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Fitting a multiplex engine to an older car
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Kale

Posted: Fri Dec 27, 2013 5:22 am

Joined: Nov 25, 2013
Posts: 50
Trade Rating: 0
Location: Southern Finland

Let's talk about the topic on thought-basis. What would be the problems I would run into if I would for example fit a EW10J4S (GTI180/RC engine) to a 306.

The engine loom on a GTI180 looks quite traditional, even if the rest of the car is plexed. But does the ecu talk with the engine sensors etc. via the multiplex channel or is it plain old electrics. If I would acquire a unlocked ecu for one and wire up the wires needed to the wiring of the 306 chassis (ignition, rev counter, alternator and so on..) would the engine fire up when the key is turned?

Not saying it's an easy PnP task but this is just something I've thinking for a while now.

Easy route would be using an aftermarket ecu but if let's forget it for now.

The gas pedal could be acquired from a 306 HDI to make it control the electric throttle valve on the EW10J4S.

I've seen some multiplex engines fitted to older cars but they have all the electrics transported from the donor car and all of them have been a little or more frankenstein than others.

It would be nice and neat to use the 206 engine wiring and ecu etc. to make it look like a stock build.

Is this possible?


	306 S16, 306 GTI-6, 605 SV24, 205 GTI-6, 2x405 Mi16, VW T3 1.9TD/AAZ, Audi TT mk2 3.2 quattro, Audi A6 2.7 biturbo quattro

heyziq

Posted: Fri Dec 27, 2013 6:05 am

Joined: Feb 07, 2010
Posts: 620
Trade Rating: 0
Location: Malaysia

use whole wiring mate like what i did when conversion multiplex to preplex, atleast engine wiring, dashboard, and interior, door and rear wiring such as lrear light can be remade, but beware gti180 have limp mode, when some wiring not perfect, economy mode activated, if u know how to hack the ecu its ok :), or disable function that not use


	heyziq.com

Edward

Posted: Fri Dec 27, 2013 9:35 am

Joined: Feb 08, 2010
Posts: 7045
Trade Rating: +5
Location: In the garage

The engine is also part of the ESP system so to avoid any hassle I'd just take the engine and fit it with a standalone ECU.


	2001 GTi 138, Bilstein Sprint dampers, H&R springs, 21mm Peugeot Sport torsion bars, 22mm rear ARB, Peugeot Sport Group A wishbones, 283mm discs, Goodridge stainless hoses, Maniflow 304 grade 4-2-1 2.5" manifold and system, 200 cell cat, Richard Longman head, 45mm Jenvey throttle bodies, 9.5mm TB spacers, 90mm air horns, Jenvey throttle linkage, Jenvey fuel rail, Aeromotive and Goodridge fuel fittings and braided hose, ITG sausage filter, Radtec custom radiator, Piper Ultimate Road cams, Piper vernier pulleys, Omex 600 ECU. Saxo electric PAS pump, Vibra Technics engine mounts. Samco coolant hoses, TTV steel flywheel, 4.76 final drive ratio, 307 CC 180 ratios. 2019 BMW 530i. 2017 Mercedes C300 convertible.

Kale

Posted: Fri Dec 27, 2013 2:29 pm

Joined: Nov 25, 2013
Posts: 50
Trade Rating: 0
Location: Southern Finland

Well the RC/GTI180 I was working didn't have ABS/ESP working at all and the car had full performance all the time - didn't go to limp mode.

And if you didn't read the first post, I would not be comfortable having a 206 wiring system on a 1994 306 Very Happy

And to make it clear, I'm not making a conversion like this, yet.. Just looking through the options I have when I do and also gathering bits of information beforehand Smile

I'm pretty sure that the ESP can be deactivated from the engine ecu. But is it possible to unlock (deactivate immobiliser) these multiplex ecus?


	306 S16, 306 GTI-6, 605 SV24, 205 GTI-6, 2x405 Mi16, VW T3 1.9TD/AAZ, Audi TT mk2 3.2 quattro, Audi A6 2.7 biturbo quattro

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