Interesting, yeah I haven't seen turbos with the maf on the charged side, but I've seen S/C car with it on the charged side. I figure I'd ask. The BOV I'm wanting right now is a HKS SSQ BOV. It's a high pitch whistle like sound to it which I absolutely love....but would hate to get it and find out I need to put a recirc kit on it. Either way, we'll have to see. Also, are you running any gauges? If so where did you mount them. My plans are at least Fuel Pressure, EGT's, and Vacuum/Boost.

S

I am running a fuel pressure gauge and a vacuum/boost gauge. I was going to put in an air/fuel ratio gauge but Autometer doesn't make one in the gauge series I chose. I made a custom mounting plate and the gauges are mounted in the center dash when the e/q was. The radio system crapped out long ago and that bay is perfect for three gauges.

Were you going to run a wideband O2 with the a/f gauge? I remember hearing that the A/F gauge it self wasn't as accurate as one with a wideband O2. That was pretty much my reason to go with EGT's instead. I was thinking of maybe getting a custom gauge cluster for the A-piller (I think that's what it's called)...but I'm also thinking of that little storage thing under the ashtray too.

S

how the hell do u post a pic in thread!!

hmm what would you guys think of a turbo second gen wagon. I picked up an 88 300zx with a good vg30et. I am quite tempted to have it installed in mysedan..but a wagon... hmm I would love to see peoples faces when they would see that they got owned by a wagon :O Its a project for the end of this yar or mayve even mid summer. UI understand all the problems and wiring and everything thats there to do with the swap, but well I seen 2 turbo second gens, yours kalsc and a local dude from over here, i think his setup is a bit different but almost the same, yours looks better because you are trying different mods for the z engine. That guy is just stock vg30et. Anywho..would a turbo wagon even be worth the hassle? or should I just make my sedan turbo, the wagons automatic, I would most likely need to make it manual BUT I like the idea of having the only manual and turbop wagon. I dunno..so much to diggest here..

-hec

I think it would be cool to turbo the wagon. It's like you said, the look on peoples faces when they get owned. When people see an older Maxima, they don't think much of it until I blow their freakin doors off! Now, add that up to a wagon?!?!?! LOL! You could totally pimp out the wagon and make it look cool. The right color wheels and tinted windows would go a long way in that department.

Cheers!
KALSC

if u put a tourbo. will it still pass smoge with a stock pcm, or do u have to do crap to the pcm?

In most cases, if you go turbo, you'll be using the stock VG30ET ECU. With that you should still pass emissions. I've still yet to run into a boosted car that wasn't able to pass emissions.

In cali its a little different. If you put an engine in your car it has to be a newer model engine of that same car for it to be legal. I'm not sure what another engine swap would need to be street-legal.

Example:85-88 MAXIMA could use ALL Maxima engine years from 85-04.

im not going to use a vg30et pcm. im planing on sticking with my vg30 pcm on my 85 maxima. and a 300zx t.engine

I guess you could do that if you want to run the risk of running to lean and popping a piton or two. Not to mention the vg30et ECU has the knock sensor circuit to retard timing in the event you start to detonate. I think your nuts to run the stock ECU on a turbo application. Unless of course you have a supplemtental fuel management system to compensate for the increased fuel needs.

Are you planning any fuel management at all? The 300zx Turbo ECU would be needed unless you have some sort of fuel management. I'm planning to use a BEGI/Cartech FMU myself, then might go with a Z31 Turbo ECU. I've even though of maybe having JWT do some programming for it....but that's if I have the bucks to spend when the time comes.

S

oh1 i didn't tack the lean condistion and th pooping.how exsactly em i going do put a vg30et pcm in mn my max. will it plug rigt in or do i have to do some rewiywering?

It plugs right in, with the exception of having to run additional wire for the knock sensor, if you want to utilizde it.

how much hp can our trannys handel

Depends on Auto/Man
Depends if you drive reseasonably/like me.


