https://www.t-mobilepictures.com/myalbu ... 8ac316.jpg

A quick pic of my FPR. I was wondering about the pressure reference bung on the tophat. Should that be placed before or after the throttlebody? My brother says he heard its too difficult to tune with it sourcing the manifold because the range in + - pressure in the manifold is too great. Ex: -20lbs to +20lbs. But I would think that if you truly wanted your base fuel pressure to be (X)psi in relation to the what the injectors are seeing then you would bung it to the manifold. This is probably a noob question but I would like to tune this thing before I drive home- 1500mile trip. Next tues. So any help would be great.

It needs to be behind the throttle body to see vacuum. If you put it in front of the throttle plate on a forced induction application it will see positive pressure all the time. It's no harder tuning around a properly working FPR than not.

Most SRT-4's tee a line off the Throttle Body bacuum line and attach that to the regulator nipple. RedStar Motorsports shows a tee off the number 2 solenoid for vacuum and boost source.

Great. That definately confirms my thinking. It has always been hooked up before the throttle body and I couldnt' remember how I had my old integra setup so I left it as is. Thats what you run into when you buy a car already modded i guess-- i'll get it changed over today and start my tuning... I've just put in a new clutch and flywheel setup so its been in the garage for a week. But its given me time to get stuff like this sorted out... also I got the chance to port the intake manifold and powder coat parts. I'm stoaked-