Exhaust Replacement time...

[Jordan27]

Hello guys.
It seems that my downpipe has snapped just before the second cat on my 1.0l and the rattling and blowing is starting to annoy me, not to mention that my MOT is soon!
Anyways, I'm going to need to replace the downpipe, and it just happens that I have a spare Peter Lloyd downpipe from the rally car I was just wondering how restrictive the middle pipe and backbox actually are? Would a Frankspeed Manifold and Peter Lloyd downpipe be worth it if the rest of the system is standard?
The other option is to buy a Peter Lloyd System, but I'd prefer ask before I spend some dosh that I don't have

 

[skymera]

It'll only flow as well as the most restrictive part.

If you're keep the standard mid section then a bigger downpipe and mani will do sweet FA

 

[Jordan27]

It'll only flow as well as the most restrictive part.

If you're keep the standard mid section then a bigger downpipe and mani will do sweet FA

I clicked the like button because you helped me.

Thank you

 

[skymera]

I clicked the like button because you helped me.

Thank you

I helped someone

 

[MicrAde]

I helped someone

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[McMicra]

frank speed manifold with a full peter Lloyd system has done a good bit for my car feels quicker that's for sure, yet to get it dyno'd as Im a bit skint but once I get it done ill be able to say what that set up has over standard

 

[frank]

It'll only flow as well as the most restrictive part.

If you're keep the standard mid section then a bigger downpipe and mani will do sweet FA

Bear in mind that the exhaust gases are hotter at the front tho (bigger volume )

 

[skymera]

Bear in mind that the exhaust gases are hotter at the front tho (bigger volume )

Unlikely to be that much different.

Can't see a better flowing mani and downpipe doing any good on a stock mid pipe with a cat, possibly two.

 

[frank]

Unlikely to be that much different.

typical EGT in the mani @ wot = 750deg C ? and tailpipe @ wot = 250deg ?

 

[skymera]

typical EGT in the mani @ wot = 750deg C ? and tailpipe @ wot = 250deg ?

But cooler air is denser, right?

Gasses at 750c will be roughy 0.6KG/m3
Gasses at 250c will be roughly 0.35KG/m3

Gone off on a tangent

tl:dr : Get a PLR system

 

[Jordan27]

But cooler air is denser, right?

Gasses at 750c will be roughy 0.6KG/m3
Gasses at 250c will be roughly 0.35KG/m3

Gone off on a tangent

tl:dr : Get a PLR system

It's like being in college when I'm not in college.



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[Enuo]

Its worth noting that you can free up some power by reducing the number of bends in your system. A baffled backbox for example might have a constant cross sectional are for the gases to flow through the whole way through, but by convoluting the path you are causing the gases to have to keep changing direction. This requires force which is more work done by the engine eh

 

[Jordan27]

Its worth noting that you can free up some power by reducing the number of bends in your system. A baffled backbox for example might have a constant cross sectional are for the gases to flow through the whole way through, but by convoluting the path you are causing the gases to have to keep changing direction. This requires force which is more work done by the engine eh

I do have a Peter Lloyd backbox somewhere but it's been cut so maybe with the help of a welder(don't have one yet!) I can get that on too! It's the middle pipe that's the problem, that still on the rally car.


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[Enuo]

Middle silencer is straight through no?

 

[Jordan27]

Middle silencer is straight through no?

Yep it is


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