Oil bypass, do you block it?
 

On a SBC the oil bypass is in the oil filter adapter, I'm not sure on other motors. Do you block it to avoid oil bypassing the filter? I've read info arguing both ways.

Re: Oil bypass, do you block it?
 

I block mine. You must run an oil filter capable of handling the increased flow through it. I use the K&N HP3002.
Dan

Re: Oil bypass, do you block it?
 

I have blocked a couple for customers that wanted them that way but like Dan said you absolutely must run a good racing type filter and be willing to warm the engine up some before getting your foot in it.

I have also seen two nice engines ruined because the owners used a cheap filter that came apart and blocked the oil passage going into the block :(

Re: Oil bypass, do you block it?
 

I've blocked them in the past and used Wix filters, both standard and racing. I've never had any problems but it does make sense that the oil can't pass through the filter fast enough especially on launch. Cold oil and high viscosity would also slow the flow through the filter with no bypass.

Re: Oil bypass, do you block it?
 

I have block all of mine and use 1061 NAPA gold as it has a 19 micron rating VS the filters which have a 51 Micron rating.

No issues to date.

Re: Oil bypass, do you block it?
 

Dirty oil is better than no oil.......

Re: Oil bypass, do you block it?
 

A good case here. You have to know what your doing when building an engine and what parts to use,

I have always blocked the bypass and no problems to date, If you know what your doing it works.

Re: Oil bypass, do you block it?
 

Been blocking mine for over thirty years, never an issue. Clean oil.
1061 NAPA filters. Made by WIX.

Re: Oil bypass, do you block it?
 

x100000000000000000000000000000000000000000

Re: Oil bypass, do you block it?
 

Interesting how now word is that Wix has been manufacturing out of the country and quality has dropped. Anyone have any info on Wix quality?

Re: Oil bypass, do you block it?
 

We buy a very large number of Wix filters every year and nothing looks any different to me quality wise.

Oil, air, fuel and coolant filters.

We have a very large dedicated filter room and stock hundreds.

From small machines to very large, they all get routine service and we use primarily Wix and NAPA if we need something we don’t have.

Wix makes NAPA’s filters

Re: Oil bypass, do you block it?
 

Read this

https://rehermorrison.com/tech-talk-...is-everything/

Re: Oil bypass, do you block it?
 

This is what he wrote (It’s better to allow a little trash to circulate inside the engine than to risk a catastrophic failure due to insufficient oil flow.”)

Why would anyone want any trash to circulate through there engine??? What a joke

I have been doing this for 45 years as well and no problems but you have to know what your doing when block a bypass.

Re: Oil bypass, do you block it?
 

I went to Napa for a 1061 but all they had was a 1060. are they both the same ?

Re: Oil bypass, do you block it?
 

Higher burst pressure on the 1061? 285psi vs 270psi on the 1060 per specs, everything else seems the same.

Re: Oil bypass, do you block it?
 

51060 has an anti drain back valve and 51061 does not.

Same filter other than that.

51060 is used for horizontal type mounting....
51061 is for vertical type mounting....

That "valve" is really just a red silicone rubber flap...

You can look at the top and see it covering the holes on any Wix filter that has the anti drain back feature...

Lots of machines mount the filter off the side......and many vehicles.

Without the valve you'll hear a nasty rattle everytime you start your engine for a couple seconds...or a valve that's not working...

I had a 454 pickup that was 4 wheel drive and some various brand filters did not do a good job of retaining oil …and if I heard the rattle I'd replace that filter.....

Wix never had that issue...

Re: Oil bypass, do you block it?
 

What Rich said about the anti-drainback valve is correct. I've used both part numbers interchangeably on my BBC race engines forever.

Re: Oil bypass, do you block it?
 

Thanks for the info

Re: Oil bypass, do you block it?
 

Interesting Rich, is it listed in the spec somewhere and I missed it? Had a few stores try to sell me filters w/o the anti drain back for my Buick, always passed figuring it would enhance the mess when I changed it.

Re: Oil bypass, do you block it?
 

If you look in a Wix filter book it lists everything as far as specs but doesn't say anything about how a filter is mounted

Numerous engines mount the filter other then straight up and down...….and everytime you start it oil pressure takes longer to build up as it fills the filter that drained back.

Never gave it much thought myself until I read the catalog.....

Physical size, thread size, with or without the anti drain back feature....probably more info but I don't have a catalog handy...

I did go look at a 51060 and a 51061 just to be sure I had the info correct...

Those are std length filters....

They also make a shorter length and a 2 quart "truck" filter.....

Some are labeled Extended Life....

I use the 51061 R on my engines and have for years.....Bought them by the case...

We buy from Filter One.....Nobody comes close to their prices and they ship UPS...

Only issue is they do a very poor job boxing filters for shipment.....Some get damaged or boxes busted up.....occasionally....

Re: Oil bypass, do you block it?
 

I don't use the R=filters they have a 51 Micron rating the 1061 have a 21 Micron rating