They don't open or close based on speed. Vents are open until certain temperatures are met. What exact temperatures, I do not know.

 

thanks. I found that out later when I searched on the internet (google is your friend). I didn't know that our cars had the shutters until today. Found out a lot of interesting things about the aerodynamics that went into the S550 platform. Good stuff

 

We installed a Lethal Performance Grille Delete Kit and removed the shutters

They are pretty hideous once you remove the factory grilles IMO

It looks much cleaner without them installed. Not sure what the performance trade-offs are, but I'm sure our Panda Motorworks FMIC will keep our IAT's down

Nick C.

 

I removed my Active grills, now I have multiple check engine codes how do I fix?

 

The are actually not for cooling from what I read, but are for airflow across the nose of the car. Supposedly increasing the mileage at highway speeds by redirecting airflow out of the radiator/engine compartment.

 

This is what I thought they were for.

 

Yeah, MPG is the likely reason

Ours is a show car though, so that's not a major concern. For a DD, I imagine you may want to keep it.

It looks super ugly without the factory grille covering it up though IMO

Nick C.

 

Scroll down...read red print
2015 Ford Mustang Gets Grille Shutters To Improve MPGs
March 3rd, 2014 by Christopher DeMorro

Fuel economy never used to matter to muscle cars, but the 2015 Ford Mustang is a new breed with features like active grille shutters to boost MPGs. It’s one of many ideas designed to make the new Mustang both more aerodynamic and fuel efficient, a double boon for fans, even if they don’t realize it.

Active grille shutters are becoming quite popular within the industry as a means of improving aerodynamics on models across the lineup. The active grille shutters are especially important for the new 2.3 liter EcoBoost four-cylinder that the 2015 Mustang will debut with. This new engine requires additional cooling and atmospheric pressure because of the turbocharger, but takes up less space under the hood than the bigger V6 and V8 engine options.

This means a lot of open space behind the grille, which can cause a lot of underhood drag, reducing both fuel economy and performance. The active grille shutters allow air in when needed, but close off to increase aerodynamics when cooling demands are met, and will be employed by most Ford models, including the 2015 F-150. Even with these and other improvements though, like new placement for the sideview mirrors and “aero curtains” that draw air away from the wheel wells, Ford managed to make the 2015 Mustang 3% slippier, and about 1% more fuel efficient.

Sounds like a lot of work for small returns, but rumor has it the 2015 Mustang EcoBoost should be good for at least 35 MPG, and all told, a more aerodynamic Mustang also means a faster Mustang. It also leaves plenty of room for improvement from a diesel, hybrid, or even electric-poweredMustang sometime down the road.

It’s a win-win for Mustang fans, who save money and get to go faster thanks to a few new features nobody would have expected on a Mustang just a few years ago.

Source: The Detroit News

 

But I have noticed that when people are switching to the gt grill you have to remove the shutters.

 

since i went bigger intercoooler i decided to take mine out

 

If I keep mine and do a intercooler swap I will also pull them out

 

I'm leaving mine in place, computer showed 47 MPG at 65 mph on cruise today
Perry

 

I had no idea our cars did that!

 

Me either! I am averaging 24 miles right now. God only knows how bad it would have been it I had gotten the GT.

 

Me either! I am averaging 24 miles right now. God only knows how bad it would have been it I had gotten the GT.

Interesting stuff. I wondered if the Aero curtains had any useful purpose or if they were just a styling feature.

 

Has anyone noticed that our hoods shake a lot.almost like they want to fly open at speeds over 120mph?

 

A little shake over 110, but nothing like the ol' s197 hood shake.

Damn Bullitt looked like it was going to come apart.

 

Lol yes just a little shake ..nothing to crazy ...but definitely we're doing a little PMCS..making sure the hood catch bolts never back out..had a 2002 Toyota Celica the bolts got loose ..you would never know because of the plastic cover hid everything. .the hood along with the hood catch came apart about 80 mph on the 10 freeway..was a scary experience

 

i would like to put 2014 hood vents in to help cooling and air flow. Should help a lot with letting the heat off the turbo and allow the intercooler more flow.

 

Would also let rain/water in... I wouldn't recommend it.

 

Just curious about the water..I also wouldn't want a leak in the engine compartment. Does that mean you don't spray or rinse it either?

 

As long as it didn't drain directly on the CAI or air filter it should be ok. The GT's seem to have no issues with these vents.

 

Even my salesperson has heat extractors in his Stang and he tells me it's the worst thing ever if you get rain/snow... Especially with a CAI, he said he had to shake the filter out for 20 minutes. Sounds like nothing I want any part of... or you for that matter!

 

Sorry..did I say something wrong?

 

It all would go down to placement to avoid water getting into places where it would do harm.

 

I have not had any issues washing mine along as you don't have CAI ..and if you do just cover it with plastic bag and tape it closed so water does,not get it ..after I wash and rinse. .I'll use my air compressor or shoot even a high powered leaf blower will work to get the water out of the engine area..its funny you ever wonder how used car dealers get thoes engines looking so clean and new ? After they wash them the use tire foam over the entire engine to make it look shiny and new again.

 

I use Duplicolour tire shine, it makes hoses and plastics look new and shiny .
Dupli-Color TSCH100 Tire Shine Coating - 15.5 oz.

 

Ford put these in factory in 2014 on Gt's , with good planing I really think it would totally safe and would help the car cool off in warmer area's of the country. If you add more boost the temps will rise. Venting will allow the air to escape and allow more air to cool the intercooler and radiator . Lower AIT and Cylinder head temps is what i am trying to achieve to add power and reliability.

 

I just use the wax at the quarter-car wash. Works like a champ and lasts a long time!

I use the quarter car wash to do my engine -- I just make sure NOT to pull the trigger and go into high pressure mode. I will wet the engine down with the green engine cleaner while I am washing the car, then go back and "rinse" with the wax, and then use a spot free rinse.

I've never had an issue with this, even with a CAI filter.

 

Hi All, has anyone got their CEL on when they replaced their ecoboost front grille with the GT grille? You have to remove the active grille shutters in the process. I've read that on the Focus this throws off a soft fault and the CEL doesn't pop up. I can't believe the active grille shutters effects the emissions system on the mustang?? Thanks in advance

 

Cobb removed my grille shutters when installing their intercooler. I've never had a CEL. Not sure what they did. I'll ask Nick.

 

A CEL doesn't always mean it has anything to do with emissions. OBD stands On Board Diagnostics, the system keeps track of all kinds functions in the car.

Dave

 

Thanks Dave. I've discovered that the adaptive cruise control sensor was unplugged, so got that back on. I also removed the sensor unit from the actual shutter system to plug it in behind fender to see if that gets rid of the CEL. Those two tricks didn't seem to do it...would it need a reset? Thanks

 

The CEL will not clear itself once the fault is corrected until a predescribed number of key cycles. You could go to an AutoZone and have them read the code then clear it.

Dave