370z Remote mount twin turbo - Mismatched turbos!?!?!

We had this silly idea to use one big turbo and one small turbo for the remote mount 370z to get back some spool and keep our top end power. The results were crazy!! We're also preparing Jari's RSX for his turbo setup.

[@itsJoshW]

Better way to explain wastegate: You want your turbo to hit a specific pressure (PSI). Once it reaches this specific amount (bar, pound), the exhaust gases then are forced to exit by regulating the amount of 'excess' pressure out of the wastegate. A boost controller allows you to do this electronically so you can adjust it not only by the legitimate pressure spring, but by an electronic valve.

[@bsturn]

One of my favorite auto channels on youtube. My two favorite automakers in one shop doing badass things, keep it up!

[@GearheadsAutofab]

Nisda !! For the win!

[@remisavard658]

How about big turbo and reduce the exhaust system diameter in order to increase the velocity so your spool time will reduce?

[@VS666]

glad to see the channel is growing. i love watching these new channels from the beginning. i wish i had a sweet little shop like that near seattle. everyone around here is so busy it feels like you're bothering them when you come in and say hello

[@showmepotatosalad5327]

Varg Sutton I love that I found his shop and can take my car there

[@EvilDrifter13]

Make it quad turbo and have the small turbos spool the big turbos 🤔

[@AdJacMusic]

Smalleer one would restrict the larger one at higher rpm

[@EvilDrifter13]

typhoonfire8 he would need 6 turbos 😂

[@EvilDrifter13]

typhoonfire8 you know how complex it would be to run 6 turbos 😂

[@NatoriousGamePlay]

Idk what the budget you want to spend on this is, but a quick spool valve and bigger twin scroll turbos would probably be the best option. And a wrapped exhaust to keep some heat in.

[@jamescundy]

Been waiting all week for this video, really enjoying the Z build! Great idea using 2 different turbo sizes. Next best thing to sequential setup. Don't know what turbine inlet flange size or downpipe diameter you're using, but I'd adjust the down pipe size so it's cross section area matches the turbine inlet flange cross section area for best spool. Regarding MAF sensor, you can increase the MAF intake tube diameter and scale the MAF sensor accordingly. Log it for 5 minutes at idle, then change out the MAF sensor and log again for 5 minutes. That'll give you the correct scaling to use. Only potential issue is that idle may become a little less stable. Keep up the good work!

[@littlehead66]

Great content. Anyway i can get in touch with you to get more information on this build. Thanks man keep up the positive videos.

[@bighomieJ5X]

I love the positivity your channel puts out ..keep it up...

[@GearheadsAutofab]

Thanks dude!! I’ll try !

[@Resqueda01]

Love this Chanel. I have both the 370z and an RSX. So this is perfect! Can’t wait till the next video

[@robertwilsoniii2048]

You know, back in the 90's Japanese auto manufacturers did a sequential twin turbo to combat this exact problem whilst keeping things simple and straightforward. Not really that different from using two different turbo sizes. That was a really cool and creative idea. I like this style of car tuning; it's very artful.

[@ADVRally]

How did you make the fuel return system @ the fuel pump? Did you remove or block off the internal regulator?

[@conradladouceur7557]

Loving the videos on the twin rear mount turbo set up. Would love to do something like this to my Outback 3.0r

[@cristhianreyes7481]

Perfect way to explain it brother.

[@Tunercraze]

4:30am and I'm watching this before going to work? Yup!! I'm keeping up with this VERY closely! Please don't forget the VQ35DE G35/350Z crowd. Keep up the good work! It looks like we're finally on the home stretch with this kit🙂

[@GearheadsAutofab]

Ya we are finally seeing progress and the numbers are getting closer to our original goal !

[@andivatar6383]

the pipe is crossed right? so the back pressures on the driver side and the passenger side are the same? anyway, this idea reminds me about polyquad valve.

[@fernandohood5542]

What is the size of the pipe which holds the air flow meter?

[@angelocilli3190]

Would large single turbo be good?

[@timothybayliss6680]

I remember, so no source, that 2.3l mustang guys with auto trans had a t3 0.48 exhaust housing too. They are apparently really inefficient as boost goes up and would only put out 12psi at peak with the Wastegate line pulled. The drive pressure gets out of hand too. I really want to know what pump you guys used for the oil because I want to put an HX35w under my 3.0l Audi a4.

[@kdayrit11]

Great content, I'm glad you tried the mismatched turbos on a rear mounted kit. Talk about thinking outside the box.

[@GearheadsAutofab]

Dude seriously lol .....but I’m so happy with the results .....

[@johnpowers4076]

@@GearheadsAutofab 😮 My face when you revealed one small and one big turbo lol. Awesome idea. Reminds me of back in the day when I dreamed of doing a compound setup on my SC300.

[@duomaxwell5807]

I would love to turbo my G37 S coupe. ..your videos got me debating whether to do a conventional setup or rear mounted..decisions decisions

[@yung-qn9nt]

Nice! Keep the vids coming!👍🏽

[@johnsumner2987]

@9:12 you can see it in his face that those mounts work hella good.

