One For John K - 7Port Head?
Turbo Mini Forums

I have just seen an adevert for specialist Components that mentions a new 7 port head out in Feb. Can we get any preview information? and maybe even an idea of cost?

have a look here

i think this might have something to do with it

http://www.turbominis.com/forums/index.php?p=vt&tid=323869

luke

Sure, We want to bring a product to market which in complexity terms is a lot easier and quicker to do than the K conversion but offers a whole heap of the benfits of it.

Cost wise it will undercut the cast iron one on the market now.

I take delivery of the proto head early next week once fully built we will have firms costings.

Tech wise, its a one piece machined from billet design, designed to optimise the inlet tract designs and fit larger valves without extra machining. The valve inserts will allow 37/31 valves. The proto head wil run 36.5*31 valves. The inlet tracts are quite small bore to keep the bottom end of the torque curve very healthy as well as flowing at high engine speeds.

Induction, we will be offering a manifold to take motorbike carbs - time permitting we'll dyno this when we do inital engine testing

The centres of the inlets are only 66mm across hence there are no off the shelf throttle bodies to suit, hence in a similar fashion to the K throttles there will be available custom 36mm bore billet throttle bodies for it, with motorsport filter etc - this is how my proto engine will run.

The plan is to get the engine built on an engine syno before Bingley show then bring it up with the figures etc

Any other questions?

JK

If Carling made Mini engines
it would probably be like this one!

ooo I was wondering if anything new will be at Bingley...

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

Probably a stupid question, but how do you machine water galleries into a solid piece of billet? Some very clever piece of machinery, that can bend into all sorts of weird angles?

Cheers

good question - the yanks sometimes make the head in 2 or more pieces then weld the piece together and finish machine - I didn't fancy this option. So there is some very long drilling - from one side of the head to the other, at the heater tap end there will be a cover plate. Where the inlet ports would be on a 5 port there are drillings which go all the way to the edges of the chamber and pass through the long drillings going the other direction. Then there will be the std positions of water way on the A gasket which again meet up with the long drillings going through the head. The proto head will run thermocouples down the cross drillings to monitor temps around the chambers and ports.

JK

If Carling made Mini engines
it would probably be like this one!

cut in 1/2 and use JB weld to put it back together :)

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

hehe

If Carling made Mini engines
it would probably be like this one!

Thats it! I did a search too and could not find it. Thank you

so this is going to be a bolt on conversion then? sounds very interesting John!

I wonder how long it takes before someone links it up with forced induction! could lead to some interesting results....

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

same really, bolt on? or is it a case for new exhaust manifolds and stuff. you said about the inlet...does that rule out webers etc?

you will be able to use std exhaust stuff,

inlet will be SC inlets or adapt some bike carbs/bodies to fit, easy!

Here is my big question that I have been thinking about / contemplating with one of the other 7 port heads out there. I currently run a suck through supercharger setup. What I was thinking was to bolt it to a 7 port head. ie mount my current inlet manifold so that it is effectively trying to blow into a dead end, i would blank the manifold so I didnt have to rely on the gasket. Then make a new single outlet from the manifold that i blow through an intercoller then into a plenum at he fron with fuel injection. What do pepole think. I hope you understand what I am getting at?

John, have you considered an alloy 5 port at all?

Paul

I seriously doubt it!

Paul - I think the 5 port in alloy and cast iron is pretty well covered?

exh - yes it will use the lcb styles of manifold as per normal mini.

supercharging idea - no reason it won't work if you want to mount the charger off the back as per 5 port.

JK

If Carling made Mini engines
it would probably be like this one!

Looking forward to see the dyno results

I seriously doubt it!

I like the 7 port idea, but I agree with Paul W.

I'm stuck with the 5 port for now as I want to see how much of an improvement can be made with fuel injection.

No one has done a billet 5 port. The use of CNC could take it to an all new level.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Any ideas germinating somewhere Paul ?

Rusty by nature

Here you go Paul.

http://www.piercemanifolds.com/cylinderheads.htm

Bottom of the page.

Not sure what the ports of valve centres are like. But a good casting all the same.

Si

I drill holes in everything..!

Wouldnt it be possible to run a head from b series engine? Ive never had my hands on one but from the pictures they look really similair.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

b-series heads are much bigger mike.

If something is worth doing, it's worth doing half of.

Even the best ported 5 port iron head can be improved upon if starting from scratch with billet

I seriously doubt it!

A billet 5 port is top on my wish list for the miglia but i might have to make do with the cast alloy one that med do.