We took a 392 mile jaunt in the GT today, and I captured some pix while the wife was driving, and while I was driving. One is of the new AC unit temperature which, when set on low fan speed, would pull down to 29F degrees. Outside temps were 84-87 for most of the drive. The other is of the dash, with wife tooling along at an indicated 70 MPH. Then is a pic of the speedo and GPS, at an indicated 76 MPH, at an actual 72, per the GPS. This is a lot closer than most OEM Hawk speedos I've seen, but I like to get them closer. Since the odometer is only 2-3 percent off, I will leave the pinion gearing alone, and simply calibrate the speedo head. Just one more thing in the round-2-it file.
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Joe, you better take a jacket with you when you turn on the A/C. Brrrrrrrrrrrr.Howard - Los Angeles chapter SDC
'53 Commander Starliner (Finally running and driving, but still in process)
'56 Golden Hawk (3 speed/overdrive, Power steering - Running, but not yet driving)
'58 Packard Hawk. A partially restored car that was not completely assembled.
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Originally posted by alaipairod View PostJoe.........What freon are you running in your a/c..........??
I use the OEM condenser, and have always preferred them over the more modern, smaller ones. It held 39-40 degrees, with the fan on high speed. On high, the air reaches all the way to the back seat, with the two center vents blowing straight back and between the GT's bucket seats. Yep, pretty pleased with the current set up.
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Joe, I love the style of the under dash unit you installed. I wish I had seen that before I installed the Vintage Air Mark IV unit in my Hawk. The styling of your looks much more period correct.Wayne
"Trying to shed my CASO ways"
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Originally posted by wdills View PostJoe, I love the style of the under dash unit you installed. I wish I had seen that before I installed the Vintage Air Mark IV unit in my Hawk. The styling of your looks much more period correct.
The 56J has had an auxiliary heater under the driver's seat, and it works great. So no need for a heater in the AC unit. Since the late 1990s, I have had a 1966 Mopar evaporator in the 56J. It looks identical to 66 Stude, but different script on bottom. However, the fan has became way too weak, over the decades. How well does the Mark IV cool? I could not find any specs on it, so went ahead and took a chance.
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70 MPH at only 2200 RPM? That's great! What transmission and rear axle ratio is fitted?RadioRoy, specializing in AM/FM conversions with auxiliary inputs for iPod/satellite/CD player. In the old car radio business since 1985.
10G-C1 - 51 Champion starlight coupe
4H-K5 - 53 Commander starliner hardtop
5H-D5 - 54 Commander Conestoga wagon
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Originally posted by RadioRoy View Post70 MPH at only 2200 RPM? That's great! What transmission and rear axle ratio is fitted?Last edited by JoeHall; 05-21-2018, 07:21 AM.
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My Mark IV does a decent job, but it never gets the interior cold on a hot day. It makes it bearable on a 95 degree day but that is about all I can say. It will freeze your arm or leg or whatever the vent is pointing at, but your other side is still too warm. This may just be a limitation of any under dash unit. Everything else I have ever owned either had no AC or AC with vents both in the center and the outside edges of the dash.Wayne
"Trying to shed my CASO ways"
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Originally posted by JoeHall View PostDespite the indicated 70 MPH, its actually about 66 MPH at 2200 RPM (speedo error). But as for your question, if you look closely at the one pic, you will see a clue in the shift quadrant (P-R-N-D-L), which is from a mid-60s Impala. This Stude has a 700R transmission, with 3.54 rear gears. I have tried many rear end ratios with overdrive transmissions, and have found 3.54 to be the best match nowadays, for V8 Studes.Bill L.
1962 GT Hawk
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Originally posted by 56GH View PostWhich brings up a question for me. Ideally, what should the rpm be for a 1962 GT with a 289, Flightomatic and 3.31 rear end be at, say, 70 mph? It seems to me like my engine is "screaming" at 70 mph and I don't know the accuracy of the replacement electronic tach sender from S-I.
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Thanks, Joe. I'm running 215 radials and my speedometer reads a 2-3 mph error anyway. The various radar traffic devices that I go by once in a while indicate I'm going 30 mph when I'm showing about 28 mph on my speedo.Bill L.
1962 GT Hawk
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