On the silver top Zetec the CVH pulley fits straight on, just needing a
spacer to align it with the alternator.
Jim
On 08/05/2020 23:44, 'JR' via Quantum Owners Group wrote:
Thanks for the info Jim. Sounds like V belt drive is worthy exploring.
What did you do for crankshaft pulley?
John
On Friday, 8 May 2020 10:23:50 UTC+1, Jim Hearne wrote:
I would think the 1mm clearance on the gearbox end is because the
engine and gearbox has been moved across that way to give enough
clearance on the crank pulleys and belts.
The Zetec cylinder blocks are the same width as the CVH, it's just
them having flat belts for the auxiliarys instead of V belts that
causes the clearance issues.
In the 2+2 you can modify the steel frame rails, the saloon isn't
so easy.
With the silver top Zetec in my saloon i converted the alternator
to V belts and replaced the water pump with an electric one.
That let me keep the engine and gearbox in the same place as a CVH
The ST170 6 speed gearbox is actually narrower then the BC/IB5 so
it would let you move the engine/gearbox across to the gearbox side.
But, it uses unique driveshaft joints on the inner end so you
would need to get custom shafts made.
It is also hydraulic clutch and cable gearchange so a lot of work.
Jim
On 07/05/2020 20:34, 'JR' via Quantum Owners Group wrote:
1mm clearance sounds super tight! - you must have some really
good engine mounts to stop that hitting. Do you have a 6 speed
box or BC/IB5? Front or rear starter motor? On my cvh + BC 5 spd
there is better clearance than 1mm on gearbox end. Maybe fiitting
a zetec blacktop needs the whole of the power unit moving
slightly towards nearside to make it fit?
With regards induction I will be using a cvh efi./turbo up and
over alloy inlet manifold with some adapter plates (single
throttle body) - this should make it easier to move to turbo
later once the basic conversion has been sorted. Had a re-read of
nickp;s thread - thanks for reminder.
John
On Thursday, May 7, 2020 at 10:37:53 AM UTC+1, russ price wrote:
In that case it is the same size as the ST engine fitted in
mine. I didn't do the conversion but i had to change the
engine so have some idea of how it's done. The clearance at
the crankpulley end is quite tight but it is possible without
cutting anything, clearance at the gearbox end is even worse
1mm only. I'll take and post some pics later, The exhaust has
had some work done to squeeze it in. The biggest problem
however is on the induction side i don't see how it would be
possible to use the original system, mine is running on bike
carbs and that still a bit of a squeeze. Engine mounts need
to be pretty firm and a head steady is a good idea. Just
realised the topic started by the chap who did the conversion
is still on proboards forum take a look at ST170 Saloon
posted by nickp.
Russ
On Tuesday, May 5, 2020 at 3:41:57 PM UTC+1, JR wrote:
Looking to replace my saloon cvh lump with a 2 litre
zetec blacktop motor. Anyone have any experience of
this... tips.problems . pointers etc?
Most of the info I have found relates to using the old
silvertop zetec engine - I won'r be using one of those
(too old/rare/expensive in comparison to plentiful cheap
blacktops)
I don't see any problems with manifolds, loom, injection,
ecu etc. (I will be using aftermarket ecu/efi)
Biggest problem I see is very tight fit/access in engine
bay at crank pulley/cambelt end. Ideally I do not want to
be cutting inner panel.
John
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