Thread:

bbc oil restrictors?

i'm going to go solid roller this weekend and want to know what size restrictors people are useing. i think you can get between .50-.80 to go into the back of the block, does it matter that much for what i'm doing or is it more just that i need them in and doesn;t matter what size? fairly mild bbc but do have high volumn pump with 10qt dooley pan. just want to make sure i'm not going to run the bottom end dry. thanks, AP

Originally Posted by ap67et10

i'm going to go solid roller this weekend and want to know what size restrictors people are useing. i think you can get between .50-.80 to go into the back of the block, does it matter that much for what i'm doing or is it more just that i need them in and doesn;t matter what size? fairly mild bbc but do have high volumn pump with 10qt dooley pan. just want to make sure i'm not going to run the bottom end dry. thanks, AP

Personaly I would not use any, BBC's don't typicaly put as much oil on top llike a SBC. Every motor may act different tho. Does/did your motor ever spray oil across the room with the V covers off. I have yet to see a BBC do that. Although like I say some may, just none I have done. I would run it first and see. Proper windage and good drain back should be your focus. IMHO

Big Chevy's don't really have any drainback issues, so really do not need restrictors.


Also, IMO, you have no need for a huge volume pump unless you plan on filling very loose bearing tolerances with it.

Proper presure with ENOUGH flow, more work from the pump wastes HP, breaks distrib. drive roll pins (and pump drive shafts), and just generally makes a mess of a good working system.

"More oil flow MUST be better tho, and the only thing better than more, is even more."

just dont!!!!

wow this is weird i have put several sets of these things in never ever had issues why in the hell would you want to put extra oil up top with solidsyou dont need it up there,oh ive heard to cool springs of,b.s imo there is still plenty getting there just not drownding the hell outta your valvetrain.i use the .060 ones,oh well we all have what we think is best just funny that every body i have ever dealt with if you go solid you need them.good luck on whatever you decide

i'm pretty sure i'm going to use them. it seems like an easy choice. you have very little need for any kind of excess oil on the top (especially with solids) and in a jet you have 3-4000 rpms at normal cruise with about 60-80% load on the engine for sometimes as long as 20...30...40 min almost constant (depending on how big the lake is or where you're going on the river) but to me it seems that you especially don't need the (possibly) excess oil on top so why put it there when a $15 parts could remedy it.

my thoughts are that i am choosing the better of two possibilities in that i can restrict the oil up top because i really don't need it there, or i could just leave it flowing how it is (which may be perfectly fine) but there is the possiblity to starve the bottom which to me that seems to = very bad things and a lot of money.

am i off??

could or am i hurting anything at all by putting them in?

could or am i hurting anything at all by not putting them in?

thanks, AP

Oh yea thats right GM has been using them for years. LOL- go for it thats what keeps the aftermarket guys in business

can you give me a good reason not to run them? other than gm doesn't? i'm not really into the doing what other people (or manufacturers) are doing just because. i'm kind of big on having a specific reason. id rather have a choice and make it based on facts and pros and cons that are more closely related to my situatioin. just curious but why whould i ever run the engine with the covers off?

AP

they did sell them with solids though...at one point.

so why you against it?

oops answered your answer to fasterthanu coment. hard to keep all the sarcastic comments straight.