yes i know i didnt search the site before asking, but ive been researching for days on every website i can find and no one else seems to have asked this question before so i figured id just ask it so i can get an answer to my question not combiming multiple questions and answers to get a posible answer. i have a 97 gsr. i bought a p28 ecu obd1. its got a skunk2 chip and program. i bought it from speedinnovations.com. costed me 206$. when i bought it i had a blox intake manifold lined up, but that fell through. im not worried about that i can get another one. im just wondering if i can use this chipped ecu for now until i buy a aftermarket manifold. i have heard that you cannot use a p28 with stock mani. somthing about the runners and butterflys and iabs and all this stuff. i just want to know if i can throw this bad boy in as is without buying a new mani right away. will i gain power due to ecu or lose power due to wrong engine ecu configuration?? is it a must to get a new mani to get full potential out of this chipped ecu? or will i be better off running my obd2 p72 until i pick one up, since i also had them tune the ecu to the blox intake. would it matter if i dont get a blox, but keep the tune the same? im a first year automotive student but dont get to performance engines next year. so i want someone that knows this stuff just to tell me so i didnt spend money on parts i cant use till i buy more parts or learn how to even configure/install them.

 

It will run the motor, and the fuel/ignition maps shouldn't be terribly far off until you hit VTEC. At that point the differences in flow characteristics between the stock manifold and the single runner manifold will be more obvious. Also the P28 won't open the secondaries in the stock manifold so the motor will pretty much fall on it's face at higher rpms.

I'd keep the stock ECU in place until you buy a single runner intake manifold.