 | Home > Puma (Tdci) > Whistle while you work... |
 
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| jbcollier Member Since: 29 Apr 2024 Location: Edmonton AB Posts: 73   
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2.4 TDCI with a larger intercooler, "improved" intake, CAT & EGR delete, otherwise stock exhaust.
Ran fine, not particularly noisy, not particularly quiet either. Did the Bell 150 hp remap. Very happy! Pulls well though you do have to watch the pyro when the engine is loaded, such is life. BUT, it now has a pronounced turbo whistle that comes in quite low rpm and throttle position-wise. It is actually a shrill shriek. It is quite pronounced. I can't find any signs of leaks and, here's the weird thing, it seems to be coming from the rear of the vehicle rather the engine area. Anyone have a similar experience? Is the stock exhaust potentially a bottle-neck that is causing the shriek? Sounds a bit crazy to me but it did start immediately after the remap. |
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12th Oct 2024 10:17pm |
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| andy63 Member Since: 30 Jun 2023 Location: north east Posts: 511 
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I remember having a transit that used to whistle under acceleration if I remember correctly.. never ever found anything wrong as such and it did stop over a period of months...
I think if you have gone to the trouble of improving your intake side , it makes sense to do the same on the output side...ie de restrict the exhaust..it improves the overall ability of the engine IMHO.. |
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13th Oct 2024 5:45am |
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| mwestcrew Member Since: 09 Dec 2019 Location: South Warwickshire Posts: 247 
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My first Puma (07) used to snap an exhaust manifold stud and then it whistled like crazy. You couldn’t see the leak just hear it. 2011 130 Utility Body
2005 110 Van |
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13th Oct 2024 8:28am |
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| wyvern Member Since: 13 Dec 2009 Location: Cornwall Posts: 2101 
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.... maybe check the fan belt tensioner ... ours made a shrill noise on accelration when the bearings were going
just a thought  Poppy - TDCI (Puma) 110XS 2.2 - Camper conversion - see the build here - https://www.defender2.net/forum/topic56530.html
Elgar -TDCI(Puma) 110XS Dormobile - now sold Devon & Cornwall 4x4 Response - DC126  |
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13th Oct 2024 8:37am |
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| Zed Member Since: 07 Oct 2017 Location: In the woods Posts: 3256 
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My turbo whistles, sighs and a whole lot more. I’ve changed the turbo gasket for Nakatanenga, checked everything else for leaks and now have just embraced the whistle. I’m not sure if my neighbours feel the same way though.. It sounds very different from a standard Puma, more like a Dakar race truck, but I just presumed that’s what happens when you modify for more power and a freely flowing system. WARNING.
This post may contain sarcasm. |
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13th Oct 2024 8:37am |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8009  
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my money is also here. plus what do you mean by watch the pyro? Cheers James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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13th Oct 2024 9:05am |
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| mwestcrew Member Since: 09 Dec 2019 Location: South Warwickshire Posts: 247
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My current vehicle sounds most uncharacteristic. Free flow air intake, big intercooler, 190 re-map, de-cat, 3 inch Demand engineering exhaust with just a small centre box. It’s not obnoxiously loud or anything but there is some distinct noise when coming off the boost. Induction also sounds quite different. 2011 130 Utility Body
2005 110 Van |
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13th Oct 2024 11:04am |
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| jbcollier Member Since: 29 Apr 2024 Location: Edmonton AB Posts: 73
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Good suggestions. I'll double check all the gaskets even though they show no signs of leaking.
"plus what do you mean by watch the pyro?" On steep, long hills, I'm adjusting the throttle back to keep the gauge reading under 1400F max. I can easily push the gauge to 1600F, maybe more. This is NOT at 50 mph, more like 70+ mph. On really steep hills, I can only maintain 60 mph while riding the gauge. Before the head gasket blew, and the head cracked, and before I fit the pyro and remapped it, I would romp up hills and fly down the highway at 85 mph, no problem. I actually remapped it because I was pretty sure someone had been in there before and I wanted a properly developed map rather than some "tuner's" dream. |
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13th Oct 2024 12:25pm |
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| Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 1988
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I believe the OP is referring to a Pyrometer Gauge (AKA - exhaust gas temperature gauge) that he has installed. More here https://drperformancerx.com/blogs/news/wha...STJ52WMEqy |
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13th Oct 2024 12:42pm |
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| lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 2734
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Just sell it and buy a 2.5N/A
No need to worry about turbo whistle then. ln fact no need to worry about anything. Although you'll have plenty of free time to daydream if you're doing a long journey in it. |
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13th Oct 2024 3:29pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8009
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Thank you, that explains it far better than me thinking pyrotechnics and smoke, flames exiting rhe exhaust! Cheers James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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13th Oct 2024 7:56pm |
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