There are a lot of smart experienced people on this site and I would like to know the thoughts on bypass vs non bypass oil filters. Do you run one over another. Do you have a specific reasons?
I have chosen one over the other and had a very interesting conversation with a very reputable manufacturer that brands their own filter albeit I was only aware recently that they did but they make other quality products so I called to discuss. They only sell the non bypass and we had a good discussion.

Interested to hear points of view.

Dirty oil is better than no oil!

Why do you believe you would ever have no oil? You hit the nail on the head for the reason I have heard most. I'm truly asking and not being a smart ass.

Either way is fine, I'm sure you're gonna have a quality filter on it, like a System One.

Flip a coin, it's not a big deal

Do I run a bypass? No. Would I run a bypass? Sure.

I disagree. I see zero reason to bypass oil on a performance engine that is well maintained.

no one cares! your opinion, your engine.

Boy for someone who gives their opinions on other people's trailers cars and engines and calls them junk you sure got a lot of nerve.

You post your stupid ass pics incessantly to feed your shallow ego and you are going to tell me I can't ask opinions I don't think most people even consider it.. I don't see any reason to run a non bypass oil filter on any race engine period and I bet most professional engine builders would agree. I had an actual serious conversation with a supplier and wanted to see what people's justification on running a bypass on a race engine was ........I haven't heard one.

1. You’re an idiot!
2. You are too embarrassed to post photos of your junk!
3. Where did I state you that you can’t post your opinion?
4. You are CLUELESS and You’d lose that bet as many Professional Race Engine builders do infact use oil filters with a bypass on their builds.

quote:

Originally posted by BG7X77:
Why do you believe you would ever have no oil? You hit the nail on the head for the reason I have heard most. I'm truly asking and not being a smart ass.

If your filter fails and clogs up, without a bypass you will need a new motor, simple math here.

For the record, BG's Nova is nice as Fuh-c!!

Small tire too, not a hacked up abomination looking Firebird with a sissy bar!!

As you can see, you will get opinions on both sides. I prefer 100% of my oil to be filtered, as I am sure most / all do. But like Top38 pointed out, a bypass can save your engine in the very rare event some catastrophic filter issue arises, or the owner is a fool. Most racers I know maintain their engines meticulously. But I also have seen some things that make me wonder what people are thinking. Like a guy that put a brand new engine in his wife's car one Spring, had her make a couple "easy" passes on the track to break it in, checked the oil, (didn't change it), and then pronounced that the hood would not open again until the season was over. Now I may be dumb, but I prefer not to advertise the fact. Her engine did not make it through the season.
I personally do not run bypass filters, but I do use the GM oil filter mounts that have a bypass valve built into them. GM called it a "disaster preventer" back in the 60's, and the logic was the same as Top38 said - Dirty oil, (bypassed oil), is better than no oil, (meaning reduced flow due to dirty/clogged filter). But I trust the engineers at GM to provide a more accurately calibrated spring in the filter mount bypass valve, then a piece of stamped sheet metal or rubber in the filter, on a mass-production line, to control when the filter is bypassed. (And because we generally use higher volume/pressure pumps, and spin our engines higher RPM than a grocery getter, I add a small supplementary spring inside the filter mounts on most of my street builds). Got the idea years ago, from a fairly successful Pro-Stock engine builder, who tested the GM bypass valves and said most of them began to open at 40-45 PSI. Is this over-thinking it? Maybe. Did it mean one less thing for me to think about at the track? Yes. Just as having a bypass filter might do for someone else. I use the teflon button to block the bypass valves on my race builds, because my current car has room for the giant 1.5 Quart Wix filter, that will flow more oil volume than any wet-sump pump you can put in the engine. (There is a whole lot to this game, and as we all know, so much of it is mental).

My engines have had a bypass oil filter from the time my engine builder filled them with oil and put it on the dyno and they always will have a bypass oil filter.

quote:

Originally posted by TOP38:

quote:

Originally posted by BG7X77:
Why do you believe you would ever have no oil? You hit the nail on the head for the reason I have heard most. I'm truly asking and not being a smart ass.

If your filter fails and clogs up, without a bypass you will need a new motor, simple math here.

If you have enough junk in a race engine's oil to clog the filter wouldn't the odds be pretty great that you need a new engine already? LOL

I Think it’s a good topic.
On my 427 I have the Schumann small block external bypass to the pan pump. Pressure hot is 55. Then I have the std GM that opens at 50 or so by my tests and the K&R filter we run has a bypass at 58, So yeah we bypass...like Top said; better to have oil than a restricted source.

quote:

Originally posted by 1320racer:
My engines have had a bypass oil filter from the time my engine builder filled them with oil and put it on the dyno and they always will have a bypass oil filter.

“No one cares! Your opinion, your engine”

Try to keep the rods in it this year.

obviously the OP cares. Further it’s the opinion on my engines builders based on their decades of building race engines.

I run TWO of the very large truck type filters (Wix 51794)in parallel and there is no provision for a bypass. Running two of them in parallel reduces restriction and cleans oil better. Both of my race cars are like this, The Dart Iron Eagle 454 SBC and my dry sump aluminum motor. The only disadvantage to this is about 1.5 quarts extra oil but I think that it is well worth it to have cleaner oil with little restriction.

I do NOT run the small Wix race filter. It does not filter out as small of particles as the Street type filters or larger truck filters. It is designed like that so it flows more oil and does not clog as easily or clean oil as well.

I run bushed roller lifters and I want the oil as clean as possible.

You guys can argue about whether to use bypass or not. I do not care if you do or not. I think if you have that much metal and trash to clog the filter your motor then one of two things.
1. You are not changing the oil often enough and or not maintaining your motor right. Or.
2. Your motor is about to go and not going to last much longer bypass or not. Oil should not be getting much trash in it to clog your filter and need a bypass during normal oil life.

I also cut open my oil filters and look for anything unusual or Red Flags indicating a possible problem.

https://www.summitracing.com/p...ZEAQYASABEgKfp_D_BwE

quote:

Originally posted by 1320racer:
obviously the OP cares. Further it’s the opinion on my engines builders based on their decades of building race engines.

Not really from such a hateful person like yourself but many of the others who seem to be able to hold a level of tact and class that you clearly are not capable of, yes, yes I do want to hear their opinions and reasoning.

Not an idiot
Not clueless
May actually be wrong on the engine builder comment and I am man enough to admit when I may be wrong. I would love to know where the top 50 builders in the country fall and why.

I can assure you my car is not junk. It is not a high dollar car but it is not junk. You really are a mean spirited ignorant person on many posts.

http://imgur.com/gallery/3Io3NV9

Not embarrassed just don't see the need. Hope this worked.
I'm sure it will be labeled as home built junk since you need to feel special through demeaning others.

It is nothing special. Solid bracket car.....that's all.

quote:

Originally posted by stk 758 BP!:
I Think it’s a good topic.
On my 427 I have the Schumann small block external bypass to the pan pump. Pressure hot is 55.

With that set up if I understand this right 100% of the oil to the motor is filtered but anything over set pressure returns directly from pump to the oil pan?

If the factory bypass is at 50 PSI then you are bypassing filter when you need it most? Like cold or wide open.

Like I said on my stuff I run two large truck type filters in parallel and that give good filtration with little resistance and there is no bypass. I feel this is the best way and should there be any problem it would show up with higher than normal oil pressure. For many it may not be worth the time, trouble or expense but I think it is worth it.