Ecoboost, twirly things in the intake pipes
06-10-2014, 11:41 AM
#391
You got it right. Yes you need a tuner for catless because of the check engine light but not for the catted. I don't know if the catted would be louder but I would assume it would be. Just not as loud as catless.
03-18-2015, 12:33 PM
#392
Junior Member
Swirl Vanes (Real Purpose)
Found something on another internet forum, not sure what their source is:
They actually designed in some vortex generators in the inlet ducting to help the turbos. I wouldn't take these out, no matter what your drunk cousin says is a flow restriction. Max boost by 1500 RPM is no cake walk and these parts help. If you look closely, you see those lines halfway down the blade? That's some F1 work right there. Optimizing aerodynamic flow to help boundary layer separation. Bottom-line: There's tons of work that has gone in to make these trucks perform.
They actually designed in some vortex generators in the inlet ducting to help the turbos. I wouldn't take these out, no matter what your drunk cousin says is a flow restriction. Max boost by 1500 RPM is no cake walk and these parts help. If you look closely, you see those lines halfway down the blade? That's some F1 work right there. Optimizing aerodynamic flow to help boundary layer separation. Bottom-line: There's tons of work that has gone in to make these trucks perform.
The vanes purpose are for NVH prevention. "Noise Vibration Harmonics". That means they will quiet the air stream by creating a air pre-swirl condition to the turbo impeller. They also provide a minor increase in spool time at lower RPM ranges during initial acceleration. In addition reduce the turbulance on the incoming air (K coefficient).
Last edited by Platinum6756; 03-18-2015 at 12:53 PM.
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03-19-2015, 06:20 PM
#393
King Hater
I work for a company that produces these blow molded turbo ducts for both the 2.7L and 3.5L TT engines. We also assemble the swirl vanes as part of the sub-assembly provided to FORD (tier 1) among other welded bellow and cuffs to them. I was the production engineer that worked directly with FORD Dearborn. The swirl vanes in question are injection molded product. The ridges are used to de-mould the product out of the tool. The newer vanes lack these because of the parting line associated with de-moulding has changed.
The vanes purpose are for NVH prevention. "Noise Vibration Harmonics". That means they will quiet the air stream by creating a air pre-swirl condition to the turbo impeller. They also provide a minor increase in spool time at lower RPM ranges during initial acceleration. In addition reduce the turbulance on the incoming air (K coefficient).
The vanes purpose are for NVH prevention. "Noise Vibration Harmonics". That means they will quiet the air stream by creating a air pre-swirl condition to the turbo impeller. They also provide a minor increase in spool time at lower RPM ranges during initial acceleration. In addition reduce the turbulance on the incoming air (K coefficient).
04-13-2015, 02:09 PM
#394
Old thread. But had to point this out. Rifling does not increase velocity of a progectile. It slows it, especially when a faster twist rate is used. In my 6.8 spc ar15 there is a 1:11 twist rate. They changed to that from a 1:10 to reduce case pressure and increase the velocity by about 200 fps. Reason being with the slower twist rate they were able to increase the amount of powder in the cartridge therefore creating more power with the same amount of pressure. Rifles are a different animal. They rely on huge amounts of pressure to force that larger than bore diameter projectile down the barrel.
03-29-2019, 07:24 PM
#395
Ha, a REAL old thread.
I have a new 18' F150 3.5 ecoboost with 500 miles.
I ordered the AFE MF Stage 2 (3.5") Pro 5R, and just installed it.
I left the swirl generators out.
Took it for a drive, and throttle response was dead, alot of turbo lag.
Drove it back and reinstalled the swirl generators. Throttle response is back.
This goes against EVERYTHING I've ever learned regarding turbo engines (I know my 991 Porsche Turbo S doesn't have these damn things, and it hauls ***).
I'm not even convinced this bad *** CAI added anything.
I'll have MPT tune it after a few thousand miles when I'm convinced the engine is solid, though killing the engine warranty bothers me.
I have a new 18' F150 3.5 ecoboost with 500 miles.
I ordered the AFE MF Stage 2 (3.5") Pro 5R, and just installed it.
I left the swirl generators out.
Took it for a drive, and throttle response was dead, alot of turbo lag.
Drove it back and reinstalled the swirl generators. Throttle response is back.
This goes against EVERYTHING I've ever learned regarding turbo engines (I know my 991 Porsche Turbo S doesn't have these damn things, and it hauls ***).
I'm not even convinced this bad *** CAI added anything.
I'll have MPT tune it after a few thousand miles when I'm convinced the engine is solid, though killing the engine warranty bothers me.
