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Gas flowed zetec head
leon51274 - 5/2/15 at 11:44 AM

Morning Guys

I'm currently looking at a gas flowed silvertop zetec head on ebay:
Ford Zetec 2.0 Gas Flowed Silver Top Cylinder Head

Apparently the sellers project was for it to go on a turbo conversion engine, am I right in thinking that they skim the head more for a turbo engine than a N/A engine for compression reasons? If so would this be no good on my N/A engine?

Cheers

bi22le - 5/2/15 at 12:20 PM

Other way round.

You want to lower the CR for forced induction and therefore add a thicker gasket.

Unless the head was skimmed during the work just to make sure its all square and fits flush.

leon51274 - 5/2/15 at 01:06 PM

I always struggle to get my head around compression etc!

So do you skim less for turbo and more for n/a?

MikeRJ - 5/2/15 at 01:25 PM

quote:
Originally posted by leon51274
I always struggle to get my head around compression etc!

So do you skim less for turbo and more for n/a?


The more you skim off a head, the smaller the combustion chamber becomes, and therefore the higher the compression ratio.

When tuning normally aspirated engines, a higher compression ratio is often desirable, especially if fitting longer duration cams.

For forced induction applications you don't usually want a higher than standard compression, and quite often you want a lower compression than standard (e.g. using a thicker head gasket).

Dick - 5/2/15 at 02:28 PM

Save your money if that's a fully ported head then god help us those valve really look like new exhust (not) have a look on the net about valve sizes in zetec heads your be surprised

If you want a good head the it wont be cheap and it wont be on ebay

DW100 - 5/2/15 at 02:50 PM

Just looked at the head.

Can't see in that picture if any porting has been done at all.

And if it has no caps for the cam journals then its scrap, as they are individually machined to the head during production and cannot be swapped from another.

Seller had added "SOLD AS SEEN"

leon51274 - 5/2/15 at 02:58 PM

You'll do for me lads, I'm staying clear!

Thanks for the input, as always much appreciated.

Cheers
Leon

Nickp - 5/2/15 at 05:01 PM

quote:
Originally posted by DW100
Just looked at the head.

Can't see in that picture if any porting has been done at all.

And if it has no caps for the cam journals then its scrap, as they are individually machined to the head during production and cannot be swapped from another.

Seller had added "SOLD AS SEEN"


Looks like it's had some 'work' but would agree it's scrap without cam caps.