How much spring load will the LS7 lifters take?

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Aug 31, 2010 | 10:21 PM

ZeroTraction

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From: meridian, ID

How much spring load will the LS7 lifters take?

So i just got some new AFR 1040s that were ordered with the AFR-8002 springs and i have been told they might be to much for a hydraulic lifter unless i spend a grip and get something like Morel lifters. I dont really want to pull the springs and get others since everythin is setup and brand new now. These will be goin on a built 356 with a 224-230 .57s lift cam. The motor now has a smaller comp cam with im guessing comp cams lifters....anyone know if the lifters i have will work fine? If not what should i do...i have been told i maybe could run the LS7 lifters?

spring specs. #8002
http://www.airflowresearch.com/valve_spec.php

Sep 1, 2010 | 05:45 AM

69LT1Bird

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From: Lapeer, MI

First question is why do you think you need so much spring pressure.

Also, your link does not work.

Sep 1, 2010 | 11:07 AM

ZeroTraction

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From: meridian, ID

Link works fine for me...

http://www.airflowresearch.com/valve_spec.php

I bought the heads off a member on another forum and they were opdered with the better springs vs the 8017s they come with. I got them for a killer deal and i could nto pass them up. I have had people tell me i can run LS7 lifters and call t good and now have had people tell me it might to to much pressure for a cast cam

Sep 1, 2010 | 02:33 PM

AES Racing

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From: Elk Grove Village IL

provided you're running them at 1.950-1.970 installed height, don't see a issue.

Sep 1, 2010 | 02:57 PM

Sales2@Texas-speed

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From: Texas!

Did they cut that pocket for that larger diameter and make the cut extra deep to get that extra installed height, or are they running a long valve? I agree, as long as you have them at that taller height, they look fine.

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Sep 4, 2010 | 11:01 AM

rem308winvtr

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From: ny

Only run as much spring preasure as needed because you will be just losing hp to unneeded preasure

Sep 4, 2010 | 04:39 PM

ZeroTraction

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From: meridian, ID

Maybe i could get them re shimmed to lower the pressure some. I have been told that the the way they are now i could break my cast cam with that kind of pressure....?