Are these LS7 lifters? Dissected

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Aug 20, 2020 | 08:12 PM

BigBlackCamaro

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Are these LS7 lifters? Dissected

I'm doing a basic rebuild on an LS2 6.0. Just rings, bearings, pistons, summit 8706 cam, etc.

I have these lifters I bought that were advertised as LS7 lifters. They're clearly not.

Original LS7 lifter roller to cup: is .393, fully compressed is .192
New "LS7" lifters are .374 roller to cup, .207 fully compressed.
I was told that the internal valving is LS7 spec.
I'm thinking I could have gone down to the corner store and got some sealed power lifters. But these are supposed to be LS7 spec.

THOUGHTS? And does it even matter? I'll be using valve springs with a 140 pound seat and 380 pound open pressure. Think these will be ok?

Lifter in question:

Real LS7 lifter:

Aug 20, 2020 | 08:16 PM

Che70velle

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Those lifters will work just fine with the springs you’ve listed. No worries.

Aug 20, 2020 | 08:23 PM

BigBlackCamaro

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Quote:

Originally Posted by Che70velle

Those lifters will work just fine with the springs you’ve listed. No worries.

Thanks, that's good to hear. I just got in from the garage, I did put them in. Been working on this thing a few hours at a time and really thinking too hard maybe.
I miss the days when a lifter was a lifter and if one failed you could just pull the intake to see them.

I'll be getting the heads back tomorrow and bolting those on probably this weekend.

Thanks for the reassurance.

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