RV head vs. PB head

[rutti]

Sorry to bring up this old thread. The german website link it doesn't compare the size of the in/exh valves (40/33mm?), so I am unsure if the valves size are same on PB vs our RV heads. I would like to fit a PB ecu on my RV to see if it can make more power as I have 4-1 extractors and *errhmmm* de-cat (for now ), if valve sizes are same, looks liek i already have a PB ready engine??

[Bora Sport]

I may be corrected here. I have always believed that the main reason for the loss of power with the RV engine was the strangulatiing exhaust manifold and down pipe. If you compare the RV setup to that off a european engine or even the 2 litre exhaust and down pipe you will see a massive difference in size. Having said all that it may be that because the RV was essentially the engine that VW used for the tougher emission laws in California that the ECU is programmed to give slightly less performance.

[rutti]

Thanks for confirmation.