Holden VL Turbo Commodore Turbosmart Oil Pressure Regulator Install

[@jacktorana8628]

Another top job there Dale, hope disconnecting and re-connecting wont be done too often.

[@dalevloghlan8771]

Yeah I agree, I will eventually drain it straight to the sump, however pulling the motor out at this point in time just to do that didn’t seem worth while. Let’s see how long I keep it there haha

[@brassashtray6612]

Long time no see !! Another top video. Thanks 🙏🏼

[@dalevloghlan8771]

Thanks mate, it’s been awhile haha I’ve been hibernating lol

[@kaycoghlan1837]

Awesome work Dale

[@ahmedalshamsi6078]

wasn't the rb30 et oiL pump ideaL for your combo? cuz I'm now gathering some info so I be abLe to buiLd the unbreakabLe rb30 for my daiLy use. Looking for 350hp not more I guess it wiLL be enough to stick with the rb30 et oiL pump.. whats your thoughts

[@claudiumxg1]

Hi, very nice setup!!!, dumb question: how does the opr 40 affect the engine oil pressure?

[@dalevloghlan8771]

It’s basically a ball and spring inside, once the spring tension is overcome it bypasses the oil to the return side only allowing a certain amount of pressure to the turbo. It has no affect on the actual engine oil pressure the pump puts out.

[@claudiumxg1]

@@dalevloghlan8771 i got one installed but not started engine yet, and just realised if this is like.a fuel.regulator and not like hydraulic valve( oil pressure controll on both sides of the plunger) will bassically work like the man pump.bypass, i belive oil pressure will be limited on high rpm

[@dalevloghlan8771]

Yeah pretty much, what it means is your turbo will get the same amount of oil pressure at all stages of the rev range, thus preventing too much oil pressure to the turbo at high rpm so it doesn’t leak past the seals.

[@claudiumxg1]

@@dalevloghlan8771 yes i.understand, but i was refearing to block.pressure, if this is just a bypass it will also.limit the block.pressure to 40?

[@dalevloghlan8771]

No mate, that’s incorrect and not how fluid dynamics works. The pressure from the pump is controlled via the relief valve in the pump right after the output from the pump gears, meaning all the components the oil galleries travel to will get that same pressure taking into account losses for the distance travelled and size of the galleries etc. The OPR 40 installs in the turbo oil feed and gets the same oil pressure the pump produces at the inlet, it allows the turbo to get the desired pressure as per the preset tension, the excess oil is then relieved out of the OPR drain and then back to the sump therefore having no effect on the actual pressure inside the block.

[@heathhouston7815]

Hi, curious if you went back to the normal size restriction fitting for the turbo? Or did you find that the OPR eliminates the need?

[@dalevloghlan8771]

Originally I ran it without a restrictor as that was what Turbosmart recommends. The OPR got my feed pressure down to about 50psi at operating temp, although it’s meant to be 40psi regulator, I put this down to the high output pressure of my oil pump. I got a little paranoid and since then I have been running the OPR with a restrictor and have been experiencing no issues 👌🏼

[@heathhouston7815]

@@dalevloghlan8771 That is what I thought as well. I am.paranood to run mine without any kind of restriction as I am running a Blouch ball bearing turbo. Did you use the stock size restrictor?

[@dalevloghlan8771]

Yes I used a 1mm restrictor.

[@heathhouston7815]

Thanks man...appreciate the advice!

[@dalevloghlan8771]

No worries mate, best of luck.