diy rear mount twin turbo 370z
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- Опубліковано 7 лют 2025
- we set out to try a les conventional way to turbo the 370z in hopes to reduce heat and fitment problems, and hopefully do it on a super low budget and see how we like it compared to the regular ways.
I have a single rear turbo setup on a LS and really like it. The spool time isn't as crisp as a properly sized turbo sitting close to the engine, but the lag is NOTHING like what most people are thinking in the comments. This setup will spool better than someone that slapped a poorly sized turbo into the engine bay.
A couple of points that may be useful. 1. Wrap or coat all of the exhaust to keep the heat in. Turbo blankets help too. 2. Run a 1-2 PSI pressure one-way check valve on the oil feed line and on the oil drain line to the pump. This will keep the oil from draining into the turbos when they don't want/need oil. 3. Re-think your wastegate angle. It should be Y off the exhaust and right now it is a T. They likely aren't going to do their job positioned like that.
This comment is obviously probably too late, but I thought I would share a couple of things if you are still working on it.
+1 to all of these points
Yeah I saw the t thing aswell and thought not ideal but having 2 and being a decent size while not being ideally positioned will probably still suffice. I'd say in high gears on long hauls it will still suffer a little bit of over boost but round town should be ok.
lol I agree with everything you have said, HOWEVER you should see the awsome numbers this car made in later vids. 339whp on 4lbs, spool at 6000rpm. There are NA bolt-on 370Z making that number with more torque. I am looking over this build to see what exactly the goal is but this is getting hilariously bad, especially for all the equipment at their disposal.
He's had it on the dyno multiple times ..I'm pretty sure if there was going to be boost cream he would have seen it on the dyno,I belive it effects more so with the turbo closer to the heads .been it's a rear mount the dual exhaust helps elevate the boost creap.
I run a rear mount too and I have never had leak back from oil flowing back and I don't run check valves..values.. scavenge pump being gears pretty much acts like a check valve,also the turbo looks lower then it is..his is higher then mine and mine is pretty much level with the pan..and his work is so sexy..it looks bad ass..I wish I could weld like that lol..
I have a G35 Coupe (a 350Z in a tuxedo lol) and believe me when I say that I will be watching this custom twin turbo kit like a HAWK!!!!!! Especially if this is budget friendly! Your kit is already looking like it will be a heck of a lot easier to install than the casual engine bay set ups. PLEASE keep it up as I am interested in being a potential buyer on this.
Tunercraze same 🤙🏽
I'm making a twin turbo setup for my 350Z right now (got loads of videos of the progress so far if you're interested) and I can confirm it is indeed a nightmare to fit turbos anywhere in the front lol I've ended up cutting out plenty of stuff and even after that its still going to be super tight
@@ChrisDrift is a ls swap better in terms of size problems?
This has to be the most interesting way to setup your turbos, I enjoy seeing something different. Keep it up man, really enjoying this.
everyone saying LAG LAG LAG... but if you actually do some research it turns out it really won't be that bad at all. One of my friends who's got a degree in automotive engineering and worked with the Mercedes F1 team did some calculations for my car specifically (twin GT2554R on a 350Z) and it turned out that an extra metre of intake tubing would only add something like an extra 0.2 seconds of spool up time. He also found the air would be travelling through those pipes at over 130 mph when at full boost. There's even an MR2 that had engine in the middle, intercooler up front, and turbo in rear (i.e. the worst combination for intake air travel distance) and it still won a load of Japanese GT races a few years ago going against other more "normal" cars
It's not just velocity of air but also temp. The exhaust cools as it travels away from the engine. As it cools it shrinks and loses ability to spool the turbo.
Good stuff. I have a rear mount 4.2 Audi. One additional comment to the ones mentioned below me, taper your exhaust piping as it runs down the car. Helps keep velocity and energy up.
B7_S4_Turbo what year?
Looks cool man. I’d switch the turbos; make the intake on the insides to help keep road debris out of the turbo intakes. Plus you have less bends on the mufflers with the exhaust being on the outsides.
