Controlling turbo boost pressure, what solution, and why?
Building my first turbo bmw E36, and I bought an engine kit that came with a S2 wastegate.
The last owner said the spring was set to 1,4 bar.
I have the VEMS V3.33 ECU, and this can control boost eletronically.
Would I have any real gains with using this?
Electronic control allows precision, requires tuning ability.
If you're asking here, you have no business tuning, let alone installing a turbo.
Two main ways.
First is your wastegate, which is set to open at a certain pressure referenced from your intake system post-turbo. The wastegate is 100% mechanical, basically just a spring-loaded valve. What spring you put in your wastegate determines at what pressure it will open and therefore your maximum boost pressure.
Second method is through a boost controller. A boost controller hooks up inbetween your intake pressure reference and your wastegate, and basically controls WHEN your wastegate sees the reference pressure. You can set your boost controller to open up at a certain pressure and therefore allow your wastegate to open up. This is how you set maximum boost with a boost controller.
It's a Holset HX35. Dont worry, the engine will handle it.
You gotta start somewhere by learning right?
I simply do not know what methods gives you the best results, but I do know the basics behind controlling the pressure.
Should I atleast get a manual boost controller, if I dont get an electrical one? Are we talking alot earlier spool compared to the mechinal one?
Am I missing something?
2 seconds in Google tells me the HX35 was designed for 5 - 6.5 litre engines and the biggest an E26 ever got was 3.2, not to mention that they are rated up to 50psi (~3.4 bar)...