I seen in a thread in the "engine" section where someone recommended blocking the oil filter bypass on a new 383ci. Is that what most do here for a street/strip or performance street car? I have seen it mentioned occassionaly here but always thought maybe directed more towards race only applications. Now I am not sure.:confused:
What says ye ???

Mine's plugged. Actually, using an aftermarket filter mount that doesn't provide a bypass.
Just use a quality oil filter (K&N, NAPA gold, WIX) and let the engine warm up real good before revving.

What Bill said !! have been plugging bypass in perf engines for years I use Wix filters from NAPA low rpm til temp comes up a bit and no straight weight heavy oil......... especially on fresh motor like to see what gets trapped by filter I still cut the filters open occasionally even after break in etc .......

Thanks guys
Whats involved with plugging the bypass? Can the plug and spring be removed then maybe just tap the hole for a pipe plug?

exactly. a 1/4 NPT will start, but it has to be driven in almost all the way to get the plug to go in far enough to not interfere with oil filter tightening.

Here is what I posted on the engine site.

We plug all the bypasses on the SBC we build even the performance street engines we have built but the trick is tio use a good filter that has good flow, filter media that can support the flow of oil as we have seen on the Fram filters that guys have called from the track to say there oil pressure is only 35 pounds oil pressure and just going back to the Wix or NAPA filter tha has much more filter paper per square inch and better media there oil prssure is back to 60 pounds where it should be.

So what this tell you that using a SUB STANDARD filter that with the bypass not plugged that the oil is being bypassed and sending unfiltered oil through the engine this happens more with the heavier oils.

We have seen what happens when the bypasses are not plugged.

And a good oil we recomend is the 15/40 Rotella T oil or the Brad Penn 20/50 oil which is the old green Kendall oil.

Remember if the 20/50 oil does not say racing oil on it it should not be used in a performance application.

Thanks guys
Whats involved with plugging the bypass? Can the plug and spring be removed then maybe just tap the hole for a pipe plug?

Hey blumont, if this is the engine Randy at ProStock was involved with I would be suprised if your bypass isn't already plugged. He may have just done it without asking because it's standard procedure.

Randy at Pro Stock is good people....

Hey blumont, if this is the engine Randy at ProStock was involved with I would be suprised if your bypass isn't already plugged. He may have just done it without asking because it's standard procedure.

Ryan, I had Randy just do the machining on the block. The bypass definately is not plugged right now. But will be

I already use K&N oil filters so should be good to go there. I like them for the nut on the bottom of the cannister. Saves on the burnt epidermis :D

Thanks

I would like to know the reason for the plugged bypass and why when it is plugged you keep the rpms down?

Mine's plugged. Actually, using an aftermarket filter mount that doesn't provide a bypass.
Just use a quality oil filter (K&N, NAPA gold, WIX) and let the engine warm up real good before revving.

O.K. WHO'S
WHERE I GET ONE

I would like to know the reason for the plugged bypass and why when it is plugged you keep the rpms down?

With the bypass plugged all oil has to go through the filter.

And You Keep The Rpms Down Until The Oil Warms Up So You Don't Blow The Filter Apart.

Plugged....i use K&N or Wix filters.....no problems.

Randy at Pro Stock is good people....

You know Randy?

Randy does the majority of my machining and I buy most of my parts through him. He treats me like gold and even gave me free parts when I went to the PGD's. :thumbsup:

I have steered quite a few friends towards him after having local workmanship issues and I do not have one unhappy customer. He freshened my friend's 638 big chief engine and it ran hard, consistently, and the filters were 100% clean every time he cuts them open.

dosn't most oil filter have an oil bypass built right into them?

And You Keep The Rpms Down Until The Oil Warms Up So You Don't Blow The Filter Apart.

We have a lot of circle track guys that get hardly any heat in there engines before the green flag drops and so far using a good filter we have never seen one blow apart so for.

We have a lot of circle track guys that get hardly any heat in there engines before the green flag drops and so far using a good filter we have never seen one blow apart so for.

Me either:) but you know what they say.
I know on the WIX filters most are burst psi rated t0 280-350psi depending on the filter.

And yes many filters have a bypass built into them. Old school chevy type filters, do not.