EBC External Wastegate Flutter
Morning People!
I've since had my boost turned up to 24psi using the DIYautotune EBC (https://www.diyautotune.com/product/...-solenoid-kit/) all is well. But I'm getting Wastegate flutter noise. Dimitris (MSLABS) has advised to play with the EBC frequency. which I'm going to have a little play with later. Thanks for the advise Dimitris :bigtu: I understand this is normal due to the EBC working. But god does it sound ugly and i be great to reduce if not remove the flutter. Just wondering if anyone has had similar experience and had a fix. (I'm hoping changing the frequency will. But thought I still see if anyone else had this issue) |
Little update.
It was the EBC. As it's a on / off motion. it was causing the EWG to flutter. Changing the HZ slowed it down or made it faster depending on which way I went. I'm going to fit a N75 valve as they run quite high HZ so much faster on/off motion to prevent the flutter. For the time being I've gone back to a MBC which is working perfectly with zero problems or odd noises. |
Lawone,
Were you able to determine the maximum operating frequency and usable duty cycle range for the N75 valve? I have the same issue on a TD04HL with a log manifold and Tial 38mm using a 4 port EBC configuration. MAP is stable at 20hz+ because the intake system volume damps the pulses but the acceleration/deceleration of the turbine sounds horrible at even 40hz. Thanks! |
I ended up just running a manual boost controller. Which was simple and worked for what I needed.
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Originally Posted by Lawone
(Post 1451723)
I ended up just running a manual boost controller. Which was simple and worked for what I needed.
Constraints:
https://cimg4.ibsrv.net/gimg/www.mia...e65ffe683e.png |
Update to this - my flutter problem was related to leaks at the wastegate mount and turbine to manifold that developed at high temperature. The wastegate action was audible because of the leak. I since welded these joints (in addition to large inconel fasteners) and no longer have the problem. The charts above are still valid for MAP vs EBC duty.
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