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Fufflenarnia



Member Since: 15 Feb 2020
Location: Redhill Surrey
Posts: 12

United Kingdom 1991 Defender 90 V8 Petrol HT Auto Baltic Blue

It looks great.

Thinking out loud, it seems all the options only have a 2" or 2.5" single pipe, is that enough? It just seems a bit small...

Post #831538 17th May 2020 11:15am
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Inigo



Member Since: 13 Nov 2011
Location: Kent
Posts: 550

United Kingdom 2012 Defender 110 Puma 2.2 USW Orkney Grey

I've got a 3" exhaust on mine and it is a bit loud, probably too loud (MOT advisory last time)

Post #831573 17th May 2020 2:03pm
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Fufflenarnia



Member Since: 15 Feb 2020
Location: Redhill Surrey
Posts: 12

United Kingdom 1991 Defender 90 V8 Petrol HT Auto Baltic Blue

I like the idea to twin exhausts, I'm considering adapting a p38 system.

I guess flow rate idnt that significant as we want torque rather than hp, but it must improve flow.

Did you notice the difference when you went 3"?

Post #831576 17th May 2020 2:18pm
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Inigo



Member Since: 13 Nov 2011
Location: Kent
Posts: 550

United Kingdom 2012 Defender 110 Puma 2.2 USW Orkney Grey

Yes, it sings at above 4000 rpom, but is a bit sluggish below that. I should have perhaps stayed with the 2.5" system I had previously, but I upgraded to John Eales Dakar manifolds at the same time.

I toyed with the idea of twin exhausts and adding an exhaust valve like the F-type so that the second exhaust was only used when full throttle. Vacuum operated exhaust valves were available from Ferraris on ebay, but I didn't have easily accessible vacuum manifold to operate them.

Cheapo chinese knock offs now available on ebay: https://www.ebay.co.uk/itm/Car-2-5inch-Exh...SwB21es4iB



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Post #831638 17th May 2020 7:35pm
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Fufflenarnia



Member Since: 15 Feb 2020
Location: Redhill Surrey
Posts: 12

United Kingdom 1991 Defender 90 V8 Petrol HT Auto Baltic Blue

That's a very interesting thought, and a good insight.

There are a few options for valves including using one of these:
https://www.ebay.co.uk/itm/113559212594

Great food for thought, thanks.

Post #831643 17th May 2020 7:58pm
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Fufflenarnia



Member Since: 15 Feb 2020
Location: Redhill Surrey
Posts: 12

United Kingdom 1991 Defender 90 V8 Petrol HT Auto Baltic Blue

That's a very interesting thought, and a good insight.

There are a few options for valves including using one of these:
https://www.ebay.co.uk/itm/113559212594

Great food for thought, thanks.

Post #831644 17th May 2020 7:58pm
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