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Topic: AOD vs 5 Speed computers.... (Read 1585 times) previous topic - next topic

AOD vs 5 Speed computers....

O.K.,I already know which AOD computers will work for my H.O engine.Now for the question,can you use a 5 speed computer with an AOD (speed density)?
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

AOD vs 5 Speed computers....

Reply #1 –
The difference between and auto and manual computer is how it handles "off throttle" situations.  An auto computer opens the IAC to keep the car from stalling when you are coming to a stop.  A 5 speed computer does not do this.  It does open the IAC for idle but its not enough to keep the load of the transmission from killing the engine when coming to a stop. 

Thats why they say you can use an auto ECU in a 5 speed.. bot not vice versa.
One 88
 

AOD vs 5 Speed computers....

Reply #2 –
Once again, Claude has impressed me with his masterness of the mechanical stuff...  go Claude!  You da man!
84 TC 302 -5.0L/t5/7.5 locking rear and a 3.45 gear, Edelbrock Intake, Aluminum Heads, Edlebrock 65mm Throttlebody, Edlebrock Cam, 24lb injectors & MAS Air Sensor calibrated via chip,  BBK headers, Catback H pipe, Magnaflow lers :evilgrin:
:pics-stfu:

 Project Thread with pics

AOD vs 5 Speed computers....

Reply #3 –
I had thought that you could use both computers with one of the trannies,but couldn't remember at all.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

AOD vs 5 Speed computers....

Reply #4 –
Dunno about speed density, but on Mass air either will work... In fact my Trick Flow headed/cammed 5.0 has far better drivaibility on the A9L 5 speed EEC than it ever had on the A9P or C3W Ford Motorsport EEC. The auto computers would buck at light throttle around 1500 RPM, does not happen with the A9L... As far as holding the idle up on decell, it performs same as a auto EEC...

I asked a local tuner about the differences and he stated the auto EECs have a more aggressive lean cruse mode(which he turns off), than the stick computer, otherwise are basically the same.

Of course this may not apply to a SD EEC, but I'm bettin' it does..

AOD vs 5 Speed computers....

Reply #5 –
Perhaps I'll throw the 5 speed computer in and just find out for science sake.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

AOD vs 5 Speed computers....

Reply #6 –
what the heck. Its easy enough to do. I think the auto ecu has a better air-fuel (fat,rich)setting. Works well with mods,cam,cold-air,timing (more).
1987 T-bird SportCoupe,302,5spd,8.8,3.27s,pbr brakes,spindles,2003 rear,18inch 06 gt rims!!!!:evilgrin:
2006 Gt Mustang,3v,5spd,8.8,3.55s,GT500rims.
1990 T-bird LX,3.8,aod,loaded,stock!!
1999 Trailblazer(wifes rig)

AOD vs 5 Speed computers....

Reply #7 –
I've had two vehicles converted to 5 speed and run off of auto ECU's.  Both of them ford speed density eec-iv.  When you rev the engine and let off the gas it wont just drop down to idle.  It hangs, this is kind of frustrating when shifting gears.  My truck had a 5 speed ECU option so I switched it out and the truck has much better road manners, but my cougar is stuck with the auto ecu.
One 88

AOD vs 5 Speed computers....

Reply #8 –
I'll instll the 5 sp computer later.I want to see how the car will react with it.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..