Your gonna floor it and it’s gonna spool the next day
Robles Inline 6 generic comment for rear turbos but that's not the case from what "UA-cam" has shown.
puck you whitey lol turbos are small and with the piping size on hot side they should spoil pretty quick. We'll see the dyno.
Actually rear mount turbos are very efficient, STS is a company who has proven this.
puck you whitey ,have you seen a dyno chart from a vehicle with a rear mount turbo?
puck you whitey every1 has there own preference, in this situation i get what he doing..
People talk a lot of flac on rear mounted turbos because they claim it will have insane lag, and I would agree with you if you used crappy pipe bends and oversized piping. Rear mounted turbos are a work of art and when done right they are actually way more efficient than traditionally mounted turbos. I have 5 cars with rear mounted turbos and the lag is within tolerance, only reason i went rear mounted is so I could keep the ac system and use bigger turbos. Use smaller tubing and wrap the pipe from front to back to keep the temp from dropping and route your intake pipe to the front where you can protect the intake filter from water to prevent hydro locking and if you can weld a turbo shield to prevent water from splashing on the turbo. Again its a work of art and mad props to this man for making a beautiful twin setup.
I’ve been wanting to do rear mount turbos on my 370z forever but I just couldn’t find enough research on them... Can’t wait to see how it turns out!!
I've watched heaps of rear mount videos, and they all seem to turn out well. As long as you have the right pump to send the oil back
Rear mounted mine for 2300 using all name brand stuff in 3 days has 0 lag and makes 603 with meth injection don't let people that don't know a fuckin thing talk shit
Instagram is tree_fittyguy
Dope! I can’t wait to get it on the dyno!
@@GearheadsAutofab mines single turbo spools at 2500 hit target by 3300 carries throughout bein rear twins yours probably won't spool til 4k I thought about twins but cost wise its double I was able to use name brand stuff and still keep it cheap goin single
I agree on the single turbo, I have told customers for years not to go with twins lol......I just did it for fun and the balanced look. If it was my own car I would just put a 62/66 on it and call it a day lol. I need to check out your insta
@@GearheadsAutofab lol you can't see any of it anyway when its on the ground the scavenge pump is all that's visible and they have suction so it can be mounted wherever
Just started this same style setup on my 88 Corvette! I've done a lot of research and I'm confident that it's going to work great. There was a company building systems for Vettes but they sold out, bought back, retooled, ect. Priced ridiculously now. Do it myself!!! 😁
This setup offers an interesting side effect. With the distance the boosted air has to go to reach the intake, you could bypass the intercooler. The air should cool in the pipe. I might go with a smaller diameter exhaust to push more gases faster to the turbos to reduce turbo lag.
A smaller pipe would reduce the flow rate. It's not helping pressure.
More flow is more pressure. Less flow is less pressure, in a given space.
Kind of like trying to blow through a small straw when compared to a larger one.
The balloon will fill up faster when using a larger straw. A propeller will spin faster when you blow your air through a larger straw. Best way I can explain it.
Yep tested this a bit , another note is, there was almost no difference in spool time between a 2 inch pipe and a 3 inch pipe…….
Holy shit... Who would have thunk?
Just subscribed and I like your content. Nice welding and I love the budget conscious approach to your builds. I actually feel like I can build a turbo kit for my mustang without spending north of 8k!
Do it !!!!!
A single turbo would have much less complicated, and cheaper.
tropmonky but not as cool
@@cjl3779 Touché
I like rear mount because it installs without removing the engine. No exhaust manifolds to deal with in cramped spaces. Easy to maintenance and when working in the engine bay, this style turbo system is almost none existent.
Strongly suggest flex joints connections to the turbo's and if the turbo takes 10 years to spool then maybe you need a narrower exhaust of try mounting the turbos closer to the engine. Maybe check out The Skid Factory, Your might get some great ideas from the TURBO YODA.
Al said and done big up to you for the attempt especially from an engineering stand point.
You might also need to look into adding pumps for the oil and water feeds as gravity is not going to be your friend with that setup. As you launch the oil will be thrown backwards so returning the oil to the engine is going to be a challenge for you.
Good luck again and I can't wait to see the next episode.
There is a reason why they place turbos as close to the exhaust ports as possible. You should just supercharge it if you are gonna waste all that thermal energy and throttle response
Throttle response is unaffected.
