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 Post subject: Re: Stuff
PostPosted: 02 Jun 2016, 15:20 
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1800 CORDIA
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they did have the 4g63 in the same style SOHC , I think the Japan cordia's had them from memory I could be wrong though

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AA Silver saved,4g62t SOHC,Td05,FMIC
AB Silver bullet in the build, 4G62T DOHC
AB Silver original unrestored 1 owner car
AC Wanted $$$(must have 4g62t, or I can swap it back)

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


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 Post subject: Re: Stuff
PostPosted: 02 Jun 2016, 15:43 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
That's Grant's old car, Matthew owns it now, that engine is a 63 as stated as part of the engine number and has full roller cam and hydraulic lash adjusters.

You could tell the difference between the 63 and 62 as the rocker cover was a little different, the crossover pipe is completely different shape (longer) and painted metallic silver with red ECI TURBO lettering.


Last edited by Bitza on 02 Jun 2016, 17:57, edited 1 time in total.

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 Post subject: Re: Stuff
PostPosted: 02 Jun 2016, 17:55 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
Here is what they look like:

Image

Grant's old car with import 63:

viewtopic.php?f=12&t=16661&start=60


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 Post subject: Re: Stuff
PostPosted: 02 Jun 2016, 18:26 
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Super Cordia Guru
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whats the difference between 62,63 looks same performance wise


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 Post subject: Re: Stuff
PostPosted: 02 Jun 2016, 19:11 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
62 is 82mm piston diameter, 63 is 85mm.

Big difference.


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 Post subject: Re: Stuff
PostPosted: 02 Jun 2016, 19:34 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
Mocked up the Galant rocker system on my bare AC head........all fits.........checked the cordia tunnel retainers, they are the same, the rocker rods are not, the Galant has an oil hole in the back to pressurize the lash adjuster where the cordia's in omitted.

Just need to check rocker cover clearance, doesn't look too good at the moment.

Image


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 Post subject: Re: Stuff
PostPosted: 03 Jun 2016, 11:52 
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1800 CORDIA
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very close so far though

_________________
AA Silver saved,4g62t SOHC,Td05,FMIC
AB Silver bullet in the build, 4G62T DOHC
AB Silver original unrestored 1 owner car
AC Wanted $$$(must have 4g62t, or I can swap it back)

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


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 Post subject: Re: Stuff
PostPosted: 04 Jun 2016, 19:04 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
Ended up getting 24 lash adjusters from a TL magna........all of the 96 - 98 Veradas adjusters where stuffed...these are in great condition with minimal wear and are "solid" to push in and out.

Image

All cleaned and checked in accordance with the Mitsubishi service manual.

Yes, the other eight are in the rocker gear.

I had to make some "retainers" so the lash adjusters don't fall out during installation........simple use of tin plate has achieved this:

Image

Nearly ready for installation................no more noisy tappets...........yes!!!!

The rocker cover clears from what I can see.


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 Post subject: Re: Stuff
PostPosted: 05 Jun 2016, 23:23 
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Your car: 1984 AB cordia turbo
makes me wonder
the 4g63 vr4 head twin cam.
would it fit 4g62 block? :roll:


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 Post subject: Re: Stuff
PostPosted: 11 Jun 2016, 18:25 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
Big disappointment..........fitted the rocker set only to find the rocker ratio is WAY off with the cordia camshaft, there is a good 4mm gap.

Here is a pic of the difference:

Image

The engine was "rattling" like a bitch!

OK, take two........go to the wreckers and find a TP magna.........take its rocker set........rocker angle is perfect when layed on the original adjustable one:

Image

Image

Only problem is they are all 1 in 3...........I now need 4 2 in 4's to complete (Rockers are around the other way), so my question is.........which other model mitsi runs the lash adjusters to suit?


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 Post subject: Re: Stuff
PostPosted: 11 Jun 2016, 19:24 
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1800 CORDIA
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I put a Galant/Sonata roller rocker/hydraulics lifters assembly in my Starion with no problems. I believe that I used the Galant camshaft though.


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 Post subject: Re: Stuff
PostPosted: 11 Jun 2016, 19:50 
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Joined: 10 Jun 2006, 00:35
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
Why would you use the Galant camshaft.........it's 252 degree in duration where the JA is 264?


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 Post subject: Re: Stuff
PostPosted: 12 Jun 2016, 00:02 
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1800 CORDIA
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Because using a roller rocker on a slipper rocker type camshaft will change the valve timing.


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 Post subject: Re: Stuff
PostPosted: 12 Jun 2016, 00:12 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
Can't see how this changes the advertised cam duration?


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 Post subject: Re: Stuff
PostPosted: 12 Jun 2016, 11:26 
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1800 CORDIA
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Image

Apologies to the guys from starquestclub forum who i stole the piucture from.

See how the diameter of the roller is smaller than the diameter of the slipper. This will affect ramp rates and acceleration of valve opening. Using a roller rocker on a slipper cam will effectively make the cam smaller.


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 Post subject: Re: Stuff
PostPosted: 12 Jun 2016, 20:56 
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very interesting coop1er thanks for that.
its giving me crazy ideas on my next engine built.


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 Post subject: Re: Stuff
PostPosted: 26 Jun 2016, 16:36 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
OK, have installed the hydraulic system into my AC, the engine is not "silent" you can still hear some "ticking" but I have a reflective structure (my shed), I believe most of the "noise" is coming from the rockers just touching the ribbing of the rocker cover..........will check later, the engine idles very smoothly and responds nicely to a quick open throttle.

Pretty happy so far.............here are some pics:

Image

Image

Research and development continues, ended up getting a full rocker set off of a 2 litre Express van.


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 Post subject: Re: Stuff
PostPosted: 28 Jun 2016, 20:17 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
Ok, have removed the rocker cover, turned upside down only to find no trace of the rockers "touching" the internal ribbing.

As seen here:

Image

Will replace with a proper AC cam cover, the one above is AB........but just to be sure will "flatten" the ribbing slightly.

Image

The hydraulic tappets maybe just need to settle in.


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 Post subject: Re: Stuff
PostPosted: 28 Jun 2016, 20:36 
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I'm very interested to hear the turn out for this


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 Post subject: Re: Stuff
PostPosted: 29 Jun 2016, 09:18 
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i think you right just needs settle in.
i would take it for nice drive them see if noise still there.
ab and ac cover looks identical only one looks cleaner


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