Turbo a 2nd gen.

KALSC · 12-10-2002, 01:41 AM

At first you probably thought this was someone else going to ask how to go about adding a turbo to a 2nd gen Max. Well, I am almost done the conversion, and let me tell you, it isn't an easy task. I had started to post pictures awhile back but deleted the thread as I got grief from a couple people. Anyway, whoever tells you that it is a simple little swap, forget it. Oh sure the easy way out is to pay a shop to do it all for you, but who really has that kind of money to play with??? I took some of the money that would have gone to a shop and my cams ground to a better profile suited for a turbo profile. Aside from some of the obvious issues (intake, etc.) there are a whole series of little trinkety things to consider as well. For those of you who are interested, I will be following this thread up later this week with a link to a site where I will be posting all the pics and details of the swap. All I can say is it most certainly isn't a simple bolt on procedure of swapping parts. As an example, you have to have the stock Max oil pan modified to accept the oil drain back from the turbo. You have to fabricate a custom motor mount for the front side. There are several plugs (tps, airflow meter, AIC, ACC, etc.,) that all have to be lengthened . . . considerably, the knock sensor barely fits beside the read motor mount . . . and I mean barely, and the exhaust routing is a major issue. The turn down that mounts on the turbo while in the 300ZX does not work in the Max, if you try, it plows right into the starter, so there is some major fabricating needed there, as well, the steel inlet tube for the turbo works great to clear the alternator but totally interferes with the A/C compressor. And the list goes on. As someone else stated, if you have enough money, anything is possible. I am trying to do this swap to demonstrate that it doesn't need to cost a truck load of coin, but that it does take quite a bit of effort. I am almost done and as mentioned above, I will post a link later this week to all the pics and details. Hopefully this will help some people out.

**max95q** · 12-10-2002, 08:07 AM

I will be keeping up with your progress as well and let me know when the site is up Ill post a Sticky for it for the forum.

*maximase86* · 12-10-2002, 10:23 AM

Finally!

I've been waiting to see if someone was going to do the turbo! I can't wait till I see the pics. What are you seeing in terms of cost so far?

Sarin

KALSC · 12-10-2002, 10:44 AM

I will have a rough breakdown on the site when I post the link. It isn't too bad really. I incurred extra expense in have my cams re-ground, having my heads rebuilt, having the crank ground, etc., etc. But one will be able to discern between the costs as it will all be broken down.

*maximase86* · 12-10-2002, 01:30 PM

Quote:

Originally posted by KALSC
I will have a rough breakdown on the site when I post the link. It isn't too bad really. I incurred extra expense in have my cams re-ground, having my heads rebuilt, having the crank ground, etc., etc. But one will be able to discern between the costs as it will all be broken down.

Hell, I know a bunch of the guys in the Sec gen group on yahoo will want to see this too. You should join.

http://autos.groups.yahoo.com/group/...nnissanmaxima/

In fact all second gen. owners should check that out too. Great resource there as well as here, just be sure you don't get the other second generation maxima group on yahoo, with the green and white color scheme. The guy that runs it is a complete *******, hell I bet ya Q can vouch for that.

Sarin

*GundamWZero* · 12-12-2002, 12:49 AM

I thought that you can just change the manifolds, or headers, or something? I know that I inquired about this before and it was said that swapping the VG30 with the VG30T (along with the ECU and timing and such)was all it took. Am I wrong or you have to really change the entire engine?

