The cam timing would just need setting in the normal way - as long as there
was sufficient adjustment in the system (either by setting an adjustable
pulley, or the tensioner taking up the slack) the belt should be long
enough. My memory fails me, but I think you'll have a sprung tensioner. A
vernier shouldn't be needed on a zetec because the pulleys aren't keyed on
IIRC.
Martin
----- Original Message -----
From: "Ian Harrison" <[email protected]>
To: <[email protected]>
Sent: Saturday, January 14, 2012 10:54 PM
Subject: Re: [Quantum Owners] Xtreme Zetec Turbo
Stupid question, but if you use a decompression plate will it affect the cam
timing by putting extra length between the crank and the cam pulleys?
Would you need adjustable pulleys to correct it?
On 14 Jan 2012, at 20:20, Jim Hearne <[email protected]> wrote:
The head gasket was a Focus RS gasket, these are multipart steel shim type
gaskets and good for lots of power, also available in several thickness.
I had problems on my ZVH with Felpro gaskets failing between cylinders
about once a year, change the the Focus RS one and no problems since.
Jim
On 14/01/2012 13:55, Matthew Wastell wrote:
Hi,
Honestly I've no idea about what is the best material. I saw an article
in some kit car about a tiger with a decomp plate and tracked the guy
down. Asked him what he did and then did the same basically.
Ferriday aluminium decomp plate with one later metal head gasket on the
block side and a bit of blue hylamar on the head side.
This was actually planned to do this way but we did a full forged piston
route instead. That don't last and the decomp plate was an emergency plan
Along with a 100k+ auto mondeo Zyrtec engine, (I had the decomp sat on a
shelf already and the complete mondy was almost free) to get me to
Ireland in time for the owners trip.
Supposedly standard valve springs are good for one bar max boost so
unless you change them 2.5mm is no trouble. I'm over boosting to 1.1 bar
before the controller brings it back to .9 with no issues so far (apart
from keeping it in a straight line)
So I can only say aluminium worked for me for around 10k of punishing
miles.
Matthew
On 14 Jan 2012, at 09:27, nigelp<[email protected]> wrote:
The engine's coming out for gearbox overhaul, new clutch and drilling
the oil return for the turbo into the block, probably like Jim's ZVH
conversion. Manged to win a bid for a Garrett turbo from an SX200
last night and have started laying out the manifold plate on CAD and
will then CNC machine the plate at work.. Question is I need to get a
blanking plate to lower the compression on the head. Does anyone know
if the profile is the same for silver top and black top 2L engines?
I am going the decompression plate route, certainly for this initial
stage, I haven't yet run the calcs on plate thickness required, buit I
notice a web site where someone has used 2.5mm and I think Matthew
said his was 2 mm ah just checked Matthews was 2.5mm, so may as well
do the same. Anyone any idea what material is best for the plate, I
notice Ferriday use aluminium and another company I talked to at the
Autosport show yesterday used stainless. I can see arguments for and
against both, so Matthew do you remember what material yours was?
Thanks, Nigel
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IMPORTANT NOTE: All information presented herewith is provided on an "As Is"
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