+- STD (https://www.superturbodiesel.com/std)
+-- Forum: Tuning (https://www.superturbodiesel.com/std/forumdisplay.php?fid=6)
+--- Forum: Engine (https://www.superturbodiesel.com/std/forumdisplay.php?fid=7)
+--- Thread: Supercharger Question (/showthread.php?tid=4966)
Supercharger Question - 97e300 - 10-01-2013
So I've got a couple questions regarding superchargers in our cars:
How does the supercharger help spool up the turbo?
Does the supercharger shut off after the turbo is spooled? Is it after a certain rpm, boost pressure? How is it controlled? Some kind of switching valve?
How is the setup routed? I've seen some superchargers that feed straight into the manifold.
How did you implement your setup? What works and what doesn't?
Thanks!
RE: Supercharger Question - Hario' - 10-01-2013
Each question you asked has many different answers depending on intended use, desired power characteristics, desired power goals and packaging constraints.
I suggest reading a few build threads on each variation and come to your own conclusion based on your own performance and engine characteristic goals.
H
RE: Supercharger Question - Simpler=Better - 10-01-2013
Typically the supercharger is used for instant boost and then bypassed later.
It gives a fixed linear boost rate based on engine RPM, which is why they're popular with street gas cars-they're easier to tune than turbos. For a diesel it's just fast boost
RE: Supercharger Question - 1911diesel - 10-04-2013
hummm, JUST fast boost... isnt early boost something thats sought after in a lot of builds? i mean running a supercharger with a super small pully then bypassing it in the upper rpms to let the turbo do the rest of the work. is kinda like saying its only steroids, their just going to make you way stronger in every where you are weak now, plus some... but maybe thats just the way i see it. i have been wrong before.
RE: Supercharger Question - EDH_Performance - 10-05-2013
(10-01-2013, 10:43 AM)97e300 So I've got a couple questions regarding superchargers in our cars:
How does the supercharger help spool up the turbo?
It helps the engine to burn more fuel at low rpm, meens the higher EGP to help the turbo spool
Does the supercharger shut off after the turbo is spooled? Is it after a certain rpm, boost pressure? How is it controlled? Some kind of switching valve?
On my 190D i bypassed the compressor with a butterfly valve and a wg actuator, workd good as long as i took the pressure that controlled the BFV from the intake manifold. The valve opened on 1 bar.
How is the setup routed? I've seen some superchargers that feed straight into the manifold.
On my engine the compressor was feeding directly into the manifold, not the best solutions regarsd the airtemp but it worked good.
After 1bar of boost was reached the 3" y-pipe bypassed the air around the compressor and the turbo was feeding intercooled air into the intake.
How did you implement your setup? What works and what doesn't?
I tried to take the pressure that controlled the actuator for bypass on the turbo side, but by doing this i got a high pressure spike in the intake, and then a sudden drop in pressure as the butterflyvalve opened. You could easily see it on the dyno graph!
Thanks!