True story. Thermal energy is what spools the turbo not the actual exhaust gas
been thinking about a rear mount for my 370z or go super charged. This might sway me to the turbos after all. Great work so far my dudes!
Totally forgot rear mounted turbo's were a thing good space saver
Add a tow bar and a trailer and you can have as many and as big turbos as you like, Exhaust flexis will take into account cornering problems at the pivoting point and zip ties will take care of all the pipework..
I was wanting to Turbo my 2rzfe Toyota Tacoma. The only reason I'm making this comment is because I was going to put my Turbo underneath the bed behind my cab. This kind of reminds me of the idea I had
Subscribed! Curious to see how this will play out much love from Texas!
Most creative turbo build i’ve seen in a while! Can’t wait for the finished product
Hope you guys do another rear mount turbo 370z build the series offers alot of information on how to do it right through trial and error but the finished product is never clearly shown.
Bro. The turbos need to Hang from the chasis because the flex from the engine mounts will break all your welding work Besides the shaking will rattle that Z to Kingdom come..
This is true. Thats why Nissan builds in 2 big flex pipes in the mid section to prevent the exhaust from breaking. And in a older video we installed solid motor mounts so the engine will not move like a stock setup. But ya your right you totally need lots of flex on exhaust setups. I fix broken systems every week on cars with inadequate flex.
I have just about 50000 miles on my rear mount.my turbo us solid mounted via a steel plate and never has it come loose or crack..as long as you use flex joints there is 0 problems with cracking or breaking..my biggest advice I allways give people before starting a new project is simply this..build it completely on paper and realy thing about worst case scenarios to challenge it..once you think about the problems and the fixes it's time to start building..think think think is the best advice ..
This is intriguing...subscribed.
Sweet. Would be cool to have its own oil and coolant tank with electric pumps setup with coolers to recirc and cool those puppies. With a quick release oil dump for quick and mostly messless changes. Thats what i would do. Keep turbo and engine oil seperate. Turbo maintenance outback... I would def have a open circuit light that shows electric
Pump failure just in case. Simple.
Good video. Nice work. Constructive criticism: Music too loud, voice too low. Cheers.
What size turbos?
Wow fast progress on the turbo kit. Super interested in seeing how the oil return is done in a rear mount setup. Didn't expect sooo much room for the turbos, good thing the stock exhaust is so huge!
Edit: thanks for the Christmas upload btw the perfect gift 🎁🎁🎁
This should be interesting i was think about twin turbos but was not interested in stuffing in the engine bay best of luck with your build.
By the time the exhaust passes the catalytic converter it gets cooler.
"stronger with Tig".. Whatever makes you feel better at night. Mig can get the same penetration as Tig..
So stoked to see this finished
Me too!!!
Truly amazing work, keep it up man. Not sure if you mentioned it but what exhaust is that? I never thought of cutting the flanges off an aftermarket exhaust to bolt up to the turbos, ingenious. Can't wait for the next video!
The end parts that we cut where just some basic mufflers I think 1320 brand, the mid section with the y in it I built him a while back. We couldn’t find just that y section for sale that’s why we built it. But now that it’s turbo the way it is I really think the stock smaller piping would be better, it might spoil faster ......but we will see......we are still testing this all out ....
Awesome video! Can’t wait to see the update!
Really looking forward to these videos to come. I am starting the same project next month. This is something I have been finding for about 2 years now. Can't wait to see how you Plumb the air change line piping back to the front. Single or duel??
Hot exhaust gas is needed to drive the turbine in the turbo. Love to see what kind of HP you get
compared with a conventional setup.
Im in the process of building my own rear mount single turbo kit for my 350z. Mounting the turbo was one of my concerns but this gave me an idea how i can do it. Ill be following this build for sure!
Sweet !! Let me know if you figure out any cool things as you go .....we are learning too.....
Wow, super clean setup, nice welding, I'm impressed.
All you people presenting worries of turbo lag should check out rizzy350z and ratrodcolt on instagram...
I tack with Tig to avoid Spark damage.i learned the hard way
Love this.. And yeah, you have to pull the damn motor just to put headers on in a Z..
