| Author | Topic |
|---|
Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
|
|
Re: SERIES Twincharging...
|
Sun, 21 August 2005 15:33
 
|
 |
| AW11 no Jitsu wrote on Sun, 21 August 2005 03:01 |
in issue 90 of Zoom there is a 13bt in a 323 that is running a 1g supercharger. The supercharger is used below 5000rpm to improve the response until the turbo kicks in.
|
| AW11 no Jitsu wrote on Sun, 21 August 2005 04:07 |
When the turbo comes up to speed, a solenoid-controled TB is opened and the electromagnetic clutch on the SC is disengaged.
|
| styler wrote on Sun, 21 August 2005 12:14 |
how about checking out some oem setups like the nissan march super turbo and lancia,
'nissan march on autospeed'
At low-to-mid revs, the 930cc four is boosted by a positive displacement blower (see Supercharger Steal - Part One for details). At higher revs, however, a relatively large turbo kicks in to give great top-end performance. Note that the transitional stage is very smooth thanks to a relatively simple supercharger/turbo control system. At low rpm the turbo blows through the supercharger which is effectively free-wheeling. Then, at high rpm, the supercharger is disengaged by an electro-magnetic clutch and the turbo feeds the engine via a supercharger bypass passage. Airflow through this passage is controlled by a differential pressure valve which begins to open as the turbocharger nears operating speed
http://www.nissanperformancemag.com/august03/ask_s arah/
Known as twinchargers, the Lancia rally cars employed both a turbo and a supercharger. HKS even offered an upgrade for the Toyota MR2 with a supercharger-into-turbo kit.
|
| brett_celicacoupe wrote on Sun, 21 August 2005 14:54 |
here is my quick autocad design
it should give smooth trasition
|
| feral4mr2 wrote on Sun, 21 August 2005 19:59 |
s/c blowing through the turbo is exactly how i would do it if i ever decide to try a twin charge set-up.
|
| toof wrote on Sun, 21 August 2005 20:15 |
feral: exactly..
why not use the the charger to blow through the compressor housing of the turbo. yes it will offer some restriction however the plus is that you will be aiding the spooling of the turbo buy forcing air through both sides.then use a electronic controllable butterfly valve in a second pipe that bypasses the SC. as the turbo is at a point where it can/is making boost then open the electronic throttle (SC bypass) and turn off the charger.
my tuner and i considered this. the upwards transition is pretty straight forward to tune. its the downwards transition and partial throttle higher revs ie a sweepiong corner etc that will be difficult to tune.
|
| toof wrote on Sun, 21 August 2005 21:34 |
| oldcorollas wrote on Sun, 21 August 2005 20:36 |
| toof wrote on Sun, 21 August 2005 20:15 |
feral: exactly..
why not use the the charger to blow through the compressor housing of the turbo. yes it will offer some restriction however the plus is that you will be aiding the spooling of the turbo buy forcing air through both sides.then use a electronic controllable butterfly valve in a second pipe that bypasses the SC. as the turbo is at a point where it can/is making boost then open the electronic throttle (SC bypass) and turn off the charger.
my tuner and i considered this. the upwards transition is pretty straight forward to tune. its the downwards transition and partial throttle higher revs ie a sweepiong corner etc that will be difficult to tune.
|
but it has already been done.. that 13B for example.. anyway.. this is not the thread to discuss those ideas  sorry.. make your own thread 
|
internal combustion has been done before and kinda works ok too
if you were going for the sequential the SC blowing through the turbo i imagine would be preferable to the turbo blowing through the SC. at least i would imagine it is.. since you can regain the SC's parasitic losses when the turbo is producing boost.
|
[Updated on: Sun, 21 August 2005 15:35]
|
|
|
| | Subject | Poster | Date |
|---|
 |
SERIES Twincharging... (no longer taking the piss :P )
|
oldcorollas | Sun, 21 August 2005 11:41 |
|
Re: SERIES Twincharging...
|
old_mr2 | Sun, 21 August 2005 15:11 |
|
Re: SERIES Twincharging...
|
oldcorollas | Sun, 21 August 2005 15:33 |
|
Re: SERIES Twincharging...
|
oldcorollas | Tue, 23 August 2005 13:50 |
|
Re: SERIES Twincharging...
|
feral4mr2 | Tue, 23 August 2005 14:00 |
|
Re: SERIES Twincharging...
|
oldcorollas | Tue, 23 August 2005 14:14 |
|
Re: SERIES Twincharging...
|
oldcorollas | Tue, 23 August 2005 14:16 |
|
Re: SERIES Twincharging...
|
feral4mr2 | Tue, 23 August 2005 15:05 |
|
Re: SERIES Twincharging...
|
Ben Wilson | Tue, 23 August 2005 22:57 |
|
Re: SERIES Twincharging...
|
oldcorollas | Wed, 24 August 2005 00:07 |
|
Re: SERIES Twincharging... (no longer taking the piss :P )
|
Ben Wilson | Wed, 24 August 2005 00:41 |
|
Re: SERIES Twincharging... (no longer taking the piss :P )
|
shinybluesteel | Wed, 24 August 2005 03:01 |
|
Re: SERIES Twincharging... (no longer taking the piss :P )
|
berad | Fri, 26 August 2005 01:00 |
