Saxo vtr turbo 5th injector piggy back ecu

[Garrysaxovtr]

Hello sorry if this as been covered. I have saxo vtr just fitted turbo with 5th injector what I need to know can I use piggy back ecu to run the 5th injector instead of mf2 ? Or are they the same thing ?. And if I can use piggyback ecu do I wire it to just the 5th injector or all the injector?
I have piggyback ecu with 3bar map sensor so if I can use it save money not having to buy mf2

[sri_130]

Hmmm not sure about the piggyback, is it one of those Dastek things from years ago? You might struggle to get someone to map that nowadays? and I'm not 100% sure it was a driver for a 5th injector anyway, just a way to loosely map the stock ECU IIRC.

When I made some notes on budge turbo installs, the MF2 was the driver of choice for the 5th injector. It meant you could map it (technically, not literally) yourself with a screwdriver! But then you hit another problem, in that the ECU detected the fuelling and trimmed it back, dangerously lean in places. So to override that, you used SigCon to prevent it. This is all from memory, but try searching on here, to verify.

To save money, get some second hand Megane Injectors (I've just seen a set on Faceballs for £45! - Brown ones, so early, but still good enough I believe for low boost) and get yourself to Wayne @ ChipWizards. That way, it'll be done correctly and no second guessing what to run with what.

[Garrysaxovtr]

Thanks for the reply the piggy back ecu I have can be tune by yourself don’t need mapping that what was making me think it be ok to run 5th injector like mf2

[sri_130]

What is the ECU?
You still need a driver for the 5th injector. I'd be 99.99% sure, that the piggy back will not drive it.

[Garrysaxovtr]

Greddy e manage blue

[Garrysaxovtr]

Where could I get injector drive mf2 from ? Everywhere I look not getting anything

[sri_130]

The G-reddy has a built in tool for scaling/correcting injector sizes? then just get some Megane injectors and forget the 5th idea.

[sri_130]

The G-reddy has a built in tool for scaling/correcting injector sizes? then just get some Megane injectors and forget the 5th idea.

Actually, googling the E-manage only allows you to 'add' fuel and not subtract. So I'd be concerned with how that would even idle with Meg injectors...

I'm guessing this is a low boost setup?! Don't really know what spec you are going for. Have you mapped a car before?

CiTuning used to sell the MF2. It's nearly £400 now. Which would be thereabouts the cost for Chipwizards sorcery.

[Garrysaxovtr]

I was just thinking that myself. Thanks for your help. I have set of injectors out of c2 vts sitting here do you think they would be any good to use for week till I get set of bigger injectors

[Garrysaxovtr]

Yeah low boost build and cheap mate only doing it for bit of fun tbh.

[sri_130]

Post the full spec of what you've got - impossible to say anything with any certainty for the few left on the forum.

Good to use? you mean, just putting them in and running the thing without the ECU/mapping etc?

[Garrysaxovtr]

the kit I have I got from someone off ebay so not sure on full details it’s only small turbo can get details tomorrow it’s homemade kit. it come with 5th injector and wiring with relay in it and air pressure switch ?. I was thinking maybe the vts injectors if they fit with the Greddy e manage and the 3bar map sensor

[Garrysaxovtr]

Not running intercooler at moment. I want to get it running on low boost for now and then in month or so I will go with standalone ecu and start tidying up the build

[gti180craig]

In my experience having turbod a vtr myself get yourself a Intercooler which is cheap a toyo sports one is only like £80 and get some universal ic pipes plum it all in u will also need a 2 bar map sensor found on the 207 gti and a set of injectors remember Megane 225 don’t fit the vtr u need bosch type ones speak to Wayne for the correct ones u need plum all your turbo in and ic but don’t fit the map sensor or injectors book yourself in with Wayne for mapping and drive off boost to him I drove over 100 miles to him unmapped and off boost and the car was fine the 5th injector is in my opinion just a way of bodging it to fit and it won’t last long before your engine explodes my thread is in the members pics bit if u want a look it’s called my paxo have a look and I will answer any questions that u have

[Garrysaxovtr]

Thank you mate do you have details for Wayne ? I will have look at your build now

[Garrysaxovtr]

That’s nice build mate. So I could go with my Greddy e manage piggy back ecu with a 3 bar map sensor I have for it and bigger injectors and get away with the 5th injector ? I was told you could now map standard ecu ?

[gti180craig]

Yea Wayne can map the original Ecu to read boost

[Garrysaxovtr]

Can I ask who Wayne is please? Do you have he details ? How much is he map

[gti180craig]

Google chipwizards or drop him a message on here as he checks in now and then

[Garrysaxovtr]

Ok thank you I will get on that mate

[Chipwizards]

I'd only be interested in doing it if the install job has been done properly.
:-)

[Garrysaxovtr]

Yeah everything been fitted right mate only thing I need to get is bigger injectors. What injectors would say best ? And how much for map

[Chipwizards]

Yeah everything been fitted right mate only thing I need to get is bigger injectors. What injectors would say best ? And how much for map

What spec is it?

£100/hr + vat

[Garrysaxovtr]

2001 saxo vtr with t25 turbo got intercooler on its way need get injectors but need know what are the best ones to go with ? And got 1.9 head gasket going on the weekend

[Garrysaxovtr]

Went could I get booked in with you ? And how many hours roughly do you need

[Chipwizards]

Three plug ECU?

[Garrysaxovtr]

Yes mate

[groky89]

Wire your 5th injector to a pressure switch will cost ya 3 quid. That’s what a done a few year ago when I turbo my 106

[Garrysaxovtr]

What sort of pressure switch we talking mate ?

[groky89]

Any pressure switch will do. I used 1 that was adjustable out of a Combi boiler before and wired it to the injector harness that’s already on the car so sprays at the same rate. And put 4 bar fuel pressure regulator in the tank. Use a wideband tho if you go down this route and if it’s running lean put a bigger injector on the 5th. I never had any issues tho always worked perfect for me. It’s the cheap way around it. My car lasted 3 year before I bought a diesel and broke it for bits

[Garrysaxovtr]

What do you mean by wideband mate ? I and how did you have fuel pressure regulator in tank mate

[Garrysaxovtr]

Wideband lamber ? And how did you have the fuel pressure regulator in the tank mate and did you use any regulator?

[Garrysaxovtr]

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F 380193164669
Would that work ?

[groky89]

Yes that’s what you need to up the fuel pressure. They are a direct fit. They go in a holder on the fuel line under the rear seats theres a big round black thing they go under there on top of the fuel tank. Search eBay for aem wideband

[Garrysaxovtr]

Thanks mate

[Garrysaxovtr]

I take it you had air switch running from fuel rail then to 5th injector? Wiring in to the injector loom