Were did u got the turbo rear kit and exuast Fot my chevy silverado 03
Excited to see how this turns out. I was thinking of doing this with a single on my g35 6mt... think you'll want to heat wrap the whole exhaust to help spool.
Heat wrapping your exhaust will cook it and create exhaust leaks
@@GuyX2013 mmmm kay
Wrapping will only increase spool by like 100 rpm lol Mine spools at 2500 anyway ...instagram tree_fittyguy
@@austinbrown924 what turbo are you running?
@@GuyX2013 gt3584r
That exhaust hanger tool is the best !
I agree!
Gearheads Autofab my dad is old school and lost his mind when I showed him those lmao !
Correct me if I’m wrong these turbos look like eBay turbos. Are they. What’s the psi. Do you think they are good
Yep 89$ each made 400@8psi so I think they worked awesome
The WG should be at 45* the the exhaust flow. You are going to have a lot of boost creep.
i told you ur your youtube will start grow fast, good work my dude
Thank you for this idea, might use this for my 87 jag
Wheres Rizzy350z when you need him👀👀
Alex Yarur right. All these people in the comments act like rear mounts are the end of the world... It’s not as much lag as people think.
pyro90294 Exactly. Not to mention, you can get big power safely, with minimal modification to the engine and its components.
i hace a g35/skyline 350GT and im interested in this as well
nice! internet tells me stock internals are good up to 500whp on a 370, that could get real exciting! hoping 🐼 lets me have a go in it
i like how you set it up perfect for crazy rain water off the back of the rear wheels will go directly into the turbo...lol looks like a problem
Everybody seems to think this...but think about it. When you have cold air intakes where are the air filters..in front of the radiator directly behind the grill..so when it Rains you are getting just as much road sneeze and rain water on the filters.
New subscriber!! Like and share lol I like what I see. And I don't know how your not like 100k subs yet but your getting there 10k coming upp!!!
Please leave a like you guy's ☺️👍
Soooo... How are you going to run the Oil return line from the turbo to the oil pan? It will be a super long line and the turbos are mounted low in the back to allow gravity do its work.
I want this setup!
@Gearheads Autofab when you run the oil scavenging pump it has to be at a lower point than the turbos to let oil drain into it. The pump will last longer this way. Theres also some kind of valve ( cant remember what it's called atm) which sits in the return line and stops any oil from the pan to come back towards the turbos, you might Also want to look into installing one. Please keep us informed on how much lag you are seeing compared with other traditional front mounted setups and what the total wallet damage was in parts.
I have thought of so many possible things that I may need to address those are some of them. However .....I my goal is to keep this as simple as possible and only add parts as needed. So we are resisting the temptation to over build.
I have no lag
@@austinbrown924 you have a rear mounted setup with no lag? You are so full of shit its not even funny. Dumbass kid.
@@Executiveinvestments- tell me more about how you know my setup and have experienced first hand its capabilities or even remotely know anything about a turbo setup in general 😂😂 lag is a product of inexperience if you know what your doin you can have boost at any rpm you want
@@Executiveinvestments- btw z1 Motorsports posted my first dyno session on Facebook you could always check it out if you wanna be proven your a dumbass instead of just lookin like one
I hope the audience appreciate the content as much as I do.👍👍👍👍
If the oil pump is too loud upgrade to the turbowerx oil scavenge pump the diffrence is day and night
You need to rubber bush the turbo mounts to allow for flex, it's the reason exhaust system have bushes at all the mounting points.
I have 50000 miles on my rear mount and it is bolted via a steal plate to the trunk floor. No rubber what so ever..never has it come loose or cracked..that is what flex joints are for.
@@michaelcrimedog655 if they are a part of the system
Nice! Very interested in the outcome. How did you calculate your turbo sizes and how efficient do you think it will be. What is your expectation with lag?
We sorta used our budget to decide Turbo size lol these turbos are only 89$ each and we knew going in to this that we may change our minds on how we like the feel of the cars spool time and hp, the cool thing is that these turbos can be switched out for endless other sizes in the future if needed to accommodate what ever we need them to do. I did do some basic comparisons before we got them so I think we will be in a good spot 🤞
I have a 370z and would be interested in buying a set up like this from you
Ur gonna have an issue with the wastegates, the exhaust will wanna flow right past it, gonna need a pretty soft spring to make say 15 psi. Mayby like a 5 psi spring.
