• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
RAM air flaps control
#11
I have been confused since the first post on this subject. Somebody tell me what I'm missin. Since rompin on then gas opens the flaps, that tells me that vacuum opens the flaps. Vacuum increases at higher rpm, right? So wouldn't you need a constant vacuum source to "pull" the flaps open at all times?
  Reply
#12
(01-12-2017, 10:28 PM)andy72 Wrote: I have been confused since the first post on this subject. Somebody tell me what I'm missin. Since rompin on then gas opens the flaps, that tells me that vacuum opens the flaps. Vacuum increases at higher rpm, right? So wouldn't you need a constant vacuum source to "pull" the flaps open at all times?
The flaps are normally open when no vacuum. When there is vacuum they close. A no vacuum condition exists when you stomp on the gas. So if you want to keep them manually open you need to cut the vacuum. Hence the vacuum switch to cut the vavuum off.

1971 M-code Mach 1

        [Image: 20160929_171923_edit2_small.jpg]

1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump
Strange center section with Truetrac, 3.5 gear and 31 spline axles, 4-wheel disc brakes
  Reply
#13
Just some thoughts here. I have read some articles about the benefits of the Ram Air system and the HP gains are negligible. Maybe if you are doing 150+ mph would you start seeing any gains. it is more of a cool factor than anything else. Those flapper valves are so far back that you really can't see them operate anyway unless you are bent over looking into the duct and there's someone else gunning the motor. That being said I did make the Ram Air functional during my resto project because I had the hood anyway and it wasn't available on a Q code motor and I thought it was cool too. Not sure if I would go through the trouble of making it manually operable with a solenoid though. It would be great to see how it works though :-)

There is another option to make this work. The air grabber hood on the early Dodge cars used a mechanical vacuum switch on the dash to operate the Air Grabber door. These parts are reproduced and it would be easy to adapt to the Mustang Ram Air system. A good place to mount the switch would be in the center console ashtray if you have the console, that way you would not need to modify the dash. I removed the ashtray and made a plate to cover the hole and mounted some switches on it and the ashtray sliding door covers them so you don't know that they are there. You could also do that with the vacuum switch.

I always enjoy seeing how everyone personalize their cars and the solutions/designs that are created to make things work.

-john
(jbojo)
351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,
C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

Some Mod pictures can be seen at:

  Reply
#14
Something I've always wondered about in regards to the flappers. Is there any different tuning on the engine that would need to be done to take advantage of the extra air flowing in? Or would more air plus WOT more gas, be more power?
  Reply
#15
You would need to make sure there is enough fuel going through the carburetor via main and secondary jets and power valve. The combination of cooler (denser) air and supposedly faster air flow could lean out the engine if not set up correctly. You would also need to make sure the total timing was set correctly.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#16
EFI should be able to handle some of this adjustment, or not?

1971 M-code Mach 1

        [Image: 20160929_171923_edit2_small.jpg]

1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump
Strange center section with Truetrac, 3.5 gear and 31 spline axles, 4-wheel disc brakes
  Reply
#17
Yes, especially with a self learning system that uses a wide-band O2 sensor. Systems that rely on fuel mapping, whether or not used with an O2 sensor, may not be able to make enough adjustments on the fly.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#18
I should have the efi and the solenoid going by this summer. I will let you guys know if the tires start spining after flipping the switch at 70 MPH

1971 M-code Mach 1

        [Image: 20160929_171923_edit2_small.jpg]

1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump
Strange center section with Truetrac, 3.5 gear and 31 spline axles, 4-wheel disc brakes
  Reply
#19
That'll be interesting to see if the ram air does or does not make a seat of the pants difference.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#20
Don C;287868 Wrote:You would need to make sure there is enough fuel going through the carburetor via main and secondary jets and power valve. The combination of cooler (denser) air and supposedly faster air flow could lean out the engine if not set up correctly. You would also need to make sure the total timing was set correctly.

Thanks don! So it sounds like if the car came with the ram air system from the factory then the carb would be rejetted and adjusted to accommodate that. Could the ram-air carb be attached to another Mach without the ram air or would someone need to be aware of what type of setup the carb was coming from (ram-air car vs non ram-air car)?

Thanks!
  Reply
Share Thread:  


Possibly Related Threads…
Thread Author Replies Views Last Post
  Vapor Canister Connection to Edelbrock Air Cleaner Housingh GeorgeHC 2 168 06-29-2019, 12:07 AM
Last Post: GeorgeHC
  Air Cleaner Fittings cheezsnake 10 573 05-31-2019, 08:13 AM
Last Post: Stanglover
  Air cleaner question JohnnyJ 10 626 04-27-2019, 01:11 PM
Last Post: JohnnyJ
  Intake sucking air and not in a good way! scgamecock 15 532 03-24-2019, 10:47 AM
Last Post: scgamecock
  RAM AIR - manifold and distributor dfayette 6 444 03-10-2019, 12:48 PM
Last Post: jpaz
  Ram Air Kit Jean-Pierre 4 427 02-26-2019, 10:29 PM
Last Post: Jean-Pierre
  Air Conditioner Compressor - how to know if it has freon or not? crzyfun 3 460 11-24-2018, 09:40 AM
Last Post: Carolina_Mountain_Mustangs
runninpony Air Cleaner Clip NOT A T5 11 788 09-18-2018, 05:01 PM
Last Post: NOT A T5



Users browsing this thread: 1 Guest(s)