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#1
07-09-2013, 08:39 PM
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My A/C vents don't blow hard
I'm staring to drive my 69 again. It runs and drives good but its 98 degrees here in Alabama. My a/c works but it doesn't blow very hard out of the vents. It's not nearly enough to get the car comfortable. Would that be a squirrel cage issue?? I scanned back 2 years here and couldn't find a thread on it.
Thanks
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#2
07-09-2013, 09:12 PM
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Sounds like it may be the high speed relay on the firewall.
Yes it is hot down here in AL
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#3
07-10-2013, 10:15 AM
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Jimmy, these cars never had much of a blower compared to
a late model car. High speed on my car has always felt like low on a modern car ever since I bought mine in 1972. If you have all your speeds then there isn't anything you can do to make it blow harder. I agree the blower sucks on these cars. |
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#4
07-10-2013, 07:16 PM
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Well thanks. I have all my speeds and its full of freon. I guess I just have to learn to live with it.
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#5
07-22-2013, 12:57 PM
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check your evaporator and heater for blockage from leaves etc. Common problem
__________________
My Break Away Squad 1969 Fbird (base OHC, 350, 400HO & Sprint Cvt’s - 400HO & TA ht’s) 1969 Custom S 2dr ht 1969 LeMans (2dr & 4dr ht & Cvt) 1969 LeMans Safari wagon 1969 GTO (2 Cvt, 2 ht & Judge ht) 1969 Cat (3 Cvt’s & a 2dr ht) 1969 Ventura wagon 2 seat 1969 Exec 4dr post 1969 2 Bonnie Cvt's & 2 wagons 1969 Bonnie Brougham (4dr ht & Cvt) 1969 Grand Prix 2 SJ’s 1969 2+2 2dr ht (Canadian) |
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#6
07-22-2013, 02:10 PM
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Some discussion here, but no real resolution yet:
http://forums.maxperformanceinc.com/...41#post4976441 K
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'63 LeMans Convertible '63 Grand Prix '65 GTO - original, unrestored, Dad was original owner, 5000 original mile Royal Pontiac factory racer '74 Chevelle - original owner, 9.56 @ 139 mph besthttp://www.superchevy.com/features/s...hevy-chevelle/ My Pontiac Story: http://forums.maxperformanceinc.com/...d.php?t=560524 "Intro from an old Assembly Plant Guy":http://67-72chevytrucks.com/vboard/s...d.php?t=342926 |
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#7
07-22-2013, 02:51 PM
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Make sure your ductwork joints are sealed so you aren't losing any air under the dash. I have also read on here of a fan with a different style cage that moves more air.
Finally, if your insulation on the firewall is not the best, and isn't sealing all the heat from the engine compartment, that might be another situation to look at. |
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#8
07-23-2013, 12:21 PM
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If the evaporator core is not dirty and no leaks in the ducts then it is from the large size ducts that have a lot of air volumn that causes lower blower motor air pressure.
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1971 Pontiac GT-37 Car is a junk yard dog and maybe one day will be restored.  
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#9
07-24-2013, 03:43 PM
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Just thinking aloud here. I wonder if artificially reducing the duct volume/size would bump up the pressure?
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"If you can’t fly then run, if you can’t run then walk, if you can’t walk then crawl, but whatever you do you have to keep moving forward." |
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