Twin turbo? [Merged 11-6]

[sacestar836]

built t58 or twin t25s?

you should know my choice

 

[Groomz]

What if you replaced the engine with a turbo also, TRI-turbo!!!

( That was a joke, I think )

 

[jpolizo]

There are two basic kinds of dual turbo setups. Running the turbos in parallel means that you basically have two identical turbos running at the same time and get twice the airflow. The theory there is to run two small fast spooling turbos, but get twice the air moving.

The other way to run two turbos is a sequential setup. In that case, you run a fast spooling turbo as boost starts to build, so you get little lag. As boost goes up, the second larger turbo starts to spool and that's where you get big power. This approach is much harder to tune.

 

[FastRthenU]

This question again
You can twin turbo a weed wacker if you want. Is it a good idea....NO
There is your answer

 

[1badtsi]

stupid a$$ idea

 

[Defiant]

You can melt pistons more efficiently, more quickly, and much more cost-effectively with NOS. o, sorry, nawzzzz.

 

[boostineklipz]

Two turbos are not always better than one.

 

[DSMJim]

Common for show cars and guys who are stupid and want to have something that other people think is cool twin or tri turbo is crazy. You obviously have to know absolutly nothing about performance to want twin turbo however...

Just look at how cool this example is. A VR6 with three K03 turbos'. It must go 3 times as fast!!!

 

[ABK]

It's alot more efficient to run a single turbo, plus you gain weight with twin turbos.

 

[out there]

mmm... one of my favorite lines... "possible? yes expensive? yes. worthwhile? nope."
anyone care to guess how long until this thread gets locked?

 

[BD1]

Does anyone know how I can get in touch with the OZ company to see if I can get a replacement center cap for the 2G OZ edition wheels? Would the dealership be able to get them? Any help at all, thanks.

 

[interceptor]

Yes the dealer has them but there $16 dollars per cap.The Evolution OZ Edition uses the same ones..

 

[jdm93dsm]

do they make a twin turbo setup for a 1g NT? if so, who makes it? how much boost could a stock NT take? what would need to b upgraded to raise the boost?

 

[eclipsed95]

If you do a search for "twin turbo", you'll find that this has been discussed before. Most people will say that single turbo is the way to go, but I believe that the two turbo thing has been done. Probably not to a NT though. Good luck

 

[90N/TWo0tW0ot]

You would have alot of piston problems if you turbo a N/T... especially if you used a twin turbo. The turbo block has oil squirters under the pistons for cooling and lubricating. Other than attempting to install those on your block, you would want more aggressive cams.. not too hard to find and install. Your best bet is to buy a turbo block and twin turbo it.

-Travis

 

[Megags]

You'd have to have a turbo block, otherwise you'd have to find some way to get both turbos to only put out at max 4-5psi. Most go with the theory, why get 2 turbos that spool quickly, create traction problems, when you can get a bigger turbo that can put out just as much as 2 turbos w/ only a little lag that really won't hurt anything. It's much cheaper to get 1 as well.

 

[TimG]

It's easy. Heres how you do it. Grab 2 big turbos. Pop your hood and drop them in wherever there is space. Instant twin turbo baby!

Seriously, no one with a 4G63 has ever attempted to twin turbo their DSM because in reality, a single turbo is way more efficient. If you haven't noticed, factory twin turbo cars are 6 cylinders not 4 bangers. Exhaust gases are scarce in a 4 banger for 2 turbos. Not to mention factory twin turbo guys with money are swapping over to a single large turbo. I am constantly seeing smart twin turbo guys converting to a singe large turbo.

Unless the car has a series set-up intake system where the 2nd turbo is compressing compressed air, the twin turbo car is almost stupid for 4 cylinders. All it is is some fancy name to make people believe your car is faster because it has 2 "go faster goodies."

