just thought i'd go ahead and start the thread, so when i have dumb questions or need some troubleshooting advice, i can post it up in here instead of in multiple threads.

If you post a reply, only leave useful inforimation, i don't want to read 10 pages of BS to find the answer to a question.

anyways i took a pic of all my parts i've been collecting, i'm proud to say i'm on the home stretch and hopefully will have everything in sometime in the next few months.

thought i'd let everyone see what i was workin with...

 

Do I see 2 turbos laying there?

 

twin turbos are worthless and suck
























if I can help, let me know... I have some parts all over the garage, and the welder..lol

 

appreciate it bags, i just need a couple more things and you'll probably be hearing from me.


i decided to go ahead and install the 300zx maf, safc, 400cc injectors, turbo timer, and 8:1 fmu (that i'll be getting soon), are there any driveability issues i would have with them being on an n/a car?

 

don't tocuh the SAFC settings yet.. the car will start on days it is above 45 degrees.

On days when it gets cold, it'll start then die. Just feather the throttle for 10 seconds and all is well.

6:1 fmu is what I had and I had to subtract fuel in some areas and add in others.. all below 10% IIRC

 

Neat.

Looks like there are several people embarking on this fun little turbo adventure.

So what are the turbos' specs (planning to use one or both?!?) and your IC's dimensions?

 

turbo size? And why is there two?

 

In case he loses one.

 

Twin Turbo???? Please tell

 

I see two turbos but only one set of flanges....

allen

 

yes, you are seeing 2 turbos,i plan to use both (Sequential), they are t22s off a 300zx, the reason for only one set of flanges is that 3 out of 4 of the flages fit, will probably just have some made.

 

good luck with all that

 

Wow so many new setups for 2006. Its going to e a good year. I'm guessing you'll be the first to do something like this on a max. What kind of power are you expecting and track times?

 

two small turbos arent as good as one, thats why everybody with twins convert to one. these are just for fuel economy, one for low speeds and the other kicks in after the first one. its suppose to be this gas saving set up.

 

ajcool2: well with the vg30dett, you can simply turn up the boost, and get different exaust, and see close to 400 crank hp, so with my setup i'm thinking somewhere right around 350 untuned whp, as for torque i'm not reallys sure at this point, let you know when it all comes together.

C MAX: Don't you think i've read enough of that crap in the many threads related to bashing this subject, if you think it's a waste of time then don't do it, thats exactly the sort of crap i didn't want in this thread


i'll be using my obx manifolds, the usim, and no internal work, one turbo mounted off front bank, and second turbo will be mounted off a pipe run from rear manifold up beneath the battery, that turbo's charge side will run into the intake side of the turbo mounted off of the front bank, then it's charge side will run around the front through the intercooler and then up and into the intake manifold(via PR Cai design)

 

Please dont take this the wrong way, but forget the sequential turbos. I highly doubt you could pull this off, and you CERTAINLY cant do it with the turbos you have there! Sequential turbos requires two DIFFERENTLY sized turbos, youre looking at a parallel turbo setup. I would sell those turbos and buy an a single turbo, save yourself a lot of extra hassle for no reason.

 

HHMM interesting. Well good luck with your project. I cant wait to see how it turns out. I'm pretty sure there were plenty of people that said vq35's in 4th gen would be worthless before it was ever done. Now look everybodys trying to get it. So I say go for it and prove everyone wrong.

 

While you certainly aren't taking the easy road, I will watch if you document the build.

Good luck.

 

Best of luck, even though I personally would run them seperately rather than sequential. The way you're proposing to do it almost seems like you'd be wasting the capabilities of one of the turbos by feeding it into the second turbo. Seems like you could take much better advantage by feeding them individually into the intercooler (maybe using a y-pipe of some sort on the piping going to the intercooler) rather than feeding one through the other.

 

One turbo is all you need. twin turbos require two or everything waste gates,bov, and 2 intercoolers.I am going to use a t3/t4 stage 5 turbo for my 4th gen.
good luck

 

One properly sized turbo. One of the ones he has would be greatly dissapointing.

