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1G Ofh low pressure spring for bse

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The low pressure spring won't help you to lower oil pressure. The reason for porting the oil relief valve orifice is because oil is not able make it out of the relief hole fast enough which raises the oil pressure. The current spring already opens enough to prevent a restriction. Even if the lower pressure spring was used, the oil is still is restricted by the orifice, which will still maintain higher oil pressure experienced when deleting balance shafts. Porting only would be my reccomendation to lower oil pressure. How much porting will need done, depends on what oil pressure you see. Obviously, you will want to invest in an oil pressure gauge.
 
The low pressure spring won't help you to lower oil pressure. The reason for porting the oil relief valve orifice is because oil is not able make it out of the relief hole fast enough which raises the oil pressure. The current spring already opens enough to prevent a restriction. Even if the lower pressure spring was used, the oil is still is restricted by the orifice, which will still maintain higher oil pressure experienced when deleting balance shafts. Porting only would be my reccomendation to lower oil pressure. How much porting will need done, depends on what oil pressure you see. Obviously, you will want to invest in an oil pressure gauge.

Yes an oil preasure gauge will be used. Im trying to avoid several removals of oil filter housing once the motors in the car.
 
Yes an oil preasure gauge will be used. Im trying to avoid several removals of oil filter housing once the motors in the car.

A small price and inconvenience to preserve a much more expensive investment.
 
I've read quite a bit on the subject, I am having high oil pressure at the moment. I did port the relief before installing but after looking at a few pics I didn't take out as much as I could have.

On the other hand there have been a few members that have stated that cutting a coil out of their springs did intact help lower the pressure after porting didn't help. How true this is I couldn't really say but my first step is to try porting more, if that doesn't work then I will try the spring to see if it helps.

It makes perfect sense what 2g said above and I've read the same thing from other members but like I said others have stated it has helped them. Take that for what its worth I know its not much but until you actually run your car you should probably just stick to porting.
 
I did some initial porting.. would you go bigger for a first go at it? Ive seen some that are hogged way out. I dont have the motor together yet so im preparing parts

Opinions?
 

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Are you guys running oil squirters or are they deleted? that is actually of more importance than balance shafts when it comes to oil pressure issues.
 
Not sure if this will help, but I recently rebuilt my engine (balance shafts removed). I did the teardrop mod in the head and added the lighter spring that you speak of. My current oil pressure sits at about 65-70 psi when cruising at 3200 rpm. Never really maxed it out because the engine is still fresh. I plan on adding some washers to the ofh or porting it.
 
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I would bellmouth the port on the bottom a bit more, to expose the plunger more when it lifts.

@barza21- I have about the same cruising pressure maybe a touch lower, 70-80 @ 5k plus, I'm totally fine with that. Are u trying to lower cruising pressure? I'm seeing 17-20@idle with 10w30 now and expect it to go up to about 25 with my switch to 20w50, prolly the same cruising
 
I have a feeling that my max psi, once I push it, will be at or above 80-85psi. Kinda high for my liking. I am currently running 10w30 as well. At idle I am seeing about 12psi. From my understanding that idle psi is pretty close to what stock is supposed to be.
 
I have a feeling that my max psi, once I push it, will be at or above 80-85psi. Kinda high for my liking. I am currently running 10w30 as well. At idle I am seeing about 12psi. From my understanding that idle psi is pretty close to what stock is supposed to be.

Personally I'd be ok with those pressures, I see about the same fully warmed up. It's not universal, but the sbc and mod motors I've built see about the same under load. I think with a good pcv system 80-95 under load in higher rpm would be fine. Especially once more boost is applied, upping cylinder pressure. If it were higher at moderate rpms I'd be a little worried, but I think you're right in the money.

I get a lil squeemish with mine idling at the lower pressures, but I know when I change to 20-50 it'll be better.
 
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