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A/T ecu on M/T levin
Topic Started: Oct 26 2009, 04:15 PM (753 Views)
JDM
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AE111
why do people do this?

what advantages does it have (if any) ?

thanks ;)
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joyce
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Levin-it-up
I have an A/T ecu in my manual bzr and it makes a big difference.

It fuels the car for an automatic, which i believe gives it a better fuel air ratio and hence more power

Im open to corection on this!
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BZ-G
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aka Hyper Rev 4...
well reason why i'm using A/T ecu on a M/T transmission is my car was originally auto (did a conversion) and didn't want to get a M/T ecu as i always thought about getting a standalone ecu (better save up the money to get 1 proper ecu than spending on 2 ecu's) but never got around doing it... so kinda left it this way ever since...
also the mechanic who did my conversion said that the A/T ecu wouldn't affect the performance of the transmission, so i guess i wasn't worried about it and when doing a dyno test, the result seemed unaffected so it didn't bother me, at least i didn't lose power...
but other than that, i'm not sure if it's the engine itself or the transmission or the A/T ecu, but the performance of my car has been pretty well set up since acceleration is pretty good and as joyce said in my other topic about my car, the A/T ecu seems to have a different setting which somehow makes the it run better too?!?!... although power readings are very similar...
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meg_omen
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Stage 5
same as BZG... still using the AT ecu even after 5spd manual conversion...
i've tested 6spd BZR ecu, but revert back to AT coz I found that the VVT activate faster with AT...
probably coz of different load... :idk:
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joyce
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Levin-it-up
I also found a lad selling A/T ecu's in japan on ebay or yahoo auctions claiming big increases in bhp
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1i1
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NZ Toyota Parts Guy

AceSniper
Oct 27 2009, 04:51 AM
Iv read/herd the 6speed ecu drops timing to be "nicer" on the box dono how true that is.
Read something along those lines about the Toms ECU.

Found it:
Here


TOMSrolla:
I just got a TOM'S TEC ECU from a 1997 4AGE 20V Blacktop 5-speed engine, can I hook it up to my 1999 20V Blacktop w/ C160 tranny ?

I have this info on the 6-speed OEM ECU that i am using at the moment.....

6-Speed Manual ECU Box*

The ECU # 89661-1A860 is for the C-160 6 speed equipped AE111 which are compatible with 5 speeds as well, but mated with 6 speed transmission outputs, it has premature rev cut points in 1st and 6th gear and slightly changed timing curves for a split second after lift throttle and re-application to ease and protect the 6 speed's synchronizer and reduce driveline lash.


will it damage the the 6-speed gearbox in the long run ?

Thanks

4E-FTE:
Yes, and no. Depends how you drive... The TOM'S removes the shift-interrupt of the stock ECU. So do it at your own risk.
Edited by 1i1, Oct 27 2009, 11:53 PM.
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ciscobear
Stage 2
sounds like horsegoop......I have in an AT ECU right now cuz my manual one the capacitors went south on me....

I found the car pulled nice but again I don't know how long my manual ECU was failing, the car duz idle just a tad bit lower with the AT ECU but it feels all the same really......

I've heard claims from higher revs to more power.......all nonsense in my view

I've just ordered a replacement MT ECU........
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lombard0
Stage 1
Mine is also an AT ECU with manual tranny. I have heard that A/F mixture is a little bit richer on the AT ECU but haven't verified on this.

Cheers!
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spooj
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Stage 3
4E-FTE posted this onwheels jamaica afte doing alot of homework it seems

"Problem number two is running rich. Using the throttles externally creates a MASSIVE change in the air flow into the engine. So much airflow in fact that the car will respond with an equally ridiculous amount of fuel. However, this behaviour seems to be minimized to those using the automatic ECU. Several cars using the horns/auto AE111 20v ECU combination seem to have rock soild performance gains from the horns without the reduction that the manual ECU seems to exhibit. Then again I have noticed that the autoECU maintains a more stable a/f ratio than the manual ECU."


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The Parrot


over on wheels jamacia they did a conversion on a guys car. on the dyno the manuel ecu put out 5 - 10 bhp more than the a/t but they did find that the a/t had better a/f.

from what they said the best is going with the m/t ecu.
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spooj
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Stage 3
do you know if that was with the plenum etc still on or with trumpets?
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The Parrot


i think with plenum still on. it just seems that tha manual ecu was far more aggresive in its mapping
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AceSniper
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Global Moderator

what do you call a better a/f? as the m/t ecu will run richer top end

Also ever though that a overfueling when running open throttles could be due to LESS air entering the engine causing it to run rich... Remember that Wide Open Throttle is a pre-set and is not affected via sensors.
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The Parrot


well the a/f was just more close to what was to be aimed for like a 12/13 to one were as the m/t wasnt as close but did make more power
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GNeve
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The flying Dutchman
Here is the answer of your (old) discussion
i test it for my self to see the difference.
same runway:
http://www.youtube.com/watch?v=3em6wVGGCnU

best regards Tyn
Edited by GNeve, Oct 10 2011, 05:27 PM.
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