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Russdaz

Member Since 11 Apr 2013
Offline Last Active Today, 11:05 AM
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Posts I've Made

In Topic: St Strange Noise (Video Included)

22 March 2015 - 10:37 PM

 

I watched those and the videos on turbos and variable geometry turbos, very interesting :). The stuff about exhaust manifold pressure kind of went over my head lol, but I can see how the twin scroll is designed to spool up faster at lower revs.

 

So it looks like a variable geometry turbo is best in terms of the overall boost, and the twin scroll reduces lag at the expense of high-RPM boost, is that correct?

Pretty much.. but what that video fails to mention is vgt are only really viable on desiels, as its crazy expensive to make vgt for petrol cars due to higher exhaust gas temps, which damages the vanes. Hence the use of conventional, twin scroll or sequential turbos (later being giving good spool times and higher rpm boost) being the main the stay on petrol engines. Porsche for example has used them, but  £2,000+  (x2) for a replacement turbo.. not really a viable option in most consumer applications. 


In Topic: St Strange Noise (Video Included)

22 March 2015 - 06:24 PM


 

Yeah that's good, it would have been better if Mountune did something like that for the MP215.

Yeah would.  But it would be a keeping the Ford warrentee thing,  as the extra 15bhp will be mainly a remap thing. 


In Topic: St Strange Noise (Video Included)

22 March 2015 - 05:57 PM

Phil,  the one from ggr like that has a carbon heat sheild to prevent heat soak. 


In Topic: St Strange Noise (Video Included)

22 March 2015 - 01:30 PM

Take a listen to this video. I so want that cone purely for that sound lol

 

https://youtu.be/SUKyoO2UmNM

 

<iframe width="560" height="315" src="https://www.youtube....creen></iframe>


In Topic: St Strange Noise (Video Included)

22 March 2015 - 01:20 PM

Sorry all i can hear in that video is the turbo spooling, then chattering as it dumps the not needed boost back into the intake system.. (they have a recirculating type valve)  Seems more noticeable on the St's then some cars.

 

Under heavy loads the sound will change to a more of pisst sound.

 

My new ST does the same, and is much more noticeable my old 1.0lt ecoboost.

 

The sound will be more noticeable on mountuned cars as the filter breathes more and allows more noise through it, plus its an extra hose to let even more turbo sounds out.