S4 exhaust manifold

[stevefh]

Hi all,    lotus exhaust manifold B910E2588K with reinforcing webs has lasted 15 years approximately 50k miles,now has two pea sized holes near each of the indentations for top fixing stud of cylinders 3 and 4 and good everywhere else. I would say the metal is thin in those spots and the likely place for yours to blow. I am considering buying another from SJ or the swlc spheradine graphite exhaust manifold.Does anyone have lengthy experience of the latter.I will take into account that the lotus one didn’t crack as the previous one did after 10 years .Thanks for any info

[Barrykearley]

I’ll leave this here.

[stevefh]

Hi Barry,availability and price inc.vat of the Alunox.Both sjs and swlc are advertised as £654 inc vat,I haven’t yet asked about availability .

[Bibs]

We might be doing a group buy on them again soon

[stevefh]

Thanks Bibs,last group buy price inc vat ,how long ago,how long is the guarantee for this S/steel version?Any problems with them?

[Barrykearley]

They ain’t cheap - but they make a huge difference 

[Giniw]

On what? Durability? Gas flow (doubtful as the turbo is restricting it anyway)?

Edited September 4, 2018 by Giniw

[Barrykearley]

These manifolds are proven on a dyno to add bhp. The spool up is significantly different.

dont underestimate the difference getting air in and out more freely makes to these engines

[Glyn Harper]

I’d be up for a group buy. I don’t need one at the moment, but I’d like one In stock for when I do, in case they’re not available at that time.

[ab2cv]

Very interested in a group buy. I need a manifold as my original is suffering from the usual failure....

[Giniw]

3 hours ago, Barrykearley said:

dont underestimate the difference getting air in and out more freely makes to these engines

Oh, trust me I don't, I really don't!

Please find attached a photo of my catalyst and silencer I took a few days ago
I did notice a subtle difference, indeed!

Edited September 4, 2018 by Giniw

[Escape]

Get it all out and then put it back, you'll definitely feel the difference! 😎

[Glyn Harper]

Catalytic converters are for girls and hippies. 😎

[Barrykearley]

And the scrap pile 👍

[mr.oogieboogie]

Or get one made

 

[stevefh]

Hi Peter, what is it made of,who makes it and what does it cost?

[Barrykearley]

If you get one made - go along the lines of the alunox ones. I can’t describe the difference it makes to the car

[mr.oogieboogie]

I had this made a few years ago. Big thank you to Dr Hess who gave me the info to make it.  It was not cheap around  £950 Full stainless and welded by a rolls Royce jet engine guy.

The guys who made it also made the rest of the exhaust with a fast flow cat from a noble

And the rear silencer box that's small and hidden by the rear diffuser 

Had it designed so it could be unbolted from the turbo and removed without disturbing the rest of the exhaust so no studs holding on the turbo. Also no need to remove the rear engine mount either. As it's sits closer  to the block. 

Been on the car for several years now with no issues.

[qwerty123]

Curious, approximately how much is one of these going to cost and Barry can you describe what advantages it gives?

[Barrykearley]

@qwerty123 not cheap - my missus will tell you about £35!

about a grand premium on a replacement cast unit which won’t last much more than 5 years in normal decent use.

it really makes the car breathe better. Turbo pickup is earlier and much smoother and swifter. The difference is very noticeable. Think it has been proven by others to add upto 30bhp on a dyno run - but not sure how much I’d hang my hat on that. The difference is very very noticeable and worth the investment imho

[Giniw]

1 hour ago, Barrykearley said:

my missus will tell you about £35!

Would you give me her email so I can ask her if she has any Esprit spare parts for sale?

[lotusing]

I would be interested in a group buy, very!!