Anyone got pics...

[johnny_h]

...of a properly ported and polished x-flow head? A burton stage 3 or a vulcan jobbie?

[Toby]

This will be interesting!! Good post Johnnyh

[johnny_h]

[oliwally]

There's no such thing as "stage" with head work,it all needs matching to lift your cam achieves and size of valves.

Stage # is only a gimmic designed to lighten your wallet.

I'd say none if they dont ask about what cam/exhaust/carbs and intended use.

[fiesta_dan]

ask harris horse power coz hes got a vulcan head. i have got pics of mine yet

[Toby]

Yes but....

 

As a guide you could say

 

Stage 1 Ported maybe bigger inlet

Stage 2 Ported more, bigger I & E Valves

Stage 3 Ported even more, even bigger Valves

Stage 4 Biggest mo fo valves, ports

 

And then pick the one that suits your cam / driving!

[johnny_h]

Yes Toby, in the Burtons catalogue the "stage's" correspond with the size of valve fitted normaly. The bigger the valve the higher the stage. No takers yet?

[Mr Sam]

i was going to ask this, doubt many pro builders will share thier secrets though

 

still anyone with one of thier engines can pop the manifold off and have a looksie

[Mr Sam]

http://www.oldskoolford.co.uk/phpBB2/vi ... 764#634764

 

check here mate

[Guest MK1gaz]

i spoke to these guys at the autosport show . Go to www.cncheads.co.uk for lots of nice heads with pictures

[Fiesta Steve]

Only pics of valve throat area, taken about 3 years ago before fitting.

The valves are 41.3mm & 34.9mm

 

 

 

Could possible get pictures of the ports another day, but thats all I got saved on the computer.

[Toby]

i spoke to these guys at the autosport show . Go to www.cncheads.co.uk for lots of nice heads with pictures

 

These I like

[Guest MK1gaz]

i spoke to these guys at the autosport show . Go to www.cncheads.co.uk for lots of nice heads with pictures

 

These I like

They are the bollox . Check out the flow chart on the big valve atmo YB head

[johnny_h]

Cheers guys. will study these and get my dremel out later

[johnny_h]

Awesome! Robbed from http://www.cncheads.co.uk/ford_crossflow.html

 

 

 

 

 

 

 

 

 

 

 

 

 

Some quality work there! I'm still gonna have a pop myself. Fiesta Steve, what type of grinding attatchments did you use, any special material, any tips? CheeeRS

[Toby]

If you look really closely they look like venturi throats. It supposed to speed the air up through the seat. It might be easier and certainly more common to just come straight up the throat to the seat. No reason at ll why you cant have a go.

2 tips.

 

1/ You can gring it off but you can't grind it on!

2/ The area around the valve throat, within an inch of the valve, for a fast road engine is the most important. Make the short turn radius as smooth as possble.

 

 

If you post pictures we'll know your happy with the end result!

[johnny_h]

Cheers Toby, Fingers crossed eh?

[Rick]

crikey

 

must take some serious work to get like that.

 

[Toby]

crikey

 

must take some serious work to get like that.

 

 

They do!!

 

They seem reasonably priced given the work gone into them!

[Fiesta Steve]

Thats how I bought it off ebay m8, if you look you can still see the soot in the exhaust ports

[johnny_h]

I can see this is gonna take a fair few grinding balls!

 

I made a start....

 

Before:

 

After:

 

Before:

 

After:

 

I haven't removed a lot of metal coz I'm shit scared of opening a water jacket.

[Fiesta Steve]

Don't worry to much m8, you can remove alot before hitting water, correct size/shape is important.

 

If you've removed the guide boss you will be needing some new guides fitted.

[Toby]

Very unlikely to hit water - more out of the port please!

[johnny_h]

I'm going to get it converted to unleaded with new bronze guides. I'm open to suggestions to where to get this done as I hear if it's not done properly the seats can fall out or even crack the head. I have had one quote so far from Newark engines for £200 + vat. I'll keep at the ports Toby

[ocean wasp]

I'm going to get it converted to unleaded with new bronze guides. I'm open to suggestions to where to get this done as I hear if it's not done properly the seats can fall out or even crack the head. I have had one quote so far from Newark engines for £200 + vat. I'll keep at the ports Toby

 

W. Drake in Bradford did my old X-flow head for me. Just looked at the invoice and it cost £155 +vat. That got me the unleaded seats, all the valves re-seated and a full set of valve guide sleeves. Just depends where in the country you are, as postage on the head won't be cheap.