9 replies to this topic

[tmsmini]

I know the MPi already has crank sensor, but I am looking to use it in a non-Rover MEMS application.
It seems like the pulley could be modified and the sensor mounted/welded to the timing cover.
Has anyone done this? Pictures? Does someone sell a kit?

Terry

Edited by tmsmini, 09 July 2009 - 01:56 AM.

[tmsmini]

Looks like I just needed to search a little better:
http://trigger-wheel.../en-uk/d16.html

I thought mounting the sensor in that position would intrfere with the tensioner.

So is I'm guessing that if the first one will work, others from KAD and Specialist Components can be made to work on an MPi also. I remember somewhere someone mentioning that a wheel held only by the crank bolt was not the best due to a tendency to move. The last picture shows a drilled hole for a roll pin, what does the roll pin slip into on the other end?

Edited by tmsmini, 09 July 2009 - 01:43 PM.

[Sprocket]

I have no idea why they did that in the way they did, well, i do hava an idea, but its no so much harder to do it better.

I machined the outer section of the MPi pully to take one of thier 4" center universal wheels. I made sure that only enough metal was removed from the pulley so that the trigger wheel sat proud 0.5mm. I then drilled and tapped four holes 9 teeth apart each and fitted M5 low head cap head screws. Positioning of the gap was much the same as described in there guide, but you only need to tighten down the four screws, and I recomend the use of locktite too.

Im not sure how you can use a locktab when there is no posative location onto the trigger wheel, fine if the trigger wheel is doweled to the pulley but the locktab is not located on the trigger wheel. That bolt WILL work loose, more so with the reduced thread engagement of the original bolt. They only say use a longer bolt if apropriate, they should be demanding that the bolt is longer!

The only reason I think they made this kit in the way they did, is that is a 'bolt on' affair. I would strongly recommend that you remove the pulley and have it machined, after all, its nearly off anyway. The only thing with that is finding some one to do the machining and that takes time. Im sure for the £20 of the universal 4" center wheel that the machining of the pulley wont be much more than £20, which is much the same price as the engine specific wheel they sell.

Do not forget that the MPI trigger pattern is specific to Rover, it is not just 1 missing tooth, its four and they are not equaly spaced. You need to be sure you know exactly how to set it up!!

Sprocket, a man with experience in this field

[tmsmini]

Is there enough meat on the ribbed pulley to machine?
The lip next to the belt is pretty thin. Does anyone have a photo of a finished MPi pulley?

Terry

[tmsmini]

Vendor response on movement of trigger wheel:

If you are using a dowel then it should be a really good tight interference fit. A roll pin is a far better way to do it as the sprung nature of a roll pin means that it "wants" to stay put. You can even drill+tap for a small bolt/set-screw if you wish, with the addition of some threadlock that really wouldn't be going anywhere.
Fundamentally it's a case of belt and braces - many customers ignore our advice and don't use any secondary fastening methods at all but don't have any problems.

[Dylan8660]

What's the purpose of this modification? Is it so you can use a lighter flywheel and or different clutch?

[tmsmini]

The plan is to use an MPi block with carbs in a 64 Traveller. I have acquired a spare engine and many other spares for the MPi block. If I do this then the engines and ancillaries in both our cars would be the same and i would have a complete set of spares for either car. Eventually I may inject the transplant. I am taking it one step at a time. Getting the block to fit with the alternator in the standard MPi mounting location is one issue. Using the engine with carbs at first just means I can do it in stages.

The vendor did not address the loosening of the bolt. Even if you have the wheel and pulley locked with a roll pin, what can you lock a lock tab to as Sprocket mentioned above?

Terry

Edited by tmsmini, 31 July 2009 - 07:14 PM.

[Dylan8660]

Can you not use the existing reluctor ring and sensor from the mpi flywheel? only asking because you've lit a spark in my mind about getting a lightened flywheel on mine.

[tmsmini]

Most other ECUs use a 36-1 pattern wheel for fuel and ignition control. Initially I will just use ignition control like Megajolt. Megasquirt may be able to use the Rover pattern and perhaps UMS for both.

[tmsmini]

Any issues with a dampener pulley? I thought I read on one of the othr sights that they could cause problems with the trigger wheel attahed to the outside portion.

One you attach it, does it need to be rebalanced?

Terry