If i wanted to convert a 6G72 Magna to a 6G74, can i run the 6G72 ECU or will i need one from a 6G74?

Also I believe the 4-spd auto will bolt up fine to either motor.

What about the driveshafts are they the same?

And will i need to mod the exhaust under engine pipe in any way?

Have a read of this Mohit. Good info to be had.

http://www.aussiemagna.com/forums/showthread.php?t=19110&highlight=6G72+6G74+conversion

Have a read of this Mohit. Good info to be had.

http://www.aussiemagna.com/forums/showthread.php?t=19110&highlight=6G72+6G74+conversion
Thanks for that. Was looking for it but couldn't bring it up in the search results.

Ok so after reading that thread it looks like you can run a 6G74 motor with a 6G72 ECU but the timing will be out, meaning you will need to run a piggy ECU to fix that up.

Would another option be to get a 6G74 ECU, keys, ignition barrel and door locks and use that with a 6G74 motor?

how concerend are you about the timing being a tad differnt?

a member of these forums put a ralliart motor in a TE and left it running a stock TE ecu for ages.. had heaps of power, drove well..

dunno if it good for the motor or not though (ie not sure how much difference there is in timing between the two)?

i'm about to buy a TJ ecu off a forum member.. i will be putting this into my TH.. i will need to remove the immob. check from the ecu to do this.

once i do this i could then do the same for you.. you would need to send me a TJ ecu.i could remove the immob. from the ecu and then you could fit this TJ ecu into the car that your installing the 6G74.. would save a lot of hassle.. 2nd ecu wouldnt cost much either..

when you doing this job?

how concerend are you about the timing being a tad differnt?

a member of these forums put a ralliart motor in a TE and left it running a stock TE ecu for ages.. had heaps of power, drove well..

dunno if it good for the motor or not though (ie not sure how much difference there is in timing between the two)?

i'm about to buy a TJ ecu off a forum member.. i will be putting this into my TH.. i will need to remove the immob. check from the ecu to do this. The auto seems to be fine but will do a fluid change anyway just to be on the safe side.

once i do this i could then do the same for you.. you would need to send me a TJ ecu.i could remove the immob. from the ecu and then you could fit this TJ ecu into the car that your installing the 6G74.. would save a lot of hassle.. 2nd ecu wouldnt cost much either..

when you doing this job?
Here's the story:

My friend's been given a 6G72 TE Magna for free. The motor's almost gone so we thinking of upgrading to a 6G74 if we've got the chance.

So if we got an ECU to match the 6G74 motor, we can still use the original keys in the original ignition to start the car so as long as the immobilizer funtion is removed from the ECU yes? How much do you charge for this? You can PM me if you don't wanna post here.

done this last weekend 72 to 74 using the 3.0 ecu and manual box, reused upper intake and throttle body as i didnt want tcl, had to use the sandwedge plate off the 3.0 modify it a bit, aircon bracket was different also. wait for mal he can give all the details

ecu runs it fine drives rather hard

Mohit, Surprised you did not come directly to me in the first place and I could have cleared this all up lol

You will be best off to run the 72 ECU as the 74 ECU will then need BEM, locks etc unless you fit it all and then take to mits to reprogramme

Only reason we used the 72 top was to remove the EGR stuff not supported by the 72 ECU

Sandwich plate was used from the 72 as it is a manual, this was a brain fade of mine on the weekend not thinking about this, when I first bolted up the box I assumed they were the same, with the one you are looking at, both are auto so may as well leave it as I am 99% sure will be the same

In short, I can do this for you no dramas. is a good days work but you could in theory drive in the morning and drive out in the late arvo.

You will need the 3.5 engine pipe but the rest of the exhaust will be just fine

Timing is not an issue at all, the 74 does have a different timing curve but for us was even less worry given that we were doing a Manual, there are many however getting around with the 74 installed on the 72 ecu, Magnaussie is one example (is how he brought the car in the first place)

mohit, i wont charge you anything mate ..just gota do mine first to be sure its all ok..

i wont be attempting to charge anyone for anything on amc...yet... gotta do the right thing and get sponership from amc before i charge anyone for anything.... (not ready yet though)

done this last weekend 72 to 74 using the 3.0 ecu and manual box, reused upper intake and throttle body as i didnt want tcl, had to use the sandwedge plate off the 3.0 modify it a bit, aircon bracket was different also. wait for mal he can give all the details

ecu runs it fine drives rather hard



Mohit, Surprised you did not come directly to me in the first place and I could have cleared this all up lol

You will be best off to run the 72 ECU as the 74 ECU will then need BEM, locks etc unless you fit it all and then take to mits to reprogramme

Only reason we used the 72 top was to remove the EGR stuff not supported by the 72 ECU

Sandwich plate was used from the 72 as it is a manual, this was a brain fade of mine on the weekend not thinking about this, when I first bolted up the box I assumed they were the same, with the one you are looking at, both are auto so may as well leave it as I am 99% sure will be the same

In short, I can do this for you no dramas. is a good days work but you could in theory drive in the morning and drive out in the late arvo.

You will need the 3.5 engine pipe but the rest of the exhaust will be just fine

Timing is not an issue at all, the 74 does have a different timing curve but for us was even less worry given that we were doing a Manual, there are many however getting around with the 74 installed on the 72 ecu, Magnaussie is one example (is how he brought the car in the first place)
Thanks for the info guys. Looks like we'll keep the 72 ECU when the 74 donk goes in.
Regarding the sandwich plate i think i still have the one from my auto when the manual conversion took place.
Is the engine pipe the one that connects the front header to the rear header?
And the CV drive shafts remain the same i'm guessing?

Thanks for the offer Mal but we will be giving this conversion a shot ourselves (3 mates). Great opportunity to learn about the mechanical side of cars even more.

BTW, any good 74 donks out there for sale in Melb? lol




mohit, i wont charge you anything mate ..just gota do mine first to be sure its all ok..

i wont be attempting to charge anyone for anything on amc...yet... gotta do the right thing and get sponership from amc before i charge anyone for anything.... (not ready yet though)
Good to see this kinda support within the community :)

Hi All,
If you are concerned about the ecu, can't you use a 6G74 ecu from a KE/HF Verada?
Presumably they are also pre BEM?
I am pretty sure that my Father in Law's KF is.
Might be worth checking out.

Hi All,
If you are concerned about the ecu, can't you use a 6G74 ecu from a KE/HF Verada?
Presumably they are also pre BEM?
I am pretty sure that my Father in Law's KF is.
Might be worth checking out.

i dont beleive so? i thought they all had the immob??

You may well be right there, I will have look next time he is up at my place.

EI may be a possability bit XI no go as they have a diff immob

Other thing to think of is that although the immob in the E's and F's do not match the ECU, it is really hit and miss as to what will work with each other

Mohit, Jolly's have the engines for about $700 with warranty, may be your best bet. You should have brought the 3.5 I had for sale a few weeks ago lol

ebay always have 3.5L for $500

Is the engine pipe the one that connects the front header to the rear header?
And the CV drive shafts remain the same i'm guessing?
Anyone?

Anyone?

Yep, that's the engine pipe, or called the "secondary's"
The driveshafts, mmm....Not sure ALTHOUGH give bursons a call (like now:P) and they should be able to tell you

Ok, let me just clear this up... To do this conversion on a 3.0 TH I will need nothing more then the engine pipe, which is the pipe between the headers and cat, or do I need the headers too?

Being a TH, the ECU supports the EGR, manifold has provisions for it, only real differences are timing and capacity. Also if I get an unlocked ECU, I should be able to plug that straight in (ie. 3.5 TJ ECU).