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-   -   Inspiration -- 240 Style (DONT POST YOUR OWN) (https://forums.turbobricks.com/showthread.php?t=172878)

gaurinn 05-09-2011 05:09 PM

...
 
Quote:

Originally Posted by Cameron (Post 3620066)
Did this one not get posted here yet?!

https://www.ipdusa.com/uploads/images_blog/1048.jpg


is this b200e?

Group A 05-11-2011 06:35 AM

Quote:

Originally Posted by D.E (Post 3751921)

This is for sale right now. Somewhere around $43k.

240ft 05-12-2011 03:56 AM

http://forum.vccn.no/showthread.php?t=23230

RCArmy434 05-12-2011 04:03 AM

Quote:

Originally Posted by 240ft (Post 3761242)

I wonder what hes moving onto... i wouldn't mind getting a set of those wheels off of him, considering he has 3 sets :-P

gaurinn 05-12-2011 10:22 AM

????:-(

swedishK 05-12-2011 10:32 PM

at first i was like, why such a dinky turbo on such a beastly motor? then i was like oohhhhhh there's two!

CFL940 05-13-2011 10:16 AM

Twin turbo on a 4 cylinder... Dont see the advantage.

simey_binker 05-13-2011 03:06 PM

Quote:

Originally Posted by CFL940 (Post 3763238)
Twin turbo on a 4 cylinder... Dont see the advantage.

fast spool, high boost? looks like the dude knows what he's doing...

Sim

CFL940 05-13-2011 04:49 PM

Doesnt matter how many turbos you have, spool will still run out based on size. Not going to get higher boost levels than a large turbo just because there is two. As far as spooling faster, youre splitting exhaust flow in half, therefore less flow into each turbo equals less pressure to spool.. slower spool.
Not saying he doesnt make good power, but dont see the advantage over one good sized turbo. Other than a more efficient steady flow of PSI. But not in spool or high boost.

84 Blue 240 05-13-2011 05:10 PM

Quote:

Originally Posted by CFL940 (Post 3763858)
Doesnt matter how many turbos you have, spool will still run out based on size. Not going to get higher boost levels than a large turbo just because there is two. As far as spooling faster, youre splitting exhaust flow in half, therefore less flow into each turbo equals less pressure to spool.. slower spool.
Not saying he doesnt make good power, but dont see the advantage over one good sized turbo. Other than a more efficient steady flow of PSI. But not in spool or high boost.

Ummmmm....no

adrianpike 05-13-2011 05:15 PM

Quote:

Originally Posted by CFL940 (Post 3763858)
Doesnt matter how many turbos you have, spool will still run out based on size. Not going to get higher boost levels than a large turbo just because there is two. As far as spooling faster, youre splitting exhaust flow in half, therefore less flow into each turbo equals less pressure to spool.. slower spool.
Not saying he doesnt make good power, but dont see the advantage over one good sized turbo. Other than a more efficient steady flow of PSI. But not in spool or high boost.

:rofl:

spruill244 05-14-2011 02:46 PM

Quote:

Originally Posted by CFL940 (Post 3763858)
Doesnt matter how many turbos you have, spool will still run out based on size. Not going to get higher boost levels than a large turbo just because there is two. As far as spooling faster, youre splitting exhaust flow in half, therefore less flow into each turbo equals less pressure to spool.. slower spool.
Not saying he doesnt make good power, but dont see the advantage over one good sized turbo. Other than a more efficient steady flow of PSI. But not in spool or high boost.

...............

RESURRECTED 05-14-2011 03:08 PM

Quote:

Originally Posted by CFL940 (Post 3763858)
Doesnt matter how many turbos you have, spool will still run out based on size. Not going to get higher boost levels than a large turbo just because there is two. As far as spooling faster, youre splitting exhaust flow in half, therefore less flow into each turbo equals less pressure to spool.. slower spool.
Not saying he doesnt make good power, but dont see the advantage over one good sized turbo. Other than a more efficient steady flow of PSI. But not in spool or high boost.


rather then laugh at you, I would rather explain a bit here for you.
twins work better because your aloud to run two smaller units to create the same amount of boost, and where you stated it would spool slower is actually the opposite. they spool quicker due to your now allowing a better overall flow of the entire assembly.

