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Discussion Starter #1
Interested in ECU replacement in my 2.3LPT and having read the Maptun blurb am about to jump in. One question - is it a straight magic box swap, unplug one and plug another in? Do I keep my old box? Can I swap back if I change my mind? (Oops -that's three questions).
 

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Hi there

Yes, ECU replacement is a pretty straightforward swap. MapTun will need your old ECU back once you're done, though, although it might be possible to keep it if you pay a surcharge.

Your other option is to source a used ECU, eg from a breaker. You can then have this one reprogrammed (provided it's suitable - check with them before buying it!), and can consequently keep your old one if you need to swap back.

Cheers

James
 

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Not a dumb question - fits on the bulkhead, under the plastic cover that surrounds the windscreen wipers. So you need to take the wipers off & remove this panel.

However, when I had mine fitted (the Saab upgrade), the ECU had to be programmed to talk to the car - AFAIK, this only affected the immobiliser.
 

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First decide whether you will fit it yourself or at a dealer / other.

In either way you will have to read off the part number, date of manufacture and the 15 digit code on the connector. So the unit has to come out before ordering (quite simple to do, except for the first time, just remember to disconnect the battery) - or these numbers can be read by TECH2.

You have another option (assuming you don't want to lift the bonnet), and that is a PPC system (BSR). In which case as long as you have the ecu numbers (go to a dealer) you can place your order and the upgrade will be ready to rock via hook up to the diagnostic pull in the driver footwell. This will allow you to swap between std and modified states of tune.

Supplying the correct ecu data on ordering will not require the security system / key to be married to the new ecu....it is all done by the nice guys in Sweden.

Take the plunge, and enjoy
 

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Discussion Starter #6
Fortunately (I suppose) my car doesn't have a security system so that's one less problem seemingly. I like the idea of swappability Rhod; where's such jiggery-pokery done? At a main dealer? If so,will they co-operate or show me the door as it's not an official SAAB mod?
 

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Alas saab tyro's car is a 9000 ... PPC is great, but only available for Tech II-equipped cars - 9-3, 9-5 and 9-3SS so far.

James
 

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Saab tyro

check these guys out for Maptun upgrades (they will do everything for you)

Bourne Motors
Saab Specialist
1-2 Cornfield Lane
Eastbourne
BN21 4NE

Telephone: 01323 727011
Telefax: 01323 648680

www.bournemotorssussex.co.uk

Contact Andrew Chaffin




Saab Centre
Unit 11 Fernfield Farm Ind. Est.
Mursley
Milton Keynes
Buckinghamshire
MK17 0PS

Telephone: 01908 505587
Telefax: 01908 503620


or a bit further away

Abbott Racing Motorsport
Spinnels Farm
Spinnels Lane
Wix, Manningtree
Essex CO11 2UJ
UNITED KINGDOM

01255 870636

Sales - [email protected]<br />web www.abbottracing.com
 

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Discussion Starter #10
Thanks for that, Rhod - sounds to be exactly what the doctor ordered. What about the point(s) made by James and Leon though? As my car is indeed a 9K (with Trionic, though which version I haven't the foggiest) won't that fact render it incompatible with the upgrade you suggest (recommend?). The input of all is greatly appreciated, by the way.
 

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Originally posted by saab tyro:
[qb]my car is indeed a 9K (with Trionic, though which version I haven't the foggiest)[/qb][/b]
It's Trionic 5. It is indeed incompatible with PPC, which works with Trionic 7 onwards (there was no Trionic 6, at least not in production cars).

Do Abbott Racing really do Maptun upgrades? Surely they're competitors? I can heartily recommend Maptun. I have had less success with Abbott but never used them for ECU upgrades. As far as power/pound is concerned, I think Maptun have the edge and I have hard of no reliability problems with their standard upgrades (I do have to be careful with my Aero's transmission, but I did specifically ask them for more torque and no boost limit in 2nd gear - M3-style 0-60 and 0-100 times, though
)
 

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Discussion Starter #12
This is excellent stuff - thanks. On the question of the tranny being given a tough time BillJ, mine's the automatic box which, I understand, is operating near design limits, even with the relatively puny 170bhp that the LPT is rated at. Disaster looming?
 

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Originally posted by saab tyro:
[qb]Disaster looming? [/qb][/b]
Don't know for certain. It seems many tuners (I can't speak for specific ones) take account of the auto transmission and limit maximum torque to avoid problems. They could still provide significant horsepower increases at higher RPM without supplying stressful quantities of torque through the transmission...
 

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Discussion Starter #14
Sounds like case of 'suck it and see', but be careful. One other point occurs; will an ECU swap murder my ECO fuel consumption, even if I more or less continue to drive as I normally do?
 

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Originally posted by saab tyro:
[qb]Sounds like case of 'suck it and see', but be careful. One other point occurs; will an ECU swap murder my ECO fuel consumption, even if I more or less continue to drive as I normally do? [/qb][/b]
My fuel consumption improved slightly (probably within the margin of error, but certainly no huge change).

Abbott ECU in a '97 2.3 lpt auto. Abbott mention the auto on the page about the upgrade and say their upgrade is well within the capibility of the auto box, which is one of the reasons I went with them

I'm not entirely sure I believe them, though, the improvement in torque feels more than enough to go over the design limit of the box, but I haven't stuck in on a rolling road yet to find out.

Abbott's stated improvements are less than for Maptun etc (for manuals). If you have an auto, then this apparently less result for your money can actually be an advantage!

P. (who is, however, thinking of seeing if Maptun do competitive upgrades, never mind what that does to the 'box
)
 

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Discussion Starter #16
Sorry chaps, but I've had a further thought; does moving up to a stage one ECU set-up introduce the dreaded turbo lag (which is mercifully not apparent in my cooking LPT rig)?
 

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Discussion Starter #18
Poised to order my Maptun kit (having taken on board all the above, for which many thanks) when, idly scrolling about the Saabscene boards, I see that Elkparts appear to offer a greater-power-increase Stage 1 for less money (reduced price, apparently). Is this the better bet that it seems or is there some hidden trade-off?
 

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Maptun = extra power throughout rev range
Speedparts = extra power above ~ 2750 revs

Speedparts approach leads to a "Jekyl & Hyde" car - normal pottering is exactly as the standard car but put your foot down and it becomes a ravening beast!

Both suppliers will take your auto box into account when programing the ECU.

The job is so easy that if you can manage a screwdriver you should be able to DIY without any problems.
 
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