Shooter63
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| posted on 23/4/15 at 08:02 PM |
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Zetec silvertop head 1.8 on a 2.0
Hi all,
I just want to make sure, I've looked on here and it seems that the 1.8 head is a straight fit onto the 2.0 except for a slight increase in comp
ratio. I fancy dusting down the old die grinder, burrs and rolls and having a bit of a play but the only heads I can find for sale are 1.8s. If they
are ok I'll get one.
Shooter
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austin man
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| posted on 23/4/15 at 08:15 PM |
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yes it fits but put the 2 litre cams back in we saw a 10 bhp increase on a turbod 2 litre when the 1.8 head was fitted
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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Paul Turner
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| posted on 24/4/15 at 01:30 PM |
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Indeed it is a strait fit and if its cheap enough and in good condition a useful upgrade.
But don't waste you time doing much grinding, you will in all probability make it worse. Old heads more often than not did benefit from a bit of
DIY but modern heads are so well developed and cast that unless you have tested various combinations of port shape etc on a flow bench the gains can
rapidly become losses. About the only worthwhile mods are matching the manifold to the head to avoid steps (don't forget to match the thick
gasket as well) and knife edge the casting between the pairs of inlet ports which does help a bit. Otherwise leave it to the experts.
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Shooter63
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| posted on 24/4/15 at 07:48 PM |
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quote:
Originally posted by Paul Turner
Indeed it is a strait fit and if its cheap enough and in good condition a useful upgrade.
But don't waste you time doing much grinding, you will in all probability make it worse. Old heads more often than not did benefit from a bit of
DIY but modern heads are so well developed and cast that unless you have tested various combinations of port shape etc on a flow bench the gains can
rapidly become losses. About the only worthwhile mods are matching the manifold to the head to avoid steps (don't forget to match the thick
gasket as well) and knife edge the casting between the pairs of inlet ports which does help a bit. Otherwise leave it to the experts.
As it happens I can gain use of a flow bench and back in the day I built race winning engines for a now international works team, all I needed to know
was if the head would fit, I have no experience of these type of engines, but as a great race engine builder once said " an engine doesn't
know who's name is on the rocker box"
That's for the info.
Shooter
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