Convert N/A to a Turbo sw20

[mitec31]

Hi,I want to convert a "v reg 2000"N/A MR2 to a turbo MR2 what parts will I need other than 3s gte engine/ecu/gearbox/driveshafts any help would be appreciated thx

[alanmr2turbo]

passenger loom (makes life easy)

intercooler
fuel pump
gear linkage cables
rear hubs
exhaust
turbo clocks (not 100% required)

[alanmr2turbo]

I take it you will get all the sensors with the engine like the

Injector pack
coil pack
ignitor
map sensor etc

You may also need the air filter

[Peter Gidden]

passenger loom (makes life easy)

Really? Can't see how. Some wires will always need cutting/shutting and it's a damn site easier in the boot/engine bay than in the footwell.

I've never changed the body loom since the 1st turbo conversion i did years ago, and realised i'd completely wasted an hour or so of my life doing so.

And IIRC, there is a speedo sensor wire that'll need messing with behind the rear cockpit bulkhead carpet. More waste of time.

Keep the body loom, and the wiring mods can be done in the rear of the car in 15 minutes.

[PW@Woodsport]

Totally agree, forget changing the passenger kickwell loom, i've only ever tried this once and it was a lot more work than just repinning a few wires at the engine loom end.

Due to the various revisions to the wiring you may or may not have a multitude of different faults changing he kickwell loom, granted your engine will fire straight up but you could be chasing a ream of other faults including power steering, ABS, foglight and one or two others i can't remember right now (been absolutely years since i did it that way)

Do all of your wiring changes on the new engine harness/ECU/engine bay fusebox plugs , it's way less hassle.

On top of that it's also a major chew and loads of extra work taking interior out and routing that harness, but who knows, you might get lucky and it "could" all just work doing it that way.

People properly in the know repin at the engine end.

[GreddyMR2]

When I was doing rev1 N/A to rev1 turbo conversion, I changed body loom, because with N/A loom car was not running. After changing no repinning was needed and car started perfectly. And there was not a big deal to do that. Just a couple of interior bits out and that's it.

[PW@Woodsport]

Because you did rev1 to rev1 and were lucky enough not to have any pinout differences, now imagine you did the same thing and had a stack of faults to trace, hence Peter and my advice not to do it that way.

[jasongtr]

or just buy a turbo car and sell the NA - or is that too easy

[GreddyMR2]

Because you did rev1 to rev1 and were lucky enough not to have any pinout differences, now imagine you did the same thing and had a stack of faults to trace, hence Peter and my advice not to do it that way.

Yes, I was lucky For me strange was that LHD and RHD did not have pinout differences.

[alanmr2turbo]

passenger loom (makes life easy)

Really? Can't see how. Some wires will always need cutting/shutting and it's a damn site easier in the boot/engine bay than in the footwell.

I've never changed the body loom since the 1st turbo conversion i did years ago, and realised i'd completely wasted an hour or so of my life doing so.

And IIRC, there is a speedo sensor wire that'll need messing with behind the rear cockpit bulkhead carpet. More waste of time.

Keep the body loom, and the wiring mods can be done in the rear of the car in 15 minutes.

All the conversion i have done i have used the Passenger loom and never had any problems with any ECU throwing up errors and never had to re-pin any of the looms.

May take you an hour if your slow but saves you the ball ache of re-pinning.

[PW@Woodsport]

Alan if you replace the kick well loom of course the new engine will run without fault, it's the chassis electrical faults you create in doing so that are the problem, some are lucky like you, but for many there are issues. Both Peter and myself have converted scores of cars between us and we know the issues all too well.

Sorry but it's definitely easier and less problematic repinning at the rear.

[mitec31]

Thanks guys for info,my problem is that a have a rev3 1996 turbo t-bar with lsdiff +traction control with Apexi power fc and all the toys inc Tein's plus engine mods but number 2 piston has blow a ring and the body is faded and needs work hence the purchase of the Rev5 year 2000,my intention is to transfer all the goodies from the rev3 to the rev5 .The engine block/head will not be used as I am having a replacement block bored to 87mm to take a set of fully balanced forged pistons and replacement head inc up-rated cams built.Since I have a complete donor vehicle where do I start first??do I just drop the complete rear subframe inc engine from the rev3 to transfer it to the rev5 or are there any mods to be made before hand?