Jomar High flow oil filter , no by-pass valve

Some good info in this thread at YB (relatively work safe). Not only does he cut open the filters, he contacts the manufacturers for data. Many, but not all, provide specs. (Yes a Jomar is in there)
http://www.yellowbullet.com/forum/showthread.php?s=1ddbc7c13ba0ea7f00784fec4c69bcaf&t=420509

Great Info! Thanks

My moroso oil filter doesn't have a bypass neither and is one of the reasons I buy it. I was going to buy wix racing filters but their tech people are assholes and turned me away from them.

I read that whole yellowbullet thread last night, very interesting. I never thought of the bypass the way they describe it, makes sense.

Am I correct in assuming, if you use a non bypass filter, and it starts plugging up, your oil pressure as shown from the gauge port at the rear, will drop proportionally?

Filter is made by Baldwin--long said to be the best by McCandless
we like them--safe to use in any application--anytime
It filters oil all the time like you would suspect should happen but doesn't
If it is plugging up you are blowing up so....best thing is it does not add to the problem
Jomar and guys that run it are fantastic folks and know what they are talking about you can call them direct for fast shipping and a no BS experience Love those guys!!!!

500 years ago Bill Jenkins recommended the AC832 truck filter, the canister is as big as a garbage can so it's safe without a bypass.
Safe is a relative term. Straight 60 weight and 20 degree oil temperature will blow almost anything off the engine even with a bypass - it's just too much pressure.
It also depends in part on what the capacity of the pump's pressure relief system - some are pretty small.

So if the filter starts plugging up, will you see that as a decrease in idle oil pressure?

When oil pump speed come up with RPMs, would the oil pump bypass then allow normal pressure to oiling system?

Most oil pressure relieve valves/springs are set
at 70 psi so it will by pass at that point.. BUT
flow is what your after.. if the filter plugged up
100%you have ZERO flow
EDIT
The pressure gauge is after the filter

If the gauge is after the filter, a restricted filter would show up as lower gauge pressure?

This will be on a weekend warrior engine, oil will never get dirty, just thinking it through.

I think this is how it would work, just wanted to run it by the discerning minds of Moparts.

Geeezz! I have NEVER had a plugged filter in one of my Mopars street or race
If pressure is dropping you have a problem
Any filter will do and is not any problem
Never seen an engine failure due to a dang filter
Snap out of it!!!!

I have had a pressure drop of 20psi with a
Fram filter.. so did my brother and my buddy..
we dont use Fram filters anymore

I don't fully understand how the pump bypass would behave in a full or partial restriction, with a filter that doesn't have a bypass.

IF the filter starts plugging up the back
pressure increases which puts more pressure
on the pump... the pump by pass opens up BUT
if the filter were totally plugged up the pump
by pass CANT handle the total flow of the pump..
but if your smart the gauge outlet would show
zero pressure and if you put a low pressure
switch on that point to the ignition it will
kill the engine

Thanks for the explanation.

I always thought the pump bypass diverted back into the pan.

I am going to run the Jomars, ordered 3 from Jeg's.

I change the oil once a year, maybe go 2-3000 miles.

Oil pressure gauge should start to show a decrease with less flow.

Thanks again.

I haven't, but you have to remember you sacrifice particles filtered for flow, and a street car doesn't need to flow like a racecar. I run WIX 51515 on the street, and 51515R on the racecar. Your oil filter isn't going to be a bottleneck in a street motor.

I dont use the 51515R on anything... it has
less filtration the 51515 still has plenty of
flow fora race engine

Glad you said that, I'm actually thinking of switching back to the standard for racing. I still get 80psi at WOT with a 3/8 pickup and street filter, same as I did with a milodon external and race filter. Makes no difference I'd say as far as restrictions go.

i had a new fram filter collapse internally on a turbo 4 cylinder minivan with very few miles on it almost cost me that engine. oil light came on when my brother was driving, and he was smart to shut it down immediately. when it was back in the shop and a mechanical gage was installed, there was tons of oil pressure. lasted for about 10minutes run time then fell to almost zero. shut it off and restarted, normal pressure. pulled the filter off, and you could plainly see the insides were collapsed ! put the standard wix 51515 on, and that engine lasted a very long and healthy life. never again, as mr. p said, used fram filters.