Manifold conversion

Here are a couple of photo's of the headers from a 156 2.5 that will be going onto my GTA.

As you can see no pre-cats. Should increase hp and produce a better sound.

sorry having trouble uploading.

look up

It looks nice man. Does it have any hole for sensor?

One does but the other needs altering. Here is a photo of what needs to be fixed.

I'm in the middle of converting a (Euro 2) 2.5 156 to run a GTA (Euro 3)motor. I was looking at the 2.5 engine as it was sat on the garage floor last night wondering if the manifold will clear the GTA's oil cooler gubbins on the back of the engine - the 2.5 has a small heat exchanger set up.

Another problem you could be up against, aside from the emmisions issue, is that the down pipes from the maifold could be different. You might need them of a 2.5 and some mechanism to hook them up with the euro 3 GTA exhaust.

Originally Posted by GTAowner

One does but the other needs altering. Here is a photo of what needs to be fixed.

He's talking about the 2 lambda sensors in the GTA manifolds, as far as I know, the 2.5 manifolds don't have a hole for them....

Took the manifold off the 2.5 tonight and tried it.

It fits.

http://i46.photobucket.com/albums/f1...t/IMG_1342.jpg

http://i46.photobucket.com/albums/f1...t/IMG_1344.jpg

The 2.5 set up:

http://i46.photobucket.com/albums/f1...t/IMG_1345.jpg

yes as mentioned earlier, you run into all sorts of issues. There was a thread earlier where someone said they just stuck it on a GTA, but how i never figured out..I got a converted 2.5 and a GTA out in the garage, and can not see how a 2.5 manifold will fit a GTA straight over.

It will however go well with a 2.5 coverted to 3.2 like yours Chris, In fact it will make life easier for you in respect to the remap, so id definitely go for it.

Chris, let me know when you get to the point where you connect the 2.5 fuel line to the GTA Injectors... you might have a small issue there..the 2.5 connector system being different to the GTA.

I'll just splice the later style connectors into the 2.5 loom so I can run the larger 3.2 injectors.

Originally Posted by Chris155

He's talking about the 2 lambda sensors in the GTA manifolds, as far as I know, the 2.5 manifolds don't have a hole for them....

There is a hole for the sensor on one of the headers but the other with need to be altered.

The downpipes should be basically the same. Only difference is the 2.5 downpipes merge into 1 where there is one vibration absorber but that wont make a difference. Obviously gotta get it in the garage b4 anything can be guaranteed.

Took my car in to the garage yesterday for cam belt change, service and to get my new headers installed. Peter K your right, cant be done, 2.5 headers are completely different, angles of the pipes are an issue and the headers will not line up with holes on the block.

Looks like i'll have to keep saving for the supersprint manifold.

Originally Posted by GTAowner

Took my car in to the garage yesterday for cam belt change, service and to get my new headers installed. Peter K your right, cant be done, 2.5 headers are completely different, angles of the pipes are an issue and the headers will not line up with holes on the block.

Looks like i'll have to keep saving for the supersprint manifold.

"Angles of pipes" Do you mean the oil cooler pipes of the mainifold out let pipes in relation to a GTA front pipe?

Originally Posted by GTAowner

Took my car in to the garage yesterday for cam belt change, service and to get my new headers installed. Peter K your right, cant be done, 2.5 headers are completely different, angles of the pipes are an issue and the headers will not line up with holes on the block.

Looks like i'll have to keep saving for the supersprint manifold.

That's no good I hope you can get a refund back from Milano Spares.

Dont know the in depth details was told it just wont work.

Yea there gonna give me a refund.

Nothings ever that straight forward i guess.

I reckon it'll work with 2.5 front pipes.

Bit expensive, but looks nice ...

manifold

its a supersprint.

Its still got a pussy in it.

abc

Originally Posted by Chris155

if you've got a 156 I reckon the following would be a better option....

Find some euro 2 2.5 v6 manifolds and modify them to accept the pre cat lambdas, then hook them up to this front pipe set up:

http://i46.photobucket.com/albums/f1...it/header3.jpg

http://i46.photobucket.com/albums/f1...it/header1.jpg

Attach it to a decat and then a custom set up ala Chrish's suggestion

http://i62.photobucket.com/albums/h8...a/DSC_0039.jpg

I reckon around 1.5k including a remap if you do it yourself.

Hows the sound?

dunno, there's no way in hell I'd spend that kind of money on a exhaust....