If I got a boost controller would I need a new FPR? I dont really understand many things concerning boost so this is probably a dumb question. thanks for the help

 

easy answer NO, but if you dont have a chip, you cant/shouldnt up the boost.

 

cincy... since you are here, ifI do the diode mod instead of the chip, andI get a 4 bar FPR with it, and swap it with the stock3bar,canI take the boost higher than initially recommended in your little write up?
If yes how muchhigher?...

 

I dont know anyone that has tried it on a 225 before. Not sure how it would work. I would reserve the test mule to someone else or give it more time before you attempt it.

 

so nobody that you know with a 225 has the diode mod? or nobody tried higher boost with the 4 bar FPR?

 

no one with a 225 has tried a diode mod.

 

shouldI be the first one?.... if you get 20psi on the mk03... what do YOU think I should aim for on my stock mk04 with the 4bar FPR?... what's the max?

 

20psi will be fine, its you controlling boost that worries me. You might get a CEL (if not limp) because you just pinned your ecu to seeing 11psi and thats below requested. Thats my beef. Dont really think it can be done unless a 4.4v diode exist. That MAY work.

 

did a search, dont think they exist. You can look more for a 4.4v zener diode if you like

 

then shouldn't itbe mentioned that the diode mod is not for 225's? since there's no DIODE for us?
just a thought. It is still an awesome mod (performance/money) even thoughI won't get to do it on my beautiful car.
thanks a lot for all your feedback cincy.
<is that ur name?or that's just ur city?>