where does speed density sensor connect?
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Joined: Jan 2012
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From: fort hood, tx
Car: 1988 pontiac firebird trans am gta
Engine: 383
Transmission: 700r4
where does speed density sensor connect?
Im swapping my stock 350 for a 383 and switching to speed density instead of the MAF sensor. Ive got the wiring part of this figured out but i cant seem find anything on where the vacuum line connects to the manifold. If anyone can explain this to me or has any pictures of the where the line connects i would be grateful. thanks
Joined: Dec 2004
Posts: 16,752
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: where does speed density sensor connect?
the map sensor get its vacuum signal from the plenum. if this is a older maf plenum Do not t the vacuum signal dirll and tap the plenum. The 90-92 tpi plenums had three fitting on the rh side map, fuel pressure regulator and hvac.
Joined: Dec 2004
Posts: 16,752
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: where does speed density sensor connect?
The measurement to the center of the hole in relation to the fuel pressure regulator vacuum hole is 35mm over center to center. 55mm down from the top of the plenum and 20mm bottomof the plenum to center of hole. Gm 14082470 fitting for the map sensor. 1/4 npt hole.
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