 

sequential eliminates the need for 2 bov, and 2 fmic, the wastegates are internal so can't really just use one of them, as for the 1 small 1 big tubo for a sequential setup, that may be in the future, i'm going to go ahead with my original plan and things may change in time

i will be documenting most of the project, i see no need to on the basic stuff like injectors, safc, all the crap that already has a write up, but the actual twin part will get plenty of effort.

i'll keep everyone posted

 

cool project, I really only see sequential turbo setups on diesels.

 

I think you mean staged. Staged is when the compressor discharge of one turbo feeds the inlet of the next. This results in the multiplication of pressure ratios for extreme PSI figures.

A sequential simply has all the exhaust feeding one (smaller) turbo in the lower RPMs with a valve that opens once that becomes too restrictive (but after some boost is made) to allow both turbos to get exhaust energy. Both compressors feed a common outlet so there is no PR multiplication going on.

 

Why not just put them in series for 2x tha booooost. 2x the boost = 2x the flow which means 8x the HP. Like bridging amplifiers yo.

 

Staged = Series BTW

Also, those two turbos staged would mearly be an intake restriction. This is due to the first staged turbo being required to supply the total airflow and this requires a larger compressor than the second turbo (this is due to volume and density effects).

You have to have properly sized turbos to work regardless of single, standard twin, sequential twin, or staged/series twins (each requires something different).

 

Muchos Gracias El Capitan obviouso.

 

So exactly what are you trying to acomplish? Ive read your posts 3times and I dont get it. You think your going sequential but you describe staged. Those setups use 2 diffrent size turbos, using two of the same will give very odd and probably dissappointing results.

You need to use those T22's like they were intended, in a paralell setup. You wont have much lag, good resonse and good HP and lots of tourqe. Is that no what your looking for?

~Alex

 

I am an engineer. I like things to be technically correct. I have no sense of humor. I suck.

 

i'll look more into it, it's still kinda up in the air since i haven't done any pipe work yet

 

Well, good luck. Although I would agree with many that this is probably going to be way to much work and probably no better results than a good single turbo set up, it is good to see someone actually trying something instead of just talking about it

-Mike

 

the reason you here it is because its a waist of time. i have several people that i roll with that had twin turbo 300ZX and supras, guess what they're all one single turbo now. before that they couldnt get out of the high thirteens and now they run 11 seconds. and i wouldnt waste my time doing it so dont you worry.

 

twins have been proven to support crazy responsiveness benifical to street cars and circuit/road race cars. look at the Mines GTR it has twins to keep the response.
stock twins = sh!tty
ball bearing twins (gt28r)= great power and response

i just dont see how a high responsive twin max setup would work. Sequential isnt the way to go though

 

Even the Z32's? I didn't know there were that many single turbo Z32's out there. I'm not bashing, just curious. PM me then and explain, please.
I agree, twins can be good for response, but that's not really needed on a Max. The Max is FWD and therefore doesn't make a good track (as in circuit) car anyway, and on the street where do you really need above-average response? Not bashing, just throwing in my .02 about what you said. Very good points, though...

 

thats why i say i dont know how it would wok out on the max

 

I'd like to see someone do an asymetrical turbo system like Saab uses on some of it's V6's. You'd have to run a pretty small turbo but for the 10psi that most VQ owners run it would be fine and would be way easier/cheaper to fabricate. Heck, you could run it off the back bank for the sleeper look.

allen

 

Yeah
That would be a good idea, but I think in his case it would be much better just to use the whole engine. It would save you some trouble, but I think in the end the tiny bit extra work would be worth the results. Of course, we all think he should just do a big single, but obviously that isn't happening

I don't think there's any reasoning with him

 

I have one friend with a 300zx twin turbo who converted to a single turbo, and i have 2 friends who converted their twin turbo supras to single. all from the same performance shop. i use to aw at the fact of having twin turbos but the guys said its not good for what they want to accomplish. they are originally made for performance and fuel saving. they have ways to make a good twin set up but not worth it especially for our cars. the amount of money you will have to spend to compete with a single turbo would be outrageous.

 

z32's are not as easy to swap from a single turbo from twin. The fact that they have a v6 motor and limited space makes it hard to plumb the piping to run a single turbo. I would say that 98% of them are still using a twin setup.

 

Which is exactly why I was curious about his friends' Z32s. There are only a handful of single turbo ones that I know of. They typically use larger twins to keep things simple. They are one of the only factory TT cars where keeping it TT is easier