"D15B1 is the worst"

Rep it! RDR, you're straight spoiled with that 92 hp! I gotta chill with the semis when I go over the Grapevine on I-5. The MPFI no doubt is your best bet for some power, otherwise, like everyone's saying, just put the money you would spend on "feel good" performance parts into savings for a new ride.

And can I ask the reason why you cut a figure eight hole in your upper timing belt cover?

 

yes i know what the mpfi looks like but im not putting money into my car but i would if i had a newer one i would prolly put the skunk2 manifold btw and i took the timing belt cover off cuz the figure 8 thing looked funny and thanks mad 7 hey can you upload a pic of a standard 1991 hatchback with the d15b1 i cannot seem to find some pics is that like a CX or something lol chill with the semis

 

You should keep your belt cover on..

 

nah ill keep it off it looks so much better we painted it blue it looks siick and why a dude in my older posts said he has had his off for over a year no probs and most of the b series engines have em off so...

 

The engine looks the same...

I believe the difference between the d15b1 and d15b2 is that the b1 has a different restrictor plate giving less airflow. The cam is also more aggressive in the b2. Last thing is the ECU has better fuel maps on the b2 from what I have read.

 

thats sweet thanks man so i guess the b2 isnt as sh*tty as everyone says and the valve covers are usually an army-ish green right from what i have seen. they are very familair and btw what is an injector plate? and i understand the dpfi more now inside the intake manifold are 2 injectors and there are 1 injector per 2 intake manifold holes 2-4 with the mpfi there are 1 per hole 4-4 am i right?

 

dpfi is 2 fuel injectors, same process as a carb. what ever cyl opens it sucks air and fuel in. the dpfi is 1 injector for idle and 1 injector for throttle.

mpfi has a injector at each cyl, when the ecu gets the signal that the valve is open it opens that certain injector to spray fuel into that specific cyl.

 

oh ok i see