4age Ecu, Adm Vs Jdm

[Trev]

I've seen 300 duration cams run fairly well on a stock big port ecu. The drama is the mix is too rich at low revs and the spark blows out, with a narrower spark plug gap you can actually make the motor idle :)

 

Fuel pump doesn't mean much, it's the regulator on the end of the fuel rail that should dictate the pressure, you may get a tiny bit of extra fuel pressure with a bigger pump, but it's fairly negligible.

 

Remember you have to trick the speed sensor with the JDM ecu to open up its timing advance and the 8200rpm rev cut. You can use a 555 timer circuit or a dodgy relay wired to a flasher can for indicators, hmm does the factory speedo in an AE82 have a pulse output?

 

Have a look at your injectors too, a simple mod you may not have considered to open up some more top end is some pink 200cc injectors to replace the 180cc greys that most bigports run. If the install is an engine swap, make sure the memory power is wired up, or the ecu with loose all the fuel trim data it learns from the oxygen sensor ( assuming it works) at low rpm and highway cruise. You could use any injector, just has to be low impedence or you need to remove and solder a link across the internal drop down resistor in the ECU to give them enough current to open.

 

272's in a bigport will spank any stock 20V. If you've got a nice set of cams and a ported head I'd say get an aftermarket ecu and get it tuned by someone who knows what they're doing. When you want some more power get a GZE or 100kw bottom end end give it some love and get a turbo of your choice and boost the thing. I've seen 300hp atw on stock cams, so you can get more with your head for sure.

 

Modded cars cost money, think of an ECU as an investment, you can always shelve it and use it in a new project if need be.

 

300's on a standard ecu, So to go through the hassle of changing the shim over bucket setup and chuck on a stock ecu that limits the engine seems like a waste to me.

 

 

Bigports have black injectors, Pink were the later bigports.

 

AE82 are a speedo pulse.

 

Edited April 29, 2010 by Trev

[Johno]

I've seen 300 duration cams run fairly well on a stock big port ecu. The drama is the mix is too rich at low revs and the spark blows out, with a narrower spark plug gap you can actually make the motor idle :lol:

 

Fuel pump doesn't mean much, it's the regulator on the end of the fuel rail that should dictate the pressure, you may get a tiny bit of extra fuel pressure with a bigger pump, but it's fairly negligible.

 

Remember you have to trick the speed sensor with the JDM ecu to open up its timing advance and the 8200rpm rev cut. You can use a 555 timer circuit or a dodgy relay wired to a flasher can for indicators, hmm does the factory speedo in an AE82 have a pulse output?

 

Have a look at your injectors too, a simple mod you may not have considered to open up some more top end is some pink 200cc injectors to replace the 180cc greys that most bigports run. If the install is an engine swap, make sure the memory power is wired up, or the ecu with loose all the fuel trim data it learns from the oxygen sensor ( assuming it works) at low rpm and highway cruise. You could use any injector, just has to be low impedence or you need to remove and solder a link across the internal drop down resistor in the ECU to give them enough current to open.

 

272's in a bigport will spank any stock 20V. If you've got a nice set of cams and a ported head I'd say get an aftermarket ecu and get it tuned by someone who knows what they're doing. When you want some more power get a GZE or 100kw bottom end end give it some love and get a turbo of your choice and boost the thing. I've seen 300hp atw on stock cams, so you can get more with your head for sure.

 

Modded cars cost money, think of an ECU as an investment, you can always shelve it and use it in a new project if need be.

:) ... Thanks mate :lol:

[Johno]

I'm very simple, as you both might know.. Unbolt this, bolt this up. 4ac out, 4age in Thats about as far as my mechanics go. To change cams over id just pay my mechanic to do it for me.

