Best place to tap boost gauge?

[90Tsi AWD]

I did a search and it seems like opinions differ when it comes to where to tap for the boost gauge. I just bought a mechanical AutoMeter gauge and want the most reliable source to hook it up to. Some people say to the throttle body and some to the fuel pressure solenoid, what do u guys think? also if anybody has a good write up of both that would be greatly appreciated. thanks

 

[tranman91]

Most people are going to say the fuel pressure solenoid as it will be more accurate. That's where I did mine.

http://vfaq.com/mods/wayback/BradBauer/gauges/boost.html

 

[90Tsi AWD]

cool thanks alot for the fast reply

 

[danyz250f]

i use the fuel pressure sylinoid. there is a plastic conector there that just pulls of and you can t in a vacume line there so you dont have to cut anything. http://www.vfaq.com/index-main.html

 

[MrBoxx]

Fuel pressure solenoid, for sure. And don't use the tiny white nylon tube that comes with many boost gauges. Get an adapter for 1/8" rubber hose. It won't kink or crack and will be easier to work with.

 

[steve]

Most people are going to say the fuel pressure solenoid as it will be more accurate.

It's not that it more accurate, just easier since you just remove one plastic coupler and inseart a tee.

Steve

 

[DGajre777]

Tech Guide for fuel pressure solenoid tap - http://www.dsmtuners.com/forums/showthread.php?t=205099

 

[rjclagett]

I tapped mine in to the FPS like everyone else says, and mine doesnt show any vacumn readings. Anybody know what might cause this? Boost side works fine but not measuring any vacumn?

 

[bird man]

if you go on the greddy site and look at they're profec b spec 2 manual it clearly states that for some reason on an eclipse and a supra you need to tap the boost vac. line between the FPS and the throttle body.

 

[steve]

The FPS hose doesn't run to the throttle body. It runs from the intake manifold to the FPS to the FPR. We tap into it between the IM and FPS. It sees manifold pressure, both vacuum and boost.

Steve