https://www.youtube.com/watch?v=0KLcxL5wYRA

 

I've been reading this thread for about 1hr and all do respect .. Turbo 7 gen ? That's cool but how about the CVT trans ? Will it handle it ? If it does how about the shifting ? .. Stock engine makes the trans cry for mercy I can't imagine a turbo engine

 

CVT has been great except for those hiccups with the tune where it was overboosting and confusing it; that'd happen with an automatic too though. It's a little weird in D mode cause D likes to shift around, so sometimes you feel the pressure let off and the BOV pop. In "manual" mode though it drives like a manual and its hella fun.

For the people who aren't in the FB group and don't know the history of this build, yes I'm fully aware dropping this money into another car can create a faster car. It's been done though, this hasn't.

 

You went this far .. Try to mount a manual trans .. I met a guy that has a 7 gen with a manual .. His father owns a speed shop in Jersey .. He mentioned they mounted a 6 gen harness and computer to it ... He was in the process making a center consol where the stick is .. The only thing he had done to the engine just an intake and thru a Borla exhuast system .. He said it wasn't easy getting the manual trans working together but at the end it paid off .. He said its a totally different animal with the manual ..

 

doing a trans swap is a completely different undertaking. way more money and time. my friend looked into it, to do it right you'd need a 370z ECU and a bunch of other ****, he disconnected the CVT and it threw so many codes it was ludicrous. I'll let someone else pave that path, im pretty much done spending money on this car after this project.

 

It is a pretty car , I'm sure between the car and the mods you could have bought a GTR ... Letting alone the time you put in .. My friend @ work had a 7 gen sold it and bought an EVO ... Dropped a bigger turbo injectors exhaust computer mod .. The car puts out 600hp on the dyno .. 4 cylinder all wheel drive the car is sick .. The puts you back in the seat when shifting .. If I knew what I know now I would have went that route .. At the same time I still love my Max ..

 

you talking about Wally? yeah seemed like he got frustrated with the power limitations. my boys GTR puts out 600 whp and 580 torque so trust me i know what im missing out on. my next project car will be something much more powerful for sure, this will just be my boosted dd to mess with people. cause seriously, who on the road would ever think its boosted?

 

Thats 600 hp stock .. Just to do a upgrade on the exhaust it will run you 5k .. Reprograming the computer and some other mods your talking 800 to 900 hp .. There's a couple guys around here that have done that .. Rich kids

 

Lol theres an alpha9 running around here. Hes got multiple go pros mounted the one time i saw him and he was being followed by NHP. Funny stuff.

But all in all Ghozt its appreciated the pioneering of the max youve done. When i took the front bumper off the max kind of looks like an evo.

 

Went ahead and heat wrapped all the exposed turbo piping in the bay, and organized my insulation on the intake pipe a little better. New throttle body arrives tomorrow, fingers crossed I don't murder the throttle position sensor on this one too.

 

Just got off with my Uprev protuner, been talking with them about the build and some things related. One of the issues I was randomly experiencing was sometimes we'd plug in with the Uprev Cypher cable and it'd say the car was on stock ECU. Try a few more times and eventually it would say Uprev tuned ECU. We thought something was up with the ECU or wiring, but an Uprev protuner confirmed it's a bug in their software for certain models of car. So if anyone else runs into that issue, just keep trying.

Replacement throttle body arrives today. Also going to put in a temp monitor system with 4 gauges in different spots to see how we're doing on heat. If heat is looking good, back to tuning we go.

 

I wish you well. Thanks for the update.

 

Great build and thread. I'm new here and asked about a supercharger or turbo kit for my 2014 and was told to go find Ghozt. I see after reading through this it's not an easy thing being there is no simple kit to buy like past autos I've had. I thank you for the experiment and work and hope something more simple and available comes out for the 7th gen in a few years. I will probably stick with basic performance mods and stick current money into body and sound, maybe suspension and tires/wheels.

These people and the CTV opinions are hilarious, even the engineers who built and designed it don't know it's limitations. I've beat the crap out of my 2014 with the smart button turned off and the stock 290 horse is ok but the tranny could easily take more. If you ever come out with a complete kit after testing and everything goes good let me know. I can spend about 6k max for performance so hopefully I'm not too far off in the cash wasting arena.