[@joshm6251]

Fun videos! I’m contemplating a bigger single turbo, but trying to gauge if I’ll see enough of a gain to really justify doing it.

[@B7_S4_Turbo]

Well consider it this way... With proper sizing. 7psi =+50% hp.... Is that worth it to you?

[@TheMick26]

Well, how about that... sometimes the craziest ideas end up being the best. That's pretty innovative thinking, Jarom.🤔👌 Waiting for the mass air flow sensors to arrive and see what this thing can really do. Great work, brother!

[@GearheadsAutofab]

TheMick26 dude.......we totally pulled off some shananagains and extended the factory sensors...........😁 saved 700$ on new ones ......show it in the next vid........I’m going to solve all the Nissan problems ......one at a time. 😂😂👌

[@newlinedetails]

Man I'm so glad to see your subscription count go up. Keep doing what you're doing and you won't need customers just make videos all day!

[@GearheadsAutofab]

Baaa haaaa but I need to keep fixing people’s problems to keep my skills sharp lol 😂😂👌

[@CornellW003]

You can make the pipes larger for the maf's and scale them for the larger pipe. I've also heard of using the r35 maf's.

[@Turbogto_guy]

CornellW003 he wouldn’t really have to rescale anything. Larger pipe slows airspeed down so the frequency will go down and give more resolution Just retune the fueling for the frequency.

[@CornellW003]

@@Turbogto_guy that might work too. I'm still learning the uprev stuff. I've ditched mafs years ago with my sr20 but I'm getting into the g/z game now so I'm learning too.

[@Turbogto_guy]

CornellW003 yea I’m running s speed density tune on my turbo car

[@RagingBullNuts]

Kfx Guy he's still right. Scaling the pipes will allow the current mafs to be used.

[@Turbogto_guy]

Eddie Castaner I think that’s pretty much what I said. When you scale the injector flow and engine size it makes the ecm think the engine is smaller. So less frequency is used in the maf

[@ranmarsh8271]

Tell your man with rsx to go turbo as well, love the rsx content and rear twin setup as well.

[@GearheadsAutofab]

He’s getting ready soon I sent him a final parts list today ......I don’t think he’s ready for double the power lol 😳🚗💨

[@Mattmazz77]

Love the Hoonigan reference watch them all the time they're awesome....lol. that's crazy that combo worked, I wonder how long it will go b4 or if it will break....lol.

[@AmirPomen]

i remember u were using blow-through style on MAF sensor right? just switch to bigger tube and rescale it in ecu.. should be close enough... and as for 1 small + 1 big turbo... i think u can gain a better balance if u add a crossover pipe just before the turbine inlet

[@kuckian]

please include the dyno pulls in the video

[@gamesandcoffee3424]

1st off that boot line on the Z gives me some ideas on installing Overglow. 2nd hood latch or front spoiler....

[@justinparker7605]

Loving it

[@lisarende1658]

Will you twin charged the 370 z

[@stelter99]

What engine management do you have? Or did you show that in a different video??

[@jahbetts6682]

David S I believe it’s uprev

[@BigHeadClan]

Well this has been an interesting build if nothing else, I'm haven't been sold on the idea since the first video and the current numbers put it slightly above the Z1 400HP Kit (which is waay cheaper than going FI) but it looks like you guys still have some head-room left. It also looks like the drive-ability hasn't been compromised going rear-mounted turbo which is nice.

[@GearheadsAutofab]

I’m not totally sold yet either but I will put out a video with all the things we learning in 3 months of trying 6 different turbos and 2 different exhausts and 2 different oil systems and 4 different fuel setups......and so manny long nights on the dyno lol. People can just have this info so they can decide for them selves. Soon as I get a min I’ll film it.

[@BigHeadClan]

@@GearheadsAutofab Aye as the old saying goes nothing ventured nothing gained.

[@youngmantiburon]

What size AR did you have for 57 hot side?

[@GearheadsAutofab]

One is 57 trim with .63 ar exhaust the other is 50 trim with .48 ar

[@youngmantiburon]

Gearheads Autofab I am asking cause I have the 57/57 with the AR.48 hotside. housing. I plan to tryout myself. I am experimenting for my first time so if yall do anymore changes I will be looking out for yalls you tube videos.

[@socaladventuresdavidt2557]

I was going to say put a small turbo and a big turbo. Sorta like a sequential turbo. 1 to build boost n the big turbo for once has boost.

[@yolofullsend]

Hmm def interested in seeing how the mismatch works out.. my rear mounts are too big 😁

[@zmanmd1641]

Porsche did the large and small turbo on the 911 Turbo back in the 90's to solve a similar issue with lag and top end power.

[@AKSSB_Hustle]

I have a 04 g35 coupe. 5/16 plenum. Megan down pipe. Single exit exhaust and an AEM intake no tune never got a code 121k mile

[@GuyX2013]

Try to wrap the exhaust and blanket the turbos to give us an absolute best case scenario of what kind of spool times to expect . Maybe you'll achieve even more power sooner. So far so good and also how much boost are you running?