 

btw, i got know idea what a pulse speedo is.. :)

[Johno]

Just looking at this page for injectors

What do i have and what do i need? I'm confused, its both grey and black.. :)

http://www.lextreme.com/Injector%20data.htm

Edited April 29, 2010 by Johno

[beerhead]

They were special Tighe grinds with standard lift and big duration, no need for shim under bucket if you don't wanna rev it to hell and back. I had a good conversation with one of the Tighe brothers about buckets and shims one day. Apparently with a low lift long duration cam the ramp rate isn't fast enough to put the point of load far enough on the outer edge of the shim to pop them off. He said all their work is checked on a simulator. Only problem is lift makes power, duration makes powerband, so I doubt that the motor was seeing its full potential, esp with the factory ecu. He just scored the head with the cams for cheap and went with it.

[beerhead]

They're definitely grey injectors, just go off the top part. The pink ones have a round type denso plug not a bosch one like those.

[Johno]

Ok, just done a little more research on injectors. If the pink ones are a different plug, what about the blue ones? They are only slightly higer impeadence, 2.4 ohm and 210 cc. and they have the same plug that i already have. I guess it would only be as good as what the ECU is sending out though

I think i have wiring C, thats what the chart is showing.. :)

Edited April 29, 2010 by Johno

[Trev]

They were special Tighe grinds with standard lift and big duration, no need for shim under bucket if you don't wanna rev it to hell and back. I had a good conversation with one of the Tighe brothers about buckets and shims one day. Apparently with a low lift long duration cam the ramp rate isn't fast enough to put the point of load far enough on the outer edge of the shim to pop them off. He said all their work is checked on a simulator. Only problem is lift makes power, duration makes powerband, so I doubt that the motor was seeing its full potential, esp with the factory ecu. He just scored the head with the cams for cheap and went with it.

 

That's different tho, They are basically custom cams to suit the application, When you generally say 272's you expect 8.1mm lift.

 

They're definitely grey injectors, just go off the top part. The pink ones have a round type denso plug not a bosch one like those.

 

I keep forgetting they are grey on top, Might start calling the pink tops in the mrs car chrome injectors.

[beerhead]

See how you go finding those injectors. I wonder if the 3SFE camry ones might be worth a look. It isn't much of a drama swapping plugs either. You can also get short plugs that adapt the connector too.

[Johno]

Ok cool, thanks Brad :) I'll look into it soon

 

Well, look what i bought today :)

 

 

Bought it from a toyota wrecker that deals with a fair few JDM cars

He didn't have a ae82 one but one from a ae92, He said its was still a 4age 16v Bigport with TVIS so hopefully all good :)

He said it shouldn't be a prob but just incase, open the top of both ecu's and check the pin out connectors :P

[Johno]

Ok, Here they are, the side by side, ADM vs JDM ecu pics

 

ADM is Left - JDM is right

 

 

Here's a close up of the 10p pins that don't match up, only 2 out of all

This is the ADM one

 

this is the JDM one

 

So heres the problem,

The adm ecu has nothing writen on there while the jdm ecu has "ACT" and also where adm says "BF" the jdm says "FPU" Does anyone think this would be a problem? I wouldn't mind just plugging it in and go for a spin but you you recon i would do any damage? Sorry, I'm a noob when it comes to this kinda thing :)

Edited May 4, 2010 by Johno

[Trev]

BF is Injector +B

 

FPU is fuel pressure reg control.

 

You really needed to get an 86 ecu.

[Johno]

:)

 

 

 

 

 

Edit

How about this then,

 

Here is "+B", it the same on both ecu's

Edited May 4, 2010 by Johno

[Johno]

sorry, just found out +B & +B1 are some ECU relay feed, nevernimd :( I thought i got my hopes up for a sec

f@$ks sake, they guy said no refunds if its different ECU pins.. :bash: :bash: :bash:

Anyone want a JDM Ecu for a 92?

[beerhead]

You need an AE86 JDM sprinter ECU for the uprated KW and rev cut, I'm honestly not sure if the AE92 one you have there is the same deal. Plug it in and see how it goes.

 

BTW I think the pins will match up, they're just printed underneath on one and on top on the other

Edited May 4, 2010 by beerhead