I think some people are forgetting this is a sedan. So far you are the only one showing what can be done, the rest are stories. I hope it goes well and you can give some info on how to do this as I want to keep my 2014 and the only way I'll be doing that is if I can get 350 horse or so out of her. I would definitely never go with a 4 banger so most other models are out being that stupid 2.0 is so popular again. I had a Talon AWD turbocharged to the max and those 2.0s didn't last a few summers of hard driving. V8s are out due to gas and car size, and a GTR is 100k, maybe someone should tell 187max this. I figured a 6 from Nisaan would be a great engine to build some power with so keep up the good work.

 

I'm aware a GTR cost 100k .. The money spent between the car , turbo kit , suspension and all the other stuff that are not listed including labor and time spent .. Just do the numbers .. He tried and still is trying to make it work .. I know it's a sedan but a sporty one ... You wanna go fast buy an EVO 4 cylinder turbo .. 500 to 600 hp with mods for half the price .. Just to let you know a co worker has an EVO and does over 500 hp , the funny thing about himhaving an EVO I get to watch him blow away a GTR , leaves the GTR eating dust .. Remember he didn't spend a 100k

 

187max - I appreciate what you bring to the discussion but you're completely ignoring what Ghozt said: he's doing it to prove it can be done. He's not trying to save money or smoke a GTR. It's a nut he's trying to crack and I'm looking forward to him being the first. Hell, he may end up being the only. You don't have to agree with what he's doing and that's your prerogative. But it's also his to do with his car as he pleases. No need to judge or give him crap for it.

 

ive been toying with the idea of a supercharger. any input?

 

I'm hoping that sometime in the near future, they will come out with some cheap and easy way of installing electric hub motors like the ones that Protean electric are developing. That way, you could just replace the rear wheels with these hub motors and get AWD and instant torque/power and completely bypass the CVT transmission. Probably not going to happen but that would be the ideal setup for this car due to the CVT.

 

Nowhere near 100k. maybe 50k. It's a first time thing so saying buying a 100k car is more logical even if true which it is not isn't the point.
I'd care more about the evo if it was yours, secondhand stories don't mean much. If you are going evo get one now because they are retired in 2015 going full hydrid/electric and away from performance. Not the prettiest car either and again, the horrible 2.0 which can only sustain major modding for short periods meaning your friend will be in the shop more than the street. Who the hell wants 500-600 hp four door anyway? If it could be achieved at a good price sure, and to a good looking auto hell yes, but an evo? Weren't these the dirt track racers that made them popular? Anyway, I want a nice looking sedan with some power, nothing more. I just replied to you because I found it childish you were responding to Ghozt the way you did. Unless the war stories are your own keep em to yourself.

 

I haven't read the whole thread so this may have been answered...

How do you determine how/ when the turbo builds boost on one singular gear? Is it always on boost?

 

How are you privy to this information?

The M5, AMG E Class, CTS-V, RS4, 6, 8, and Hellcat Charger are all sedans as well, what's your point?

 

I respect was he has done and what he is still trying to do .. In reality you can have all HP in the world for the 7th gen but the transmission problem still remains ... @ 290 hp from stock this car should be kicking butt ... The only thing holding down 7th gen is the trans .. And by the way I'm not putting down Gothz ... Let's not get things twisted

 

He already knows that. Anyone who has driven the 7th gen and looked for ways to get more power knows that the CVT is the hurdle to get over. And when Ghozt and his team figure it out, hopefully you'll be there to congratulate him along with the rest of us.

 

hopefully he does figure it out .. He still has my respect even if he doesn't ..

 

I guess that's what forums are all about but he is turbocharging a car, not curing cancer. Let's not get so testy about this on either side of the fence. Would it be cool, is it an additional challenge because of the tranny, does it require perseverance and some new thinking, does it cost more than a higher end faster car... Answers to all- YES, but let's not get carried away. Good luck and hope it works out.

