32 replies to this topic

[mini-luke]

Worth noting you cannot ''remap'' in the sense of plugging a laptop in any SPI or MPI ECU, it's impossible. Only way to do it is to purchase an aftermarket ECU (Calver ST do one, around £550). It's worth reading the Calver articles on tuning an injection mini for some real world testing not my mate did it and it went well fast after.

http://www.minimania...information.htm

[phil242]

Hi,

Remap a SPI ECU is impossible. The design of the electronic inside board doesn't allow it.

For the MPI it's possible, because you have an external EPROM who can be removed, red, modified then fitted again with richer injection tables. The problem is that no engine tuner spend a single second on this subject ... Siemens's (if I remember good) ECU are not well known and it's too much work for an old MPI cars. Engine tuner prefers Bosch ECU for TDI motor, the money is the first reason :).

Cheers,

Phil

[jaydee]

The SPI Cooper ECU can handle about 100bph iirc, and thats what they're only allowed to use in mighty minis super class (and the spec is much hotter than what in stores sell as a stage 3 kit or so..) while the standard ECU is just poor. I've heard about tricks to remap it, but never seen it done so i cant comment on this.
MPIs all have the same ECU.

[phil242]

Hi, do you have the specs of such SPI modification ? Could be interesting to see what can be done.

Cheers,

Phil

[cliche]

Rebuilding my 94 Spi at the moment.
Here's a copy and paste of the engine and gearbox bits. I spent dozens of hours looking into this. Hope it is of use to you.

• New rocker studs & new head studs
• Duplex timing chain and gear
• 1330 cc
• SW5 camshaft
• Turbo head gasket
• "Stage 3" head (35/7mm inlet, 29mm exhaust valves)
• Polished crank,
• New big ends and bearings,
• P21253-60 x 4 pistons,
• Fully rebuilt gearbox with modified ratio for 10" wheels
• Centre oil pick-up, moly differential pin, helicoil sump plug
• Standard flywheel &
• Turbo clutch
• Raised c.r. to 10:1,
• MNE101070 Cooper E.C.U.

Am only aiming for 85bhp as the Spi injectors can't handle much more than that according to Sprocket (Spi TMF guru) and just after some fun, not speed

Edited by cliche, 15 September 2012 - 10:09 PM.

[mini-luke]

Presumably that's an SW5i cam?

[jaydee]

Hi, do you have the specs of such SPI modification ? Could be interesting to see what can be done.

Cheers,

Phil

Yep, tomorrow i'll look for the regulation book, its all written there

[cliche]

Presumably that's an SW5i cam?

yup

[cian]

In My personal opinion and personal experience i would sugest you throw the standard ecu away and get an sc one or similar as i did pretty much all of your mods to my mpi and made very little difference and never ran quite right but i recently got the sc 5 port fuel injection set up and it vastly increased both performance and general good running

[jaydee]

Hi, do you have the specs of such SPI modification ? Could be interesting to see what can be done.

Cheers,

Phil

PM sent!

[icklemini]

Hi, do you have the specs of such SPI modification ? Could be interesting to see what can be done.

Cheers,

Phil

I look after a few mighties: the supers have more modifications than the standards.

The regulations detailing all the modifications allowed in the series can be found on the website: www.mightyminis.co.uk :)

ttfn,
Dave

[phil242]

Hi,

Thanks you Jaydee for sending me the specs.

Cliche : I have rebuilt my 1275 with your specs, but 12755cc, kent 274i & a 1.5 lift ratio rocker.
I didn't have rolling-road it, but my feeling is that I need to give it more fuel. If you do compare the given power with a carb' engine, there is a few horses to bring back under the bonnet.

Icklemini : Did you have seen SPI car from the challenge ? If so, did you seen the specific SPI mods ?

Cheers,

Phil

[tmsmini]

Did someone say there is an eeprom in here:


Something that can be modified?
Maybe something like the external Superchips, but it is an in-effective solution at best.

Edited by tmsmini, 23 September 2012 - 02:55 AM.

[icklemini]

Icklemini : Did you have seen SPI car from the challenge ? If so, did you seen the specific SPI mods ?

Yeah i look after a few... got one coming in today for a bit of work....

[phil242]

Hi,

I said there is a lot of interesting stuff on this board (click the photo to ZOOM it) :

 MEMS_2J-01.jpg   97.31K   42 downloads

BLUE : it is the CPU, the only processor, a Motorola MC68332, no instruction or data in it.
RED : the EPROM, 27C1024 (size 65K x 16Bits) all the MPI software is in it, alarm handling, injection table, but no "volatile" information
YELLOW : the EEPROM, C66 (means 93C66, size is 4Kb) all the faults code, alarm encoding, learning is store here

I have start the reverse of this ECU long time ago, but as my MPI get stolen by bastards and then I bought a SPI, I left this job unfinished.

This means if someone spent time on this ECU, it can be FULL reprogrammed. An urban legend to said the MPI can't be remapped ! It's just a problem of time/money/knowledge.




To be clear, let's talk about SPI. Unfortunately for the SPI the CPU plus the EPROM is in a SINGLE component, who can't be read. Means, it's IMPOSSIBLE to have access to the code as said above. The MNE 1010XX CAN'T be remapped. End of the story...

After, the system as TMSMini show, a piggy-back system if I name it correct in English, is a not so bad solution : the extra added ECU trap the injector signal and send it back a little wider, so the opening time is changed. It means that the engine run rich.




IckleMini, about the Mighty Mini, I just understood it's only SPI on the lane . I have read the technical description of the engine, not much thing are allowed. The camshaft must be STOCK .
How much BHP those engines achieves ??? Did you notice some mods worth to be done on our engine ???

Cheers,

Phil

Edited by phil242, 24 September 2012 - 08:20 PM.