...as well as hitting your target PSI faster, your now running a bit less then twice the CFM's at the same boost level. making a significant difference.
twinturbos are the only time I have been in a FI car that is over 400HP but has throttle response an feel of being NA.

Jordan 05-14-2011 03:10 PM

Quote:

Originally Posted by CFL940 (Post 3763858)
Doesnt matter how many turbos you have, spool will still run out based on size. Not going to get higher boost levels than a large turbo just because there is two. As far as spooling faster, youre splitting exhaust flow in half, therefore less flow into each turbo equals less pressure to spool.. slower spool.
Not saying he doesnt make good power, but dont see the advantage over one good sized turbo. Other than a more efficient steady flow of PSI. But not in spool or high boost.

THIS guy ova'ere!

84 Blue 240 05-14-2011 08:39 PM

The reason why two turbos typically spool faster than one is that the wheels of two smaller turbos have a lower combined moment of inertia than a single large set of wheels. Moment of inertia for a round disk is (m*r^2)/2. So even small changes in radius have a significant effect. Similarly, larger wheels are not only larger in diameter (remember, volume also has radius squared), but longer as well. They also require "more beef" to support the larger forces on them, so they usually weigh more than two smaller wheels.

Regarding "pressure to spool," there is no less pressure to spool each turbo. Enthalpy into each turbo will be about the same, it will just have less mass flow available. Ultimate shaft power from each turbine will be less, but combined potential power will be similar.

tree18is 05-17-2011 02:08 PM

That green car is amazing

Captain Bondo 05-17-2011 03:10 PM

Quote:

Originally Posted by 84 Blue 240 (Post 3765165)
The reason why two turbos typically spool faster than one is that the wheels of two smaller turbos have a lower combined moment of inertia than a single large set of wheels. Moment of inertia for a round disk is (m*r^2)/2. So even small changes in radius have a significant effect. Similarly, larger wheels are not only larger in diameter (remember, volume also has radius squared), but longer as well. They also require "more beef" to support the larger forces on them, so they usually weigh more than two smaller wheels.


The first ~12mm of diameter is wasted though, contributes nothing to mass flow, or shaft power. And you have more bearing drag with 2 shafts. To what degree these issues influence performance will vary with the design of the specific turbo.
Also a lot more heat loss through 2 open housings vs. a single divided one.

IMO it's pretty much a wash if compared to a twin scroll set up with dual wastegates...

Volvo-245- 05-17-2011 08:09 PM

The 244 Cab

http://i1124.photobucket.com/albums/...2/IMG_2393.jpg
http://i1124.photobucket.com/albums/...2/IMG_2400.jpg
http://i1124.photobucket.com/albums/...2/IMG_2399.jpg

Jerd 05-17-2011 08:55 PM

Fuuuuuuuu those wheels, i want them!!

CFL940 05-17-2011 09:05 PM

me 333

Streetkarnage 05-17-2011 09:34 PM

http://i28.photobucket.com/albums/c2...-JOSH264-3.jpg
Newest member to the SK family :)

more photos can be viewed HERE

cookiemonster 05-17-2011 11:47 PM

^ I'm inspired by all of your cars :godlike:

doucheNozzle 05-18-2011 12:01 AM

Quote:

Originally Posted by Streetkarnage (Post 3769433)
Newest member to the SK family :)

That's nice. This isn't a show off your own car thread.

Harlard 05-18-2011 12:08 AM

Hi Scotty, nice to see you back :wave:

doucheNozzle 05-18-2011 12:09 AM

Thanks!


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