1.8 Cylinder head

[Bracpan]

I am looking for an expert/advice on the 1.8 Cylinder head.
I have just manged to get hold of a spare head so I can get it machined and ready for a quick swap for my standard head. I want it modified for unleaded and while its here upgraded ready to run twin SU's and hopefully better exhaust, cam etc.
My engine and the replacement head are both the low compression versions and i was thinking of raising the C/R to around 9.5 to 1 and i've heard fitting slightly larger inlets helps it breath a bit better... ( from the 2ltre) but heard the stems are thinner. so probably needs new bronze guides and drill them out ?
Deck height it slightly over 88mm so have a bit to play with.
I also live close to a very good machinist who has done some great work for me in the past.
Any advice appreciated.

[classicswede]

I convert to B20 valves using K liners

If fitting hardened seats only do the exhaust. On some B18 doing the inlet will break into the water ways

[Bracpan]

Hi
Many thanks Dai we have spoken before and I bought all my suspension kit off you. Can I email you for more details i have a few questions and would be more than happy to get the parts from you.
Cheers
Phil

[classicswede]

as always any time

[Bracpan]

I convert to B20 valves using K liners

If fitting hardened seats only do the exhaust. On some B18 doing the inlet will break into the water ways

What are K liners the valve guides, where are these available ?

[Bracpan]

I emailed KG Trimning and they came back to me with all the listed parts needed to put bigger inlets in the 1800 head... :teeth_smile:

[blueosprey90]

Just throwing these out there for bedtime reading.

I'm running a B16 and one of these days I plan to look at the head to see if I might improve it some. I've saved these links for future reference. :regular_smile:


https://grassrootsmotorsports.com/articles/grm-vault-diy-head-porting/?utm_source=ActiveCampaign&utm_medium=email&utm_content=Tech+Tips%3A+Ford+Focus+RS&utm_campaign=GRMWeekly


http://www.diyporting.com/thread.html

[Bracpan]

Its useful stuff to read appreciate that, i also have a few books by David Vizard, although he covers mostly Mini heads the chamber design is very simular.
i have a second hand head stripped so can work on that in my own time and order stuff ready...

[Vintagewrench]

Its useful stuff to read appreciate that, i also have a few books by David Vizard, although he covers mostly Mini heads the chamber design is very simular.
i have a second hand head stripped so can work on that in my own time and order stuff ready...

Visard's most recent book on porting covers mostly US built heads and is well worth purchasing.

https://books.google.com/books/about/David_Vizard_s_How_to_Port_and_Flow_Test.html?id=K AdDhXNozSsC

K Liners are about .030 thick bronze guide liners. I've used them in the shop for years and they work very well and are long lasting.

http://www.sbintl.com/KLine.html