I don't know exactly, but from what's been posted you should worry about the engine first, if you build it right to celebrate you can fry your old trany. Then get a new one from Level ten or a local shop.

maximase86,KALSC
I'm thinking that if I remove all the AIV crap, that the turbo can be mounted where that crossover is.
Will that work?
Will there enough pressure?

I'm thinking that I will have to get custom headers made and have a place for the wastegate.
KALSC what size are exhaust manifold for the VG30ET?

There is one major problem with doing a single turbo set up with a custom cross-over, you will only get the exhuast feed from the one side of the engine (closest to the firewall). The only way to make this work with a single turbo set up (as you will want ALL exhasut going through the ONE turbine) is to either highly modify the one exhaust manifold to allow exhaust from the 'front' side of the engine to be routed to the cross over. Stock, the exhaust channels from the front and backside are split until the enter the collector.

The reason why the stock, unmodified turbo set up will work with two turbos is that each side of the engine would in turn feed each turbo.

So, long story short you either have to modify the $hit out of the stock trubo manifold to reroute the exhaust gas or have a custom exhast manifold/header made for a single turbo install.

Another option would be to make up a flanged U adapter that would bolt on where the collector is as this would route the exhaust from the front side of the engine back up into the crossover where it would then feed the single trubo along with the ehaust from the backside of the engine. For the single set up on my buddies Max, that is what we are doing.

By the way, I have installed the hogged out 300ZX manifold. Haven't had a chance to test it yet. I am sure it makes a difference otherwise the fellows at z31.com wouldn't be paying $400 USD for it.

Forgot to asnwer the second part, the exhaust manifolds are the same size runners as the stock maxima manifolds, from what I can tell.

Another option would be to make up a flanged U adapter that would bolt on where the collector is as this would route the exhaust from the front side of the engine back up into the crossover where it would then feed the single trubo along with the ehaust from the backside of the engine. For the single set up on my buddies Max, that is what we are doing.

Please tell me you have pics.
How does it preform, does the turbo spool all the way up?
Is the turbo making the power stated?

Well, I can get more than enough boost to make the emergency pop-off valve start to spew! On the new prototype intake I have removed the emergency pop-off valve and am using a two stage solenoid setup. With the flick of the switch I can control the boost pressure.

What about using a 300zx exhaust manifold and intake and just moving the motor mount. The turbo would fit in the 300 stock position. What do you think?

That's what I did. I made a custom motor mount and used the stock 300zx setup. BUT . . . you have to remove one of the cooling fans to make it fit.

Cool I'll start my list of things needed for the swap. And take some notes off your web site. Hey when can we expect some more pictures? I love the stuff you have and it's really helpful but we gotta have more.
I'm hoping to have everything here and ready for installation by December.
Thanx for the help so far man.

Oh yeah are there any small items that you wished that you had bought new to save you some time and money in the long run?
Vaccum lines
Radiator hoses
Heat sheilding

things like that.

I was quite particular when I did the swap, so any wiring harness extensions I had to make up, I wrapped in that black ribbed sheathing, things like that. I used the stock rad hoses, I had a $hitload of vacuum lines laying around so I just cut and used what I needed.

If you do go with the stock 300zx set up, YOU WILL have to remove the drivers side cooling fan, I believe that's the one that kicks in when the air is on. Since I took my air out to make room for two intercoolers, I wasn't worried about the loss of that fan. Also, in going with the stock 300zx set up, the a/c pump won't mount on the stock brakcet and because of how high the 300zx a/c bracket places the a/c pump, the stock a/c lines won't work either. So, as you can see, there are many things to consider in this swap.

Cool
I was going to take out the AC compressor. I can handle taking out the fan on the radiator.
Isn't there going to be a prob with that radiator hoses.
I think that I read you used the stock locations i'll have to double check.
Know of any good places to find a Z31 intake/exhaust manifold. Right now I'm just looking for a Z31 for sale. I figure just use the whole car for parts.
Last question injectors. On the max there low impedence 180 cc right?
For turbo don't they need to be 330cc?

