Intake boot collapse - video

[Wwabbit]

I had been chasing a hesitation and power loss that occurred reliably in the 4000-5000rpm range on a good dig. I mistakenly assumed it was either plugs or a jiggery fuel pump relay. So I eliminated those ((( by the way, everybody has a couple of spare fuel pump relays - they are otherwise known as the wiper relays and they are stored right beside the fuel pump relays - most owner's wiper relays are virtually new and can be a convenient way to test your existing fuel pump relay))) Back to my story, so this weekend I was changing out my halfshaft bolts and I had the air box off and noticed how floppy the intake boot was. Pretty wimpy. I found myself wondering just how much suction there must be on the intake side at high boost, then the light came on - yep I was running a 2.9" pulley and I recalled the previous posts on the subject. I'm a bit slow on the uptake sometimes I guess.

So I dug out a GoPro and stuck it under the clamshell and, here's what it look's like in case you were wondering.... See you later, gotta call Accufab.

[BlackICE]

Great video!

I while you are at it I would check the condition of your air filters. Unless you find your air filters are dirty (hard to really tell if they are clean), IMO this is proof that the airbox and or maf is restrictive enough to cause a HP loss.

[otis]

Wow! Awesome.

otis

[FBA]

LOL - good thing I installed the Accufab intake sleeve support when I added the Whipple 4.0 L today!

[Indy GT]

Very telling video.
I would have thought the flexure of the inlet hose to be minimal, but data (ie video) clearly shows differently.
Thanks for the investigative results!

[MNJason]

Wow!! Would this be a concern on stock GTs (ie no upgraded pulley) as well?

[FENZO]

That literally sucks and figuratively blows. Thanks for sharing.

[soroush]

That literally sucks and figuratively blows. Thanks for sharing.

good one!

great footage! thanks for sharing

[Fubar]

Awesome video, for someone who claims to be slow on the uptake, you are the first one smart enough to put a GoPro back there. Great idea! The advice about air filters is also important. Moderately dirty air filters can cause problems. Some versions of the Ford Filters (depends on who the supplier was at the time) have been known to be pulled apart and sucked into the intake. I’m pretty sure the new filters are okay. It would hurt to call Rich and Dennis to get their upgraded intake system too… it’s ****ton better than the stock setup.

[nota4re]

While the Accufab support (also orderable through our website) would mitigate the boot collapse, the fact that you have some much vacuum between the air filters and the throttle body points to additional restrictions that you will want to look into. Simply stated, the motor wants a whole lot more air than it is able to consume with the current set-up.