EmperorBen

Hi all, I have always been interested in twin turbo, but to be honest; I never really known what it is. like i know it's two turbos, but how do you do it and with what? so anyone have twin turbo or can enlighten me more on it??? please?

cjkim

x2

not sure if you're being serious...
but if you are, here's a quick summary:
1. a properly sized single > turbo
2. reading > posting
3. 18 yr old that wants to learn to drive > 18 yr old that wants a turbo

Falken

I'm going to answer you, because everyone else on the board is too good for answering questions without flaming.

Twin turbo is a way of running two turbochargers to boost the engine. Running two small turbochargers to achieve the same boost as one large one reduces the time it takes for turbos to spool and provide power. Turbocharging is always a tradeoff though, if you use two small turbos to boost and engine, they'll run out of steam by the end of your powerband.

Sequential twin turbo is IMHO more interesting. Sequential uses two turbos, one small and one large. The little one comes on at low revs because its small and light, and by the time the revs get high enough for it to run out of steam the big one has started to take over. That is the kind of system that the RX7 had.

Usually turbos are used for each cylinder bank in a TT piston engine, so for our car I assume you would use one for each rotor.

But I also read somewhere that twin turbo for our car is practically pointless, dont remember why.

Wikipedia is your friend!

alnielsen

iTrader: (4)

Actually, it's early and the natives haven't got restless yet. And not getting answers to this question are a good thing. This question is usually asked an someone new to the RX8, but a fan of the FD RX7. When this comes up, the OP usually get a bunch of smart *** replies and the thread gets closed.
The twin turbo system could be troublesome on the FD, which is why the aftermarket originally started to go to the single turbo. A side effect being that you can get more boost with a single turbo. The reason it won't work on the RX8 is the Renesis engine. The exhaust comes out 3 ports. Getting that to work with 2 turbos would be too complicated.

mysql

reason why we don't need twin turbos is because a properly sized turbo can get you big boost at low rpms and up high. So there is no need for added complexity and cost associated with running twins.

heyarnold69

iTrader: (1)

dont listen to them man..... get your twin turbo, list your parts and make sure you use a cobb accessport to tune. then make a new post to include but not limited to:
turbo parts list
additional parts needed
modifications needed to stock parts
base and tuned maps used

History / As built plans

Then many more of us can have twin turbo cars If possible-- go with the supercharger / turbo combo and get that to work.

Zelse

iTrader: (12)

^--- W..T...F? Dude I don't know if thats a wise *** remark or you being really ignorant..Supercharger/turbo combo? Are you serious?

-_-;;

Renesis07

iTrader: (1)

Your advising a newbie to forced induction to go twin turbo to help you out

Or are you being a douche?

Razz1

Better lock this thread before it gets ugly.

9krpmrx8

iTrader: (46)

Wasn't ther a mini and a MR2 produced with a supercharger and a turbo?

http://www.jscspeed.com/mini/interco...it_coopers.htm

mike1324a

and a vw

dozer

iTrader: (3)

OH WAIT...OMG!!!!!!!!!! LMFAO!!!!!!!!!!!!!!!! DUDE!!!!! I KNOW YOU HAVE TO BE FROM either BOLSA or WESTMINSTER, or GARDEN GROVE!! ROFL!!!!! ahahahahhahahahahahahhaha....DUDE this is SOOOO epic, and PLEASE dont rice out your 8...

dozer

iTrader: (3)

sorry ben just had too...so many people out here that are ricers especially in my area, they think they know it all...but twin turbos NO, one big turbo YES

twin turbos on a v6 or inline 6, YES
twin turbos on a twin rotor, NO
twin turbo on a 4 banger, HELL NO

Jedi54

iTrader: (7)

twin turbo = 2 turbos
Worthless on an RX-8.

mysql is right: a properly sized turbo is the way to go as you'll get power throughout the power band.

You should go to the local meets and talk to some owners, we'll get you straightened out.

mysql

now, if we were able to do 800 hp on the rx8, then I might say twin turbos would be useful. However for 400 hp, really no point since a single turbo can spool up fast enough at low rpms and push enough air for the upper rpms.

Jedi54

iTrader: (7)

but don't you need a turbo for EACH rotor????

heyarnold69

iTrader: (1)

hahaha turbo for each rotor..

Listen if he's got the money to get a sc / tc combo to work and then share .. who am i to stop him.

i learned on a turbo car, whats your point. i drove funny cars when i was 10 years old (helps when a lot of people in your family race). In HS, I had a twin turbo 7 ... Ive also driven big block muscle.

You can get lessons on circuit tracks in CA very easily.

How does anyone know what is impossible with a rotary. the R&D on the rotary is no where near the piston engine!!!



To the original poster .... don't let anyone shut out your ideas man. But honestly... Get used to 200 whp before considering anything else. When your engine load is greater than 75% for most of a run ... then consider increasing the output to 400 max output. Dealing with turbo lag changes the way you have to drive your car. there is also a debate on going to either a super charger or a turbo charger or a hybrid system.

Currently available right now is the petite racing s/c or a turbo from somewhere like petite, esmril, greddy (still?) or something like that. there is a huge cost involved in getting a custom system up and running. there are twin turbo systems out there in the trial stages in places like Australia and japan but nothing to hit the mainstream as of yet.

I say post the system components because there may be other people working on a similar system that can tell you why thy went one way or the other on a specific part. with anything, the subcomponents matter more than the entire system because a slight variation in one component such as obtaining constant intake charge temps (air - air, vs water - air) could mean the difference in an engine even running or not.

Kane

iTrader: (1)

One for each Port.... TRIPLE TURBOS.......in parallel.

Just get some GT1471R's.....

Atilla

iTrader: (1)

Screw turbo's!!

GET

greg985

I actually just orderd 6 turbos for my car, one for each face of each rotor. My car is gonna be hella fast. Hopefully i get them on soon b/c my frind has a civic and wants to race me next week, he said thats when his V-tec is gonna kick in

StealthTL

iTrader: (1)

6 turbos - what a dummass!

There's only THREE exhaust ports, so 3 be the max turbos!!

Sheesh....

S

mysql

no, twin turbos per exhaust port is where it's at

greg985

I made some more exhaust ports myself

ShinkaTeen

its getting ugly.

dozer

iTrader: (3)

this has been asked plenty of times, and here we are explaining yet again...

i JUST LOLed