How hard is it to convert from carbys to a fuel injection system and what roughly would be the cost of doing it? I have been told efi would be better for the supercharger set up when it gets here. Im more concerned with reliability than pure perfromance.

_________________
1965 Riley Elf
1974 Ex Army Moke
1997 Rover Cooper
2002 JCW Cooper
2003 JCW Cooper S

Could you find a 4 cylinder car with efi and take all the injection gear off it. Put a trigger wheel on the crankshaft. Put a lambda sensor in the extractors. And plug it all together to make it go?

^^^ Nope. Not on a 5-port head. Do a search for 5 port fuel injection and you'll find lots about the charge robbing issue.

You can do it if:
1) You use a small injector in a position a long way up the manifold. It will have a wide pulse width and the charge may mix sufficiently (see Rover single point)

2) You do port injection and you make it sequential and you alter the pulse phasing to combat charge robbing (see Rover multi-point). Not many EFI computers will give you that functionality cheaply.

3) You inject upstream of a supercharger so you mix the charge.

M

Would it work the way i said with a 7 port head? and run itb's?

7 or 8 port head, no problem.
But, some heads are better than others...

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thats going to be the engine for my roundy, 7 or 8 port head with itb's and fast road/race spec.

I had a play with a new Amal carb the other day - not EFI, but a nice bit of gear

a mate is in to racing old bikes and he'd just bought a new one

_________________
did I tell you that I won a trophy?

Canems do a kit, but you'll need to be fairly handy with electrickery. They've been installed on A-series engines (one was featured in Practical Classics magazine on an A40 Farina). It would be an interesting project. Perhaps try asking the same question on the MiniForum.co.uk.

Youtube video of the Canems kit here.

ok so not quite as easy as just bolting a few new bits on it seems. Is EFI really that much better than a well set up carby? The kit comes with a 1 3/4 SU.

Thanks for the links angusdog

_________________
1965 Riley Elf
1974 Ex Army Moke
1997 Rover Cooper
2002 JCW Cooper
2003 JCW Cooper S

SPI had less HP than the carby model.
People in UK used to convert them to carbys to get more HP.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Could try hiflow or Link
http://www.hi-flow.com/HPSU2.htm
Link had a fuel injector throttle body at the Mini show bolted onto the end of one of their supercharger kits. Brian said he had a customer that had a Rover that wanted one of their supercharger kits and wanted to retain fuel injection.

Failing that have a look at VMAX scart website in the UK. He is running fuel injection as an option with the kits he is selling.

_________________
1970 Mini Deluxe - 1275, Weber, Clive 346 cam, MS 4-pot slotted discs, Megajolt ignition Now with new improved Mambas... almost on the road
1966 Van with Traveller rear seat conversion
2008 Prado GXL
All in various states of repair...

If I remember correctly the Practical Classics A40 used a Mini MPi intake manifold anyway?

People used to use Magna and Falcon SPi bits on all sorts of cars in the early 90's. BUt SPi is really just a fancy carb anyway. Better to stick with a 1 3/4" SU.

Cheers,

_________________
Brett Nicholson
Greendale (near Ballan) VIC.
1971 Morris Mini Moke
1966 Austin Mini
1965 Morris Mini Traveller
1973 LR Series 3 88
2007 LR Freelander 2

The primary motivation for moving from carb to (SPI) EFI was for emissions control, not power -- you basically couldn't meet the unburnt hydrocarbon, oxides of nitrogen and carbon monoxide emissions regs with a carb. Better power didn't come until they went multi-point.

_________________
Simon

The adventures of an owner builder in the Tallarook Ranges

The HP difference from SPi to MPi is 1 hp, though the MPi has a little more torque. the real advantage to using efi for a supercharger would be the ability to change the fuel air mixture on the fly as far as I can tell with the O2 sensor giving real time data to the ecu.

Rover efi with Klas's mini squirt ecu can do the job, would cost in the region of $2k to do.

_________________
Noli Illegitimi Carborundum

Stick with a carby - its much cheaper to set up and can be tuned by a greater number of people. EFI on a 5 porter is very complex - the $$'s required would be better spent on other improvements such as a crossflow 7/8 port head

Daniel

_________________
Videos - Turbocharged A-Series on Dyno & at Wakefield
Mafs waz not my strong subgeckt at skkol