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  #1  
Old December 11th, 2005, 11:34 AM
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Dennis Newman
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Megasquirt with 4.0

I thought I would start a new thread on this as most the information is posted anecdotally in several other threads. The 94 I have owned now for almost 2 months (however can't seem to get shipped from MI to CO) has the beginnings of a 4.0 conversion however it is missing the MAF and some other pieces. I would really like to do the megasquirt conversion and it seems like this truck is the perfect candidate.
Has anyone successfully got it working on a 4.0 without a distributor? Mike I see you have toyed with it some, how did you get your 4.0 running?
Looks like the way to get it to work requires a 96 Disco flywheel with the pickups? Where can you find those?
My goal would be the megasquirt2 system, with the Ford ignition pack modules and no distributor.
Any thoughts anyone?
Thanks
Dennis

I forgot one last question, has anyone figured out how to get the check engine light to work? My guess is the emissions folks would probably miss this but I would like to have that working as well. I have just signed up on the msefi.com forums site but from my initial review there isn't much on the 4.0 rover.
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  #2  
Old December 11th, 2005, 12:35 PM
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Hans Haase
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Without a distrubutor may be a bit of an issue, as you will also require spark control in that case. When Mike and I were discussing it originally, the MS-II system was not out yet, which does integrate with ignition systems.

Another option would be to use the hybrid style timing cover that uses the rotor style pump and serpentine belts, but also does mount a distributor on a 4.0 or 4.6.

I've thought about the 'check engine' light as well. Maybe come up with a quickie little circuit board that turns the light on for a couple seconds when you first turn the truck on, then it shuts off.

-Hans
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Old December 11th, 2005, 01:10 PM
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Matt Hurst
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Quote:
Originally Posted by Hans
Another option would be to use the hybrid style timing cover that uses the rotor style pump and serpentine belts, but also does mount a distributor on a 4.0 or 4.6.


-Hans
which water pump is used with this timing cover?is it the same as the 3.9s
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  #4  
Old December 12th, 2005, 10:26 PM
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Jason Herring
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It would be pretty easy to make a circuit for the 'check engine' light - maybe Megasquirt v2.1 might include it if we asked nicely. Also interesting would be to get the check engine light to come on if the ECU detects a fault -- to make this basically fully 'compliant' (and fully emissions-test-station stealthy).
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Old December 13th, 2005, 10:07 AM
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I ended up using a 95 timming cover off a disco. If I had the right flywheel I most likly would be running the MS they way you want to. You might want to check out the outerlimits4x4 forum, there is a couple Rover guys running MS on 3.9s that could give you the basic maps to get ya started.

I forget where but I remember someone in the UK has MS running with the coilpacks on I think a 3.9. I saw pics of the truck in deep water (up to the windsheild) and it was running!

Quote:
Originally Posted by mattdh
which water pump is used with this timing cover?is it the same as the 3.9s
It uses the same water pump as the 4.0, it also uses a 4.0 Alt, AC and serp belt so it is a little more then just changing the front cover if you are starting with the 3.9. But the oil pump is better and haveing 1 belt for verything that goes on and off in 2 seconds is sooo much nicer!
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  #6  
Old December 13th, 2005, 11:50 AM
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Chris Davis
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I am a fan of the V belts--it allows better diagnostics as well as adding accessories. I am not sure I could do the York air compressor with a serp belt--I don't think it would physicially fit.
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Old December 13th, 2005, 02:15 PM
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I think it would fit, at least without AC there is a big spot to add it!
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Old December 14th, 2005, 09:44 AM
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Chris Davis
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It is not the 'spot' that is the trouble, Mike, it is the distance of the compressor once it hits the head/engine block and how far out the pulley is--I completely maxed out (or min-ed out depending on how you look at it) the position of this pulley to align it properly. The Serp belt, in comparison to the A/C belt on the V-belt set up is further back toward the engine, I believe, by about 1/2". The problem is that I have the back face of the york as far back as it will go and it 'just' aligns on the v-belt--I can't move it the 1/2" further back for the serp (hits the head/block). I might be wrong about this, but we quickly looked one cold night after a Solihull meeting on a 97 D90.

Cheers,
Chris
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