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Old 05-06-2011, 09:28 AM   #51
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well is the Ver 9 plug and play with the 02-05? that's the real goal here. Getting and easy way to put AVCS on 02-05 cars without full standalone.

The thing is that's easy to do with ver 7/8 but people want a silly amount of money for the heads because they have that mythical JDM dust on them that makes them super duper awesome

Keep me posted on the part numbers. Also can you varify that the Ver 9 did go to hall effect? You have that engine right? can't you just pull the cam sensor and look at the end of the camshaft?

How exstenisve was your swap in your car? Are the Ver 9 pretty much plug and play as well, short of added AVCS wires, etc?
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Old 05-06-2011, 09:36 AM   #52
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And just as a small hijack, the best combo, under my opinion, is the V7-9 EJ207 heads with the extra-beefy V10+ EJ207 Shortblock, runing a 16bit ECU with throttle by cable and a V9 ECU.
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Old 05-06-2011, 09:38 AM   #53
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Nono, the V9 is not Dual AVCS yet. V10 would be that.
V9 is 2005-2007.
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Old 05-06-2011, 09:39 AM   #54
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Quote:
Originally Posted by Vlad
This is another speculation:

The 32 bit ECu coincided with USDM introduction

It may be a pre-requisite to run throttle by wire.

So my guess is that the Dual AVCS EJ207 Sti Spec C is 32bit.
That's what I though but doesn't mean its true, I would like to find out, so hard to find out about the jdm engines
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Old 05-06-2011, 09:41 AM   #55
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Here's how I perceived the problem being discussed:

let's say you want to build an EJ257, but want better cams, staying OEM.
You are already equipped with a 32bit ECU that can detect hall effect cams.

So then V10 is plug and play.

As far as if you are building something based on a EJ205, then yes, you would need to stay upto a V9 and yes, I have info about how the full V9 went into my 2002 chassis.
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Old 05-06-2011, 09:43 AM   #56
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Right ver 9 is pretty much identical, as 8, same heads pistons everything, except I think It may have different cams, honestly I don't know why they want So much for the heads lol,

So homemade what is your thoughts ln the jdm cams in the usdm heads????
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Old 05-06-2011, 09:45 AM   #57
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Quote:
Originally Posted by Vlad
Here's how I perceived the problem being discussed:

let's say you want to build an EJ257, but want better cams, staying OEM.
You are already equipped with a 32bit ECU that can detect hall effect cams.

So then V10 is plug and play.

As far as if you are building something based on a EJ205, then yes, you would need to stay upto a V9 and yes, I have info about how the full V9 went into my 2002 chassis.
Right, but we are trying to see how well the jdm cams fit in the usdm 2.5 heads, the use jdm Cam sensors and jdm ecu and bam you could do a complete 2.5 swap with working avcs in any wrx
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Old 05-06-2011, 09:45 AM   #58
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ok, for discussion sake, can we please leave shortblocks out of this? This is a discussion primarily of heads and ecu.

First look at the pics you had sent, I have concerns of the sensor not picking up the trigger because of misalignment. Trying to pick up a set of scrap castings from a local. Still need to track down cams...so I can put data rather than speculations. I don't like to speculate because of the confusion is can present or so I've learned over the years.
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Old 05-06-2011, 10:01 AM   #59
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Sorry about the shortblock.

Ok, I did not read close enough.
I understand now, you want to avoid the whole business of 32bit and un-ending additional expenses with throttle by cable.

Then you would have to use the sensors that came with the V7-9 cams and make sure they can be bolted into the 257 heads. Since you would swap both cams and sensors, I would think that's a match then.

And then you would use a JDM ECU that plugs directly into the 16bit harness and the IAP AVCS harness. The determine the polarity of the neutral switch to go with it.
If you have an old transmission, older than 05 and have a V9 ECU, get a 32008AA150 neutral switch for USDM 05+ 5 speed.
If you have any other ECU 7 or 8 get the older 02 Switch.
Or patch the polarity of the switch in the ECU via reflash.
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Old 05-06-2011, 10:06 AM   #60
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^^^yup. I'm a fan of the patch as it's free.

However now that we are all caught up, I guess is just comes down to getting a set of heads to measure the cam sensor angle/placement relative to the cam and then see the cam trigger angle (on the cam) relative to the crank angle (can be done on either head).

