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Thread: Tuning a JWT ECU

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Posts: 1-10 of 13
2013-08-28 17:51:56
#1
Tuning a JWT ECU
Does anyone know if I can tune my JWT ECU with the Moates Ostrich 2, sold by Nismotronic? I realize a RT would be better, but I am just trying to use what I have.
2013-08-28 18:10:21
#2
Originally Posted by natethebrown
Does anyone know if I can tune my JWT ECU with the Moates Ostrich 2, sold by Nismotronic? I realize a RT would be better, but I am just trying to use what I have.


Pretty sure you can't. The pin design is different. You can do it with a Calum ECU but you would need two Ostriches, not one since there's 2 chips on the board. It's a way to convert a Calum Basic to a realtime.

-G
Last edited by gomba on 2013-08-28 at 18-11-46.
2013-08-29 00:04:37
#3
Man, that is really unfortunate. I am NOT in love with the JWT tune for my VE. Horrible MPG.
2013-08-29 00:11:44
#4
Get a safc to fine tune your ecu or just sell it. JWT is notorious for being very conservative and pig rich.
2013-08-29 00:37:18
#5
All you can do is adjust the static base timing via distributor or use a magic box to fiddle with air fuel ratios (such as Apexi S-AFC)

That being said, NEMU SA is better than any JWT I have used and i have used at least four different programs on three ECUs now. All "tuned" via the aforementioned methods on a dyno.

Thank you @JKTUNING and thank you @OnTheChip for the hardware, software, firmware and everything.
Last edited by Kyle on 2013-08-29 at 16-24-14.
2013-08-30 03:28:32
#6
I tried doing something like that once, fried my chip.
2013-09-02 17:39:29
#7
Unfortunately, you cannot use an ostrich emulator as it is a 28-pin emulator and the JWT chips are more like 32-34 pin chips.

If you need any other help with trying to get the car to run a bit better, shoot me a PM.
2013-09-02 21:43:09
#8
Originally Posted by natethebrown
Man, that is really unfortunate. I am NOT in love with the JWT tune for my VE. Horrible MPG.


I have done many VE cars with a JWT ECUs and they get from 33-36 MPG.

If you have bad MPGs it has nothing to do with the JWT tune. It has to do with a mistake you have made.

Generally when a car starts to get bad MPG you should look to see if you have a bad 02 sensor or the most common problem is that guys put in high flow - volume fuel pumps and they forget that when doing so you must put on a FPR to control the fuel pump if not the fuel pressure generally will be between 58-65 PSI. This causes about a 20% increase in fuel flow, which mean poor gas mileage and low HP numbers,

What a lot of people end up doing when they can not find their mistake is blame it on the ECU So now you go and get a programabe ECU that can now tune around your mistake because the tune is exclusive to your car.
Last edited by Andreas Miko on 2013-09-02 at 21-46-42.
2013-09-04 18:48:01
#9
Originally Posted by Andreas
Originally Posted by natethebrown
Man, that is really unfortunate. I am NOT in love with the JWT tune for my VE. Horrible MPG.


I have done many VE cars with a JWT ECUs and they get from 33-36 MPG.

If you have bad MPGs it has nothing to do with the JWT tune. It has to do with a mistake you have made.

Generally when a car starts to get bad MPG you should look to see if you have a bad 02 sensor or the most common problem is that guys put in high flow - volume fuel pumps and they forget that when doing so you must put on a FPR to control the fuel pump if not the fuel pressure generally will be between 58-65 PSI. This causes about a 20% increase in fuel flow, which mean poor gas mileage and low HP numbers,

What a lot of people end up doing when they can not find their mistake is blame it on the ECU So now you go and get a programabe ECU that can now tune around your mistake because the tune is exclusive to your car.



Yep, 34mpg cruising @ 70-75 on the way to this year's Convention. DE, though.
Last edited by hammerin hank on 2013-09-04 at 18-49-10.
2013-09-07 15:48:42
#10
The JWT board would need a 40 pin 16bit emulator and the ability to emulate a 1Mbit rom. In addition some address lines are mixed up and they appear to read alternately from the two halves of the chip upper and lower address space.

It is doable but not practical. Most likely very expensive if u had to get a 16 bit emulator. At the very least you would need to make a custom adapter from the 40 pin to 2 28 pin sockets, hardwired to unswap the swapped address lines and only address either the lower or upper address space, then u could use the moates emulators comfortably.

NEMU
or
a basic board and emulators.

That would be the way forward, and unless u had a use for two 8 bit rom emulators elsewhere, NEMU, no contest.

What Andreas says is true, the JWT tune doesn't make more power by using more fuel, it uses less, the factory tune for the VE is rich especially in the rpms that vvl is active. There is something physically wrong(mechanical/electrical) that is causing your poor fuel economy.
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