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Fuel injected Minis
https://www.ausmini.com/forums/viewtopic.php?f=5&t=1494		 Page 1 of 2
Author:  jill200sx [ Wed Aug 11, 2004 4:50 pm ]
Post subject:  Fuel injected Minis
I did a search but didnt come up with a lot.
Can you guys tell me.. how hard is it to fuel inject the 1275 motor.
Does it involve running a puter, I'm gessing it must.
Can you bolt on a fuel injected top end? and what other mods need doing? anyone done it (other than that gorgeous 10k head job red brick I saw on Autospeed)

Jill
not looking forward to a carby again
Author:  drmini in aust [ Wed Aug 11, 2004 5:16 pm ]
Post subject: 
Fuel injection was put on UK Minis to help them pass emission laws. The use of injection on siamese port Mini engines is not a great leap forward, apart from emissions- nobody has yet made it really work like it should.

Many people in UK have converted their early injected Minis back to SU carb.
There is more power available and less hassle.
Author:  bnicho [ Wed Aug 11, 2004 5:37 pm ]
Post subject: 
If you really want EFI you are better off getting a complete ex-Japan front cut and putting it all into your shell. That way you get the loom, all the sensors etc and you can have A/C as well. 8)

As the doc says - on a Mini it was more for emissions than power. Stock Mk1 Cooper S - 76hp at the flywheel. Stock 1998 Rover Cooper - 63hp at the flywheel. Enuf said!

You can hot up the EFI Minis. But the Rover computer is not easy to reprogram if you modify the engine and aftermarket EFI does not work with the A series very well.
:(

EDIT: You can't just use the EFI top end - camshaft, flywheel and housing, and various other bits have to be changed as well to incorporate the sensors.
Author:  mickmini [ Wed Aug 11, 2004 6:22 pm ]
Post subject: 
I found a great site by a guy in canada who tried to do it all himself, and ended up giving in and trying an 8 port head to make it easier. i'll find it when i get home and post it.
Author:  sweep77 [ Wed Aug 11, 2004 6:23 pm ]
Post subject: 
i think the doc has posted this before but here it is again. interesting read:
http://www.planet.eon.net/~chichm/efi/efi.htm
Author:  mickmini [ Wed Aug 11, 2004 9:00 pm ]
Post subject: 
yep that's it

here is his home page with other interesting stuff

http://www.telusplanet.net/~chichm/
Author:  supercharged 850 [ Thu Aug 12, 2004 3:54 am ]
Post subject: 
...the best place for injectors would be the spark plug holes.... but that would create a small problem.... no spark, mister!!!!

I'm kinda suprised there isnt a proper mini head on the market with a quad injector setup... after all those years....
Author:  min13k [ Thu Aug 12, 2004 7:03 am ]
Post subject: 
there are but they cost 3500 plus
makka
Author:  Anto [ Thu Aug 12, 2004 1:27 pm ]
Post subject: 
Apart from using a Rover MPI motor the only 'easy' way to achieve successful fuel injection is with a cross flow head, so you get one injector per cylinder (that is the conclusion that Canadian bloke came to). I'd be thinking SPI is a bit different as it is just one injector for all cylinders.... but then it is more like an electronically controlled carb really, not worth doing.

If you really want fuel injection (ie not content with a weber ;) ) then transplanting an MPi motor out of a Rover would be far easier in the long term... unless you like to fiddle.

Anto.
Author:  9YaTaH [ Thu Aug 12, 2004 11:07 pm ]
Post subject:  Battered Saab
supercharged 850 wrote:
...the best place for injectors would be the spark plug holes.... but that would create a small problem.... no spark, mister!!!!

I'm kinda suprised there isnt a proper mini head on the market with a quad injector setup... after all those years....


Saab came up with a combination injector/sparker a while back......that would work! :wink: :shock:
Author:  supercharged 850 [ Fri Aug 13, 2004 2:06 am ]
Post subject: 
if i wanted injection, i would do an engine conversion at the same time - 2 birds with one stone.
Author:  supercharged 850 [ Fri Aug 13, 2004 4:44 am ]
Post subject: 
... I just found this pic of a mates injection setup on his ex-race mini.
It worked, but had its problems aswell...

Was a HALTECH injection setup on motorbike throttle bodies, with small generic air filters on a twin su inlet manifold.

Kinda nasty to look at.... but you get the idea...

Image
Author:  ausminis4u [ Fri Aug 13, 2004 10:59 am ]
Post subject: 
mini speed in the uk sell a spi injection kit for the mini. they are also developing a mpi manifold for the new JKD 16 v head :shock: mmmmmmm
Author:  drmini in aust [ Fri Aug 13, 2004 7:40 pm ]
Post subject: 
Before you get too excited, a Swift GTI motor with twin Webers instead of injection gives more power. Ditto the Vauxhall 2.0L motor.. :wink:
Author:  jill200sx [ Fri Aug 13, 2004 10:29 pm ]
Post subject: 
:?
ah

weber it is then :wink:

thanks guys, great info
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