One Carb Or Two?
Posted 06 January 2016 - 09:06 PM
What would it take to convert from injection to carb on a 1994 1.3i Mayfair...?
All I can think of is...
Inlet manifold (MG Metro...?)
Exhaust manifold (MG Metro....?)
Carburettor (MG Metro....?)
Dizzy (Metro electronic instead of points)
Anything else... is it as simple as swapping the above and fire up and drive away....?
I understan the ECU would be removed etc... and probably change wiring loom for non injection loom...?
Uncle Cooperman, Voted Mr TMF 2011
Posted 06 January 2016 - 09:27 PM
You don't need to change the wiring loom. All the basic wiring remains the same. The differences come with the ECU connections which are no longer required. You'll need to fit new wiring for the distributor and that's about all (I'm sure I've forgotten something, but it won't be very important).
I did an SPI to twin HS4 conversion a couple of years back and it was very simple.
Up Into Fourth
Posted 06 January 2016 - 09:48 PM
what about fuel pump doesnt the injection pump flow to much psi for the carb!!!!
Up Into Fourth
Posted 06 January 2016 - 10:04 PM
Yup way too much, you need a regulator.what about fuel pump doesnt the injection pump flow to much psi for the carb!!!!
One Carb Or Two?
Posted 06 January 2016 - 10:26 PM
So is it worth doing then....?
I only ask as I have a fault on mine, Im not used to playing with mini's that have an injection manifold and more used to carbs... I much prefer carbs... on mini's...
I know that the injection system is there for the emmisions etc... but when you find a friendly garage they tend to be OK with conversions and are sympathetic to the cause... ;)
Up Into Fourth
Posted 06 January 2016 - 10:53 PM
I'm the TMF Mini Doc for injection cars.... Carbs.. Pah!
Moved Into The Garage
Mini Mad
Posted 07 January 2016 - 07:28 AM
when i did mine it was reccomended that i didnt use a reg, i went back to a std tank with facet pump
Up Into Fourth
Posted 07 January 2016 - 12:22 PM
id try and stick with the spi
a carb on it looks scuffy with all the extra wires about and will devalue it
One Carb Or Two?
Posted 07 January 2016 - 05:34 PM
You're asking the wrong person
FS
OK tell me this....
Mine seems to bog down at around 3500 RPM and stays like that until going through to 4500 RPM... it seems to struggle in that rev range...
Also
I had a look around the engine bay a couple of weeks ago and found a vac pipe that wasn't attached to anything...
I found (with help on here) that it goes to the MAP sensor black plastic box thingy...
It would tickover no problem but didnt want to rev with this attached...
When disconnected it revs fine until around 4000 RPM and doesn't seem to want to go past that without a struggle...
It passed its MoT without much problems except for 2 advisories which will be addressed for the next time... (usual rust and oil leak)
My theory is that something is faulty within the ECUI/Injector system hence why I want to go to carbs....
One Carb Or Two?
Posted 07 January 2016 - 09:02 PM
Crazy About Mini's
Posted 07 January 2016 - 09:46 PM
Uncle Cooperman, Voted Mr TMF 2011
Posted 07 January 2016 - 09:53 PM
When I did this I fitted twin HS4 carbs, a fully gas-flowed head with 35.6/29.5 valves and 10.2:1 c.r., a 266 cam, LCB, Maniflow twin box centre-exit exhaust, lightened pre-Verto flywheel, Aldon 'yellow dizzy and a FACIT fuel pump with a pressure regulator.
it drives very well and, for an old classic car, is quite brisk on the road.
Mini Mad
Posted 07 January 2016 - 09:59 PM
You're asking the wrong person
FSOK tell me this....
Mine seems to bog down at around 3500 RPM and stays like that until going through to 4500 RPM... it seems to struggle in that rev range...
Also
I had a look around the engine bay a couple of weeks ago and found a vac pipe that wasn't attached to anything...
I found (with help on here) that it goes to the MAP sensor black plastic box thingy...
It would tickover no problem but didnt want to rev with this attached...
When disconnected it revs fine until around 4000 RPM and doesn't seem to want to go past that without a struggle...
It passed its MoT without much problems except for 2 advisories which will be addressed for the next time... (usual rust and oil leak)
My theory is that something is faulty within the ECUI/Injector system hence why I want to go to carbs....
when you speak about the vac pipe thats connected to the black box, where is it going to and from? the little tiny black vac pipes should go, ECU - little black box (fuel trap) - inlet manifold. i think.
One Carb Or Two?
Posted 07 January 2016 - 10:23 PM
Thats the problem...
If I connect from rear of inlet - little black box - ECU it dont like it...
If I connect from inlet direct to ECU - effectively bypassing the box - it dont like it...
If I disconnect the vac pipe from ECU or inlet - it runs fine upto around 4000RPM....
Maybe if I attampt a TB reset it might cure it - maybe... as thats the only thing I havent tried yet.... all vac pipes and any elbows have been replaced with new...
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