twin turbo sr20

[polyS13]

Is it possible to turn the Sr20 black top for the S14 into a twin turbo or is it unethical and a waste of money/time. If it can be done how would I go about it. As I know very little about turbo's. Any help is appreciated

[Holisticbeatz]

Do your homework kid.

[ItzGenX]

Twin turbo 2L LOL!!! All show no go. It will take 10 years just for one turbo to begin spooling. Who knows how old you will be when the second turbo kicks in.

[sultan]

it's been done, just search for "sr20dett" and you will find a couple pics and much discussion. you're better off with single turbo.

[revhard05]

why do you think the hks makes a kit to turn the twinturbo supra into a single turbo??? (more power at higher rpm)

[TommyTheCat]

Twin turbo 2L LOL!!! All show no go. It will take 10 years just for one turbo to begin spooling. Who knows how old you will be when the second turbo kicks in.

Wow, a twin turbo 1.3liter must REALLY be a joke....oh wait...

And polS13, It's just a waste of money.

[I H8 UR DSM]

[polyS13]

Thanks for all the help

[ItzGenX]

Quote »Wow, a twin turbo 1.3liter must REALLY be a joke....oh wait...[/quote]

A twin 1.3L would be a mazda 1.3L rotary engine. Remember, rotary engines work differently then what a piston engine does. A rotary engine per rotor will go through 3 combustions per rotation, whereas each piston in a piston 4cycle engine will go through one combustion every other rotation. So that rotary engine is really acting three times its normal size, 3.9L (in working terms).

[180fan]

RHD as your steering column will be in the way, custom manifold, lots of lag unless very small turbos, and alot less space in your engine bay.

[Onizuka]

A twin 1.3L would be a mazda 1.3L rotary engine. Remember, rotary engines work differently then what a piston engine does. A rotary engine per rotor will go through 3 combustions per rotation, whereas each piston in a piston 4cycle engine will go through one combustion every other rotation. So that rotary engine is really acting three times its normal size, 3.9L (in working terms).

there is actually allot of aguments on rotory engine displacement, i reacently read in some magazine it is 2x what mazda says, or 2.6 liters. Oh yeah, a rotory doesnt get 3 combustions per rotation, its a tad bit more complicated than that concidering that there are two rotors and the output shaft spins at 3x the speed of the rotors which means one rotation = 1/3 the rotation of both rotors which = bla bla bla you see what i mean, there really isnt any formula for getting displacment out of rotory engines

twin turbos can be more effective than single turbos but like everyone else said, its just a waste of money to make a custom progressive(?) turbo setup.

[Onizuka]

i dunno, rotarys are complicated, this is good at explaning it:

http://travel.howstuffworks.com/rotary-engine4.htm

[ItzGenX]

J-Spec, scroll down to the link you gave me and read this,

"in one complete revolution of the rotor, there will be three combustion stokes. But remember, the output shaft spins three times for every complete revolution of the rotor, which means that there is one combustion stroke for each revolution of the output shaft."

I didn't say anything about the output shaft. I said the rotor will go through three combustions per rotation.

Go to the next page and read this part,

"each combustion event lasts through 270 degrees of the output shaft's rotation. This means that a single-rotor engine delivers power for three-quarters of each revolution of the output shaft. Compare this to a single-cylinder piston engine, in which combustion occurs during 180 degrees out of every two revolutions"

Since the piston engine has to go through two to get 180 degrees, cut that in half to even out the effeciency between the rotary engine-270 degrees rotary vs. 90 degrees piston per rotation- This is equivelant to 3 times the piston engine's efficiency. To get to the point, I am not pointing out rights from wrongs, but I'm pointing at why a 1.3L twin turbo rotary can spool such turbos alone. Slap two of those turbos on a 1.3L piston engine and watch the motor choke to death.

[Onizuka]

you point is well proven but a 1.3 liter piston engine could support two turbos (maybe not quite as big as the rotory's). ive seen a .7 liter 4 piston engine with a turbo on it and it made a bunch of power, fast as hell too.

[ItzGenX]

I dont think slapping two pea-sized turbos onto the sr20 would be so great. Even if the turbos are within range to spool with the engine's efficiency, the turbos themselves wont support too high of a efficiency map. They would be more of heat pumps then anything else. Those people in japan who slap twins on their sr20s are for show only. Those turbos are too big to spool unless they have a 10k or higher redline.

[sultan]

on driftworks.org they have a twin turbo CA project, although it is bored and stroked to 2L i still don't understand why.

[TommyTheCat]

Ugh...a 1.3liter rotary competes with 2.6 liter v6's, but in no way actually has or acts as though it has 2.6 or even 3.9 liters of displacement. I was saying it as a joke, because rotarys are known to make a lot more exhaust because of their design. But again, people have already proven the "2.6" liter rumor to be wrong.

check out rx7club.com and search just for "2.6 liter". There have been too many threads already...

[swr]

ok its not the size of the turbo that determines the spool there are some very big turbos that out spool smaller ones iestock dsm 98 eclipse gst (my car) starts spooling at 3 grand when i finally yanked it i put a 18g greddy on it, it starts spooling at 2 grand but more importantly its the displacement of the comustion chamber so if u were to stroke the motor u would get a greater volume of air exiting the motor and that in turn gives a faster spool of the turbo but to kill some spool time (and loose top end) a sequential system should work

[jEzTeR]

I herd or read someplace that the Inline motors run better off of a single turbo and V blocks can be boosted with the twin setup and do better.Is there any truth to that.It made some sence to me because almost every really fast supra is converted to the single T setup.Then I thought about it and was like wouldnt Toyota have figured that out by now?LOL

[robyc]

i would think twin turbo good on v engines because they got two intakes, dunno really though?

[Onizuka]

V6 and V8 turbo engines are always twinturbos because it would be a piping nightmare to get a single turbo setup on there. Single turbo setups are usually used only on inline or boxer engines.

[TommyTheCat]

Yeah, V engines use two separate turbos to feed each bank of cyl. Just think two single turbo'ed I-4's stuck together.

[jEzTeR]

How about the Twin Turbo 5.7l in the Vette?Now thats bad aZZ

[Onizuka]

quad-turbo V12s is where its at.

[Siddhartha]

^^^ weeeeeeeeeeeeerd . . .

[Nurv]

like the new ford show ***** that was in motor trend like almost 2 years ago. v10 withquad turbos and price tag of like $800k. not sure of the exact details but something amazing along those lines.

[Erban32]

you would use two smaller turbos instead of one large turbo. two smaller turbos spool faster giving you more low end power. the surpra is converted over to one turbo because those engines are producing enough power to spool a turbo the size of you head. and they are looking for high bost at high rpm.

[Inabj2]

Do your homework kid.

Translation: I don't know.

[NeedCAforS13]

j-spec...v12 quad turbo...i think not!!! w16 quad turbo's where its at:ylsuper !!!

you seen the new bugatti eb16-4 veyron?

1001 bhp @ 6000 rpm and 922 lb-ft at 5500

0-186mph in 14 sec and top speed of 252 mph

oh and here's the engine:D...

http://www.supercarsite.net/im...3.jpg

Sean

[Nathan]

I think I just messed myself...but I also think it needs BIGGER turbochargers those just look so tiny compared to the engine!