View Full Version : what preload on morell tiebar lifters ?


red 454
07-14-2012, 03:40 AM
what preload is required on morrell street hyd tie bar lifters ?
are they a direct replacement for the LS7 lifters after you remove the LS buckets ?
will the existing 7.450 push rods be OK ?

Tainted
07-14-2012, 07:39 AM
Should be anywhere from .60-.85. You should always measure for pushrod length. If you have an aftermarket cam or shaved heads you def need to check.

FlamingTA
07-14-2012, 11:11 AM
I could be wrong but I thought the Morel's take less preload, around .030-.050.

85MikeTPI
07-14-2012, 05:14 PM
what preload is required on morrell street hyd tie bar lifters ?
are they a direct replacement for the LS7 lifters after you remove the LS buckets ?
will the existing 7.450 push rods be OK ?

http://www.eecis.udel.edu/~davis/z28/2012/120218-L92shortblock/content/102_1152_large.html

Is the instruction sheet I received with my lunati version of the morel street link bar lifters.. You should always measure your own pushrod length, but fwiw, my setup with the link bars needed a 7.350 length.

red 454
07-14-2012, 06:59 PM
yes i was going to mesure the push rods but i was just woundering about the lifter length and preload ? so is 30 or 50 thow ?

i am using the stock rockers with a trunion up grade so no adjustment .
on mast 11deg ls3 heads
IM now waiting FOR THE MAST ROCKERS STANDS THAT DIDENT COME WITH HEADS ?
(pissed off ) as it says in the mast catalog LS3 rocker gear fits the mast heads(thats bull shit the rocker bolt holes are WAY out


they sent me 8.100 length push rods i havent been able to try them yet as i have no rocker stands what do you think of this length is IT close or way of ?

crainholio
07-14-2012, 07:27 PM
so is 30 or 50 thow ?


The sheet linked above says preload target is 0.045 - 0.050 for aluminum block and heads.

red 454
07-14-2012, 07:57 PM
thanks

this is interresting about morell ,lunatie, crow, etc made by
http://johncalliesinc.com/dealers.php

litle88
07-14-2012, 08:06 PM
.50 to .80 is what your looking for then check for your correct pushrod length.

hymey
07-16-2012, 03:14 AM
I run them at 20 - 40 never any more then 60.. on all customers cars have had negative results with more preload.

red 454
07-27-2012, 01:40 AM
I run them at 20 - 40 never any more then 60.. on all customers cars have had negative results with more preload.

CAN YOU elabarate on negative
please

Gray86hatch
07-27-2012, 09:04 AM
I run mine with 5/8 turn from zero lash. They are quite and revs 7500 no problem

Tim

KRAZY K 2000 TA
07-27-2012, 03:29 PM
i have mine at .065 and that is what Kurt Urban advised me to run them at.I trust him.

WKMCD
07-27-2012, 08:37 PM
The cup in the Morels sits about .050 higher than stockers. Your PR's will be too long. Measure and get the right length.