What oil to run SPG roller Crank ?

[71CALRIPPER]

What engine oil would you use for an SPG roller crank?

Engine in Question:




Full engine specs just incase anything changes the choice...



Type 1 1641 Engine Specification.


Built on new genuine VW Brazilian universal crankcase.
New 8mm stud kit.
Tapped for full flow oil filtration.
EMPI monster 34mm gear oil pump with integral O ringed front oil take off cover plate.
Pump gears modified with bronze shims to control and maintain end float of gears.
-10 braided oil hose with anodised aluminium hose connectors.
Twin remote (under wing) standard VW cartridge oil filters and heat diffusers.
Modified oil pick up with sump bump extension.
Modified oil surge / windage tray.
Scat oil pressure control valves and springs.
Engle 110 camshaft.
Twin thrust face camshaft bearings.
Scat cam followers.
Melling NOS chrome moly pushrods
SPG Roller bearing 69mm crankshaft
SPG std main bearing set with necessart integral oil spray facilitiy for roller big end lubrication - modified by Rimco in Santa Ana California.
Mahle 87mm barrel and piston kit.
Type 3 under cylinder cool tins.
Crown aluminium superlight flywheel 6.5ib. (Relatively heavy SPG does not need heavy flywheel and will not be pulled out of alighnment by light flywheel compared to the intertia snatch from a stock unit.)
Silicon flywheel seal.
EMPI chrome moly heavy duty flywheel gland nut.
LUK 200mm transporter clutch.
New cylinder heads.
44 inlet
40 exhaust
Stainless valves.
Bugpack valve springs.
EMPI valve spring retainers.
Scat (Bicentinary 1976) bolt up cast alloy vale covers.
Fitted with twin crankcase vent filters.
Treuhaft 1.25 : 1 Rocker shafts and rockers.
Honda swivel foot adjusting screws.
Scat gold anodised telescopic push rod tubes.
Silicon push rod tube seals.
New heat exchangers.
Standard stainless steel exhaust box with lamda sensor fitted for air fuel gauge.
Standard stainless steel tail pipes.
Gene Berg small equailser crank pulley.
Chrome crank pulley nut.
Bosch TCI- H transisterised contactless ignition.
VW TCI - H Ignition loom.
VW TCI - H Ignition module and heat sink.
NOS distributor.
Mallory 11mm silicon HT leads.
Bosch platinum spark plugs.
Weber 40 IDF cast alloy manifolds match ported to cyclinder heads.
Weber 36IDF carburettors.
Carburettors fitted with cableless hydraulic manual choke operating system.
Ford quick release fuel pipe fittings.
Custom made carburettor linkage.
K&N Type chrome filters with 40mm elements.
Walbro electric fuel pump.
Malpassi filter king fuel pressure regulator & filter.
Rear engine traction bar.
Stuart Hall Type 1 flat fan cooling conversion. One of a kind horizontal Porsche 911 cooling fan.
Fibreglass fan shroud. Interfaces with all originial Volkswagen rear and under tinware.
Type 3 horizontal oilcooler inside fan shroud!!
Additional small Mocal oil cooler & braded hose also inside fan housing.
Johnnys Speed & Chrome oil cooler sandwich plate.
Porsche 911 Fan and alternator - recon with external regulator.
Idler pulley mount.
Oil filler tube & Porsche 944 oil cap.
Chrome dipstick.
Tig welded aluminium crankcase breather box.
Braided stainless breather hose.
All assembled with stainless fasteners.
Brass exhaust nuts.

[MC Dyno Don]

  Ive had quite a few roller engines in my time and have always run 30 wt oil and NO synthetic..!! The bigger issue is the large volume oil pump which with anything else but a multi grade such as 10/30..20/30..30 wt, the engine will most likely suffer. You have done a good job thus far so my suggestion remains. The bearings ride on a "cushion" of oil and need to enshure that the oil is able to lubricate without obstruction. Roller engines are very reliable work horses and are designed to run with minimal pressure but you will be fine if you keep a good oil such as valvoline 30wt. racing oil which has more Zinc. Anything over 60lbs of oil pressure is excessive in my opinion. The recommended norm is usually 10lbs of pressure per every 1k rpm But in a roller engine it is not as critical. I have witnessed roller engines that actually lost oil pressure and kept running long after in a few off road situations. Be somewhat cautious upon cold start ups as with a large pump as in your project, The initial pressure could be quite excessive so use common sense and if using a gage, keep an eye on cold and warm operating temps to give you some idea of what pressure resides inside. All things considered you should be fine and have a sweet running engine that will rev to the moon.  Enjoy..!! Hope this helps you..? Dyno

[71CALRIPPER]

Wow.. you cant buy that sort of detail..

Thank you

Plenty to work from

[glenn]

Sorry but I just don't get it.

44x40 valves in a 87mm cylinder, do they even fit?

44mm oil pump, how does it not piss oil past the slinger?

36IDFs and W110 cam, sounds mild, I just don't get it.

[71CALRIPPER]

Sorry but I just don't get it.

44x40 valves in a 87mm cylinder, do they even fit?

44mm oil pump, how does it not piss oil past the slinger?

36IDFs and W110 cam, sounds mild, I just don't get it.

Trust me loads of things I don't get either...which is why I am going through it now

[Zach Gomulka]

Sorry but I just don't get it.

44x40 valves in a 87mm cylinder, do they even fit?

44mm oil pump, how does it not piss oil past the slinger?

36IDFs and W110 cam, sounds mild, I just don't get it.

My thoughts exactly!
I'm sure once you open it up the specs will be different.

[71CALRIPPER]

I have photos of the build I can put up.. will do later

[71CALRIPPER]

Right Valve size





Anyway to tell what size pump we have here

[nicolas]

yes, measure the hight of the gear. that is the size.

[fish]

Bradd Penn SAE 30 HP is extremely good oil

BTW very cool looking engine compartment, like others have said a lot of things that don't make sense........those valves look waay too shrouded and ports are tiny for the 44/40 valves installed in anorexic heads, bin the 87mm and install some bigger 94mm or 92mm thick wall P/B giving you room to open the chambers and un-shroud the valves, while at it get the heads ported
The EMPI HD Aluminium pump is 32mm, so it might still be ok but overkill for the engine.

[71CALRIPPER]

I purchased the car for a daily but the whole car has a massive spec in terms of engineering I think this might be a little to off the wall for a daily.

[58vw]

what did you go and get now...