Piggyback ECU on S2/S4

[asperilla]

Hi all.

Good idea, Bad idea?

Will it work?
Wont it work?
Or wont it work well?

I see Perfect Power and Dastek Unichip make piggy back ecu's for these cars.

What are the pro's and cons?
Im looking to increase power by about 200hp. I have the T3/T4 Turbo hi flow manifold. 600cc injectors and bigger cooler.

Just need some way of controlling the timing and the fueling?

Please advise. Tx

[prj]

No, forget it, go standalone.

[asperilla]

Already bought the 034 chips but now want to use custom hardware...

[prj]

So buy VEMS or other standalone...
Piggyback won't work on this, you will hit a lot of problems.

[diogocartier]

I'm using an Unichip on my S2, without issues until today....

[prj]

There is a pretty big difference between proper tune and "it somehow works"

[diogocartier]

I think that the unichip is doing a great work, but the difference is on the tuner.

Anyway, I know that standalone is better, but here in Brazil is difficult to find someone with a good knowledge on that.

That's why i'm using the piggyback.

Leaving on Europe I would go on Standalone, for sure.