KALSC · 12-12-2002, 01:03 AM

Well, it's like I said, I too had heard about a lot of speculation regarding the swap and it seemed as though no one had really performed it (the swap). So, that being said, if you want to do it right, then you really should either get a turbo motor or build up a real turbo motor. If you study how turbo motors are built, for the street and daily drivers, you will see that they are typically lower compression engines. If you take a higher compression engine (like the stock Maxx motor) and slap a turbo on it, not only will you suffer from gross detonation, but you have to really watch the psi your turbo pumps out, can you say blown head gaskets to name a few? Also, you can play around with higher boost levels as easily either. One thing I think most guys overlook too is the oil pan modification needed. Oil is fed to the turbo cartridge, but, how is it supposed to get back to the pan??? On the 300ZX the pan has a drain back spout that hooks up to the drain back spout on the turbo. So you have to take a stock Maxx oil pan and install (weld) one of these drain back spouts to mate up with the one on the turbo. Also, like I mentioned, the intake tube for the turbo is a real P.I.T.A. It bends right up into where the A/C compressor goes. Sure you can ditch the compressor, but then what, no air? If you ditch the compressor you can use a longer belt to wrap around the alternator but the belt contact patch is diminished and that is something you don't want to do on an alternator. Also, as mentioned, the exhaust is another butt ugly snake. The stock 300ZX exhaust down spout slams right into where the stock Maxx starter is, so you have to take that piece, cut it a certain way (you will see pictures) and then weld up the new exhaust pipe to wrap down and around to mate up with the stock Maxx flex-pipe. Dude, the list goes on and on and on. Like I said in my original post, there is a hell of a lot more to this swap than just changing the intake and exhaust manifolds, trust me. In other words, don't count on it being a nice and tidy weekend project.

Hope this helps a little. I am on target for getting the site ready and posting the link here, no worries guys, it's coming. I am just fighting with rebuilding my cv joints right now. The boots were showing signs of wear so I figured while I had them out I might as well clean then up, re-grease them and put new boots on. Messy, messy, messy.

KALSC · 12-14-2002, 12:44 AM

Well, here is the link to the site where I will be documenting the VG30ET swap. I haven't posted anything yet, there is an explanation at the site. You would do good to visit the link and then bookmark it as well.

http://www.sqntech.com/maxima/

KALSC · 12-18-2002, 12:30 AM

I posted the link last week, today I finally had a chance to publish some of the text and pictures. There will be many updates to the site and it will be revised often. Feel free to shoot me any questions you have. Cheers!!!

Nismo87SE · 12-18-2002, 01:27 PM

That is an awesome page. It looks like you ran into issues and had good success in fixing them. Also are you going to use the Z31 ECU? If you do it is the same except that you will need to add a wire to pin #29 for the detonation sensor. Other than that its plug and play.

Quote:

Originally posted by KALSC
I posted the link last week, today I finally had a chance to publish some of the text and pictures. There will be many updates to the site and it will be revised often. Feel free to shoot me any questions you have. Cheers!!!

KALSC · 12-18-2002, 03:28 PM

There is A LOT more information and pictures to come. As for the ECU, for now I will be using the Z31 ECU and running the wire. Eventually I am going to install near the same ignition system I did on my 5.0. I bought a Boost Timing Master from MSD and love it. You can adjust the amount of retard via an in-cabin dial which is relative to each pound of boost, so I have total control over the ignition retard. That will be in the spring, so for now, the stock Z31 ECU it is. Once I start playing with the boost though, then comes all the rest of the goodies!

*Sprint™* · 12-18-2002, 05:11 PM

check your private messages

*DA-MAX* · 12-18-2002, 07:39 PM

dude GREAT WORK!!!!!

and gret job on the documentation, it always helps to have pics and a writeup! I'm helping Max O/D with this same swap into a 3rd gen, we are almost done...check out some of our pics on Turbomaxima.com

I have one question if you don't mind...
do you have any pics of the oil pan and where you welded the return bung?? not even really pics but maybe a measurement of how far down from the top of the pan it should be welded on.

Great job man, and you are right its not an easy job, from helping out Jahlil I've realized once the motor is in and all that its the little things that catch up with you!! BEST OF LUCK can't wait to see the final product!!!!

