How to attach MAP sensor to HSR intake?
Thread Starter
Senior Member

Joined: Feb 2009
Posts: 874
Likes: 18
From: Brisbane, Australia
Car: 1985 Pontiac TransAM
Engine: 400SBC 24x conversion
Transmission: T700r Stage2 Shiftkitted
Axle/Gears: 2.77 9 Bolt
How to attach MAP sensor to HSR intake?
Hi Guys,
Just wondering if there's a trick or missing part needed to install the MAP sensor into the HSR upper plenum?
I have a MAP sensor off an LS1 to go with the 0411PCM, and it has the orange rubber barb seal on it, but there's no way I can press it into the 1/8-27NPT threaded hole in the HSR.
How does everyone else install theirs?
I thought I can probably cut the orange seal off, and use RTV sealant or something to hold it in place and seal, but will that be good enough, or is there a better way?
The other option I thought of it to have the MAP sensor mounted and pipe it to the intake, but would that cause issues with pressure delay or something having it remotely located?
Just wondering if there's a trick or missing part needed to install the MAP sensor into the HSR upper plenum?
I have a MAP sensor off an LS1 to go with the 0411PCM, and it has the orange rubber barb seal on it, but there's no way I can press it into the 1/8-27NPT threaded hole in the HSR.
How does everyone else install theirs?
I thought I can probably cut the orange seal off, and use RTV sealant or something to hold it in place and seal, but will that be good enough, or is there a better way?
The other option I thought of it to have the MAP sensor mounted and pipe it to the intake, but would that cause issues with pressure delay or something having it remotely located?
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: How to attach MAP sensor to HSR intake?
Barb on intake, 4-6" of 1/4" or so rubber vacuum line run to the sensor mounted on firewall wiper lip lol
Thread Starter
Senior Member

Joined: Feb 2009
Posts: 874
Likes: 18
From: Brisbane, Australia
Car: 1985 Pontiac TransAM
Engine: 400SBC 24x conversion
Transmission: T700r Stage2 Shiftkitted
Axle/Gears: 2.77 9 Bolt
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: How to attach MAP sensor to HSR intake?
Yeah just remote mount the sensor and remove the rubber seal. Works fine like that and wont leak







