Me and a buddy (both Mechanical engineering students) are trying to brainstorm to come up with some design project ideas for a class next year. He is also motor head so we are both so pumped about the upcoming project that we are going ahead and getting a head start. We were thinking of doing something geared towards the 350z platform since i am so familiar with it and have torn the thing apart and put it back together more times than i can count. I was tinkering with the idea of how to produce a simple turbo kit that would be as install friendly as possible and offer a better price point. This got me thinking about a twin turbo set up that would utilize the stock manifolds. Now i haven't even begun to look at efficiencies or design limitations, but first want to gauge if this is something that would be of interest to the community.

I know this would not be a superior kit hp wise to some of the other options out there, but basically this is just a idea that i had that would allow us to follow through a design process required for the course. Just want to see if this would be a option to consumers or would most people turn their noses up to the idea and opt for a current design.

Any thoughts?

 

I'm sure your gonna get flamed soon F/I guys seem touchy lol

How does twin turbo work on stock manifolds? This should be a cool project

 

Interesting...

 

it would be easy enough to make something that bolts on the stock manifolds, however twin turbos dont fit with budget, 1k+ x2 dosnt compar to 1k x1. budget would have to be single turbo, andddddd as far as budget is concerned sasha has that market cornered you will have a hard time competing with his quality and price both(might be able to do it cheaper at lesser quality or mayby same quality at a similar price)

the other major advantage to twins is closer to the ports so it retains more velocity and heat for spool up, simply bolting adapters to the stock manifolds is going to eliminate some of that. if you wanted budget i would figure out some way to get flanges cheap and make sch 40 pipe manifolds.

also we arnt touchy we simply hate answering the same damn questions all the time, he asks if the would be interest personally i think unlikely but since im already boosted then im not really the target market.

 

He wont get flamed at all cause he has been here a long time noob and been thru most of it...lol

 

Just throwing this out there, the STS kit uses the stock manifolds. Granted, its a single turbo, but if someone was so inclined, they could easily make it a Twin set up.

 

Curious also.....

 

Should gave clarified a bit my car has been been boosted for many moons and i have been reading this site since around 04 (the good ol days) so I know how ruthless it gets up in the fi section.

I have a built SFR TT setup that made 722 whp on race gas so I won't be changing anything on my car. This isn't some desperate kid trying to throw together a hack setup in his garage just so he can say its boosted.

Like I said this is just an idea right now. Not making any promises or things of that nature. I just like knowing that if I am going to put a lot of work into a project and it produces a positive result that I can at least have the possibility of it being lucrative.

 

That was my first thought when I saw that kit years ago. I can't ever leave well enough alone. I think I remember seeing they made a twin rear mount for the vette. If i remember right he vette setup had a cool charge pipe setup where they were routed it inside the body panels.

 

You don't simply want to just have the turbos as close as possible to the exhaust ports. You have to balance runner length and the merging of the gases from each runner in the collector so it will not cause decrease in the volumetric flow rate. Case in point are my long tube manifolds from SFR. They are far superior to the greddy log style short manifolds due to the manner in which the runners converge. The expansion of the hot gases in the turbo produce the work to the compressor housing, but the flow rate determines the magnitude of the output.

As far as markets go I am not sure that everyone looking for a cheaper solution wants to have a single setup. I know when I started looking back in 06 there was no way in hell I would have gone with a single setup. It just wasn't in the cards since I was dead set on a twin setup. I am sure there are other people out there with the same thoughts

 

This would be a good start:

https://my350z.com/forum/forced-indu...n-pics-11.html

With the new GTX turbos, and Tial V-band housings this would be a lot easier to do now. I just never had enough time to cmoplete that project....maybe visit the idea one day down the road. Then you would have to use external wastegates, and all this combined will not be cheap.

 

Thanks man! I was hoping to use a vband connection to save on clearance room between the firewall and the engine/transmission so that is good news. I am sure you know cheap is a relative term. I haven't priced out things yet and haven't been in the mix for the last couple of years w/ school keeping me busy and the car cooperating so i am not sure what prices are. My thinking is i a product that can be offered for under 5k and allows the consumer flexibility in injector and ems options all while allowing them to install in their garage could offer a significant price advantage. For instance if you buy a greaddy kit you are spending 6k out the gate plus a new ems (theirs is useless), more than likely new injectors, fuel pump, and that good ol 2k dollar installation cost if you don't have work room and a engine hoist. I am sure you know all of this, just thinking out loud

Always have admired your work and thanks for the input. Like i said i have no intentions of competing with you since i don't even have a company. I still have 2 years of school left, a son on the way, and a internship that keeps me busy so this is more me and a few classmates with some ideas and ambition. If something comes of it then great, if not than on to the next one

 

if you are going to be doin this for a project, why not do something different. say a rear mount sequential or compound turbo setup. that would be super simple to install and easy to swap things in and out to test combinations.

you'll have to figure the proper turbo sizings based on flow maps, etc etc.

i think that would generate more interest than another 'budget' tt kit

 

thats actually a good idea man and i am glad you reminded me of it. In the past i have played around with the idea of it but got frazzeled when thinking about the cluster **** of piping that it would produce. The fluid dynamics may be pretty nasty but i will certainly take a look.

I am just starting to learn about work cycles with multiple out put sources so maybe once i get a better understanding it will not look as daunting.


Btw what did you end up tunning your car to? Haven't been around in a while and last i remember it was like +900whp or something stupid like that

 

partially true, you can have equal length shorty's, long tubes might be better then cast manifolds on the twin kits but they wont perform as well as a good set of shortys designed to work with FI(such as momentums reworked slightly.

long tubes are designed very specifically to time the pulses perfectly so that no pulse hits another in the exhuast and creates a slightly vacuum to improve scavaging. its also impossible to produce a truly effective long tube setup for every car because it has to be specifically tuned for that engines power band. at best you get a semi ok setup that works ok for most setups, its useless for turbo setups because the manifolds will begin to build backpressure so the pulses are going to hit each other. so the end result is your trading a very slight benefit over the cast log type manifolds for slightly better spool up on initial spool up(and worse power up high due to less heat and velocity up high where the pulses dont matter) vs a well designed shorty header type manifold design which will outperform both.

 

i would definitely be interested in seeing a properly designed compound setup be interesting to see what would happen with something like a gt30 mated to one of the larger t6 frame turbos.

something like that thread i posted the other day only used a single intercooler and dint try to intercool both compressors.