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Section : Car Preparation
Posted By : James Carruthers, 10-Apr-2004,
11:08pm
Righto...
Do I need to modify my manifold gasket so as the metal doesnt get in the way?
With a standard head the gasket has about 1.5mm of space between the port and the gasket - presumably because the gasket squashes and the hole reduces
slightly.
However the holes in my ported head are just ever so slightly bigger than the holes in the gasket.
Am I making sense?
(the photo doesnt mean anything - I just thought it looked cool)
James
Gaskets & Ported heads
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Posted By : Andy Vowell, 10-Apr-2004,
11:31pm
To get the best perfomance from the porting the gasket needs to be out the way, Two choices
1. Cut/file/dremel the holes bigger
2. Buy a 1500 gasket that has bigger holes
Cheers
Andy
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Posted By : James Carruthers, 10-Apr-2004,
11:34pm
Andy,
Think I'll have to dremel them bigger then - as the gasket I have is a 1500 one...
James
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Posted By : William Davies,
11-Apr-2004, 12:52pm
Surely the 1500 and 1300 gaskets are the same size? The post FH25000 MkIV engine uses the same gasket as the 1500, the only difference I am aware
of between this and the earlier engine is the recessed bore, the gasket is modified accordingly. To achieve 1493cc the 1296 engine was stroked,
bore remained constant,
Cheers,
Bill.
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Posted By : Andy Vowell,
11-Apr-2004, 07:34pm
Well now I'm not so sure. I do know that there are gaskets out there that are different sizes as in my early racing days I opened out the holes
but now when I go round shows to get up a good supply of gaskets (needed for racing) I have found some types to be bigger which I had assumed
to be 1500's.
Perhaps its down to different manufacturers
Cheers
Andy
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Posted By : Michael Davis,
11-Apr-2004, 08:34pm
I think James was meaning the manifold gasket rather than the head gasket
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Posted By : Don Cook, 11-Apr-2004, 02:30pm
Wish I could have been there chaps, would loved to have seen Mik dressed sensibly! Trouble is my house is going on the market and I've a s**t load of
painting and other stuff to do.
Now Jimmy - is that really your port? How long did it taken and what did you use. Also what's the opinion of the racers about trimming/tapering off the
guide for better flow?
Tins of paint beckoning...
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Posted By : James Carruthers, 11-Apr-2004,
02:56pm
Donny,
That really is my port - and it took me all of 3 minutes to write the cheque for it.
Now that I posses a ported head I think I might have a go at it myself - use this one as a guide to do another one. I plan on making as many
measurements etc as possible and then trying to copy it on a spare head.
You're welcome to come around and have a look at my head - though it will be on the car pretty soon.
Anyone know how similar is the GT6 head to the Spitfire one? Is it just extended by 2 cylinders?
After being in Tim Bancrofts GT6 with stage 2 head I reckon its a must have...
James