Tuning seicento mpi decat

[Red Rocket CINQ]

Hi I have a 52 plate MPI fiat seicento, I have a superprint Mani and stainless exhaust that I want to fit to it but the manifold only has the hole for one lambda because my other sei was an spi. If i get a second hole made and fit the second lambda the engine managment will come on if i leave it unplugged will it still come on? If so how do I get around this? Thanks

 

[fingers99]

Decatting is strictly for the birds. It will gain you very little power unless you remap the ECU to run very rich (it'll almost certainly fail emissions if you do).

So, run a cat. You'll need something like the SPI cat. The Rover KV6 cat is about the right size and shape and shockingly cheap on eBay. You then weld a threaded boss (all the exhaust places sell them) after the CAT and fit the post CAT lambda onto this.

A silly bodge which seems to work is to wrap the second lambda in aluminium foil.

BUT an MPI car without a cat (or, I guess, with a lambda wrapped in aluminium foil) will fail the MOT unless you're having sex with the examiner. And you won't be able to have sex with the VOSA examiner at the spot check point 'cos the police will be there ready to arrest you for whatever......

Be aware that the late MPI ECU is fussy, the early MPI ECU (the micro ECU) fussy, very difficult to work with, and unreliable.

 

[Red Rocket CINQ]

this might sound like a silly question but when you say wrap it in foil, does it have to still go in the exhaust or leave it out and tie it up? Don't the sensors have to be hot to work or is that just the first sensor?

 

[fingers99]

Just wrap it in foil and tie it up.

It'll stay hot enough. The second sensor pretty much just tests that the first sensor is running.

 

[Red Rocket CINQ]

Oh ok then I'll try that other tomorrow or Monday, thanks for the advice.

 

[hf turbo]

or you could sell me the manifold lol

 

[Red Rocket CINQ]

nah sorry mate lol

 

[hf turbo]

did you pick it up on ebay a few days ago?

 

[Red Rocket CINQ]

No i bought it off smokeychento a few months ago

 

[hf turbo]

ah ok. i got outbid at the last min last week whilst my internet decided to crash

 

[Red Rocket CINQ]

Gutting, how much was it going for? Was it a supersprint or a different one?

 

[hf turbo]

it was a supersprint mate and went for £55

 

[Red Rocket CINQ]

wow that's really cheap and very unlucky. Why don't you just knock the inside of your cat out for know?

 

[hf turbo]

it is straight through inside the cat atm next step is the manifold mate

 

[Red Rocket CINQ]

ah ryt, loud as hell when it pops with a hollow cat ain't it lol

 

[hf turbo]

lol it does sound nice when going through the gears, i do still have two silencers so its not tooo loud

 

[Red Rocket CINQ]

when I've got the supersprint and powerflow exhaust on it sounds really raspy, sounds like a rally car lol I got a vid of it on youtube of my old cinq poping flames with the system on.