Hey guys!
i fitted in my RST :
-Stage 3 Turbocharger from TurboTechnics
-Front Mounted Intercooler
- ARP Head Bolts
- GFB Boost Controller with MAC Valve


What should i do next in question of the fuel/ecu?
At the moment i dont want a conversion to efi.. sometimes later.
I heard that a Boost lock is in the ECU, is that right?

My Plan is to take the cold start injetor with a pressure switch, that it injects at boost.

 

10psi boost cut in the silver ignition ECU, Chip needs to be changed, it's soldered into the board.

Not sure where you can get one from these days as Ahmed Bayjoo died a few years ago.

I had his chips in the 90s.

 

The only one which i can find is on Motorsport Development.

What does this boost cut actually do in the ecu?

 

You have a map sensor in the ecu controlled by a chip, which limits the boost to 10 psi then ignition cut.

Motorsport development are a reputable firm.

 

Plus it controls the wastegate and reduces boost.

According to the wiring diagram both Jetronic and ESC-II units are standalone items. There's just one signal connection from the ESC to the Jetronic, probably a signal for the injection as soon as the engine starts cranking.

Probably you could exchange the ESC-II with a modern mappable ignition/injection system that works without a CPS. Some might also be able to control a fifth injector. Using a the cold start valve instead is not a good idea.

 

easier and more reliable to get a modern efi ecu

 

Unless you have all the CVH EFI parts (head, manifold, throttle body etc.) it's not as easy as it seems to be. Plus some people want to keep their ERST as standard as possible.