3rd Generation Maxima (1989-1994) Learn more about the 3rd Generation Maxima here.

J30 engine

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Old Mar 18, 2007 | 03:34 PM
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J30 engine

today i was at the junkyard and i came across an Infiniti J30 that got rear ended and was junked but when i opened the hood the engine was still in tact. clean as hell which made me want to pull the sucker and take it home. i know someone on here did the head swap from single cams to twin cams in the VG motor but don't think he commented too much about it to see if it was even worth doing it. now do any of you guys think its worth doing that swap or just leave it alone? also i have a complete VQ motor on my engine stand and im thinking about rebuilding it and just sell it with the spare tranny that i have for it but at the same time debating to swap it into my car? but thats not my concern right now since i know it takes a bit of modding to make it work right and fit right. now what i really want to do is get another VG motor and just build it so i can put my turbo on. i want to know what parts i can use to get the most out of the VG? what pistons, rods, crank, etc...?
Old Mar 18, 2007 | 06:48 PM
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hey i have a dead 93 gxe..tranny blew...car needs too go..let me knoe if interested..more info on the car..pmm me...
Old Mar 18, 2007 | 07:08 PM
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head swap from VG30E to VG30DE? WRONG. can't happen.

start over and speak english.
Old Mar 18, 2007 | 07:15 PM
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port, polish, cams or turbo setup. Z31 bolts right on.

I thought you could swap on the DE heads when I joined the org, and yea it wont happen..

Or just save up and finish that VQ swap...

~Alex
Old Mar 19, 2007 | 08:43 AM
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Originally Posted by Matt93SE
head swap from VG30E to VG30DE? WRONG. can't happen.

start over and speak english.
what i meant to say can the heads be swapped over from E to DE? apparently you said "no" so i will let that rest but how come a "member" on here did it with modifying some components to make the heads fit? i think it was nismo1989 or something like that who did it. now u know more about engines than i do Matt. what aftermarket internal parts can i use to gain more power on the VG?
Old Mar 19, 2007 | 08:48 AM
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Originally Posted by Alex_V
port, polish, cams or turbo setup. Z31 bolts right on.

I thought you could swap on the DE heads when I joined the org, and yea it wont happen..

Or just save up and finish that VQ swap...

~Alex
i already have the turbo itself. i will use another VG motor so that i can build it. what i want to do is rip the whole motor apart and install aftermarket parts to get the full potential out of the VG. what parts can i use or modify. the VQ would be a nice swap but i can't afford to have the car down a for a long time just to make sure everything works right. once i rebuild the VQ i will sell it with the spare auto tranny that i have.
Old Mar 19, 2007 | 09:31 AM
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Originally Posted by GRNMAXDMON
what i meant to say can the heads be swapped over from E to DE? apparently you said "no" so i will let that rest but how come a "member" on here did it with modifying some components to make the heads fit? i think it was nismo1989 or something like that who did it. now u know more about engines than i do Matt. what aftermarket internal parts can i use to gain more power on the VG?
If he said he did it, he's lying.
The VG30E has like 13 head bolts per head. the VG30DE "only" has 8 or 10.
the head gaskets don't line up, the timing covers won't line up, the tensioner studs, cooling passages, water pump, and other stuff don't line up.. it's impossible to do it without MAJOR machine work. and at that point, it's useless since it would be easier to take a DE block and build it.

But that gets into the fact the freaking DE engine won't fit inside the engine bay by the time you put the exhaust manifolds and everything on it. there's about 2" between radiator and firewall with NO exhaust manifolds, wiring, or emissions tubing.

