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2JZGE Na-T TT Ecu Mod

Old 10-25-18, 02:48 PM
  #3691  
Ali SC3
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There is a 2 pin connector on the stock coil that is mounted by the cruise control stuff on the passenger side.
You don't need to use that though, so just ignore the stock coil connector/wires and run the new 3 wires from the ignitor to the coils like in the diagram, and also for the b+ splice at the ignitor.
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Old 11-01-18, 10:43 PM
  #3692  
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Thanks to you sir itís all done on that part!!
I have another question I do t know if you can answer this.
my 97 block and the tb has a 2 tpss one for throttle the other for trac I guess.
Instead of taping into tps wires can I use the second tps wiring for map for positive and ground?( Or will that activate the trac in the jdm tt ecu?
here is a pic of it for reference.
my car is a 97 so is all the ecu to engine wiring, but my head and block are obd1 Iím just going to throw this out there so we know whatís Iím doing
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Old 11-02-18, 09:44 AM
  #3693  
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for tapping into the 5v and ground for the map sensor you can use either tps.
it wont activate trac its just getting the 5v and ground.
the JDM ecu can control trac, if you SC originally had it but I am not sure if it works plug and play or some wiring changes need to be done.
my guess is that its plug and play if you wiring harness (2nd tps plugs etc..) and chassis (that metal canister looking thing by the brake booster) and engine (2nd tps and throttle plate) have the trac stuff on it.
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Old 11-15-18, 07:19 PM
  #3694  
joe diego
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Originally Posted by Ali SC3 View Post
what fuel pump are you using? If you want to put a denso or anything more than a walboro, then run regular automotive 12v relay that is triggered by the stock fuel ecu (drivers side B pillar thing behind seat).
if you are running a walboro you can probably just use the stock wiring and just change the pump.



anything in the 58mm to 64mm range would be a good match for the tt ecu mod, but it depends on how fast you want it to spool and how much power you want to make, along with quality 440cc injectors.
im about to install an oem turbo mkiv fuel pump.

Thanks for the response btw. Youíve really helped me out the past couple years. 👏
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Old 11-16-18, 10:02 AM
  #3695  
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No worries, good luck with the mods and I would use the stock fuel ecu to trigger the mk4 pump.
no sense in frying the stock fuel ecu if your is still working, the relay will make sure it keeps working for a long time.
They aren't getting any easier to find.
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Old 11-16-18, 11:30 AM
  #3696  
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One more mod done for GS300. Still using stock distributor to make sure that new ecu, igniter and my wiring was ok. Car was like stock on first start after the mod. Now just have to install coilpacks, spark plugs and bigger injectors and turbo and hide all those wiring from engine bay of course. Thank you so much Ali SC3 for this thread. It was easy to make this mod with this guide.

i have extra Denso IK20 laying around. Do you think those are good enough with this mod? Injectors will be 470cc with this setup.

small video from the first start after this mod:

Last edited by Arppe; 11-16-18 at 09:58 PM.
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Old Yesterday, 04:27 AM
  #3697  
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Hi Guys!

Has anyone used Impreza WRX injectors blue Denso ones, from research they come as 440cc, high impedance, top feed, 11mm and are apparently direct drop in and plug and play on the connectors to. Ive ordered a set was just wondering if anyone else has had any success with these?
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Old Yesterday, 09:51 AM
  #3698  
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Originally Posted by TRD1 View Post
Hi Guys!

Has anyone used Impreza WRX injectors blue Denso ones, from research they come as 440cc, high impedance, top feed, 11mm and are apparently direct drop in and plug and play on the connectors to. Ive ordered a set was just wondering if anyone else has had any success with these?
I tried them, but was not able to get them to work correctly. I am not sure that the issue was the injectors, though.
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Old Yesterday, 02:27 PM
  #3699  
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Originally Posted by Arppe View Post
One more mod done for GS300. Still using stock distributor to make sure that new ecu, igniter and my wiring was ok. Car was like stock on first start after the mod. Now just have to install coilpacks, spark plugs and bigger injectors and turbo and hide all those wiring from engine bay of course. Thank you so much Ali SC3 for this thread. It was easy to make this mod with this guide.

i have extra Denso IK20 laying around. Do you think those are good enough with this mod? Injectors will be 470cc with this setup.

small video from the first start after this mod:
https://youtu.be/mfSat5nU50o
Sounds good, glad its working out. I haven't used the IK20 but look around online if it works with the 2jz
I normally use the bkr7eix or bkr6eix but everyone likes different plugs

Originally Posted by TRD1 View Post
Hi Guys!

Has anyone used Impreza WRX injectors blue Denso ones, from research they come as 440cc, high impedance, top feed, 11mm and are apparently direct drop in and plug and play on the connectors to. Ive ordered a set was just wondering if anyone else has had any success with these?
Originally Posted by mrmj2u View Post
I tried them, but was not able to get them to work correctly. I am not sure that the issue was the injectors, though.
Not familiar enough with them to know but let us know how it works out. sounds close but check height and spray pattern also.
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Old Yesterday, 04:17 PM
  #3700  
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Originally Posted by Ali SC3 View Post

Not familiar enough with them to know but let us know how it works out. sounds close but check height and spray pattern also.
Good point. The WRX Light blues require that the spacer be removed from the fuel rail to fit. The spray pattern may have been the issue.
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Old Yesterday, 10:40 PM
  #3701  
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Once Ive got the ECU installed I will report back.

What issue would the spray pattern cause, and would it be a problem for our engines?
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Old Today, 10:53 AM
  #3702  
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Originally Posted by TRD1 View Post
Once Ive got the ECU installed I will report back.

What issue would the spray pattern cause, and would it be a problem for our engines?
Here is what I wrote on the WRX injectors back in March in this same thread: https://www.clublexus.com/forums/sc-...l#post10146587
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Old Today, 11:47 AM
  #3703  
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spray patterns are usually close enough but some like the rx7 are more of a stream than a spray since the rotor sits further away.
I am not sure about the boxer engines and what kind of injectors they have.

also they have to be the right impedance, not all high impedance injectors are equal.
those blue injectors look like they are a generation newer and should work but the dead times or lag times might be off and need adjustment, and thats only something you can do with the standalone. with the factory ecu you have to try and match as much as possible.
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