daem0n

Has anyone ever tried a tri-turbo setup in the FD on the 2-rotor engine? I've seen a couple articles on the 3-rotor engine with a triple turbo setup, but never a 2-rotor, is there a reason for this? Why not have one turbo pre-spool the other two or just do all three sequencial since the rotory has such a long RPM range anyway. Or, one last idea would be to have two turbos on below a certain RPM and then switch over to the third turbo after that RPM is reached and shut down the 1st turbo (so basically one turbo is always on if it could handle that). What kind of turbos could you use to fit them in the engine bay?...I saw GT28's and GT2835's suggested for a 3-rotor application. I know it would be very hard to put this whole system together inside the engine bay, but I'm just curious what your thoughts are on it? Anyhow, just an idea...

2-Rotor

Racing Beat in California had a 3 turbo setup in their Bonniville Salt Flat testing car. Check the website www.racingbeat.com

I think that car did over 240mph on the salt flats and if i remember correctly it was in an FC body (2nd gen)!!

BATMAN

3rd gen.. did 242.

T88NosRx7

iTrader: (1)

before it crashed and ate it

maxcooper

Why not hook up 4 turbos? Wait, why hookup 3 or 4 turbos? More turbos weigh more, and if they aren't serving any purpose that one or two turbos can serve, they have no purpose. I don't see any reason to use 3 turbos on a two-rotor.

-Max

daem0n

for the simple reason that smaller turbos spool up faster...

rx7machine

I guess it would just depend on if the weight of all three turbos weigh less than one large turbo. And if three turbos would produce any more power than just one turbo could produce..

Shinobi-X

The tri-turbo setup spools faster, and gives incredible response, while keeping bigger HP numbers. I've seen it done on a Supra.

fdracer

this is just stupid, at some point you won't have enough exhaust energy to spool x number of turbos. twins for a 2 rotor is more than enough. anything more and you're just adding more cost, weight, and complexity. i single turbo w/ a properly designed manifold will outspool the stock twins or a triple turbo setup on a log manifold.

50tooslow

I just finnished up my 10 turbo conversion on my 2rotor! It spools up mad fast, I get positive boost by10,000 rpm!!!!!!!!!!!!!!!!!!

Zoomspeed

you know how to fix that right?!....................MORE ROTORS!!! mmmm 20b tasty.

vudoodoodoo

I'd rather have a single turbo.
I am sick of having twins and all that **** under the hood that go along w/ the twins.
Imagine have 3 turbos and all the other **** you need to run them.

IgoSlow

Only spools fast if you have enough exhaust to spool them as fdracer pointed out.. Reason it would be nice on a 20b becuase it has three rotors. One for each turbo. With a supra you could divide the exhaust ports to two for each turbo since it has six. (the twin setup for supra divides it 3 per turbo). So it would not be ideal or even smart to put a tri turbo on a 2 rotor. What would you do have one rotor push one turbo and the other push 2? heheh.. wouldn't seem to smart to me...

maxcooper

One small turbo spools faster than one big turbo, but the jury is still out on the relative spool times of single or twin systems with equal capacity as far as I am concerned. Does anyone have any links to interesting articles on this topic?

One larger turbo may be more efficient than two (or three, or four) small ones since the wheel-to-housing clearances will be a smaller proportion of the general dimensions of the turbo unit. I don't really know how true this is, either, but it is relevant to the discussion.

-Max

DavidR

I believe Pann Speed also had a 3 turbo car. I never saw any performance specs on that car though. They may have done it just to say they could.

CowsniperRX7

iTrader: (3)

I found this pic:



Imagine all this in a FD!!!

EDIT: I am very sorry for the size of the picture.

Sl0w7

neat but too much **** under the hood...
-Keith

daem0n

wow, some of you guys are really negative. It was a simple question of why it wasn't done, not why you thought it was the death of you. I'm glad a few of you had logical or factual points to make that would help out. Like one post pointed out maybe 3 turbos on 2 rotors is not good, then you could always have 4. Sure to a lot of you guys some ideas on these boards sound stupid, but without imagination or new ideas there would be no future for technology or the advancement of parts for your cars. Anyhow for anyone interested, I posted a pic of a 3-rotor, tri-turbo. I still think this is a very interesting project. Glad to see it brought interest into the eyes of some of you...

SnowmanSteiner

I think what he is aiming at is more a three stage turbo setup. The manifold would go from two ports to one port. From that port you would first power a small turbo, to get boost quickly, then start prespooling the 2nd turbo, switch over to the 2nd which would handle more midrange power, start prespooling the 3rd, then switch over to the third which would give you top end power. This idea would be incredible. You would have boost almost immediately and continue with it all the way to the top. The set backs would be that I think it would be somewhat complicated to make it work. Wouldn't be impossible though. Just design a computer that starts prespool and switches the turbos based on a set of look up tables. It might be hard to fit everything in, but as we see from these glorious pictures it can be done, even on a triple rotory. As far as people saying that it looks like it takes up too much space, an engine bay was put there to hold the engine and components why not use it for its purpose. I do agree though that there might be problems with heating. But it ain't nothing that an endothermic vein type set-up couldn't fix. Just my opinion. I agree with daem0n. If people weren't asking questions or coming up with their own ideas, where would we be today. You think if Felix Wankel asked his friends if they thought a triangle spinning around in an oval was a good idea for an engine, and they told him that was the dumbest idea they ever heard, that he would've listened to them and not made it? You never know he could build a set-up like this and obliterate all our butts and then make millions off it. You never know.

- Steiner