3000GT VR-4 Power in a Montero Sport
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Post by vr4madness on May 31, 2017 21:46:54 GMT -5
I have been pondering this from the day I bought my Montero Sport. The engine breaking down and needing a re-build is an eventuality. Even if it takes 400,000 miles to happen. So I was thinking about making some real power out of this motor if I have to re-build it, and it would be relatively easy. The answer is to literally swap most of the parts from a 3000GT VR-4 over to the 3.5L block. Believe it or not, a good number of people in the 3000GT/Stealth community swap out their 6G72 3.0L Motor for the 6G74 3.5L motor we have in our Montero Sports. The best part about the swap is that most everything is direct bolt on between the two. I would use the everything from the heads and up from a VR-4 and use the 3.5L block in the MS. Anything like the oil pan, oil pump, etc can stay as it is since it is staying in a Montero Sport. I should even be able to use the same intake manifold from the MS as the 3000GT intake manifold wouldn't work correctly for the motor orientation of a MS. The exhaust manifold from a VR-4 would bolt up too, giving you the option to make the MS twin turbocharged giving you the base 320 hp and 315 lb/ft torque of a VR-4. In fact, it should be more given the 3.5L displacement. I would use the stock 9B turbos from a VR-4 because they spool quickly. I feel like less turbo lag would be better in an off-roading application. But you can tune the car, up the boost fairly easily and safely get 300AWHP. I think the most AWHP produced on stock turbos for a 3000GT VR-4 is around 370AWHP. This was on a 3.0L block too. Obviously it would be good to get a forged crank, pistons, and rods. I wouldn't trust the stock internals of a MS to handle this kind of power. You can use an EVO X map sensor and an EVO 9 MAF (direct bold on) and tune using EVO scan. Since the ECU is OBDII, you should be able to flash it. Here is a good write up from 3SI: www.3si.org/forum/f35/my-6g74-3-5l-swap-webpage-240131/I think that it would be pretty awesome to have an MS that could romp on some of the sports cars out there. Not to mention you can go anywhere you want with the thing. Oh but I dream... -Aaron |
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Post by dirk on Jun 1, 2017 5:57:02 GMT -5
Trust me when I first got my MS, I was thinking about the exact same thing minus the 3.5 since me is a 3.0. Not saying that it's impossible, but spacing under the hood is completely different. The ecu etc I'm sure would have to be changed. Also the intake would have to be swapped also to allow the turbo? Space constraints and placement of stuff would have to be moved also? And the DOHC mitsu 3.0s at least were known to need work more often. Where as dependabilty was designed into the MS more than performance. I'd love to see it done though and if easily copyable I'd love to try it myself lol
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Post by vr4madness on Jun 1, 2017 12:02:30 GMT -5
Trust me when I first got my MS, I was thinking about the exact same thing minus the 3.5 since me is a 3.0. Not saying that it's impossible, but spacing under the hood is completely different. The ecu etc I'm sure would have to be changed. Also the intake would have to be swapped also to allow the turbo? Space constraints and placement of stuff would have to be moved also? And the DOHC mitsu 3.0s at least were known to need work more often. Where as dependabilty was designed into the MS more than performance. I'd love to see it done though and if easily copyable I'd love to try it myself lol Good point about the intake manifold, it would have to be from the VR4 to accommodate a turbocharger setup. I am not sure that spacing would be an issue. You would probably want to relocate the battery to the trunk, and might have to move some of the reservoirs to make it fit. The reliability of the 3000GT is seen as bad, though, I think that is in part due to the customer base that was/is drawn to it. People push them very hard, very often. My first 3000GT had 129,000 miles on it with zero issues. My current one doesn't really help the statistic because it only has 44,000 miles on it. In any case, you would still lose some reliability. But I think that it would be a very cool build. I wonder if you could use an ECU from a VR-4. Not sure how that would work. Might have to get a full blown aftermarket ECU which isn't cheap.
One cool thing you could do is just swap a 2nd generation or newer 6G72 shortblock into your car. Everything else should just bolt up. That way you would have the forged crank and stronger rods and pistons designed for boost in your Montero Sport. Though, the compression ratio is designed for a turbo setup. But it still might be kind of cool. You could always go with a single turbocharger setup.
I would have to wait until my engine failed before I would attempt anything like this. If my motor holds up to 250,000 + miles, it is going to be a very long time. I think I put about 300 miles on my Montero Sport since I owned it. A lot of those miles were from my excitement of having a new toy. So I don't expect to put much more than 3,000 miles on it a year.
It is too bad we don't live closer, it would be fun to get a Montero that has already blown a motor and just play with this idea on it. I would wrench on it every weekend! Plus, we would still have our "normal" Montero Sports to plunk around it while we figure this whole thing out.
