Hybrid turbo upgrade selection & general tuning question

Pete_89T2 · 01-07-2011, 08:34 AM

Thanks guys, you've all confirmed what I suspected, but I was hoping I was wrong! Bottom line options are to: (1) Accept the stock rebuild and call it a day (and ask BNR if they can add the wastegate port while they are at it), or (2) Pony up the time & dollars to address fuel/spark management correctly and get the stage 1 turbo upgrade. I'll post another thread later to discuss option #2 in more detail, stay tuned.

Ted - I forgot to add the fuel pump rewire in my list of mods; did that one almost 10 years ago, but still have the original pump. Thanks for the reminder - I'll need to test and verify that my handywork is still up to snuff 10 years later! Also what did you mean regarding fuel cut being inconsistent in the S5's? Some S5 turbos hit fuel cut, others don't? Seems if the ECUs were that different across a production run, they should carry different part #'s but who knows what Mazda did? FWIW, I've never hit fuel cut with mine, but I wouldn't expect to given the very close to stock setup.

01-07-2011, 08:34 AM	#10
Pete_89T2 Lifetime Rotorhead Join Date: Apr 2010 Location: Elkton, MD Posts: 874 Rep Power: 16	Thanks guys, you've all confirmed what I suspected, but I was hoping I was wrong! Bottom line options are to: (1) Accept the stock rebuild and call it a day (and ask BNR if they can add the wastegate port while they are at it), or (2) Pony up the time & dollars to address fuel/spark management correctly and get the stage 1 turbo upgrade. I'll post another thread later to discuss option #2 in more detail, stay tuned. Ted - I forgot to add the fuel pump rewire in my list of mods; did that one almost 10 years ago, but still have the original pump. Thanks for the reminder - I'll need to test and verify that my handywork is still up to snuff 10 years later! Also what did you mean regarding fuel cut being inconsistent in the S5's? Some S5 turbos hit fuel cut, others don't? Seems if the ECUs were that different across a production run, they should carry different part #'s but who knows what Mazda did? FWIW, I've never hit fuel cut with mine, but I wouldn't expect to given the very close to stock setup.