To tell the long story short: we`ve tried to do something with the lag on low RPM.
Price to pay: no aircon at all + some $.
Stuff needed: Mercedes inline-4 supercharger, bigger injectors, 2 hands.






Now working with the automatic switch.
.

nice to see how this turns out, interesting project there

you must be loaded....lol

nice work lover

Wow this looks really cool . It must be very difficult to install all parts and make them work together.

How is the compressor connected to the intake side?

Do you have a picture that shows the complete installation?

need to ask, how much clearance do you have between the charger and the Rad??

also, what turbo are you using?

and last question, how did you route the pipe work?

Nice one. From those pics it looks really neatly done. looks oem. Keep us informed!

The smallest clearance is about 20mm
Here you can see how close it is


Turbo is a noname hybrid


Supercharger


Pipework


Finally decided with the switch


We use the easyest scheme, it works like this one

is already finished???

look mentel i want one now

Fantastic!!

thanks for the pipe info mate!

i may drop you a pm with a few of my own questions!
i really want to see performance figure's!

thanks (looks brilliant by the way!)

i might be being dumb hear but the picture shows 4 inlets doesn't the 20v engine have 5? .

It's just a concept sketch, don't think he hacked off the other cylinder

I think the sketch is for a volkswagen audi 20v, because of the 3 inlet valves per cilinder.

4AGE 20v is a toyota engine.

It's just a sketch to give you the rough idea of the system layout guys


Looks superb, looking forward to the results from the rollers.
What was the goal for the build, a wide spread of power or an improved bottom end?

Maybe a stupid question, but does the supercharger having to pull air throught the turbo have any side effects? Would it increase the spool up speed of the turbo maybe? Or make the supercharger slightly less efficient as it's effectively an obstruction to the airflow?

Great project by the way, wish I had the time, money and skills to do something decent!

I'm not sure the diagram is 100% correct, you'd wan't to run the supercharger in parallel with the turbo with the one way valve on the supercharger exit.

The diagram is correct this is simply one way of twincharging an engine using the supercharger to spool the turbo then allowing freeflow when the valve opens.

I said this is one way of doing it not the best, worst, right, wrong encase someone feels to knit pick.

Must add really looking forward to see how this turns out when finished.

Steve

Yet again, for the thrid thread now there are two ways to twin charge. Supercharger sucking through the turbocharger or Supercharger blowing into the turbocharger.

Lancia S4 Delta



VW TSI

Do we have any power figures for this setup yet?

I am itching for power to see of it's worth doing!!

Great project. I'm curious to know how you are going to switch the supercharger in/out to give you the power you want and still make it drivable.

This looks very interesting

Looks to be a pressure switch using wastegate preload, or for greater control a boost controller e.g. bypass supercharger at 1bar.

so if you set this up with a boost controller you could programme it to flick over at one bar to the tubro?

am i right or am i in my own world with this??

You could, or could leave it later, but it would depend on what pressure the actuator is rated to to open / close

ok, best thing i think i could do is just wack it together and bring it to flea for his magic touch!

or and put a boost contoller on also!

surley you would want the charger to go upto 3,500rpm then turbo to take over?

Well it all depends on the efficency of the supercharger and when the turbo would be creating enough boost pressure to make the switch over desirable. You can't just say 3,500 rpm you will need to compare the maps of both the chargers to see. I think the pressure switch is the right way to go about it.

If you want to get the most out of this set up you will need to match each one charger with the other

Steve