To decat or not to decat, that is my question

To decat or not to decat, that is my question

Author
Discussion

Let off some steam Bennett

Original Poster:

2,426 posts

172 months

Sunday 17th April 2016
quotequote all
ripskin said:
I bought my tuscan already decatted (longer header pipes) but with the standard rear cans, it was not a great sound until well on the throttle tbh, sounded muffled and puffy. So I sleeved the rear cans and OMG it sounds beautiful. nice and burbly at low revs but crazy when nailing the throttle. best mod so far and cost me 1 tenner and 1 hour in my lunch break smile
Does it get to loud on longer motorway runs

so called

9,092 posts

210 months

Sunday 17th April 2016
quotequote all
I drive to Germany and Spain each year and don't have a problem other than there isn't much in the way of conversation.
Don't listen to the radio either as that just adds to the general din.

We just have plenty of coffee and pee stops for a chat smile

BertieMagnus

33 posts

118 months

Sunday 17th April 2016
quotequote all
Let off some steam Bennett said:
Does it get to loud on longer motorway runs
I have exactly the same set up (decat & sleeved cans). Sounds ridiculously good on all throttle openings - and completely feral at the top end! Probably louder than I would have chosen myself, but that's how I bought it and I am not changing it.

Never too intrusive for me though on long journeys. Did 4000 miles around Europe the other year and not once did I wish for less noise. In fact I spent most of the time with the radio off and rear screen out just to enjoy it all the more through the mountains.

All a matter of preference at the end of the day of course.

Incidentally, mine will even legitimately go through it's MOT emissions test while decat as long as the engine has just been serviced, throttles balanced and is in good health.

e46m3c

874 posts

156 months

Sunday 17th April 2016
quotequote all
What are my options then chaps?

Just picked up the Tuscan. It appears to have sleeved standard cans which from what i read should be loud but they are not. I get some pops but its very subtle. Lovely noise but i bought the car to be shouty!

So should I next go for some powertech cans, or perhaps go for a decat first and then see.

Hard to tell if there is much difference between sleeved stock and powertec cans by internet reading.

Btw im after artillery.

Sagi Badger

590 posts

194 months

Sunday 17th April 2016
quotequote all


This is loud, with decats. Yet to sleeve the cans biggrin

J

m4tti

5,427 posts

156 months

Sunday 17th April 2016
quotequote all
e46m3c said:
What are my options then chaps?

Just picked up the Tuscan. It appears to have sleeved standard cans which from what i read should be loud but they are not. I get some pops but its very subtle. Lovely noise but i bought the car to be shouty!

So should I next go for some powertech cans, or perhaps go for a decat first and then see.

Hard to tell if there is much difference between sleeved stock and powertec cans by internet reading.

Btw im after artillery.
Shine a light down the cans, are they sleeved. If not sleave them. If you want to go further try Clive f decats

MrChips

3,264 posts

211 months

Sunday 17th April 2016
quotequote all
e46m3c said:
What are my options then chaps?

Just picked up the Tuscan. It appears to have sleeved standard cans which from what i read should be loud but they are not. I get some pops but its very subtle. Lovely noise but i bought the car to be shouty!

So should I next go for some powertech cans, or perhaps go for a decat first and then see.

Hard to tell if there is much difference between sleeved stock and powertec cans by internet reading.

Btw im after artillery.
If I remember rightly you're Berkshire based?
If so get yourself down to Peacock Farm on Tuesday for the Berks TVR meet and there'll be a few others to listen to.
You're welcome to pop over sometime and try my powertech cans just to see what they sound like as its only 2mins to swap them around.

My preference if you have the standard back boxes is for decat and sleeved std cans. I'm now on decat with act boxes and powertech cans and it's quite similar.

Andy_mr2sc

1,223 posts

177 months

Monday 18th April 2016
quotequote all
Sagi Badger said:


This is loud, with decats. Yet to sleeve the cans biggrin

J
Hi

Did you make up a hangar to support the pipe as per the standard box or are they ok as the pipe is lighter?

Andy

Flying Penguin

326 posts

160 months

Monday 18th April 2016
quotequote all
e46m3c said:
Btw im after artillery.
In that case, I presume you already know the answer wink

Even full sleeving won't do too much (other than adding further weight to the already heavy original cans).

Powertech cans are in a different league, both sound & weight- wise. For "artillery", you will definitely need a decat.

Remove the back boxes on top of that- and "Guns of Navarone" springs to mind.


