[Mk2] [Turbo] i want 300bhp ish :P

[Peter Gidden]

Rev2 - Rev3 conversion parts :

Rev3 injectors
Rev3 ecu
Rev3 engine loom - not essential, but much easier
Rev3 igniter
Rev3 injector resistor pack
Air intake temp sensor
Mass air temp sensor
Map sensor
4 wire lambda sensor

Fitting a bored out rail isn't a bad idea, and you'll also need an adaptor plate to allow the mat sensor to fit where the cold start injector currently is - gts chris sells these.

I believe the chassis loom connections are the same rev2-3, but the rev1 is different and will need wiring adjustments. The ecu wiring diagrams can be found at www.2bartuning.com

You may need to swap the alternator plugs on the looms, depending on whether yours is round or oval type, and you may need to swap the oil pressure sensors or loom plug, as the early ones had a spade type connector - whereas the rev3 has a 'proper' plug in type.

Pretty sure that covers it :th:

Just to add...

Gauge water temp sensor is also a spade on early sensors.

Different revisions of knock sensor will have different shaped moulded plug.

Resisitor pack for injectors Rev2-5 is the same - only Rev1 is different shaped plug.

[gazrev1tubby]

^ I didn't know that about the rev2+ resistor pack - cheers Pete

I forgot about the knock sensor and water temp gauge, but that list should set you in the right direction

[Peter Gidden]

I'm doing a full Rev3 ECU upgrade right now. Customer wanted full uncut Rev3 engine loom installed with all matching sensors. Engine was tired before overhaul, so we've fitted a Rev3 alternator as well.

The Rev3 plastics will not fit the Rev2 manifold and cam cover, so for the real OEM look, you can remove the plastics from the looms, and carefully fit the Rev3 loom into the Rev2 plastics. Takes a bit of work but the final result is worth it.







And don't forget to gut the TVIS!

[craig]

Seen this in the flesh, really is a smart job, and although a lot of messing about, it's defo worth the effort!

[dylan5084]

i take it if i was to upgrade to an aftermarket ecu id still need the rev 3 stuff for more power? all those sensors etc cant be cheap, and time consuming changing over

what power gains are to be had just swapping to the rev 3 stuff and the usual breathing mods?

[gazrev1tubby]

what power gains are to be had just swapping to the rev 3 stuff and the usual breathing mods?

None really to be honest. If you have a steel headgasket, it'll allow you to raise the boost to 1.2 bar, which will net a few ponies

[dylan5084]

what power gains are to be had just swapping to the rev 3 stuff and the usual breathing mods?

None really to be honest. If you have a steel headgasket, it'll allow you to raise the boost to 1.2 bar, which will net a few ponies

So, would it not be a better idea to dump the cash into an ecu and having it set up rather than buying a lot of sensors that have no real gains? Or am I missing the point?

[dylan5084]

what power gains are to be had just swapping to the rev 3 stuff and the usual breathing mods?

None really to be honest. If you have a steel headgasket, it'll allow you to raise the boost to 1.2 bar, which will net a few ponies

So, would it not be a better idea to dump the cash into an ecu and having it set up rather than buying a lot of sensors that have no real gains? Or am I missing the point?

[Peter Gidden]

what power gains are to be had just swapping to the rev 3 stuff and the usual breathing mods?

None really to be honest. If you have a steel headgasket, it'll allow you to raise the boost to 1.2 bar, which will net a few ponies

So, would it not be a better idea to dump the cash into an ecu and having it set up rather than buying a lot of sensors that have no real gains? Or am I missing the point?

With the exception of one, just about all aftermarket ECUs (including the PowerFC) are desgined to work with MAP sensors, not AFMs. So if you intend going aftrmarket ECU in the future, now is the time to convert to Rev3 engine electrics.

[gazrev1tubby]

A fully mappable ecu and cams would be the best bet for biggest gains, but, most aftermarket ecu's would require/benefit the removal of the afm, and you'd still need bigger injectors to raise the boost safely.