KALSC · 12-18-2002, 08:39 PM

As for exact measurements, I don't have any. What I did was a mock up of the Maxima oilpan with the turbo mounted and then pinpointed the exact location needed for the bung. I then took the pan off, cut the hole and welded the bung on. I will try and take some better close-ups for the site.

Also, you are dead on when you say, and I said, this isn't as easy as it looks. It isn't no plug and play, it isn't no bolt on swap, and it sure as heck isn't a weekend project.

Once complete, it will look like a factory install. Once I get all the bugs worked out and have it running ultra-reliable, then comes the performance hop-ups and eye candy. :-)

surfermax92 · 12-18-2002, 08:43 PM

Wow, way to go! I wanted turbo, but it was all of the little things that made me go for a NA build. Hopefully you can inspire others to follow what you've done.
BTW, did you get the block O-ringed and install a copper head gasket? Because with that set-up the max's 9:1 compression won't be a problem at all for the turbo. Also, could you just use the z31's oil pan? or will it not fit under the car?

KALSC · 12-18-2002, 09:13 PM

The blocks between the VG30E and the VG30ET are the same. What I did was locate an actual 300ZX turbo engine and rebuilt it, thereby using the dished pistons and retaining the stock turbo spec. compression. Yes you can griive the heads and use the ringed head gastkets, but that doesn't solve the SERIOUS detonation problems when using a higher compression engine with forced induction. For this round, I chose to rebuild with a stock set up AND THEN start adding the goodies(boost timing master, intercooler, hybrid turbo, higher boost levels, BOV, external wastegate, etc.). It's that some old attage, start with something you know and then make one change at a time otherwise if things go south, you won't know what change screwed things up, especially considering this is fairly untouched territory in that not to many other people have done this with the 2nd gens. Better to be safe than sorry for now. As I progress in adding the goodies, I will for sure keep the site updated.

The Z oilpan will not fit due to the lower brace the Max's use, AND because of the way the exhaust is routed on the Max. The rearward (relative to the front of the engine) recess in the Max pan is where the brace and exhaust slip through. If you put the Z pan on, the brace won't fit (you'd need a custom solution) and you would really have trouble routing the exhaust.

Nismo87SE · 12-18-2002, 11:08 PM

You won't need a BTM with a Z31T ECU, it would cause you to lose power rather than gain it. Given intake, 3in exhaust from the turbo back and 11-13psi the car should make 210-218whp. Since you have cams and hopefully headwork you should see 228-245whp. After that you get close to maxing out the stock injectors, fuel pump and MAF. If you want more power your going to have to go stand alone or JWT. You can get the upgrade info here http://z31.com/tfaq/.

Quote:

Originally posted by KALSC
The blocks between the VG30E and the VG30ET are the same. What I did was locate an actual 300ZX turbo engine and rebuilt it, thereby using the dished pistons and retaining the stock turbo spec. compression. Yes you can griive the heads and use the ringed head gastkets, but that doesn't solve the SERIOUS detonation problems when using a higher compression engine with forced induction. For this round, I chose to rebuild with a stock set up AND THEN start adding the goodies(boost timing master, intercooler, hybrid turbo, higher boost levels, BOV, external wastegate, etc.)

*maximase86* · 12-18-2002, 11:18 PM

Quote:

Originally posted by surfermax92
Wow, way to go! I wanted turbo, but it was all of the little things that made me go for a NA build. Hopefully you can inspire others to follow what you've done.
BTW, did you get the block O-ringed and install a copper head gasket? Because with that set-up the max's 9:1 compression won't be a problem at all for the turbo. Also, could you just use the z31's oil pan? or will it not fit under the car?

When your done with the 85, you wanna do an 86?

Sarin

KALSC · 12-19-2002, 12:02 AM

Sure! I am having fun with this. The cool part about this is that if I do any other 2nd gens, they will be a heck of a lot easier to do since all the funny stuff will be sorted out.

