MAP Vacuum Tube Diameter?
03-12-2016, 01:19 PM
#1
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Car: 1989 IROC-Z
Engine: 5.7L TPI
Transmission: 700R4
Axle/Gears: 3.27 Posi
MAP Vacuum Tube Diameter?
I'm converting my 89 Camaro from MAF to MAP, but I don't know what size tubing to get. 1/8 or 5/32?
03-15-2016, 07:27 AM
#2
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: MAP Vacuum Tube Diameter?
Yes either of those will do perfectly.
I'd suggest using the hard plastic kind with the rubber boot terminals on the ends, especially since the nipples on the intake and the sensor seem to usually be 2 different sizes, thus making it impossible to use a line that's the same size at both ends. Measure the nipples with your calipers and get the corresponding boots to go with whichever size of line you can get all those parts for.
I'd suggest using the hard plastic kind with the rubber boot terminals on the ends, especially since the nipples on the intake and the sensor seem to usually be 2 different sizes, thus making it impossible to use a line that's the same size at both ends. Measure the nipples with your calipers and get the corresponding boots to go with whichever size of line you can get all those parts for.
03-21-2016, 04:01 PM
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Car: '91 Chevy Camaro RS
Engine: 3.1L LHO V6
Transmission: Borg Warner T5
Axle/Gears: GU6 3.42 Open Diff
Re: MAP Vacuum Tube Diameter?
Mine uses a 5/32 hard emission hose.
03-27-2016, 12:00 AM
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Car: 1989 IROC-Z
Engine: 5.7L TPI
Transmission: 700R4
Axle/Gears: 3.27 Posi
Re: MAP Vacuum Tube Diameter?
Thanks for the replies! I had to do the swap because I purchased a Flash system from DyanmicEFI. I asked Bob, he said the 1/8th hard plastic is usually what GM would use, but either would work fine (as echoed above!).
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