Also, a steel headgasket is advised if you plan to run over 1 bar of boost, so the rev3 conversion works out to be the best bang for buck.

An aftermarket ecu will cost in the region of £500 - £2000, plus mapping. But, unless you replace the headgasket and injectors, and ditch the afm, you won't see the best gains.

Also, it's worth replacing the rev2 inlet cam with a rev3 one, if you go to the trouble of opening the engine up - it'll probably need re-shimming though. It'd also be an ideal time to replace the water pump and cam belt/tensioners.

The rev3 conversion should be close to 300bhp at 1.2 bar of boost.

I had good results using rev3 injectors and a greddy emanage piggy back, which enabled me to retain all the rev1 sensors and afm, but overall, it still worked out more expensive than swapping out to rev3 bits

[dylan5084]

is it advisable to run the rev 3 ecu, or a piggyback ecu? how much will a rev 3 ecu set you back?

[Turbonoz]

None really to be honest. If you have a steel headgasket, it'll allow you to raise the boost to 1.2 bar, which will net a few ponies

So, would it not be a better idea to dump the cash into an ecu and having it set up rather than buying a lot of sensors that have no real gains? Or am I missing the point?

With the exception of one, just about all aftermarket ECUs (including the PowerFC) are desgined to work with MAP sensors, not AFMs. So if you intend going aftrmarket ECU in the future, now is the time to convert to Rev3 engine electrics.

Link ECUs have an internal MAP sensor, so there is no conversion required. For ECUs without an internal MAP sensor, you just buy one & ditch the AFM, still no conversion required.

[dylan5084]

So, would it not be a better idea to dump the cash into an ecu and having it set up rather than buying a lot of sensors that have no real gains? Or am I missing the point?

With the exception of one, just about all aftermarket ECUs (including the PowerFC) are desgined to work with MAP sensors, not AFMs. So if you intend going aftrmarket ECU in the future, now is the time to convert to Rev3 engine electrics.

Link ECUs have an internal MAP sensor, so there is no conversion required. For ECUs without an internal MAP sensor, you just buy one & ditch the AFM, still no conversion required.

Sweet what's the going rate for a link ecu, and more to the point why isn't everyone doin this?

[Peter Gidden]

why isn't everyone doin this?

I have plenty of customers ore than happy with their Rev1/2 with CT20 running at 16psi. The extra cost involved in gaining 20-30 hp doesn't appeal to everyone.

[Magic Beans]

why isn't everyone doin this?

I have plenty of customers ore than happy with their Rev1/2 with CT20 running at 16psi. The extra cost involved in gaining 20-30 hp doesn't appeal to everyone.

They definitely wouldn't like the cost of going 400+ then!

[craig]

why isn't everyone doin this?

I have plenty of customers ore than happy with their Rev1/2 with CT20 running at 16psi. The extra cost involved in gaining 20-30 hp doesn't appeal to everyone.

They definitely wouldn't like the cost of going 400+ then!

[Turbonoz]

Sweet what's the going rate for a link ecu, and more to the point why isn't everyone doin this?

You can get them 2nd hand from around £350 upwards.

Who knows why. Running on standalone isn't just about more power, but also drivability and control tailored to each specific car.

[Magic Beans]

You can get them 2nd hand from around £350 upwards.

Plus the cost of mapping. Which is one of the reasons why people don't choose this path, as they're power goals don't warrant the investment.

[Turbonoz]

You can get them 2nd hand from around £350 upwards.

Plus the cost of mapping. Which is one of the reasons why people don't choose this path, as they're power goals don't warrant the investment.

Cost of mapping is up to the owner

Plus, it's not just about power. Well, it shouldn't be. Can save a lot of fuel running a standalone.

[Magic Beans]

Completely agree. Most people focus on the most bang for their buck and not what's better for the car in the long run.