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(UPDATED 8-5-22) Whipple Supercharger Issue 2021 F150 5.0

powerboatr

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i would have throttle body last on the list.
your looking at that as you install.
you are saying the REPLACEMENT has been scuffed on the leading edge? vice being smooth?
interesting way to stop a whistle
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Confu11

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The supplier didn’t initially say what they were going to do but scuffing sort of marring the leading edge is what they did.

I haven’t spoke to them on why that would possibly work as a solution. But I’ll report back after I test it tomorrow.

It’s all very odd.
 

powerboatr

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that little bit of airflow disturbance might stop the noise you hear.
sort of like a mouse in a tailpipe to increase back pressure on turbine .. a very small piece of flat stock

will be watching to see or hear how it goes
 
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Confu11

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I will update tomorrow.
Thank you and everyone that’s been helping me w this nightmare.

I just wanted to have 7XX hp w/o any problems…lol!!
 
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Confu11

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Update!!

The squeal is substantially lower! I only drove it a mile but I would say it is 40% reduced.

Thank you for your suggestions and letting me know I was not just hearing things.

The pics again of the Stage 2 Throttle Body before and after the marring.

Plan of action is to get some more drivetime, take some video and send it back to the Throttle Body Manufacturer for another marring session.

Update to follow. Will not leaving you guys hanging.

Ford F-150 (UPDATED 8-5-22) Whipple Supercharger Issue 2021 F150 5.0 Before and After Blad
 

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Dave541

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Glad you’re making progress 👍
 

fordhouston

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Been going on 3 months of misery with a mind numbing high pitch "tweet" when the truck is just cruising at constant speed. ***It is not the Whipple whistle or whine.

Timeline:
Bone stock except for the V8 Stage 2 kit..lol

Mike (tech support) at Whipple says it's "Normal" intake noise.

My installer does not know what it is.

I took it to the Whipple authorized dealer here in the SF Bay Area he could not figure it out.

So I figured let me kick it down to a Stage 1, maybe the stock throttle body will work...nope it did not work.

It is not the belts or the Bypass valve either.

It sounds like it is coming from inside the intake manifold.

I do not know what to do at this point. I am frustrated...


Attached a couple videos for your ears to be disturbed.



driving in 4A on dry pavement isn’t smart Lol
 

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