ausmini :: View topic - Fuel injection

ausmini https://www.ausmini.com/forums/

Fuel injection https://www.ausmini.com/forums/viewtopic.php?f=2&t=813	Page 1 of 2

Author:	Stillson [ Wed Jun 09, 2004 5:24 pm ]
Post subject:	Fuel injection
Hey all, I am not sure if I am barking up the wrong tree, or it this has been done before, but I was wondering if anyone has ventured into putting a fuel injection kit onto there Minis. What sort of drama do you think there would be, and if anyone has do they know who to get in touch with because I would like to give it a go. TA.

Author:	thommo09 [ Wed Jun 09, 2004 5:41 pm ]
Post subject:
Pommie minis from the late 80's/early 90's onwards had fuel injection. you could get the bits from one of these and give it a go maybe? i think the first injected minis were single point and then later on multi-oint injected.

Author:	supercharged 850 [ Thu Jun 10, 2004 12:58 am ]
Post subject:
thommo09 is right.... You'll be getting yourself into many problems if you try to tackle the setup from scratch..... Your BEST bet would be to buy a wrecked front cut of an injected 1275 from england/japan. This way you will have the necessary wiring, computers, brake upgrade, and low KM engine - all of which should work first time when installed into your car... it beats wasting money on designing and tuning your own setup....

Author:	thommo09 [ Thu Jun 10, 2004 11:21 am ]
Post subject:
i could be wrong, but isn't it easier/cheaper to get more power from a carb mini engine anyway?

Author:	poeee [ Thu Jun 10, 2004 1:09 pm ]
Post subject:
thommo09 wrote: i could be wrong, but isn't it easier/cheaper to get more power from a carb mini engine anyway? You are correct. Injection isn't worth the hassle on an A series.

Author:	bnicho [ Thu Jun 10, 2004 1:17 pm ]
Post subject:
A mate of mine has done this swap. He bought a front cut of a 1998 Cooper from a Mini specialist and swapped it all into a UK MkIII shell. So he now has an EFI 1275, air con, wood dash, air bag, front disks etc. He also fitted KAD rear disks, Barina Seats, cruise control, and central locking. So far he has done 30,000km without trouble. It looks like a MkI Cooper S but drives like a modern car and has all the mod cons. He reckons it's the best of both worlds Pluses as I see it: - easy starting and smooth running - EFI copes with MILD mods without adjustment (eg: filters, exhaust, small cam or rocker changes). - low miles so no rebuild required. - modern conveniences - air con. Minuses as I see it: - complex injection setup could be troublesome to diagnose, especially at the side of the road! - parts unique to EFI difficult to get and may be expensive or impossible in future. - anything more than mild mods requires reprogramming or aftermaket computer. - very cramped engine bay! Conclusion - I'd rather have carbs and elect ign! Air Con can still be fitted.

Author:	Mini Smeg [ Thu Jun 10, 2004 1:19 pm ]
Post subject:
Stillson you just cant be happy with your 998 can you. There is a lot 998 people out there you wont be the only one Some even have an 850 so feel sorry for them not yourself

Author:	sweep77 [ Thu Jun 10, 2004 1:40 pm ]
Post subject:
why would a carb on a mini give more power than fuel injection? Wouldn't fuel injection be more fuel effecient, better emissions, more power etc? If you got an aftermarket system like haltech with a 45 weber manifold and 45mm throttle body i'm sure there would be no hassle in getting this to work would there? At least this way you can reprogramme it when necessary. cheers ash

Author:	bnicho [ Thu Jun 10, 2004 1:55 pm ]
Post subject:
Have a look at the following link if you really want to give it a go. http://www.planet.eon.net/~chichm/efi/efi.htm Unfortunately he could not get it working with the standard head and went to an 8 port. Believe me, he knows his EFI too!

Author:	drmini in aust [ Thu Jun 10, 2004 3:00 pm ]
Post subject:
Problem with port injection on a Mini is getting the 2 injectors to fire at the right time to feed each of 4 cylinders. Flow thru each intake port is not symmetrical- each pair of cylinders take a drag each off the port then have a rest while the other 2 do likewise on the other port. IF the A series had 4 inlet ports like 99.5% of cars these days, there would be no problemo... With a 5 port head, carbs appear to be the #1 way to get power.

Author:	kazjim [ Thu Jun 10, 2004 8:16 pm ]
Post subject:
I have an image in my head of how it MAY work.... I've been talking to an electrical engineer at Adaptronic (EFI) and we MAY have a solution.... Think about each inlet port having two trumpets with a shared Throttle plate, and the injector "Upstream" of the throttle plate... Each trumpet is in line with the inlet valve it will be servicing...... Now, with Modern Efi Setups, you have TOTAL control over each injector, so it doesnt have to be "constant flow" like the old type ..... THe biggest barrier to power seems to be the atomisation of the fuel - injectors seem to make the droplets too small and you loose some torque and max HP ..... I'll do some sketches one day and see if they work..... anyone got a "section Drawing" of an A-Series head (Say, a 12G940 ?) Cheers J

Author:	drmini in aust [ Thu Jun 10, 2004 8:20 pm ]
Post subject:
Nah- you got a few spare 940 heads, I'll put that stuffed one in the saw for you... Bloody pushrods are the problem- otherwise we could just divide the port down the middle like Waggott did with `red' holden 6 heads..

Author:	kazjim [ Thu Jun 10, 2004 8:35 pm ]
Post subject:
yea, thought about brazing a small divider in there, but the port diameter is just not enough.......in a forced induction setup, you could probably get away with the maximum port diameter and a brazed divider, but N/A... nahhhh.... Are there any other siamesed port heads out there ? (i think Ford had one, didnt they ?) J

Author:	sweep77 [ Thu Jun 10, 2004 8:45 pm ]
Post subject:
What about instead of using 2 injectors for each intake, why not use 2 injectors per intake? Then they can each be timed for the intake stroke and use normal programing. that way one injector isn't doing the work of two and the ecu does its normal thing. Just a thought. cheers ash

Author:	kazjim [ Thu Jun 10, 2004 8:48 pm ]
Post subject:
"Think about each inlet port having two trumpets with a shared Throttle plate, and the injector "Upstream" of the throttle plate... " Not the clearest, but this is what i was alluding to ........ J

Page 1 of 2	All times are UTC + 10 hours
Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/