NA 3.5L discussion - Page 2 - 3000GT/Stealth International Message Center

iufan4lifeul · 11-30-2007, 09:22 AM

I am also interested in this swap. It is for my friends car we are building. He has a 5 speed SOHC. We are looking at the JDM 6G74 and then getting some custom cams ground as well as running emanage or something. He currently has an intake and a testpipe back 2.5" exhaust. Probably port and polish the head as well. Just wondering what you all thought of this. It would be pretty cheap to do before we put it in the car. It would be a 100% NA motor. No nitrous, turbo etc. Would anything else be worthwhile? High compression pistons (if they are even made) etc.?

3g3000gt · 11-30-2007, 09:34 PM

no the bracket by the alternator or something I got a guy on FL3S willing to make then. I'm serious about this swap. What are you tuning with?

TUFFTR · 11-30-2007, 11:13 PM

Quote:

Originally Posted by WhiskeyIsQuick

wait, im guess im missing a part...but the 6g74 is a straight drop in? no custom mounts needed...?

If its the JDM 74', the no, no modifications at all

3g3000gt · 12-01-2007, 08:20 PM

Anyone know about the ECU options???? It will take me a while to gather everything I need, but Christmas is coming up and I can get a free pass to buy stuff from the wife for myself. Will Emanage be enough? Which ECU should I use? Will my current harness fit the jdm debonaire or pajaro ECU since it works on the GT???

3g3000gt · 12-02-2007, 07:30 AM

Wikipedia under 6g74. That would be the Montero. the Debonair is 260. Same engine different ECU. that's why I have my questions. If it's just a matter of the ECU's timing/fuel/air maps then I can use the 6g72 ECU(incase they don't send me one) for a more aggressive base map and use my Emanage to bump up timing and control the injectors and so on and so on.

1Forest1 · 12-02-2007, 09:11 AM

I would not assume that it is simply the ECU making an additional 55HP.
There's gotta be different hard parts. Whats the compression ratio on both engines?

whitedragon · 12-02-2007, 10:30 AM

I have a 3.5L DOHC 6G74 Pajero motor in my 98 SL. I'm using my stock ecu. John Monnin I believe has a page that says everything you need to do to drop the motor in. The 3.5 6G74 Block is the same for the debonair and pajero I believe. Xwire did the swap for me.

The ECU does not care what kind of block is in the car, it just tries to adjust so that it sees what it wants to see. Should be just fine with your stock ECU. Mine is.

11-30-2007, 09:22 AM	#11 (permalink)
iufan4lifeul New User - Please be kind Join Date: Dec 2006 Location: louisville Drives: Mitsubishi Lancer Trader Rating: (0)	Re: NA 3.5L discussion I am also interested in this swap. It is for my friends car we are building. He has a 5 speed SOHC. We are looking at the JDM 6G74 and then getting some custom cams ground as well as running emanage or something. He currently has an intake and a testpipe back 2.5" exhaust. Probably port and polish the head as well. Just wondering what you all thought of this. It would be pretty cheap to do before we put it in the car. It would be a 100% NA motor. No nitrous, turbo etc. Would anything else be worthwhile? High compression pistons (if they are even made) etc.?

11-30-2007, 09:34 PM	#13 (permalink)
3g3000gt Forum Member Join Date: Feb 2007 Location: Winter park, Florida Drives: 1994 3000gt Trader Rating: (1)	Re: NA 3.5L discussion no the bracket by the alternator or something I got a guy on FL3S willing to make then. I'm serious about this swap. What are you tuning with? __________________ Tony

12-01-2007, 08:20 PM	#15 (permalink)
3g3000gt Forum Member Join Date: Feb 2007 Location: Winter park, Florida Drives: 1994 3000gt Trader Rating: (1)	Re: NA 3.5L discussion Anyone know about the ECU options???? It will take me a while to gather everything I need, but Christmas is coming up and I can get a free pass to buy stuff from the wife for myself. Will Emanage be enough? Which ECU should I use? Will my current harness fit the jdm debonaire or pajaro ECU since it works on the GT???

12-02-2007, 07:30 AM	#17 (permalink)
3g3000gt Forum Member Join Date: Feb 2007 Location: Winter park, Florida Drives: 1994 3000gt Trader Rating: (1)	Re: NA 3.5L discussion Wikipedia under 6g74. That would be the Montero. the Debonair is 260. Same engine different ECU. that's why I have my questions. If it's just a matter of the ECU's timing/fuel/air maps then I can use the 6g72 ECU(incase they don't send me one) for a more aggressive base map and use my Emanage to bump up timing and control the injectors and so on and so on.

12-02-2007, 09:11 AM	#18 (permalink)
1Forest1 Isnt this a CAR SITE? Join Date: Jun 2006 Trader Rating: (0)	Re: NA 3.5L discussion I would not assume that it is simply the ECU making an additional 55HP. There's gotta be different hard parts. Whats the compression ratio on both engines?

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12-02-2007, 10:30 AM	#19 (permalink)
whitedragon STL3S Join Date: Sep 2005 Location: St. Louis Drives: 98SL 3.5L Trader Rating: (3)	Re: NA 3.5L discussion I have a 3.5L DOHC 6G74 Pajero motor in my 98 SL. I'm using my stock ecu. John Monnin I believe has a page that says everything you need to do to drop the motor in. The 3.5 6G74 Block is the same for the debonair and pajero I believe. Xwire did the swap for me. The ECU does not care what kind of block is in the car, it just tries to adjust so that it sees what it wants to see. Should be just fine with your stock ECU. Mine is. __________________