so you're better off going with a built VG30E or VE30DE. both can be built for the right money to put out some incredible power.
Old Mar 19, 2007 | 09:32 AM
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Originally Posted by GRNMAXDMON
i already have the turbo itself. i will use another VG motor so that i can build it. what i want to do is rip the whole motor apart and install aftermarket parts to get the full potential out of the VG. what parts can i use or modify. the VQ would be a nice swap but i can't afford to have the car down a for a long time just to make sure everything works right. once i rebuild the VQ i will sell it with the spare auto tranny that i have.
If all you want to do is rebuild the engine, then just use internal parts for a Z31 engine (VG30E). everything will bolt right in from rods, pistons, cams, etc...
throw some rods, pistons, and cams in it and turbo it, and you have potential for 500hp right there without any other major work. but at that point, you'll be blowing up transmissions every time you hit the gas.
Old Mar 19, 2007 | 11:54 AM
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so whats the best thing to do? do i just keep the internals stock and just slap the turbo on and call it a day.
Old Mar 19, 2007 | 12:35 PM
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I'm new herre and was wondering the same thing. Can the Z31 VG30de be swapped and turboed in a 3rd gen max? What's best?
Old Mar 19, 2007 | 12:36 PM
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Originally Posted by GRNMAXDMON
so whats the best thing to do? do i just keep the internals stock and just slap the turbo on and call it a day.

Thats what a few ppl have done with success.
Old Mar 19, 2007 | 12:38 PM
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Originally Posted by avusilvia
I'm new herre and was wondering the same thing. Can the Z31 VG30de be swapped and turboed in a 3rd gen max? What's best?
Please read the content of this thread before repeating a question.
Old Mar 19, 2007 | 12:46 PM
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Z31 never had the VG30DE in the U.S. Just keep the VG30E and turbo it. It'll make plenty of power on stock internals.

If you're looking to make an extremely fast 3rd gen... your absolute best bet would probably be to go with a built auto tranny or get different gear sets for the 5-speeds that are being built. Either way, you're looking at spending roughly $1,500++++ to get the tranny capable of handling the power the stock engine is capable of producing with a turbo setup. Yeah... we got extremely screwed with our insanely weak transmissions.
Old Mar 19, 2007 | 12:54 PM
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Originally Posted by mtcookson
Z31 never had the VG30DE in the U.S. Just keep the VG30E and turbo it. It'll make plenty of power on stock internals.

If you're looking to make an extremely fast 3rd gen... your absolute best bet would probably be to go with a built auto tranny or get different gear sets for the 5-speeds that are being built. Either way, you're looking at spending roughly $1,500++++ to get the tranny capable of handling the power the stock engine is capable of producing with a turbo setup. Yeah... we got extremely screwed with our insanely weak transmissions.

Even the VE tranny's won't take it???
Old Mar 19, 2007 | 01:10 PM
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The VE and 4/5gen 5spd trannies are all the same internally. the VE was lucky enough to get VLSD factory. 4/5 gen not so lucky.

point being, they have a tendency to break gears above 300hp- less if you beat on them like I do...... I broke 1st gear in mine a few months back...

the VE/VQ tranny is a farsight better than the VG tranny, but it's still not bulletproof.
Old Mar 20, 2007 | 10:30 AM
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So then the ultimate answer is to just get the internals to the stock 5sp tranny beefed up or get a vq tranny swap. I've heard it being done on 91-93 sentra se-r's but not Maxima's.
Old Mar 20, 2007 | 10:44 AM
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The VE tranny is bolt on for a VG. bellhousing is the same pattern, everything lines up. 1 day swap for it.
Old Mar 20, 2007 | 05:10 PM
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Originally Posted by Matt93SE
The VE tranny is bolt on for a VG. bellhousing is the same pattern, everything lines up. 1 day swap for it.
Don't forget about the axles and front hubs too.
Old Mar 20, 2007 | 05:24 PM
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Yeah... we got extremely screwed with our insanely weak transmissions. [/QUOTE]
yeah we did
Old Mar 20, 2007 | 06:19 PM
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Originally Posted by Kountz430
Yeah... we got extremely screwed with our insanely weak transmissions.
yeah we did[/QUOTE]

Just thinking... I tore up 2 vg trannys both under 130,000 beyond repair. Picked a ve tranny with 290,000 with 7 different owners, fluid was riddled with metal flakes, input bearng half gone. Changed that one bearing, good as new.
Old Mar 21, 2007 | 11:39 AM
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Originally Posted by Chris Gregg
Don't forget about the axles and front hubs too.
It's still a bolt on. the details are listed in the FAQ and searchable in about 15 different places. not going to mess with it other than to say it's a bolt on.
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