MAP sensor relocation
Thread Starter
Heel & Toe
Joined: Feb 2009
Posts: 17
Likes: 0
From: Concord NC
MAP sensor relocation
I'm going to install a fast 92mm intake on my 99 frc this weekend and it has been brought to my attention that the map sensor sits very close to the firewall and that I should relocate it... If anyone has suggestions or pics of this it would be awesome if you would share them with me! P.S. I did a search and didn't find anything on this issue.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Theres a small circular area on top of the neck of the manifold opening just behind the TB mounting flange. The area is for the F Body EGR system (C5/C6 corvettes dont have that system so the hole is closed off)
The kit comes with a blanking plug for the rear hole, a wiring harness to extend the MAP Sensor connector to the front of the intake and a mounting fitting and mount retainer for the OEM Sensor that you relocate to the front.
You need to drill a 1/4" hole into the manifold in the center of that circular area to allow the sensor to see manifold vacuum.
Thats it!
There only ONE little thing that you need to keep an eye on.
The relocation harness on some kits can be connected to the MAP sensor harness in either orientation. Make sure you match the color of the wires on the connector so thay match. If you dont, your oil pressure sensor will NOT work and you will think you have ZERO oil pressure. Ask me how I know?????
No harm done but, I did need to change my shorts when I saw ZERO pressure after I completed my heads cam Fast 90/90 mods 
Had oil pressure all along but had to play hell to prove it.
BC
The kit comes with a blanking plug for the rear hole, a wiring harness to extend the MAP Sensor connector to the front of the intake and a mounting fitting and mount retainer for the OEM Sensor that you relocate to the front.
You need to drill a 1/4" hole into the manifold in the center of that circular area to allow the sensor to see manifold vacuum.
Thats it!
There only ONE little thing that you need to keep an eye on.
The relocation harness on some kits can be connected to the MAP sensor harness in either orientation. Make sure you match the color of the wires on the connector so thay match. If you dont, your oil pressure sensor will NOT work and you will think you have ZERO oil pressure. Ask me how I know?????
No harm done but, I did need to change my shorts when I saw ZERO pressure after I completed my heads cam Fast 90/90 mods Had oil pressure all along but had to play hell to prove it.BC
Le Mans Master
Joined: Nov 2003
Posts: 8,004
Likes: 250
From: Tampa Fl
St. Jude Donor '12-'13-'14
http://forums.corvetteforum.com/c5-t...hrs-today.html
go to the end of the thread and there are pictures
go to the end of the thread and there are pictures
Racer
Joined: Feb 2008
Posts: 464
Likes: 0
From: San Antonio Tx
Le Mans Master
Joined: Nov 2003
Posts: 8,004
Likes: 250
From: Tampa Fl
St. Jude Donor '12-'13-'14
Yep that write up will work to.
For some reason, I remember the map relocation parts came with the "screw cork" for the rear of the manifold. I didnt want to drill the front hole to larger so I drilled , measured, drilled , measured, drilled measured until it fit. Once your oversized, you'll have to patch, and redrill.
For some reason, I remember the map relocation parts came with the "screw cork" for the rear of the manifold. I didnt want to drill the front hole to larger so I drilled , measured, drilled , measured, drilled measured until it fit. Once your oversized, you'll have to patch, and redrill.
Melting Slicks
Joined: Oct 2007
Posts: 2,464
Likes: 2
From: Cedarburg, WI
Yep that write up will work to.
For some reason, I remember the map relocation parts came with the "screw cork" for the rear of the manifold. I didnt want to drill the front hole to larger so I drilled , measured, drilled , measured, drilled measured until it fit. Once your oversized, you'll have to patch, and redrill.
For some reason, I remember the map relocation parts came with the "screw cork" for the rear of the manifold. I didnt want to drill the front hole to larger so I drilled , measured, drilled , measured, drilled measured until it fit. Once your oversized, you'll have to patch, and redrill.
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