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Old 11-08-2021, 09:12 PM   #15
Risingson05
 
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Quote:
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I did. 7.700 and 7.675 I think.
A couple were a smidge off from where they are supposed to be but so far so good.

Nice ! Yeah they give you +or - 5thou . Did you order them through manton? Thanks for your input sir
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Old 11-09-2021, 02:17 AM   #16
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Off the shelf lengths from BTR.
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Old 11-10-2021, 12:26 AM   #17
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I got the GM performance lifters but haven’t installed the cam yet as that is getting installed in the spring. Kind of hoping these will be fine as I got the gpi ss2 cam. The installer recommends Johnson but don’t currently have the money for those lifters and don’t plan on going over 6700rpm either.
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Old 11-10-2021, 08:08 AM   #18
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We run a ton of ls7 lifters on builds, most street cars. Good luck with them.
spin to 7400rpm on some. Boosted to 1000rwhp.
Use various race lifters for other cars mostly doing road race or drag.
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Old 11-17-2021, 06:26 PM   #19
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I only got 27K miles on LS7 lifters. Shifts at 6800. Only 16 runs down the quarter. At least one of them is going out. Only a 480rwhp car. Amsoil, changed every 3K miles.

Very disappointed in the LS7 lifters. Johnsons on order.
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Old 11-18-2021, 02:15 PM   #20
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Johnson LSR 2116's
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Old 05-13-2022, 11:23 PM   #21
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Does anyone know what the preload should be on the gm performance racing lifters (88958689)? I've read .050 - .100 and some say .030 - .035
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Old 05-14-2022, 01:55 AM   #22
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Quote:
Originally Posted by morepowerjoe View Post
Does anyone know what the preload should be on the gm performance racing lifters (88958689)? I've read .050 - .100 and some say .030 - .035
Lifter preload can be used to make a safety margin to account for cams with small PTV clearance. Thats usually where you see people recommending small amounts of preload. Essentially, in a bad situation, the lifter can only pump up a small amount and keeps the valve and piston from making contact.
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Old 05-14-2022, 02:04 PM   #23
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I would go solid lifters with low lash cam if you can afford the new rockers
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Old 05-17-2022, 02:33 AM   #24
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Morel solid roller
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Old 05-17-2022, 07:46 AM   #25
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But I really need to know the lift preload for these gm performance lifters. Got me a comp cams adjustable pushrod checker and 12" electric caliper
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Old 05-24-2022, 01:09 PM   #26
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So I think I have a collapsed lifter. I have another lifter tick and this time it's pretty bad and I'm currently using the gm performance racing lifters. I could definitely tell it was on the passenger side so I digged into it with a pushrod checker. I found one lifter that wasn't pumped up and the lifter looked like this one. The one one the left was pumped up the one on the eight wasn't. Do you guys think that this is my culprit?

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Old 05-24-2022, 01:25 PM   #27
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LS7 lifters with BTR stage 2 cam, been going on plus 3 years no issues.
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Old 05-24-2022, 03:55 PM   #28
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Johnson 2116LSR are ok with my new engine so far. We’ll see how they do once I get back on track (which I suspect they’ll be fine).

I don’t have anything to offer with your more recent question, though. I’ve been so used to ticking from under hood that I don’t even worry about it anymore. Between lifters, rockers, headers, gremlins, trolls… there’s so much noise that I just keep sending it.
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