MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG Midget and Sprite Technical - Which Oil Pump?


Hello everyone,

My engine rebuild is progressing incredibly slowly, but I should finally get the block back from the machine shop this week. At last!

I was just about to order my minispares Evo1 cam
http://www.minispares.com/Product.aspx?ty=pb&pid=38279&title=
when I notice that it's based on an A+ cam. So, my (hopefully simple) question is; which oil pump should I be buying to go with it?

in case it's relevant, the engine spec is fairly mild = +.040" overbore, slightly raised compression, stock MG Metro head, HIF44 and maniflow exhaust...

Thanks for the help, all
Mark
MarkH1

Slot drive and make sure the cam is specified as slot drive which I would expect it was. Older cams (Megadyne etc) can be order in either slot or star.
Bob Turbo Midget England

I'd be inclined to go with

http://www.minispares.com/Product.aspx?ty=pb&pid=34203&title=

JB
James Bilsland

To fit the turbo oil pump you would need to "deform" the oil pump cover in the engine backplate. Not a too bigger deal I would say but needs to be eased out.

:)

Must admit that I have been using the turbo pump for a lot of years now without issues irrespective of turbo or normally aspirated application.
Bob Turbo Midget England

Bob, This pump doesn't have the 'fins' that were cast on the back of the Rover turbo oil pump so hopefully no modification required to the pump cover...
James Bilsland

Fins? I don't remember fins.

I fitted a (OE) Turbo pump once and had to modify the cover, as Bob says. I don't remember there being any fins, I just thought the pump body was deeper.
Dave O'Neill2

Probably worth investigating whether it's a good idea to fit the turbo pump to a non turbo engine due to the extra power required and the extra pumping of oil for no good reason and adding extra unwanted heat to the oil as a result. Turbo chargers use a considerable amount of oil to lubricate and especially cool the turbo and its bearings so it pumps a lot of extra oil which isn't required. IIRC around 30% or more compared to a normally aspirated engine oil system.
David Billington

Yep no fins on the ones I have fitted just a deeper body as pointed out.

Dave B I would not argue that point the standard pump is more than capable of supplying normal engines and I suppose any extra oil pumped will result in more work being done and thus result in power reduction, extra heat, etc etc.
Robert (Bob) Midget Turbo

I definitely recall shallow cast fins on the ones I have seen, but that was probably 15 years ago, and I can't find any pics on Google...
James B

This thread was discussed on 16/05/2012

MG Midget and Sprite Technical index

This thread is from the archives. Join the live MG Midget and Sprite Technical BBS now