Pipedreams

Those cans are for topping up the system if it just leaked a small amount over time as it can do if not used for a while. If the system has been open to atmosphere it has to be vacumed to remove moisture and all air.

It's the opposite actually. At high rpms the compressor can't keep up with the flow demand of the engine so it won't be able to hold boost. An n/a-t 2jz would need ~5psi to reach 300hp and if that is the hp-limit of the compressor, that's the boost it can hold.

Well, with the setup you have come to I don't see the point in not running a sequential setup. You allready have implemented the necessary valves but made the exhaust side less effective by running them in series instead of parallell.

Sure it will help to some extent but when using a compressor as vacuum pump you don´t have any restriction at the end of the air pipe. If you put a restriction at the end to raise the pressure to 35psi I don´t thing you will get much suction in the second pipe.

No, I means my phone wouldn´t let me post I don´t think it will work in closed loop against pressure since the nr1 turbo will equalise pressure in the pipes if nr2 is slowing down so the valve won´t know that it should close. It will only close when the overall pressure is lowered.

It wasn´t that it was recirculated that was the problem, it was having the turbo spinning without any restriction on the compressor outlet. But with the turbine bypassed also that wouldn´t be an issue. But then the turbo won´t spool and then there is no point in venting the compressor side either. The reed is a much better option.

Do you mean bypass it back to the compressor inlet? Without any restriction it will overrev and break. And once again it comes back to turbospeed to control it

Maybe it´s just the lower back dyno foolin you With a free flowing exhaust you will build boost earlier and get a smoother powerband without a real kick in the back but you are moving faster earlier.

I bet those pwm-tables will be a real PITA to get right. The best would be closed loop vs turbospeed but that´s alot of money. But I really like that you think outside the box. Just how I like to do things myself

When you open the first wastegate to slow the first turbo down you will gain alot of energy to the second turbo which will spin faster and raise boost. Then when the second wastegate opens you get lower backpressure in in the pipe between the turbines and that will make the first turbo spin faster. So at the same boost pressure you will need different pulsewidth controlling the first wastegate depending on backpressure in the pipe between the turbos. The only way I see it possible to get any control over boost is to base it on turbo speed. And the cost of that setup for 2 turbos would easily be 1000£

I can't imagine this setup working very well with 2 similar sized turbos working with different pressure ratios over their turbines. Once you open the valve in the intake pipe the boost will fluctuate like crazy.

If it´s UK the 5pin is for the AFM and you can remove it if your on syvecs, the 4pin is a oem lambda and can be removed also. The 2 pin is probably for the oem wastegate vsv and can be removed if you don´t want to use it for wastegate solenoid thru the syvecs.

Yep, would bet on the crankpulley. If the powersteering is unloaded= you not turning the steering wheel: there is no load on the pump and the wheel will turn with the belt without problem. But under load the pulley on the crank slips since the rubber has become loose. If you remove the belt you could probably pry the beltpulley part loose from the crankpulley.