Someone find me some cheap JDM AVCS cams
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Old 05-06-2011, 10:20 AM   #61
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define cheap
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Old 05-06-2011, 10:21 AM   #62
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like i said, (not sure if it got deleted, i could send you my two ver8 cams, but i would need them back in about two weeks so they can go back to the shop for final assemby.....
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Old 05-06-2011, 10:35 AM   #63
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Sean, I might take you up on that. I can at least slap a spare motor and heads together with timing gear and get measurements on the USDM parts with the JDM cams!! Would you be able to send them this weekend? If so, let's do it up. I'll get measurements next week and send them back.
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Old 05-06-2011, 10:47 AM   #64
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yes, text me your adress, i will send them tomorrow in an extremly well packed package lol, do you need all 4, or or just the two intakes???? can you get acurate measurements on them???

split shipping???? also do you need the position sensors as well???
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Old 05-06-2011, 01:12 PM   #65
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did you save my number? my phones been acting dumb and won't let me save numbers

shoot me a text and I'll get back to you.
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Old 05-26-2011, 11:17 AM   #66
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any updates?
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Old 05-26-2011, 11:47 AM   #67
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working on it. It's been an insane race weekend and two weeks at work, so hopefully tonight I can get some work time with an engine and some cams in my garage. Put basically, I don't think it'll be a simple fix. The sensor hole doesn't line up with the trigger as the trigger on the magnetic avcs are further towards the back of the motor than the hall effect trigger.
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Old 05-26-2011, 12:03 PM   #68
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I figured you were busy with lemons.

that sux. machining required.

I know the triggers are a different plolarity, but is the trigger timing the same? and are the soleniod the same between JDM and USDM?

wondering if the USDM pickup be converted to talk to the JDM ECU? it shouldn't be overly difficult to convert the pulse polarity.

Last edited by biodude; 05-26-2011 at 12:08 PM.
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Old 05-26-2011, 12:31 PM   #69
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I know a magnetic crank trigger almost fits on the money but the hole needs to be opened just a little (easily DIY with a drill bit) however it still doesn't line up correctly and would need to be sealed. I don't have a JDM sensor to check for fitment nor JDM heads for comparison either.

Haven't had time to work on all the cam timing stuff, so it's still on the way.

besides, you sniped though 207 heads out from under me so why are you so curious?
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Old 05-26-2011, 01:04 PM   #70
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im a curious person.

and the heads..well... I tried to lend them to you.

there is a fairly cheap broken set on the f/s board somewhere. less than what B7G's cost me.
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Old 05-26-2011, 03:25 PM   #71
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Double post
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Old 05-26-2011, 03:26 PM   #72
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check out the thread in proven power they said they had a jdm 2.0 and put usdn sti cams and sensors in and it worked just fine, so I figure it will work the other way, I think there is enough there for the sensor to read

I have jdm heads so I'm just worried what the lift and durations end up being on those beasts lol
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Old 05-26-2011, 05:50 PM   #73
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Quote:
Originally Posted by biodude View Post
im a curious person.

and the heads..well... I tried to lend them to you.

there is a fairly cheap broken set on the f/s board somewhere. less than what B7G's cost me.
yeah, a buddy already forwarded them to me.
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Old 01-10-2012, 02:52 AM   #74
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Hey this thread hasn't been touched in a while. So I'm a special case where I had an 04 wrx running a V8 with AVCS functioning. I had some damage to my chassis so I found my way to an 07 STi chassis.

I'm trying to transfer everything over but I'm dealing with the drive by cable and the 32 bit ecu.

As far as the avcs and ecu goes, am I correct in swapping the JDM V8 cams with USDM 07 STi hallowed cams, the JDM AVCS sensors with the USDM AVCS sensors, and the JDM V8 16 bit ECU for the USDM 07 STi 32 bit ECU?
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Old 01-10-2012, 10:52 AM   #75
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Quote:
Originally Posted by Homemade WRX View Post
Sean, I might take you up on that. I can at least slap a spare motor and heads together with timing gear and get measurements on the USDM parts with the JDM cams!! Would you be able to send them this weekend? If so, let's do it up. I'll get measurements next week and send them back.
I can probably save you the trouble. Tell me what measurements you are looking for.

I can tell you that the angle is the same on the sensors, the usdm cam sensor is smaller the the jdm in diameter.

We just finished machining a set of JDM Version 8 heads for my engine, they have USDM cam sensors and after market usdm style cams.

Its a service that we will most likely start offering for guys that want to run jdm heads.

Micah Ill PM you the details.
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