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PostPosted: Tue 07 May 2013, 8:59 pm 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
Hi All,
Always wondered why mitsi "de-tuned" the AC Cordia for unleaded 91 RON fuel?

Mainly to keep the engine alive due to poor fuel, with "better" fuel available today here is a way to return the AC to AB power output, I have done this on my AC and it goes like hell!

PLEASE BE WARNED THAT THIS MOD WILL REQUIRE THE USE OF 98+RON FUEL.

Firstly:
Piss off the AC distributor (3108).......total advance is only 40 degrees where the AB (3172) has a total of 44 degrees.

The reports of smaller heads and manifolds is bullshit.........they are the same as AB.

Camshaft timing changed between the models.

Run the AC E101, this has a basic timing retard of 12 degrees where the AB is 8 degrees, the more knock that is heard the more the timing will retard.

Image

AB on left, AC on right, you can tell the difference by the sealing beading.

Run an AB boost/map sensor.........the AB tops out at 14 psi where the AC runs out at 12 psi........or you can run a fuel cut defender (the Jaycar one is great as it "clips" the max voltage to 3.8 volt)

Run a TC06 wastegate on the TC05 turbo.........the spring tension is different........TCO5 is set at 74.1 kpa (10.7 psi) and the AB is set at 83.7 kpa (12.1 psi) this is the main operating pressure.

Image

TC05 wastegate.

Image

TC06 wastegate.

The JA Starion ran 92 kpa (13.3 psi) on the TCO6........same as cordia but had a fuel cut of 15 psi.

Hope this helps others return the AC back to the future fuel levels.

Feedback welcome.

Cheers,
Andrew.


Last edited by Bitza on Sun 08 May 2016, 2:34 pm, edited 2 times in total.

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PostPosted: Tue 07 May 2013, 9:33 pm 
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1800 CORDIA
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Location: Karingal , Frankston Vic
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Great Post, always wanted to try the TC06 actuator on the TC05 also

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last cordia:
Blue 88 GSR turbo AC with 62t, TD05 14B and FMIC, 104wkw on 14psi
( I WOULD LIKE IT BACK IF POSSIBLE, OLD REG SYH354 )


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PostPosted: Tue 07 May 2013, 9:36 pm 
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Joined: Fri 09 Jun 2006, 11:35 pm
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
Thanks Travis, will edit with pics soon.


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PostPosted: Wed 08 May 2013, 6:07 pm 
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Joined: Sat 25 Jun 2011, 1:49 am
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Your car: 1984 gsr cordia turbo nick named serenity
thats wicked do you know any nice mods for the ab andrew?

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PostPosted: Wed 08 May 2013, 6:27 pm 
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Joined: Fri 09 Jun 2006, 11:35 pm
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Location: Adelaide South Australia
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
For the AB.........best thing I ever did (when leaded fuel was still around) was the fuel cut defender and three inch exhaust.........then came the T3/5 turbo, multi point injection with a wolf ECU was next..........still not enough........went 2.0 VR4 with Wolf 3d, still not enough.......2.3 VR4!


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PostPosted: Fri 10 May 2013, 1:35 pm 
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Your car: 1984 gsr cordia turbo nick named serenity
cheers dude that sounds wicked think ill stick with dash 2.0 XD

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PostPosted: Mon 20 May 2013, 12:47 am 
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Tops :)

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PostPosted: Fri 02 Aug 2013, 3:34 pm 
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Did not edit with pics, not happy!

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PostPosted: Sun 08 May 2016, 2:35 pm 
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TRQ-STR wrote:
Did not edit with pics, not happy!


Done for you Koray........forgot about this post.


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PostPosted: Sun 08 May 2016, 9:45 pm 
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Lol Andrew, great post mate!

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PostPosted: Mon 09 May 2016, 3:13 am 
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Your car: 1984 AB cordia turbo
thanks Andrew :D
waste gate look same never thought spring was different.
wow never thought e101 was different either.
AC distributor 3108 how can i tell what i have is the 3108 stamped
on it?
cams are both the same?
i have 3 cams and they have numbers stamped
on them all different numbers .
about the fuel are these guys right in this show
can i use the fuel they recommending?
https://www.youtube.com/watch?v=ltWcgiCm4NY

thanks great post :D

about fuel cutout from jaycar i rang them
they said to ring Monday as there warehouse not open weekends.
if they have one i will definitely get one.


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PostPosted: Mon 09 May 2016, 3:33 pm 
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College of Knowledge.


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PostPosted: Mon 09 May 2016, 4:14 pm 
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Joined: Fri 09 Jun 2006, 11:35 pm
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Location: Adelaide South Australia
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
If you look closely the TC05 wastegate has a "bump" on the end.........3108 is stamped on the dizzy, its the last 4 digits as the others are the same, cams have different duration.........thanks Goran.


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