MaxWgn · 12-19-2002, 07:28 AM

You could probably make some extra cash by offering some of the 'fabbed' parts needed for sale. Like, making the modified mount and oil pans, etc..., that you needed to build, and selling them to those who are interested...since you already have the information at hand.

x_x_maxima_x_x · 12-19-2002, 04:48 PM

whats up people.. i had baughten a 87 nissan maxima.. and i want to fix it up... i have been in contact with the people at swapjdm.com and thay set me to this site.. and i dont know anyone who actually likes maximas besides me.. but this is perfect that i found a site for maximas.. and i was told that a vg30et would fit in my car almost perfect.. cause from what i'm told that the vg30dett will not fit correctly and i love the maxima.. but i'm used to fixed up hondas.. and as soon as i got my maxima i fell inlove with it.. and now the max is the only import i'll drive now.. now i really need help if anyone can please help me cause i want to turbo my maxima.. but dont know if i should find a vg30et or fabricate a turbo onto the car..

*maximase86* · 12-19-2002, 07:36 PM

Quote:

Originally posted by x_x_maxima_x_x
whats up people.. i had baughten a 87 nissan maxima.. and i want to fix it up... i have been in contact with the people at swapjdm.com and thay set me to this site.. and i dont know anyone who actually likes maximas besides me.. but this is perfect that i found a site for maximas.. and i was told that a vg30et would fit in my car almost perfect.. cause from what i'm told that the vg30dett will not fit correctly and i love the maxima.. but i'm used to fixed up hondas.. and as soon as i got my maxima i fell inlove with it.. and now the max is the only import i'll drive now.. now i really need help if anyone can please help me cause i want to turbo my maxima.. but dont know if i should find a vg30et or fabricate a turbo onto the car..

The VG30DETT is a too wide, you would have it up against the firewall and radiator. Though it you made modifications to both it might work, because all the stuff that is around the firewall, you don't want to **** with it. Your better off with just a VG30ET.

Sarin

KALSC · 12-19-2002, 08:35 PM

As the saying goes, money can solve a lot of issues. If you have a decent amount of coin and want a trick looking set up and good performance, do the custom mod and trick it right out. BUT, if you want pure performance and aren't worried about good looking items that make you go any faster, invest that saved money into the go-fast parts. What's neat to is A LOT of people are running insane amounts of power through stock bottom ends on both imports and domestics. You don't have to spend huge dollars on the forged cranks and "H" beam rods, blah, blah, blah, unless of course you are a serious racer where the needs warants such expense and high torture reliability. Anyone ever hear of the guy who built up a stock 351W for his Thunderbird and did a custom TWIN supercharger set up and was running insane quarter miles??? No??? Check out this link, http://www.toohighpsi.com/SCTC/sctc.htm (be sure to check all the buttons on the menu, lots of good info there). That makes my point about stock parts (in good shape) can make good on the street too. I know that link has nothing to do with our Maximas, but it's the principle behind what those guys are doing. Ultra cool! The link to thier main page is http://www.toohighpsi.com. Enjoy.

KALSC · 12-19-2002, 10:26 PM

Hi everyone! I just wanted to remind everyone to keep checking the site where the info is. I am making almost daily updates with pictures and text. Things are moving along swiftly now as I am nearing completion. I have set up a new interface for the site, it should make it a little more user friendly! Cheers!

*DA-MAX* · 12-20-2002, 12:11 AM

KALSC, about the radiator fan setup...what are your plans for that?? just run one stock fan, will that be suffient? Me and my friend ran into the same problem doing this swap on his 3rd gen, the compressor hit the fan shroud. we decided to swap in a custom mounted 16" slim-line puller fan which will cover the left/driver side half of the radiator, do you fore see any possible "daily driver" issues with a single fan setup like this??(especially come summer time)

Thanks for any suggestions.

KALSC · 12-20-2002, 12:17 AM

Well, from what I have been able to tell, the second, smaller fan only ever came on when the A/C was on and the ambient temperatu