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Home > Maintenance & Modifications > Do all decat downpipes (TD5) sound the same?
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LandymanStefan



Member Since: 30 Aug 2017
Location: Surrey
Posts: 862

England 2001 Defender 90 Td5 SW Epsom Green
Interesting to see the results, this is similar to how I find it with mine between 60-70mph is the quietest, which is idea for those longer journeys. (With a 1.2 transfer box). I didn’t find driving between 1000-1700ish much different to stock.
Post #990087 23rd Apr 2023 6:39pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16895

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Quote:
how tight am I supposed to torque the U clamp bolts?





Tight enough but not too tight. Apply the old technique known as "common sense".
Post #990101 23rd Apr 2023 8:25pm
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fumiyasu



Member Since: 19 Jun 2015
Location: Oxon
Posts: 99

 1999 Defender 110 Td5 SW Santorini Black
Yes, it is quite interesting. I wonder if it really was by design as it's perfect for how I would want it, really very livable with.

Fair enough, it's on there now as "normal" tight but not "very" tight, so probably ok I guess. Rolling with laughter
Post #990108 23rd Apr 2023 8:50pm
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barbel jim



Member Since: 12 Dec 2012
Location: Northants
Posts: 1411

United Kingdom 2005 Defender 90 Td5 HT Tonga Green
fumiyasu wrote:


I was going to get the GTB450 as well but now decided to just get a hybrid


I’m quite privileged having had both! Been running the GTB450 nearly 2 years…. Awesome. I was unconvinced about the vnt until I had it. Yes the figures look similar however the drive is totally different. Having gone the vnt route I wouldn’t go back. It’s much more relaxing to drive, as gear changes become minimal. Fuel economy is also improved. To get the most out of the hybrid you have to Rev it and be in the right gear. I’ve also compared it to a mates highly tuned hybrid TD5, and I know which one is noticeably quicker Whistle it’s totally up to you, your money, but I’d have a go in both before I decided. I’m more than happy to take you out in mine if your ever this way. Thumbs Up
Post #990110 23rd Apr 2023 9:04pm
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murph81



Member Since: 11 Sep 2022
Location: Ireland
Posts: 63

Ireland 2007 Defender 110 Td5 PU Belize Green
We need a few videos with good audio!
Post #990127 24th Apr 2023 7:12am
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fumiyasu



Member Since: 19 Jun 2015
Location: Oxon
Posts: 99

 1999 Defender 110 Td5 SW Santorini Black
barbel jim wrote:
fumiyasu wrote:


I was going to get the GTB450 as well but now decided to just get a hybrid


I’m quite privileged having had both! Been running the GTB450 nearly 2 years…. Awesome. I was unconvinced about the vnt until I had it. Yes the figures look similar however the drive is totally different. Having gone the vnt route I wouldn’t go back. It’s much more relaxing to drive, as gear changes become minimal. Fuel economy is also improved. To get the most out of the hybrid you have to Rev it and be in the right gear. I’ve also compared it to a mates highly tuned hybrid TD5, and I know which one is noticeably quicker Whistle it’s totally up to you, your money, but I’d have a go in both before I decided. I’m more than happy to take you out in mine if your ever this way. Thumbs Up


I think I might have came across another post of yours when I was doing the research. Whereabout are you in Northamptonshire actually, might take you up on that if I am ever over.
Post #990212 24th Apr 2023 5:58pm
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barbel jim



Member Since: 12 Dec 2012
Location: Northants
Posts: 1411

United Kingdom 2005 Defender 90 Td5 HT Tonga Green
You have pm
And
https://www.defender2.net/forum/topic81212.html
Think that might be the link
Post #990220 24th Apr 2023 6:57pm
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fumiyasu



Member Since: 19 Jun 2015
Location: Oxon
Posts: 99

 1999 Defender 110 Td5 SW Santorini Black
Thought I would report back as I decided to bite the bullet and went for the GTB450 turbo from alive in the end.

The drive is obviously now awesome with much better power etc but a happy coincidence is that this seems to have completely resolved the droning as mentioned before which did happened at specific rpm.

I don't know if this is to do with the new turbo changing the resonance frequency of the system or if it's just the engine not struggling like before but overall my truck is actually now much quieter. So much so that my wife commented on this....

Just thought I would put it out there in case anyone needs to convince the other half on a new turbo.. Laughing
Post #1003903 12th Aug 2023 9:37pm
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andy2111



Member Since: 17 Oct 2021
Location: Kent
Posts: 365

United Kingdom 2002 Defender 110 Td5 HT Bonatti Grey
That's really interesting to hear, thanks for the update!

Going to have a serious think if I do mine now! TD5 hardtop to Puma inspired Poptop - my build thread

2002 110 TD5 Hardtop ¦ Full Puma interior ¦ Carpathian grey / Santorini black ¦ X-Vision-X poptop
Post #1003936 13th Aug 2023 9:36am
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fumiyasu



Member Since: 19 Jun 2015
Location: Oxon
Posts: 99

 1999 Defender 110 Td5 SW Santorini Black
Yes, definitely. I really can't say how happy I am now with this setup.

Power is way more than enough if you push it but as mentioned many times by other, because of the increase torque in the low end, you can drive it much more lazily which makes it much more comfortable which for me is the main thing.

Before this I was starting to have doubts on using it as a family car, was already looking at just making this a soft top for local drives and get something else for further away but this really changed the game for me.
Post #1004093 14th Aug 2023 4:46pm
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barbel jim



Member Since: 12 Dec 2012
Location: Northants
Posts: 1411

United Kingdom 2005 Defender 90 Td5 HT Tonga Green
Excellent Mr. Green
Post #1004103 14th Aug 2023 6:25pm
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