Which head do I have - On the car, not me!

[byd1380]

I am thinking of getting a inlet manifold made for either Motorbike Carb's or throttle bodies, but just wondering what head type I have, so I can get an inlet manifold gasket. I have a 4age with TVIS, but whick type, small, large port etc, Is there a marking on the head or inlet.

Thanks

Ivan

[jamiemirror]

TVIS=bigport head.
65mm wide ports - just measure. Small ports are 50mm wide.

[byd1380]

What measurement do you mean? The actual throttle body itself.

http://www.aeu86.org/viewtopic.php?t=270...=mg+midget

Here is a link with a pic attached.

hope this helps

Cheers

Ivan

[jamiemirror]

http://www.billzilla.org/4agstock.htm



I mean dimensions of intake port in the head.

PS: I can deliver intake adapter for bigport head to sidedraught Weber/Delorto/Solex pattern (check my thread in Commersial Sales section - if pictures don't work I can send via e-mail).

[SekiguchiUeno]

jamie i have one question on you, the diffrence between carbs flanges
solex vs weber.
i have addhe and my friend one weber i am not sure about type, they have identical hole diameters and positions but the mounting points dont match.

[byd1380]

is there any way of telling without taking the inlet manifold off the car?

Cheers

Ivan

[peter møller]

If you are sure it´s an TVIS, then there is no doubt.....you´ll need the bigport gasket.
Look between the manifold and head, is there a plate about 2cm thick? If so, it´s most likely a TVIS engine/bigport.
Also look at the inlet manifold, if it´s "clean" on top without "ribbles" then it´s a TVIS/bigport manifold.
All of this of course, is with respect to the fact that an adapter plate from bigport-manifold to small port head can be installed previously, allthough very unlikely.
Make sense?

[peter møller]

just had a look at you´re engine bay shot.....you have a TVIS/Bigport engine.
But to be 100% sure no-one has installed the smallport top to the largeport manifold.....you´ll need to remove the inlet manifold.

[SekiguchiUeno]

the engine in midget is bigport

[byd1380]

thanks guys,

Have to decide now whether to go for carbs or throttle bodies. The carbs are working out alot cheaper. decisions, decisions!!

Cheers

Ivan