no change in setup?
Instead it appears that the GM LS7 high performance lifters (12499225) are the suggested replacement part. I've seen some sites suggest that it's an improved design and these are a fully compatible replacement part.
I've actually put these lifters side by side and noticed that the depth of the pushrod seat is less on the LS7 lifters. This implies to me that you would want a shorter pushrod, but I've never seen anyone state that there is any such requirement. Can anyone who has actually done this swap confirm that they can replace the OEM with no change in setup?
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Exactly. I agree with the LS7 not being a high performance lifter. If you plan on running an agressive lobe like a Comp Cam XER then get a set of good lifters like Morels, Lunati, and even Comps. My brand new LS7 lifter lost the roller wheel and it went through my motor. Fun Times.
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#9
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How aggressive is "aggressive" exactly? I just ordered a smallish LSr cam (the 273 http://www.summitracing.com/parts/CCA-54-457-11/). Think an LS7 lifter would be sufficient or should I upgrade?
That, is going to be seriously hard on your valve-train.
Deal with certainties and avoid possible trouble.
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How aggressive is "aggressive" exactly? I just ordered a smallish LSr cam (the 273 http://www.summitracing.com/parts/CCA-54-457-11/). Think an LS7 lifter would be sufficient or should I upgrade?
As for this quote, WTF is that about, at least add some useful input.
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If there's any doubt, ....there's no doubt.
That, is going to be seriously hard on your valve-train.
Deal with certainties and avoid possible trouble.
That, is going to be seriously hard on your valve-train.
Deal with certainties and avoid possible trouble.
#11
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That, is going to be seriously hard on your valve-train.
Deal with certainties and avoid possible trouble."
It's my opinion,
Last I heard this was a public forum.
It's in plain english; if you have a problem with it or can't understand the meaning, just try and be mannerly and ignore it.
Last edited by Sid447; 01-30-2010 at 09:33 AM.
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