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Post by dirk on Jun 1, 2017 19:17:34 GMT -5
Yeah, I live pretty much in middle of no where up here in NY, I'm probably about 3 hour drive from the next closest MS lol
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Post by cwic on Jan 5, 2018 12:25:14 GMT -5
I have been pondering this from the day I bought my Montero Sport. The engine breaking down and needing a re-build is an eventuality. Even if it takes 400,000 miles to happen. So I was thinking about making some real power out of this motor if I have to re-build it, and it would be relatively easy. The answer is to literally swap most of the parts from a 3000GT VR-4 over to the 3.5L block. Believe it or not, a good number of people in the 3000GT/Stealth community swap out their 6G72 3.0L Motor for the 6G74 3.5L motor we have in our Montero Sports. The best part about the swap is that most everything is direct bolt on between the two. I would use the everything from the heads and up from a VR-4 and use the 3.5L block in the MS. Anything like the oil pan, oil pump, etc can stay as it is since it is staying in a Montero Sport. I should even be able to use the same intake manifold from the MS as the 3000GT intake manifold wouldn't work correctly for the motor orientation of a MS. The exhaust manifold from a VR-4 would bolt up too, giving you the option to make the MS twin turbocharged giving you the base 320 hp and 315 lb/ft torque of a VR-4. In fact, it should be more given the 3.5L displacement. I would use the stock 9B turbos from a VR-4 because they spool quickly. I feel like less turbo lag would be better in an off-roading application. But you can tune the car, up the boost fairly easily and safely get 300AWHP. I think the most AWHP produced on stock turbos for a 3000GT VR-4 is around 370AWHP. This was on a 3.0L block too. Obviously it would be good to get a forged crank, pistons, and rods. I wouldn't trust the stock internals of a MS to handle this kind of power. You can use an EVO X map sensor and an EVO 9 MAF (direct bold on) and tune using EVO scan. Since the ECU is OBDII, you should be able to flash it. Old post but some insight from the top. Most of the parts from the 3kgt will not swap over as the MS engines are not being used for the 3.5L 3kgt builds as it is not transverse orientated, but some of the intake and heads stuff has been done for a super sharger. See... msport97.proboards.com/thread/8479/supercharged-dohc-montero-sport?page=1. I would imagine with the 3.5L the 9b turbos would choke off the engine since they would spool right now and the manifolds from the 3kgt would be problematic since they are designed for a different engine orientation. I had RPW long tube headers on my MS but those would not work for a tt application either. You would deff need new pistons and rods with the wide ends Ray P sells since there would be so much torque but the crank in the 3.5L is forged which is why I am kicking myself for trading my MS and not parting it out. That crank in the 3.0L 6g72 makes it a it a 3.2L stroker. The biggest problem IMO is the MS trans. It is weak, mine was failing from the few occasions I used my 100shot. You would need to rework the valve body and torque converter or convert it over to a manual thought some of the products from IPT. I loved modding my MS cause no one was doing it when I was but I was not blessed with money or wrenching space/talent so when the truck started rusting and the trans started slipping I had to part ways. Clay |
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Post by vr4madness on Jan 5, 2018 13:08:19 GMT -5
I have been pondering this from the day I bought my Montero Sport. The engine breaking down and needing a re-build is an eventuality. Even if it takes 400,000 miles to happen. So I was thinking about making some real power out of this motor if I have to re-build it, and it would be relatively easy. The answer is to literally swap most of the parts from a 3000GT VR-4 over to the 3.5L block. Believe it or not, a good number of people in the 3000GT/Stealth community swap out their 6G72 3.0L Motor for the 6G74 3.5L motor we have in our Montero Sports. The best part about the swap is that most everything is direct bolt on between the two. I would use the everything from the heads and up from a VR-4 and use the 3.5L block in the MS. Anything like the oil pan, oil pump, etc can stay as it is since it is staying in a Montero Sport. I should even be able to use the same intake manifold from the MS as the 3000GT intake manifold wouldn't work correctly for the motor orientation of a MS. The exhaust manifold from a VR-4 would bolt up too, giving you the option to make the MS twin turbocharged giving you the base 320 hp and 315 lb/ft torque of a VR-4. In fact, it should be more given the 3.5L displacement. I would use the stock 9B turbos from a VR-4 because they spool quickly. I feel like less turbo lag would be better in an off-roading application. But you can tune the car, up the boost fairly easily and safely get 300AWHP. I think the most AWHP produced on stock turbos for a 3000GT VR-4 is around 370AWHP. This was on a 3.0L block too. Obviously it would be good to get a forged crank, pistons, and rods. I wouldn't trust the stock internals of a MS to handle this kind of power. You can use an EVO X map sensor and an EVO 9 MAF (direct bold on) and tune using EVO scan. Since the ECU is OBDII, you should be able to flash it. Old post but some insight from the top. Most of the parts from the 3kgt will not swap as the MS engines are not being used for the 3.5 3kgt builds as it is not transverse orientated. but some of this had been done. See... They do in fact use the 6G74 block in the 3.5L swaps for the 3000GT. My good friend is doing this swap. Bored the block to 4.0L and is running some crazy numbers. www.3si.org/forum/f35/my-6g74-3-5l-swap-webpage-240131/#/topics/240131en.m.wikipedia.org/wiki/Mitsubishi_6G7_engineApplications 1992–1998 Mitsubishi Debonair (Japan) (256HP) 1993–present Mitsubishi Pajero (a.k.a. Montero/Shogun)(Only available in GCC area now) 1997–2004 Mitsubishi Diamante 1999-2001 Mitsubishi Proudia 1999–2005 Mitsubishi Magna/Verada 1999–present Mitsubishi Pajero Sport/Mitsubishi Challenger 2005–present L200/L200 Sportero (Japan, General Countries) 2008–present Mitsubishi Triton (Japan Domestic, Thailand, Brazil and Middle East) |
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Post by cwic on Jan 5, 2018 13:35:30 GMT -5
They do not for a few reasons. No Montero sport at least in the us had DOHC they were all SOHC. The monteros had DOHC. Brackets for mounting to frame, transmission mounts, pullies ETC are different. The routing and inlets for the cooling and oiling system are different as well. It may be possible but it is the hardest 3.5L block to convert since it did not have DOHC and did not sit side ways in the engine bay. Clay |
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Post by cwic on Jan 5, 2018 15:55:35 GMT -5
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