 

So, in D mode its a little weird but basically boosting the whole time. As you drive and hold the throttle the CVT will do random gear shifts so you'll hear the BOV make noise and then start building pressure again quickly but in general it stays under boost until you let off the throttle. It definitely moves, but that kind of scares me that it never lets off boost. I like to drive it more in Ds/Manual mode right now, in actual Manual mode it drives very similar to how a boosted manual would in terms of when you are boosting and when it lets off ("shifts").

So, we've backtracked back to basically a stock setup: shortram intake, stock tune, stock injectors, diff throttle body, diff accelerator pedal, and still seeing random losses of throttle. I'm taking this over to a buddy of mine who specializes in automotive electrical stuff to see if they can figure it out. Remaining potential culprit unfortunately is the engine bay harness wiring, which is going to be fun to troubleshoot.

 

Is fuel pressure good? Might be something to look into as well.

 

theres like 20 some sensor related to the throttle, vehicle speed, and transmission that we need to check out first, but that is on the list near the end. im frankly amazed at how complicated these drive by wire systems are, never really gotten into it like this before

 

I know this may not be cost effective or even an option to you but wouldn't it be better to have the transmission from the 6th Gen Max than to have to deal with all the crap from the CVT?

Maybe even the 5 spd tranny from the Altima 3.5 V6 would work better with the turbo than with the crappy CVT.

I'm really hoping Nissan cans this CVT and go with an 8 or 9 spd auto or some type of dual clutch set up.

 

the issues im dealing with are related to the drive-by-wire system in the car, not the CVT. and no, swapping transmissions is not gonna happen - this project has already taken way more time and money than I ever intended on spending.

 

Whaaaat the heck do we need 8 or 9 gears for?

 

4 on the floor!
Good luck finding your gremlin Ghozt.

 

http://www.popularmechanics.com/cars...speed-15855273

 

"Any criticisms of the 8HP have to do with the individual tunings a carmaker applies rather than with the unit itself. "

Sounds like the same problem that's being talked about here. I wasn't questioning why there are 8 or 9 geared transmissions as obviously it betters the gas efficiency. Rather, how that transmission would help the current problem of adding the turbo to the max?

 

It can handle more power and torque.

 

Just took it by a Nissan and they wouldn't do anything other than plug their computer into it (they didn't seem like they wanted to touch it) and I watched them have difficulty pulling info from the ECU. Took 5 tries before it pulled anything, and they said it looks like an electrical/wiring issue since they couldn't get to the ECU reliably. My buddy, the owner of Absolute Electronix here in MD, is going to take the car from me now to see if they can isolate the problem. He's convinced a wire got messed up somewhere, we just need to find it. All things pointing to a wiring issue, which would definitely explain a whole host of problems.

To be continued...

 

Hope you find the issue soon. I know this must be very frustrating.

 

Thanks for the support guys. Yeah, it's not as fun as it looks. And if it doesn't look fun, then it's exactly how it looks.

 

I could only imagine the headache you're dealing with. Cars are so complicated nowadays, all in the name of "efficiency." Throttle pedal position sensors, throttle position sensor, ETC, ECM, etc.

I wonder if it's possible the ECM/ECU is going bad?

Hope you guys find that bad wire (and that's the only problem). It'll be nice to see your car finally doing some serious boost tests.

 

Yeah that is possible, if we find nothing wrong with any of the wiring I might try replacing the ECU anyway they're not expensive used. We've definitely had a lot of weird electrical problems. Not being able to read info from the ECU I thought was odd.

 

It really is odd, especially if Nissan's system couldn't connect to it initially. Luckily they're less that $200 on ebay. http://www.ebay.com/itm/2010-Nissan-...8b2f37&vxp=mtr

I don't know if you guys have looked at it, but maybe the Juke can give you guys some ideas regarding how their turbo is wired and how turbo acts on a CVT. Supposedly, the CVT models for the Nismo Juke RS has our Maxima CVTs in them, so that might be something to try out if there's one near you.

http://www.nicoclub.com/FSM/Juke/2014%20Juke/

I'm no expert on these things but I'll try and brainstorm other avenues to check. Hopefully your electrical guy can figure it all out!