Stuey F

All this talk of ECU's has got me thinking

Power Engineering place emphasis on mapping their PE1 ECU upgrade to the individual car AFTER the upgraded parts e.g. filter, downpipe, backbox have been fitted because every car is different and it tailors the map to the mods fitted.

Based on this, is the PPP ECU upgrade mapped to the individuals car or is it just an off the shelf item. If it is the case that it is an off the shelf item, how can this be if every car is slightly different, surely it needs to be mapped to the individual car?

Also many people seem to get the PPP fitted then add a filter and a certain exhaust.

Based on the PE1 being mapped with all the mods fitted, how is the PPP affected by adding different parts other than those that are part of the PPP after it has been fitted.

If PE made just one map per model of Impreza available surely based on the different mods fitted, the cars would run like a dog, which is why they do a map to the individual.

So how is it the PPP is identical on every car yet some people add different filters and exhausts with out known problems.

cheers

Stu

[This message has been edited by Stuey F (edited 24-11-1999).]

firefox

Howdy..

It comes down to the mapping..

It seems PE take the maps to the extreme.. hence on some cars it will work..other cars it wont.. hence why they map on an individual basis... in theory mapping on a one off with get the most from that car.

The PPP map is generic (I believe) and as such they dont take the maps to the limit.... this will allow them to work on all cars... but wont produce as much power/torque as it could.

Prodrive are after reliability and compatability for all the cars... If they wanted to, they could get more power out of the ECU.. but chances are it might cause problems on some cars...

Companies (car manufacturers and Prodrive) spends £100K's if not more on the ECU and mappings (probably £1M on the ECU design and maps)..no offence to PE (or any other remapper), but there is no way they will invest that sort of money into establishing a "good" map

J.

Lee

From the results of my boost increase mod, it looks like the PP simply raises boost !

looks even more like a rip off now...

Stuey F

Cheers Firefox, answers my query nicely, however what are the traits of a map that has been taken to the extreme??

over and out

Stu

pwebb

actually - I think you will find that Prodrive simply buy 'their' ECUs from subaru/sti in japan - so not much money/time invested on their part at all !

besides, a minor change like switching the filter/backbox will be quickly compensated for as the ECU learns from the various sensors...unlike fixed settings in 'piggy back' chips (PE) and the link computer which WOULD have to be changed to suit the new parts.

cheers,

Paul W

firefox

Paul...

You are kinda correct...

Prodrive actually supply various ECU's ranging from Subaru/STI, GEMS, Motec..

STI are the brains behind the ECU.. but I believe Prodrive do alot of research, then get STI to manufacture the units..

J.

ps - You can buy "blank" ECU's from Prodrive...

DennisT

The learning function inside the ECU holds it's parameters inside a serial electrically erasable rom. This is not changed in the PE chip conversion, just the ROM memory inside the processor is replaced by external Eproms. Therefore the unit still retains it's adaptive algorythms.

Dennis