Are our injectors really 180cc? I was under the impression they were somewhere in the neighborhood of 240-270cc, which should be good for up to 8-10psi boost with an FMU or 300zx ECU. I think 330cc might be overkill if your not running a lot of boost. My buddy Ian runs 370cc on his car, even with an JWT ECU program for 370cc injectors, they still can easily flood the motor...but at the same time, he see's about 12-13psi boost from the S/C.

KALSC, were you able to see what kind of duty cycle your getting with the injectors you have now?

As for the setup I personally, want to mount the turbo over the bellhousing of the tranny. I don't want to loose my A/C or screw around with my fans....and for other T/C maxima's, that seems to be the best location.

S

With mounting the turbo using the 300zx config, there are no issues with the rad hoses. I have no idea about the volume of the stock injectors, all I know is that I took a set off of a turbo 300 which looked EXACTLY like the same one my buffy has on his stock Maxima and they work just fine. I did of course use the trubo 300zx ECU.

As for the duty cycle, I have no clue, sorry.

I have a turbo 300 exhaust manifold I have been trying to decide what to do with. It is in GREAT shape and cleaned right up. Offers?

I might be interested....but give me a bit...since I might have another one lined up. Also, what's the scoop on the hogged out IM's?

S

I mounted the sucker at the same time I changed out some of my gaskets in hopes of getting rid of my oil leak. So I started up the car and still had one gawd-aweful leak so I shut her down. As it turned out, the gasket for the oil pump failed after two years, go figure. After further inspection, something got down inbetween the crank sprocket and the timing belt and punched a hole in my belt and cut up the sprocket. I am DARN lucky my belt didn't break!!!!! Anyway, suffice it to say I am in the middle of changing the belt, oil pump gasket and pan gasket. I will have the car up and running soon. Again, about the intakes, these are the same ones the guys are paying $400 USD for at z31.com.

We also almost have the surface modeling done on the heads to CNC port the heads. This will make for a dealy combo.

pics please!

Here are some pics of the initial machining on a stock Maxima intake:
http://www.sqntech.com/photos/max_intake_1.jpg
http://www.sqntech.com/photos/max_intake_2.jpg
http://www.sqntech.com/photos/max_intake_3.jpg

More:
http://www.sqntech.com/photos/max_intake_4.jpg
http://www.sqntech.com/photos/max_intake_5.jpg
http://www.sqntech.com/photos/max_intake_6.jpg

These are of the 300ZX intake. You can see how we even contoured the openings to mimic a velocity stack profile.
http://www.sqntech.com/photos/max_intake_7.jpg
http://www.sqntech.com/photos/300zx_intake_1.jpg
http://www.sqntech.com/photos/300zx_intake_2.jpg

How much are you going to ask for them, and how much for the head work?

S

can u instal the 300zx aoutmatic ecu in an automatic max. or will ther be any kind of problems. if so what will they be

Kalsc Your running the stock Turbo on your ride right? The T25. Or an upgrade of that turbo?

Or did you opt for something bigger?

i got a question i was thinking of geting a 300zx n/a turbo motor and just get a turbo, manifuld,injectors, and exsost of a 300z turbo blok. cuz i was thinking of geting mor boost out of the n/a blok.
if i do that what kind of riscs en i going to incounter if any?

IIRC, the VG30ET runs a T3, not a T25. T25 is too small (hence why they use two of them on the VG30DETT manuals, and two T22 on the autos). They will work, but they only flow so much at so many PSI.

arsonist: Are you talking about boosting your current car, and putting the 300zx Turbo auto ECU in or just running the 300zx Turbo auto ECU? If you try to run that ECU on an N/A motor, chances are your going to run really rich...which will make you loose power instead.

S

Thanx
I knew that I heard about a t25 in a Z car.
Had a brain fart.

I want something to compensate for the top end of the car. SOHC are for low end take off. The DOHC are for top end preformance. I want something that will balance out the SOHC and lack of power at the top end.
I know Cheap turbos sells some good ones, but I think i might just salvage and rebuild one if the cost is less. Then if all things are working upgrade. Not sure yet.