im going to be running a stock p72 into my stock h22...i know the h22 injectors are peak and hold and are too large, so should i just run stock gsr injectors? or could i get a fuel pressure regulator and up the fuel to make the ECU work with the h22 injectors?

 

I wouldn't suggest running the P72 unless it's atleast chipped with a H22 base fuel map. I'm fairly certain the GSR injectors weren't intended to be used on a engine that requires a fuel injector resistor box so I'd think it's doubtful that it will run right if at all.

I'm running stock 345cc's with the P13 w/ my H22 swap, runs pig rich but it still runs.

 

you need it chipped with a h22 basemap on it. and you should probably get it tuned as soon as you can. you dont need to change the injectors. you dont need to drive the car with the stock p72 ecu, it will probably run very lean at wot.

 

honestly it prolly wouldn't run all that lean in closed loop with a stock h22. I mean you still have an O2 sensor to change up the part throttle maps. But under open loop conditions, it would likely run pretty lean. And if you ran GSR injectors, you would be running even leaner because the injectors are a little smaller.

But there is no reason at all to change to GSR injectors cuz that would just be dumb, potentially dangerous and a waste of money.

With said, i would not suggest driving on an unmapped p72.