_________________
Daily isn't so Special. And it makes me sad.
Need space and time and I'll crack on with Jams si!

Catch me on Facebook as I'm rarely on here.

sorry guys have to agree with sisisisi as i have built a 2.0 zetec turbo with ferriday de-comp plate and when researching found this

http://www.ferriday.co.uk/cnc/decompres ... ates.shtml

which states

When using a Decompression Plate - only one head gasket must be used. All that is needed to seal the plate is a thin smear of high temperature non-setting sealant around the water & oil galleries between the 2 metal surfaces only. Let the conventional head gasket do its job in exactly the same way, as if the spacer plate wasn’t there. Don’t forget that with OHC engines it may be necessary to use a vernier pulley to allow correct cam timing settings. It is not necessary to anneal a decomp plate.


two headgaskets creates two weak points because the head torque setting are altered to an unknown quantity because of the squashable nature of the gaskets and lowers the compression ratio further than expected.


Cheers

Andy

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_________________
RIP Ben. Gone but not forgotten.

SportKA - I've driven one and its deffinately a Girls car

Ford Fair 2010 0-60 7.45 secs Trek 4100

Save the trees, wipe your arse with a Cosworth

after all this crap I might just do my ZT properly

_________________
Daily isn't so Special. And it makes me sad.
Need space and time and I'll crack on with Jams si!

Catch me on Facebook as I'm rarely on here.

Buy Terrys bottom end!

_________________
RIP Ben. Gone but not forgotten.

SportKA - I've driven one and its deffinately a Girls car

Ford Fair 2010 0-60 7.45 secs Trek 4100

Save the trees, wipe your arse with a Cosworth

_________________
Daily isn't so Special. And it makes me sad.
Need space and time and I'll crack on with Jams si!

Catch me on Facebook as I'm rarely on here.

Think he mentioned to me thats he may be selling the head to someone!

Although you said you wanted to keep it 1800 and his engine is 2l!

_________________
RIP Ben. Gone but not forgotten.

SportKA - I've driven one and its deffinately a Girls car

Ford Fair 2010 0-60 7.45 secs Trek 4100

Save the trees, wipe your arse with a Cosworth

_________________
Daily isn't so Special. And it makes me sad.
Need space and time and I'll crack on with Jams si!

Catch me on Facebook as I'm rarely on here.

lol good choice. i had the decomp plate but never really trusted it, no real reason why. but changed to forged low comp pistons and 2.1 for peace of mind and because i want around 400bhp in the next stage of tune

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What happened to the heart of it allways being a RS1800!

_________________
RIP Ben. Gone but not forgotten.

SportKA - I've driven one and its deffinately a Girls car

Ford Fair 2010 0-60 7.45 secs Trek 4100

Save the trees, wipe your arse with a Cosworth

_________________
Daily isn't so Special. And it makes me sad.
Need space and time and I'll crack on with Jams si!

Catch me on Facebook as I'm rarely on here.

or because i have everything but the ecu and injectors... i could just do the 1.8 to start with on decomp and see what happens. goes tits up i can do it proper

_________________
Daily isn't so Special. And it makes me sad.
Need space and time and I'll crack on with Jams si!

Catch me on Facebook as I'm rarely on here.

_________________
Daily isn't so Special. And it makes me sad.
Need space and time and I'll crack on with Jams si!

Catch me on Facebook as I'm rarely on here.

_________________
Daily isn't so Special. And it makes me sad.
Need space and time and I'll crack on with Jams si!

Catch me on Facebook as I'm rarely on here.

IF you have to use one ( which to be honest i wouldnt as you loose alot of the "squish " area in the combustion chamber ) one headgasket is the way they were original designed to be used. The block should be decked and the decomp plate fitted to that with a sealant of a type, then the headgasket fitted to the head side.

the cheaper way to do it is 2 headgaskets, but remember thats going to lower the CR even more and you are going to loose even more of the squish ability of the head leading to a less efficent burn

HTH