Tullet manifolds

[macky17]

I could have added this to the other thread but didn't want to hijack it.

Has anyone else noticed any change to exhaust note after having Tullets fitted to replace oem manifolds? I ask as since having my front manifold changed at Jetstream the other week, my exhaust sounds much throatier with more pops and grumbles than ever before on a trailing throttle, especially once warmed up. Or do I have an issue somewhere? I thought the Tullets were exactly the same spec just reinforced and hence would sound exactly the same...

[macky17]

The gaskets are brand new so shouldn't be that (rear was done last year).

The old manifold was in a bad way so that's plausible. I've reset the adaptives to no effect so perhaps a tweak from Trevor is in order...

Thanks folks.

[macky17]

Blu3R said:

So not brand new then...

Never assume, always check! A bolt came loose on my rear turbo which caused my 'brand new' gasket to blow a hole in the side. That was only 1,000 miles old.

Ahh. OK, point taken. Surely your symptoms were more extreme than mine though?

Both turbo gaskets were only replaced a few weeks ago but it could be the rear exhaust manifold gasket I guess. Perhaps I need to have this investigated a little further. How much labour time should be involved?

Edited by macky17 on Tuesday 29th November 17:06

[macky17]

Blu3R said:

macky17 said:

Blu3R said:

So not brand new then...

Never assume, always check! A bolt came loose on my rear turbo which caused my 'brand new' gasket to blow a hole in the side. That was only 1,000 miles old.

Ahh. OK, point taken. Surely your symptoms were more extreme than mine though?

Both turbo gaskets were only replaced a few weeks ago but it could be the rear exhaust manifold gasket I guess. Perhaps I need to have this investigated a little further. How much labour time should be involved?

Edited by macky17 on Tuesday 29th November 17:06

To be honest Niall you could identify a large leak from the rear manifold with your hand in about 30 seconds. Just start her up from cold and have a feel around for air escaping.
I'm not saying this is definitely your problem but it's certainly possible. You can also look around with a torch to check for any telltale soot marks, indicating a leak too.

Definitely nothing that pronounced. What did your holed turbo gasket sound like?

[macky17]

Blu3R said:

The escaping air sounded like a normal exhaust blow but the feeling was boost building slower and loss of absolute power on WOT plus more pops on overrun (which ironically I quite liked!).

Since the turbos were rebuilt the thing has been tearing my face off so it's not that then

[macky17]

TuxMan said:

You need a pair of these

Shiny

Question: does a noble completely stop burning fuel on the overrun like a very modern car or is there still fuel being supplied?

[macky17]

macky17 said:

Question: does a noble completely stop burning fuel on the overrun like a very modern car or is there still fuel being supplied?

Nobody?

[macky17]

Thanks folks. Yes he's defo mapped mine that way