Good Alternative After Market Management

[joris_andriesse 8]

Would like to hijack this topic.

Yesterday I got an option for Peugeot 605 2.0 8v ecu, loom, coil pack, sensors, etc.. Now I'm wondering is it worth the rebuild and remap of the ecu for my engine (specs see below).

With this option I can get it running for about half the price a (for example) VEMS would cost me, but of course the options are way more limited.

Some advice is much appreciated.

 

Engine specs:

1.9 MI16. Inlets flowed, 3 angle seat cut,PT stage 2 inlet cam, PT stage 1 outlet cam, gti6 inlet manifold, turned and balanced flywheel (-1,5kg), turned and balanced crankshaft (-3kg), turned and balanced rods and pistons, gti6 fuel injectors.

 

 

If you think this is a good alternative on a after market management, what will I be needing/doing for this rebuild? Or are there some topics where this rebuild have been done (couldn't find them with the search )?

[pug_ham 244 3 Cars]

I've split this from the topic you posted in as its a very different type of question.

 

What year & model 605 2.0 8v as the managment system differs with single or multipoint injection here in the uk.

 

Using either the Magnet Marrelli MM8P or MP5.1 ecu is possible but it would need a remap as soon as you got it running due to the map differences between an 8v & 16v engine, it will work but in no way ideal.

 

g

[joris_andriesse 8]

Thanx for the effort.

 

I think it's the marrelli ecu, but have to check on that on.

The big question remains, how much isn't it ideal? What's the biggest problem/ shortcomming of this system?

[petert 586]

Getting it running and tuning it correctly are two different things. Whilst you can theoretically remap the 605 ecu indefinitely, the time (and money) involved if you don't have the skills yourself makes it prohibitive. The flexibility of an aftermarket ecu will always be better.

[joris_andriesse 8]

I totally understand a aftermarket ecu is always better, but how much of a difference will it be. Are we speaking the last 2 hp's or 10 of them. Will the engine be running (especially half throttle) almost perfect instead of perfect, or wil it be so so. That's what I'm curious about.

 

No one here, who have been running both systems?

[wicked 103 3 Cars]

Rather start with a S16/2.0Mi16 management iso an 8v management if you want to bin the dizzy...

The ignition map will be closer to home already. (= less time needed for tuning=cheaper).

But then again, finding someone who can map it full custom won't be easy...

[welshpug 1,657]

Mapping is far simpler and quicker with an aftermarket system and software, hence cheaper.

[pug_ham 244 3 Cars]

Rather start with a S16/2.0Mi16 management iso an 8v management if you want to bin the dizzy...

The ignition map will be closer to home already. (= less time needed for tuning=cheaper).

But then again, finding someone who can map it full custom won't be easy...

 

Agreed, you would be much better to start with a standard ecu that can be remapped from a 16v engine over an 8v engine sourced ecu anyday.

 

But, you will only make a saving on the parts by using second hand items, where using an aftermarket ecu you would get a complete new ecu loom & specific map with a mapper who knows the intricacy of mapping the ecu to get the best results.

 

Very few people are comfortable with remapping a factory ecu as it doesn't get called for very often & the time taken to do this are reflected in the price charged.

 

End results might be very similar but the time needed to get there could be a lot longer.

 

g

[petert 586]

The last two responses sum it up really.

 

For example, I can now modify the mapping in a Subaru turbo. However, it still can't be done on the fly. So if I think it needs more/less cam timing or boost at a particular point, I need to make the change offline and then reflash. That can become very expensive if you're paying by time on a dyno.