Dont wastegates go in between the turbo and intake and not in between the turbo and exhaust
@@traxxasLOVR really? That's a blowoff valve your thinking of. Wastegate controls boost and is on the exhaust manifold or on the turbo itself if its internal wastegate
@@tomjw7 ah. Your right. I was mixxed up
My mind is still trying to wrap around this concept
Man you do some clean welds! 👍
Is nt single turbo cheaper and easier to tune and runs better also more power ?
Yes for sure single turbo is cheaper and easier.
Probably that would work with an anti lag valve! If not, lag us going to be crazy!
no way around the massive lag hes going to have.
Turbos in the back aren't my thing. Too much lag difference compared to front turbos...unless you put a supercharger in the front, and keep those turbos in the back...wink wink :D
Twincharging err tri_charging?
People are worried about oil and etc but how much lag is this gonna have holy shit ...
not hating just hoping to see how it turns out
Maybe I’m wrong
I watched this probably moments after you uploaded it, but I didn't want to fire on the laptop to comment. I like this idea, and to be very fair -- it's a unique idea. I have a few questions:
1) Are you concerned at all about turbo lag and spool times?
2) Everyone below addressed the concerns upon the oil, however you would have two directions to go. Which route will you be taking? (Scavenger pump with the engine oil, or a separate look specifically for the turbos?)
3) While plumbing the intake piping, will you be concerned about the exhaust piping heating the intake piping?
4) Understandably, this would cool down engine bay temps. Why didn't you decide to mount the turbos right off the factory header-collectors (possibly lower) and fabricate pipes to go to each exhaust exit instead? Was this specifically to push temps down from around the engine bay, or due to fitment?
5) Why did you decide to go twin turbo instead of single twin scroll and bring the turbo closer? (Sort of like the Boosted Performance Single Turbo kit for the HR/VHR?)
6) Any thoughts on how you'll complete the exhaust?
A single turbo if properly sized with some attention to building the hot side..I go 3 inch to 2 5 to turbo and back to 3 at exits.and my lagbis almost non existence..I'm on boost at 2300 and on the gate at 2800 and no drop off till about 6700.. so the need for twin turbo can be quicker still..
So what was the cost for the setup??
It’s going to take another extra litres of oil to feed turbo and 2m 1/2 long hoses 😁😆 it’s something deferent but it’s not budget right
Nice project and you make it look easy for any one to do this👍 Love to see the rest of it!!! I build turbo kits for snowmobiles in Sweden for costumers. www.tikka.se And i have a plan to build a rear mont turbo on my BMW 750 E32. Same thing with the 750 no room around the V12 engine. I also have a 1990 Nissan 300ZX with bigger TD06-20G Mitsu turbos. I had to cut out in the frame part of the body to fit the bigger turbos in that car. Big front mont IC and 2x70mm Throttle bodys. Nitrous for spool. Running on E85 at 30 PSI boost. Car is scary fast traction is the biggest problem. Anyway i love to see the rest of your project and test drive. Wery wery intresting video 👍🇸🇪🇺🇸
Seeing Nisda and that’s basically what exist now
Do an x-pipe exhaust design from the turbos tll look cool
Oh yeah finally a real good diy video, make more 👍
Ah like a diy nissan sts style system, interesting.
Is there any benefit in mounting the turbos at the rear?
More space and less engine temp. So far that’s what we noticed, mounting turbos close to the engine is better if there’s room.
I can feel Turbo Yoda's pain from watching this
Bruh... c clamps... if you dont want to bolt down that vice, use c clamps to secure them to the table. Lol I hate chasing around my peice.
WHAT happens when you drive through deep water?🤔
Why would you be dumb enough to take a 370 through deep water in the first place? Even stock cars would get fucked easily in deep water.
iggibars Flash flood area.
The car will get flooded?
man you remind me of tommy the green ranger
🤷♂️👍
@@GearheadsAutofab hes awesome by the way hahaha Jason David Frank
Bro, you do an amazing work really appreciate ur videos
Is there a website where I can find these turbos?
