Turbo carb with missing pipe
Turbo Mini Forums

Hi,

I am new to turbo mini's, have recently purchased a complete metro turbo engine 12HD26 and have a couple of questions

1. There's a pipe missing on the carb(see arrow) Is this needed and if so how easy to fix?

2. The valve stems on the cylinder head are the same size, I know they should be bigger on the exhaust valves, could this of been some sort of unleaded conversion?

Any help is much appreciated and sorry if these questions have been asked before.

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Edited by sr01 on 31st Jul, 2010.

Think the photo has uploaded now

Edited by sr01 on 31st Jul, 2010.

That needs to be blanked off. Personally I would drill and tap it then fit a suitable grub screw with some thread lock.

EDIT: Welcome to TM

Edited by apbellamy on 31st Jul, 2010.

Thanks apbellamy, someone told me that pipe had a electronic valve connected to it on the metro turbo

humm!
not that easy about the blanking of.
I would say if you'll use about std boost up to 10/12 psi, I would blank it and see, but if you have a bit more in your mind, i would like to use it to blow some "before restrictor" boost in it.

I don't intend using above 10psi boost to begin with, thanks for the info fab

More to the point...why is it an opening ? It shouldnt be open.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Thanks Steve, maybe it is blocked off and i was expecting a brass pipe, I will have another look at it. Cheers

As far as I know none of the Turbo heads were ever unleaded, so it's possible the head has been swapped for an unleaded one. The only way to see is to remove it and see.

WWW.TURBO-MINI.COM

It may be that someone has just replaced the head with a standard head, pre unleaded.

Obviously a standard head will have the standard stem seal sizes and look no different to an unleaded head until you take it apart.

Schrödinger's cat - so which one am I ???

A turbo head has a "T" stampedon it near the thermostat housing. As does the block near the water pump.

Own the day

Not all of the metro turbo heads had the "T" stamped into it, so if you haven't got one then don't rule it out yet, if you have one then theres no doubt.

Edited by Brett on 1st Aug, 2010.

Yes i moved to the darkside

Instagram @jdm_brett

As above, they only occasionally have the "T" stamped on them for some reason.

WWW.TURBO-MINI.COM

Thanks everyone, just had another look at the cylinder head, no T stamped at heater take off, valve stems are both the same diameter and it has double valve springs, think someone changed it over in its previous metro life

Can you see the valve part numbers? they should just be visible on the valve stem below the top cap.

Edited by Mr Joshua on 3rd Aug, 2010.

Own the day

I wouldn't worry about it, I'd say most folks on here aren't running a "Turbo" casting anyway.

WWW.TURBO-MINI.COM

If he has the larger MG valves fitted then he may only need to have work done to the exhaust valves but it may all be done.

Own the day

Had another look this afternoon at the head, I think the exhaust valve number is TAM1061, can't make out what the inlet is.

Also uploaded some pics

Edited by sr01 on 5th Aug, 2010.

Then I would guess the others are TAM1059 which could mean you have a MG1275 spec head in which case you will only need to change the Exhaust valves for some SS steel affairs and your good to go.

Own the day