BigD

iTrader: (31)

I am assembling an oil pump. I have searched high and low for this answer. Should I shim the relief spring for more oil pressure or not? I know some companies like ARE, MTI shim theirs, while Katech doesn't. One person posted he shimmed his .150", which to me seemed excessive. I would like to have "alittle" more oil pressure than stock. Has anyone here shimmed their spring? if so how much? and what was the end result for pressure? Does anyone have a pump from ARE or MTI and know what shim they use? Thanks, Darrin

BradWS6

iTrader: (3)

TTT

-Joseph-

iTrader: (12)

I've used 3 small washers for a total of .110" sometimes they come out to .100" depending on the thickness of the washers. You can buy a bag of small washers at Radio Shack for $1.50 or so. Seems to add around 15-20psi, but those were on stroker engine packages which ran about 50-60psi warm at idle. Bearing oil clearance comes into play on any engine, if you have a "loose" engine you may not gain much pressure as a fresh engine.

xssive

iTrader: (123)

Can this be done with the pump still physically mounted on the motor? I am guessing it would be hard to deal with the spring....

-Joseph-

iTrader: (12)

I think it would be a PITA with it mounted, it takes a little work to remove it if your that far though. You can wrench the pickup tube bolt loose for 20 minutes, or loosen the pan to get to it easier.

Nasty N8

iTrader: (33)

We shim oil pumps for the added pressure, and also debur and polish the vaines.

Nate

BigD

iTrader: (31)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Nasty N8:
<strong> We shim oil pumps for the added pressure, and also debur and polish the vaines.

Nate </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">What size shim do you use? Thanks!

Darrin

<small>[ February 06, 2003, 08:01 AM: Message edited by: BigD ]</small>

BigD

iTrader: (31)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Nasty N8:
<strong> We use right around .100

Nate </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thank you

Nasty N8

iTrader: (33)

We use right around .100

Nate

Ford_Assassin

iTrader: (4)

Digging up an old thread, but where exactly is the spring located on the pump? Is it under the allen plug?

Thanks!!

LS1MCSS

iTrader: (18)

Yes it is.