[@GearheadsAutofab]

About 7.5 is the highest we saw on the wastegate before the controller, shortly after that we maxed the maf

[@justanothermorty]

Those small turbos had to move a ton of air through a ton of piping and then create pressure in all that. So It make alot of sense why the fell of like that that's alot of volume to fill.

[@B7_S4_Turbo]

Volume of boost piping is not enough to make a difference.

[@awdrifter3394]

Wow, that's an intersting way of doing twins. Did you have some way to equalize the back pressure of the cylinder banks?

[@jonnyhoath515]

They flow into a single intercooler then the 2 intakes feed off the cooler

[@awdrifter3394]

Then in that case he should use a even smaller turbo, since the pressure will get equalized a smaller turbo will give him even earlier boost. Or have the smaller turbo's wastegate dump back to the big turbo's side. They should also wrap the exhaust pipes, some rear mount turbo guys seems to do that to try to retain more heat in the exhaust.

[@jonnyhoath515]

2 very good points there! Love the idea of the small turbo Wastegate entering the big turbo exhaust

[@awdrifter3394]

Yea, let's see what he'll come up with in the next video. His series is interesting, more interesting than those who just installs a kit.

[@showmepotatosalad5327]

Such a good teacher. 👨‍🔧👨‍🏫

[@vegaperformance4102]

I was just thinking of this

[@robertwilsoniii2048]

This is really nice content.

[@Easydaymedic11]

Maybe a rear mounted compound turbo setup would work nice

[@charlieg1341]

So how much did u end up spending on the build can you put out a list of parts

[@GearheadsAutofab]

About 3-3500$ I don’t have that list anymore, but I’m building a new kit now ......vids coming in the next few weeks.

[@hundizzar]

That RSX is a straight JUNKER

[@josegarza3203]

Are you selling this kit?😊

[@Xboyxofficial]

Those stickers just added 20 more horsepower to the rsx

[@johnpowers4076]

Yeeeessss the next video!

[@R0yL33]

how 'bout dual exhaust wrapped together with an exhaust valve on one pipe that opens after say 4000rpm and a single twin scroll turbo ?

[@GearheadsAutofab]

Your so close the conclusion I came to for my next rear mount twin setup ......the solution is even easier that that .........😎🤘

[@GearheadsAutofab]

Buying parts already it’s coming on the channel next month....turbos will be here on the 3rd

[@Crusher103]

lol 346whp. I am now enjoying this channel.

[@norbertobatiz958]

I have Accord 97 f20b blue top 2.0l you can make it turbo?

[@GearheadsAutofab]

Those are very easy to turbo !!

[@norbertobatiz958]

@@GearheadsAutofab how many days you need and price, ?

[@manuelorozco9494]

Have you thought about adding a compound turbo setup to the Z.

[@KJB19821]

I want to try this on my 3.6 cadillac cts4

[@GearheadsAutofab]

It would work good for that application,

[@1johnnyjones]

I am building a 350z now and I am waiting on your parts list will you please post it

[@TBR972]

i apprciate your channel bro , can you give me the name of the music at 6:00

[@TheeHomelessRunner]

Let your phone listen from google and it might find it or download a music finder app if you have iPhone, hope this helps.

[@Turbogto_guy]

I think one turbo would have worked better.

[@GearheadsAutofab]

Totally agree!

[@vanislandrider7982]

not twin turbo, is now Bi-Turbo, I like it!

[@fernandohood5542]

bigger inlet pipe reduces airflow

[@B7_S4_Turbo]

No

[@kelvindeleon2828]

De leon stilo. Sigeme. Preace

[@socaladventuresdavidt2557]

ORRR JUST GET A sequential turbo like on veloster N!

[@BBnissanZ]

Where are you out of I need someone to build turbos with meeeee

[@LordTheodore04]

Hi

[@GearheadsAutofab]

Hi ✋

[@dayadam16]

Bro who the hell's head tore that rsx back seat up lol.

[@codypaniwozik6056]

I’m confused on why it took so long to figure out what group B rally teams figured out in the late 80s early 90s. They were more so using sequential turbos but the principle remains the same small turbo low end big turbo high end

[@yoitzmickie2330]

Yo been waiting lol 1st view

[@elmoz122]

Oem mass air flow sensors do not max out at 340whp lmao. I make that power with basic bolt on’s on my 370. Stop passing on bad information.

[@stevenrodriguez3982]

elmo z there are a lot of factors to consider when dealing with MAFs and no 2 setups are the same. Pipe diameter is huge, air density is a factor, and pressure is a factor. On our setup this is what we max out sensor voltage at. It's not bad information it's our information specific to this build. We could get MAF headroom by increaseing pipe diameter or adding resistance to the MAF signal wire. This is why people who go forced induction typically go speed density instead and tune off of volumetric efficiency.

[@Turbogto_guy]

Sorry but that hood latch shit is so ricey. Smh

[@MarcTavX]

LOOSE THE MUSIC MAN CMON AND GET TO THE POINT.. GAYYY