As for your block, it's fine. Just get a logger and make sure that you NEVER see knock and you'll be laughing. Your engine will last forever and have high compression. No oil squirters? Who gives a f*ck. They don't do a whole lot. The only problem is the fact that your piston's ring landing is closer to the top of the piston, which makes it vulnerable to detonation. If you get no knock throughout 1k-8k rpm in all gears, you won't have an engine issue.

 

[E-CLIPS97]

Wasnt the Dodge Interceptor from the movie The Wraith a twin turbo 4 cyl. engine? That Movie was awesome. I believe it had dual T-25 turbos. Anything is possible, but ya 1 turbo should definatly be enough.

 

[supergoat]

Originally posted by TimG
As for your block, it's fine. Just get a logger and make sure that you NEVER see knock and you'll be laughing. Your engine will last forever and have high compression. No oil squirters? Who gives a f*ck. They don't do a whole lot. The only problem is the fact that your piston's ring landing is closer to the top of the piston, which makes it vulnerable to detonation. If you get no knock throughout 1k-8k rpm in all gears, you won't have an engine issue.

Thank you! I've been saying for months now that the N/T pistons will hold up just fine as long as the car is tuned well. My N/T pistons have seen up to 13psi with 0 knock and I've had no problems out of them.

 

[Morphius]

This has been some rather good discussion. Kid, GO FOR IT!!!

Originally posted by GRNDSM
-Serial – exhaust gases pass through both turbos at the same time, turbo A brings the boost to x psi then dumps it into the inlet the turbo B, which bring it up to additional y psi for a total result of x+y psi. This is rarely done in some really high boost applications.

If I recall correctly, this is what they run for diesels used in tractor pull competitions. 2, 3, even four turbos used in series putting boost well over the 200psi range. Now, that's some serious boost!!!

Wouldn't this setup be the safer route to take? If the goal is 16psi total, he'd be runnin' 8 on each turbo. It'd save wear and tear on it.

If I had the time to try to TT a 4G63 this is the route I'd go.

 

[Morphius]

Better yet, how about a hybrid? Go Parallel for the exhaust but serial for the compressor?

Obviously the Parallel setup does work based on the archive article. He could take advantage of the compressor side by going Series and lowering the boost level on both turbo's. It's also save him some space for tubing routing. And yet, still only require one intercooler.

 

[BUCK]

Jeez - 95TalonTSI started drinking kinda early this New Year didn't he?

There are several things in life you don't need 2 of...

2 Sets of Golf Clubs, 2 Girlfriends, 2 Jobs, 2 Turbos, Etc, Etc...

 

[focusedrage]

2 fast 2 furious

 

[bigjangin]

I believe in the talon digest that someone already has put 2 t-25's on an eclipse. It was a good read.

 

[MNGSX]

The best sequential system I have seen is a sequential/serial twins on a 2003 dodge cummins.

It makes normal stock like boost way way low so it can still tow. It also makes a compounded boost when both are spooled that propels a vehicle that big into the 12's. or lower.


Maybe keep one T-25. then get something huge bigger than 20g. Get a t/3 or t/4 turbine housing... non hybrid for the second.


Hot side.


The small turbo gets exhaust first.

Turbine outlet connects to big turbos inlet.



Cold side...

The large turbo intake goes to the airfilter.

The large turbos outler goes into the small turbo..

The small turbos outlet goes to the IC system then the tb.


What happens is the small one spools first. It actually draws air thru the big one.... helping it spool a bit. As exhaust gas flow increases eventually there is enough to get the big one going. Once it is spooled it really mostly pushes air thru the smaller one.

That is the only attempt at a tt 4cyl I'd ever do.

The piping does'nt need to be as bad as you make it out to be.
Get a tubular o2 housing for a mitsu cut the dp flange off and weld a garret t3 or t/4 on that end. Bolt the big ones turbine inlet to it.
Everything else can be done with al and silicone couplers like UICP'
s



Final compounded psi can be a lot with that type of sequential.. I have seen a truck hit almost 100psi. It had o-ringed heads, all boost control and gauge lines were ss braid with AN connections.


The t25 plus something 20g or bigger would do maybe 50psi.....