Griffon Kit Car

Do you have a Viva Based kit car ? well here is the place to try and get some advice, help and information.

Re: Griffon Kit Car

Postby shamm » Sun Mar 03, 2013 6:55 pm

Not a problem, just let me know at the time.
I have most bits around, just ask.
Steve Hammond

Two 2.3 Viva's, one 2.3 Viva Estate, one 2.3 Magnum estate, half share in a 1.6 Viva auto, and no time (HC183)
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shamm
Brabham Viva
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Re: Griffon Kit Car

Postby Paul-61 » Sun Mar 17, 2013 5:58 pm

I have stripped and cleaned the head and I'm really suprised at how badly cast it is!!
The inlet and exhaust ports have massive casting lines in them.

Before I get grinding.... does anyone else know if a) this was normal on a Magnum and b) would I get any noticeable benefit from it??
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Paul-61
De Luxe Viva
De Luxe Viva
 
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Re: Griffon Kit Car

Postby shamm » Sun Mar 17, 2013 7:12 pm

The casting quality was not great and yes a cleanup will benefit performance.
Just don't leave the inlets smooth, a rough surface improves turbulence and swirl.
Steve Hammond

Two 2.3 Viva's, one 2.3 Viva Estate, one 2.3 Magnum estate, half share in a 1.6 Viva auto, and no time (HC183)
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shamm
Brabham Viva
Brabham Viva
 
Posts: 858
Joined: Wed Nov 02, 2005 10:36 pm
Location: Essex, UK

Re: Griffon Kit Car

Postby Paul-61 » Sun Mar 17, 2013 8:39 pm

Thanks for that - Dremmel and porting files it is then.
I might even get the engine back together for Easter, if the weather ever improves!
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Paul-61
De Luxe Viva
De Luxe Viva
 
Posts: 14
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Location: East Anglia

Re: Griffon Kit Car

Postby Paul-61 » Thu Mar 21, 2013 8:50 pm

Started to clean out the ports.
I matched the new inlet and exhaust gaskets to the head and dressed the lip line of the ports to within 2mm.
Removed the casting lumps from the ports and spot-faced the bolt holes as far as possible.
Although it looks like it has black or brown marks in the pictures these are only reflections - it's all a dull grey really.
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Paul-61
De Luxe Viva
De Luxe Viva
 
Posts: 14
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Location: East Anglia

Re: Griffon Kit Car

Postby Paul-61 » Sun Mar 31, 2013 3:25 pm

This rebuild is not going as fast as I would like !!
With hidsight, working in my front garden, in the coldest March on record was not my cleverest decision..

However the decoke is done and the rebuild can wait until the end of this Ice-Age.
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Paul-61
De Luxe Viva
De Luxe Viva
 
Posts: 14
Joined: Sun Feb 03, 2013 12:42 pm
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