Sagi Badger

590 posts

194 months

Monday 18th April 2016
quotequote all
Andy_mr2sc said:
Sagi Badger said:


This is loud, with decats. Yet to sleeve the cans biggrin

J
Hi

Did you make up a hangar to support the pipe as per the standard box or are they ok as the pipe is lighter?

Andy
Yep, made a hanger. Stainless flat bar, two of them at 90 degrees, welded together on the outside of the curve with the hanger cut off the box welded on. You need to as the weight of the can will twist it down/round otherwise.

J

Andy_mr2sc

1,223 posts

177 months

Tuesday 19th April 2016
quotequote all
Sagi Badger said:
Yep, made a hanger. Stainless flat bar, two of them at 90 degrees, welded together on the outside of the curve with the hanger cut off the box welded on. You need to as the weight of the can will twist it down/round otherwise.

J
Great thanks for the info. Did you notice any improved performance from removing the box or was it just the noise?

Whitey

2,508 posts

285 months

Tuesday 19th April 2016
quotequote all
Also a Tuscan S exhaust system being slightly wider bore than the standard or Red Rose exhaust has a deeper exhaust note.


e46m3c

874 posts

156 months

Tuesday 19th April 2016
quotequote all
Well. Sunshine and ebay is a dangerous thing.

Ordered some power tech cans.

Also booked a decat from racing green.

Clive F is around 250, RG can do them for 140? Not sure why the large price differece. Its just an empty pipe, cant imagine there is that much difference..

Powers advised a chip is good, Green advised a chip is not needed. Im going with not needed until deemed otherwise.

bring on the noise

m4tti

5,427 posts

156 months

Tuesday 19th April 2016
quotequote all
e46m3c said:
Well. Sunshine and ebay is a dangerous thing.

Ordered some power tech cans.

Also booked a decat from racing green.

Clive F is around 250, RG can do them for 140? Not sure why the large price differece. Its just an empty pipe, cant imagine there is that much difference..

Powers advised a chip is good, Green advised a chip is not needed. Im going with not needed until deemed otherwise.

bring on the noise
Yes there is. What you've ordered at that price is empty catalysts where the core has been knocked out. I can't remember which of the decat suppliers tested them, but the emptied cats flowed badly where the gases pass out the large aperture of the manifold into the wide chamber of the cat body and then need to squeeze out of the exhaust end exit which has virtually no transition to it diameter.

Let off some steam Bennett

Original Poster:

2,426 posts

172 months

Tuesday 19th April 2016
quotequote all
How do the ACT decats compare to the Clive F ones

simon-c

113 posts

258 months

Tuesday 19th April 2016
quotequote all
e46m3c said:
Well. Sunshine and ebay is a dangerous thing.

Ordered some power tech cans.

Also booked a decat from racing green.

Clive F is around 250, RG can do them for 140? Not sure why the large price differece. Its just an empty pipe, cant imagine there is that much difference..

Powers advised a chip is good, Green advised a chip is not needed. Im going with not needed until deemed otherwise.

bring on the noise
I'm making your cans in the morning, you'll have them on Thursday.

dvs_dave

8,676 posts

226 months

Wednesday 20th April 2016
quotequote all
After 10+ years of owning a Tuscan S I've settled with a decat and the factory cans. I have CCC's as well but it made the car obnoxiously loud with the decat. Fun for a while but it got old. Decat And standard cans is plenty loud enough, gets lots of pops and bangs and the odd pop of flame if you're lucky, but is a much bassier tone overall which I prefer. Sounds much beefier than the sharp tinny rasp you otherwise get. I also think the standard cans are the best looking too.

e46m3c

874 posts

156 months

Friday 22nd April 2016
quotequote all
Thanks Simon.

Cans fitted. Much more pops and bangs now but still a litle quiet for me smile

Should be getting some Clive F decats on the next batch smile

ripskin

66 posts

110 months

Friday 22nd April 2016
quotequote all
Let off some steam Bennett said:
Does it get to loud on longer motorway runs
No its not too bad, its only really loud when actually on the throttle, when cruising at 70-80 its not bad, can talk to passenger without a problem smile

ripskin

66 posts

110 months

Friday 22nd April 2016
quotequote all
e46m3c said:
What are my options then chaps?

Just picked up the Tuscan. It appears to have sleeved standard cans which from what i read should be loud but they are not. I get some pops but its very subtle. Lovely noise but i bought the car to be shouty!

So should I next go for some powertech cans, or perhaps go for a decat first and then see.

Hard to tell if there is much difference between sleeved stock and powertec cans by internet reading.

Btw im after artillery.
If your cans have now been sleeved and you have then next step would be decat, and then it really will put a smile on your face.

Edited by ripskin on Friday 22 April 10:33