Exhaust Manifold Detailed

[benanderson89]

I managed to find a picture on Piston Heads showing a CGI render of the exhaust manifold in RHD and LHD models and the differences between them.

To say its a pretty extreme change is an understatement. So if anyone wants a full exhaust system doing then... well... looks like we're fresh out of luck buying anything off the shelf. Custom made or nothing. :(

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[jord79]

Is that specifically the Mustang or a generalisation?

Wonder what the manifold on the other bank looks like and if it has been changed? (i.e is it a funny shape to fit round a steering column that is no longer there?)

 

[benanderson89]

Its for the Mustang (hence Mustang forum ;) )

I believe the headers on the LHD models are mirror images of each other.

 

[McDoodle]

I managed to find a picture on Piston Heads showing a CGI render of the exhaust manifold in RHD and LHD models and the differences between them.

To say its a pretty extreme change is an understatement. So if anyone wants a full exhaust system doing then... well... looks like we're fresh out of luck buying anything off the shelf. Custom made or nothing. :(

But the good news for all the folks fitting after-market exhausts is that from the manifolds back it looks like everything is in the same position :clap2:

 

[Centurion07]

Its for the Mustang (hence Mustang forum ;) )

I believe the headers on the LHD models are mirror images of each other.

How could that be?

If the steering column causes a problem on the RHD cars, surely the same problem would appear on the LHD ones if the manifolds were mirror images, like they were originally for the RHD ones?

 

[jord79]

Perhaps the steering column itself isn't mirrored? Say it's got all kinds of stuff attached to it that make it asymmetrical, it would be moved over to the right, but not necessarily flipped.

PS, I'm aware this is a mustang forum but as you said the image was from piston heads and didn't contain its own caption, it was slightly vague about whether it was a diagram specifically relating to the mustang or just another LHD/RHD model, or even just an example of how it might be modified.

 

[benanderson89]

How could that be?

If the steering column causes a problem on the RHD cars, surely the same problem would appear on the LHD ones if the manifolds were mirror images, like they were originally for the RHD ones?

Engine bays are not symmetrical and steering racks aren't a mirror image of each other. I believe on that side of the engine you also have to content with the like of the alternator.

 

[SteveS]

It's a mystery to me, however it shouldn't have been to Ford's design team. IF it has caused delays...

 

[McDoodle]

It's a mystery to me, however it shouldn't have been to Ford's design team. IF it has caused delays...

^ this ..... look at the plan view. In a world of CAD and virtual modelling that isn't just a little change, that's a massive change! If they've had to change the manifold that much to miss the steering column there's surely no way it was even close to being correct in the original design? So was this the real reason for the delays or is it just BS? :shrug:

 

[djone101]

I've been talking to a couple of header manufacturers here at SEMA (ARH and BBK) about the RHD issue. I'm pretty sure we can work with them to test fit their LHD set-up on our car as soon as we get it. We can modify it to suit our RHD cars and then feed back the design changes so that they can then offer a RHD option.

There's demand from Australia for RHD stuff too so we're not on our own.

There's so much good S550 stuff here at SEMA this year...

Dave

 

[Gibbo205]

I've been talking to a couple of header manufacturers here at SEMA (ARH and BBK) about the RHD issue. I'm pretty sure we can work with them to test fit their LHD set-up on our car as soon as we get it. We can modify it to suit our RHD cars and then feed back the design changes so that they can then offer a RHD option.

There's demand from Australia for RHD stuff too so we're not on our own.

There's so much good S550 stuff here at SEMA this year...

Dave

That would be epic, I've gone Corsa Sport catback system which will fit just fine. But if and when I add that big Whipple blower I'd like to make the power gain as efficient as possible with less strain on the engine and believe it or not even though going with larger throttle body and headers will give you a good 100BHP more, you get that extra power with less boost due to better breathing efficiency.

So I'd be well up for an ARH header 3" de-cat or sport cat setup in a year or two time and you'd get the business and am sure many more.

 

[matt020876]

After market exhausts are from the cat back not the manifold back

 

[benanderson89]

After market exhausts are from the cat back not the manifold back

I'll go tell every header manufacturer that they've been doing it wrong the entire time, then.

 

[slowhand99]

^ this ..... look at the plan view. In a world of CAD and virtual modelling that isn't just a little change, that's a massive change! If they've had to change the manifold that much to miss the steering column there's surely no way it was even close to being correct in the original design? So was this the real reason for the delays or is it just BS? :shrug:

I would suggest it's less a case of missing it than long term heat soak issues which wouldn't necessarily come to light at the design stage. These cars are designed with air flow in mind. Maybe someone told them about driving at 2mph on our major motorways.

I like the suggestion of fit testing some aftermarket headers as their designs are generally more elegant than OEM and more heat efficient so may not cause a problem.

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