Jam ecu!
- Thread starter Sigma
- Start date
The_Notorious_C_A_T
Lifer
What are these capable of?
Quite alot, depends on the spec though, heard of 1 bar on a td04. Self trimming to afr targets.
Remapable?
No
What will it be mapped too currently?
Ask previous owner, usually can't tell tbh
Most of this has been covered in previous topics.
I had one but had to sell due to not being able to work with my spec unfortunately, although was awesome on my pretty much standard car.
Quite alot, depends on the spec though, heard of 1 bar on a td04. Self trimming to afr targets.
Remapable?
No
What will it be mapped too currently?
Ask previous owner, usually can't tell tbh
Most of this has been covered in previous topics.
I had one but had to sell due to not being able to work with my spec unfortunately, although was awesome on my pretty much standard car.
I agree as I bought cats jam ecu and it's doing a fine job no more fuel cut and car now goes like a whippet with a wasp up it's ass lol which reminds me I must get that manifold on soon
Guye
Lifer
These unit basically remove the preformance limiters found on the stock unit to increase the potential of the stock 4efte. One weak point of the ct9 is it's lack of top end power, the Jam ecu allows for more agressive timing (around the 5000rpm mark) to compensate for that, while raising the rpm limit to around 8000-8200rpm. The stock injector duty cycles % are increase while removing the stock boost fuel cut limit, allowing for safe fueling with stock componets at higher boost levels/larger turbines. The 180kmph speedcut is also removed. As for the self trimming/learning feature...the stock ecu's maps are still being utilized in this unit, maps which allows the engine to run on 100ron or 85ron fuel, in different climates and conditions. The jam ecu simply uses the information from the engine's sensors to find a safe map depending on the upgrades or changes done (within a reasonable limit) while still removing the restrictions for the stock unit. Because this unit carries only a 16bit processor, these changes are not instant, but take place after some kms of driving and the new signal inputs form the sensors are registered. That why uses of these ecus will also notice the fueling/timing/idle are corrected when boost is increased or a hybrid or td04 is fitted instead of the ct9.
i'm pretty sure its the same as my blitz access which works using a method called fuzzy logic, the best way to learn about what it does is google fuzzy logic.
Basically if your in a shower and its too hot then you turn the cold up a bit until it suits, well these ecus act in a similar way with fueling and timing.if you stick your foot down it adjusts fueling and timing for quicker pick up and better power delivery.
Alot of people say these can only "learn" to a certain extent but they dont actually learn new mods at all the only adjust the parameters to suit whats going on (using fuzzy logic).
I would be interested to see how 1 would cope with a td05 as i'm pretty sure it could.
I do refer to the blitz but as i say i'm sure its the same idea.
Alan
Basically if your in a shower and its too hot then you turn the cold up a bit until it suits, well these ecus act in a similar way with fueling and timing.if you stick your foot down it adjusts fueling and timing for quicker pick up and better power delivery.
Alot of people say these can only "learn" to a certain extent but they dont actually learn new mods at all the only adjust the parameters to suit whats going on (using fuzzy logic).
I would be interested to see how 1 would cope with a td05 as i'm pretty sure it could.
I do refer to the blitz but as i say i'm sure its the same idea.
Alan
Guye
Lifer
The blitz, TRD, Jam and Mines ecus all work on the same priciple Alan. They take the exsisting maps and settings from toyota (which uses sensor inputs/fuzzy logic) and remove the limitations on them. One e.g...if the stock ecu only allows a max duty cycle of 60% on the 295cc stock injectors, these aftermarket unit can allow up to 80-88% in some cases. Raising this limit allows for safe (if not a bit rich) afr's on higher boost levels and larger turbines (up to a reasonable extent) where stock alone would have struggled without changing the stock components.
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Chris@CCM
Member +
its a ecu with a chip in it i dont beleve there self learing at all as some of them ive seen run silly rich tho some run ok bit pot luck tho . i know some one thats had a wideband in the car for along time and has reset the ecu a few times the afrs dont change at all over time so imo they dont self learn
dac69er
Super Moderator
thats no proof though. if the afr's are about right then there would be no changes made by the ecu, if thats how it works.
i dont know how it works myself and am not going to speculate. all i can say is that you definitely notice a difference after a few hundred miles after installing/resetting the ecu.
Guye
Lifer
While this may be true in some cases, myself and another local member Gorganl actually both saw increased fuel efficiency after switching to Jam racing ecus. As for the original tune, my unit has compensated beautifully for so many changes I've made to my setting/components, I often wonder if the original tune per specs is the final law with these ecus or do the delimited stock maps take over based on sensor input....would make for interesting discussion.
Chris@CCM
Member +
thats the ting its was silly rich ive worked with them be for hand were they have been so rich the car was misfiring coming on boost. is 9to1AFR ok in any ones book ? lol
Yeah, I was agreeing you with you Guye, I had one on my glanza for a period of time and couldnt fault it.. I was just going on what other people have said in the past about some running too rich.
In reality they are very clever units, wether the people who favour piggybacks will agree or not.
For a small techtom chip to run the whole show is pretty impressive (basically it only reads the ecu's map, it itself sends the altered signals back)
In reality they are very clever units, wether the people who favour piggybacks will agree or not.
For a small techtom chip to run the whole show is pretty impressive (basically it only reads the ecu's map, it itself sends the altered signals back)
Guye
Lifer
It has a complete secondary daughter board fitted with it's own processor...a bit more than just a chip....
dac69er
Super Moderator
that is fair enough. all i can go buy is my own experience.
you reset the stock ecu, run for a few hundred miles and it still drives the same.
you reset my jam ecu, run a few hundred miles and you definitely notice it drives different. power doesnt seem so flat.
i dont know what its doing as i have never monitored it, but its definitely adjusting itself to some degree.
Guye
Lifer
Spot on. Since Toyota obviously invested heavy resources to make sure the car will start and perform in a large variety of conditions, using the stock maps only makes sense. Using the stock sensors and engine components but still taking away the stock limits on those maps is where the increased output is realized. But these ecu makers also invested alot into making sure the unit do this in a safe but meaningful way.
Guye
Lifer
I've always wondered...I've seen mods listing a "Jam racing chip" or "Jam racing ecu". Is there a difference? The jam ecu that was shown opened on the old site showed a seperate daughter board fitted in the stock ecu housing and resealed/labeled. Is there a jam performance option where there is just a chip inserted to the stock board only? I'm curious...
Has there ever been any proof the ecu's are actually..'mapped' to the car, and not just a pre selection of 'standard / lightly modified' or 'modified'
I mean, i stumbled accross japanese mailorder site 3 years ago that you could order the TOM's ecu's, there was no mention of getting it mapped.
EDIT: I doubt it Guye, there is no way to change the ecu's values so the chip simply wouldnt work.
I mean, i stumbled accross japanese mailorder site 3 years ago that you could order the TOM's ecu's, there was no mention of getting it mapped.
EDIT: I doubt it Guye, there is no way to change the ecu's values so the chip simply wouldnt work.