COME Racing Holden V8 oiling system mods

There are so many complaints about the Holden V8 oiling system, that it's actually quite annoying till one puts things in perspective. Do you realise the Holden V8 was designed in Detroit Michigan for General Motors Holden in 1965? Given the engine began life in production Holden vehicles in 1969 we need to step back and give our Australian built "plastic" V8 a little breathing room. Considering the insane power outputs we have forced our Holden V8's to produce it's no wonder the oiling system does not always keep pace.
It's really like taking a conventional points type distributor and putting it in a 1300hp Pro Stock Drag Race engine and expecting it to adequately light that engines fire. It will happen, maybe but it will not be effective at all.
On the other hand the 308ci version of the Holden V8 was really never expected to make much more power than the originally factory claimed 240bhp. With 240 or even up to 300 or so bhp the oiling system is great. In fact we have found that unless you achieve power levels well over the 500bhp mark the stock oiling system with the best possible oil pan fitted, best possible oil pump and a few minor blueprinting steps will serve you very reliably.
This changes of course if the application is any form of endurance work like boat, speedway, circuit or similar race applications. It's from this point on the you either bite the bullet and go Dry Sump setup or at least look at some simple mods we will demonstrate here to prioritise the oiling system for very few dollars.
These mods mean theat both lifter bores and main bearings are flushed with large volumes of oil instantly which optimises valve train operation and just as importantly, longer more reliable main and rod bearing life.

[@marshal1808]

Thank you so much for this amazing series of videos, finally here is some very informative and professionally done videos on an iconic Australian V8 engine. Sir I hope that you continue to make more amazing videos. All the best.Regards.

[@farkenfigjam8732]

I don't know why, but old mate talking about the typical lifter tick on startup made me chuckle a bit. Love my 5Ls. Even with all their faults

[@mAdAsZaC]

I liked the addition of information to the description it was a good read, thanks

[@No_soup_for_you]

Another excellent video. Thank you for the detailed explanation.

[@blairo15]

Another great video! Thanks for your insight! Awesome!

[@ashleypope3363]

+1 on the oil restrictor size- I'd love to do this as opposed to the massively overcomplicated way...

[@petercunningham3469]

Edge orifice solid lifters and the cam bearings installed correctly works pretty good too, oil flows to the path of least resistance so if your clearances are loose then that's were the oils leaking ,good info for higher end engines but obviously these mods should be left to experienced engine guys, good post

[@jimclarke1108]

Great video

[@thewholls7176]

Niiiiic I assume we are already running high volume oil pump…..?

[@kaveshmaharaj533]

Thanks very much for the good videos. My question is my 308 is stripped down for a rebuild. My motor will only be used on the street for mostly normal driving. Is this modification really necessary for my application. I would really like decent oil pressure when hot at idle as this will ensure the motor last. In the past I have relied on thicker oils to help bump up the pressure. I would appreciate your input. Thanks

[@jamesclark4680]

great video would like to know what size restrictor to use on number 4 cam or what size hole should be drilled so I dont need a restrictor

[@Amack1964]

what size is the restrictor hole

[@ashleypope3363]

Is it a standard chev .0625" restrictor??

[@abidansari9467]

Plate cam grinding machine video send me