Thank you 🙏
eBay
can you help me out?. id like to do this to my 2006 slk 55 amg. nobody makes a "kit" specifically for the car, and trying to find a mod/ tuner for mercedes is like digging for diamonds, but im thinking of using one of the sts kits that dont include the hot/cold air parts, along with an aftermarket fmu and a split second enricher. I dont plan to run the oil into the stock oil pan either, but rather mount an oil cooler in the trunk and give it its own oil supply. Any tips or heads-up on any unexpected issues you ran into would be extremely helpful.
Yes, I’d say we need better tuning that split second, one of the main things is timing retard for boost, then fuel increase as well. So you may need a better piggy back that can pull timing to compensate. As for the oil system.....I think you’ll find that it’s supper hard to send correct oil pressure to a turbo with a stand alone oil system, this is like the most common comment I get on UA-cam, if you don’t want to run oil from the motor you can run a oil less turbo from Comp turbo. Also I’m
Building 2 new kits soon and I have figured out so much new stuff about remote mounting turbos it’s crazy......
@@GearheadsAutofab thanks for the reply! I hadn't thought about the pressure being such an issue. I guess the scavenger pumps are just enough to help it along? Any advice on a decent piggyback that wont break the bank? Also, have you ran into any issues with crankcase pressure?
I would call aem and ask about using one if there computers as a piggy back, there pretty cheap, as long as it will work on your car, also you’ll need some one to build you a adapter harness that’s about 500$ to use it, call boolslang in California, they can make them
What do you think about Single turbo setup instead of Twin turbo's?.
Haven’t personally tried single rear mount yet, but it’s almost for sure cheaper more practical and will most likely make more power with way less complication.
@@GearheadsAutofab Yea, i was hoping it could be cheaper with a hybrid turbo or en ebay as you showed earlier. And Cool tank's for your opinion on my question.
@GearheadsAutofab is this kit available for sale?
you make a kit for this yet? id love to buy this setup
Now you got me looking at my z32 like hmmm🤔🤔
Do you have, a video, after your done with the instruction, you driving the car ???
Can u run small nos shot with this build? Or is it too risky?
You could but it just adds a bit of complication to the tune and then you always have up fill your bottle ….
I’m new to this channel but I’m just asking is the engine built. Cause those engines can’t take high boost
This doesn't look like it will work, I'll reserve judgment for now however.
BigHeadClan How so? Give your why nots maybe he can attack those problems in the beginning.
@@RagingBullNuts The big reasons why I don't think this will work at (least in an effective manner), can be found below but let me be clear
and say I'm still very curious of the outcome and who knows maybe this will flip expectations on it's head.
But anyhow my reasoning is as such.
The total distance the gasses must travel to actually spool up the turbos is an order of magnitude greater, by the time the gasses reach the turbo it's likely the potential energy of the exhaust gas will have been expended. Gas expands when heated, so when you have the exhaust gasses leaving the engine they are at their hottest and thus the pressure in the system the highest. This is part of the reason why turbos spool quicker when they are closer to the engine.
It will naturally cool due to heat transfer of the exhaust itself and due to the time it takes to reach the turbos. At best this means far less total boost being provided for the engine, and also significantly greater time for said boost to build.
Meaning your over-all engine response will suffer, this setup may generate some power but the over-all drive-ability of the car
is likely to be totally compromised.
BigHeadClan I agree turbos rely on heat expansion to spool up not necessarily exhaust flow. maybe the turbos have a special designed impeller wheels. I'm curious and would like to see if it does work
Eddie Castaner it’ll work but not effective as a traditional setup. A lot of lag is introduced in rear mount turbos and there are issues with oil circulation with low mount setups afaik.
He's definitely not the first to do rear mount turbos.
I love it man. Keep the inspiration coming
Shoutout to J!
is this kit available???
I'm particularly curious to see the air filters.
what's the horsepower increase ? my humble guess 180
where you bought the pieces make a list of what you bought or better put the pages where you bought the accessories
Mmm I would of ran the ic pipes together right from the turbz