mike lotus
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| posted on 19/10/09 at 08:14 AM |
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Engine management for RWD zetec conversion
Hello there i'm new to these sorts of forum and could do with a bit of help.
I am thinking changing from an old 1.6cvh carb engine to a 1.8 or 2.0 zetec.
I can do all the mechanical work and with some help connecting fuel lines etc.
As i'm doing this on a very restricted budget i have a couple of questions.
Would it be worth while changing to a 1.8 cvh carbed engine.
Or could i fit the zetec and use the factory ECU?
Is there some information on the forum how to use the standard ECU and connect it up to the existing wiring harness.
Any help / advice would be appreciated.
Thanks
Mike
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coozer
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| posted on 19/10/09 at 08:24 AM |
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Welcome Mike, interesting question there.
Does the cvh engine you have, have a coil pack? If so you can use the EEC unit from that.
Common route is bike carbs or twin webbers with Edis and Megajolt. The Ford EEC unit can used to control the sparks to save costs.
Zetecs will run fine (fixed 10° advance) with just the Edis.
The advantages of the zetec over the cvh will be smoother running, better economy and more power!
Theres a fair bit info on the net, one page of which which can be found HERE!
Where abouts are you and what you thinking of building??
Steve
[Edited on 19/10/09 by coozer]
1972 V8 Jago
1980 Z750
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whitestu
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| posted on 19/10/09 at 08:35 AM |
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quote:
Would it be worth while changing to a 1.8 cvh carbed engine.
Nope, the 1.6 is more tuneable than the 1.8 unless you are going to turbo it.
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Mave
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| posted on 19/10/09 at 08:45 AM |
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On pre-94 silvertop Zetecs it is perfectly possible to use the factory ECU and intake manifold (just make sure to route your steering shaft around
it). See my site for more info.
I believe that the post-94 Zetecs have an immobiliser build-in or something....
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hughpinder
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| posted on 19/10/09 at 08:56 AM |
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I believe big_wasa has had success using the standard ECU too, so it is possible
Regards
Hugh
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big_wasa
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| posted on 19/10/09 at 06:12 PM |
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I’ve just spent an hour doing a detailed reply and lost the lot 
yes you can use the standard ecu. I’ve been able to do up to an 1997 R reg mondeo ecu and loom.
Have a look at a couple of my vids
pre Pats
http://www.youtube.com/watch?v=Pxq4ks2Us_U
eec-v Pats
http://www.youtube.com/watch?v=oVXW1fWn-l0
There are two types of ecu.
The EEC_IV up to about 1995 (60pin)
The EEC_V 1995 on. (104 pin)
J K L had no immobilizer built into the ecu. Its easy to run but there hard to get because of this and the price of scrap last year and the scrapage
thing this year.
M N same as above but the ecu now had the Pats Immobilizer which is an Rdif chip in the key. Just an extra four wires as it turns out.
P R moved on to the EEC_V This has 104 pins. There is more inputs and the ecu also gained the Obd2 diagnostics
I am doing two of these at the min one for a local guy. We had it running last week. The engine struck up first turn of the key after being stood for
two years. I have a vid but haven’t asked if I can use it.
I will be hooking up the diagnostic port this week and running a scanner on it to check all the sensors are doing there thing. This one has about 65
hours in it with another 20 needed to see it finished.
Later Ecu's have extra security. As well as having the rdif chip in the key they also coupled the alarm to the ecu. It has a separate code. All
three must match up. This is to stop you going equipped with an ecu and chip and nicking a car. The alarm has inputs for doors and all sort as well as
the ecu having extra inputs. I’ve had a go at one put gave up as it was just to much work.
Not to help things. The wire colours and pin numbers change between cars i.e. the pin numbers and colours change depending on if its a Mondeo Focus
Fiesta.
If you can get a cheap ecu and loom its a cheap and easy way of running a zetec. With a 2.0 you will get 145bhp at the wheels if you have a good
exhaust and free flow filter and the ecu can be chipped for a little more. If all the sensors are good and wired as they should then you will have a
smooth engine with good economy and emissions with no mapping needed. You also get the Thatcham aproved Immobilizer on the latter ecu's.
If You need any help by al means drop me a u2u.
When I have finished the one I am doing for some one elts I will finish mine. It will be then for sale for the price of a megasquirt kit from the
states as I want to get into the programming side of it.
Its a separate hobby as I like wiring 
[Edited on 19/10/09 by big_wasa]
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big_wasa
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| posted on 19/10/09 at 06:14 PM |
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Tiger have done an eec_iv install on an Avon
Artical
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mike lotus
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| posted on 21/10/09 at 08:25 AM |
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Zetec engine management
Thanks for the help and advice.
I have to admit that i'm not building a sports / kit car but i am rebuilding an old reliant SS1  and want a bit more go.
I would love to build a locust etc but can't convince the misses to allow me to do it.
To be fair she doesn't even know about this one so i'm doing it out of the way.
Funds are also a bit tight as i've just been made redundant, that's why things are having to be done on a shoe string !!.
Mike
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