wws944

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About wws944

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    Senior Member
  • Birthday 11/23/1956

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  • Gender:
    Male
  • Location:
    NorCal
  • Interests:
    Electric Vehicles

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  1. You should try the 15-speaker Premium sound system in a Tesla some day. Zero drive train noise, so only tire noise remains. Full internet connectivity for streaming audio via tunein, slacker, spotify, FM radio - both analog and digital, and bluetooth from your phone. Fantastic road car - and I am a bit of a road trip buff. And of course I have to note that in the Model S and X, the volume control "goes to 11" - instead of 10. As for my Reatta, especially since it is a convertible and is usually driven "top less", I mainly ask for clean sound and a lack of problems at reasonable volumes. As we all know, the foam surrounds on the speaker drivers of the era were very prone to disintegration over time. And the capacitors in the amplifier section of the CDM modules are also a problem. I've also done a lot of experimentation with the CDM modules and head units (have a collection of about a dozen each) in terms of adapting the CD player harness for AUX IN, and using low level outputs from the Bose modules to drive external amps. Beautiful living room setup. I'm sure you enjoy it! Mine isn't quite as pretty. But it is interesting in its own right. (Modern sources feeding vintage McIntosh amps and Altec Lansing VOTT.)
  2. There have been a number of efforts to re-vitalise AM broadcasting over the past few decades. In the 1980s, some radio frequencies just above the traditional AM broadcasting band were freed up. (E.g., the ancient “calling all cars” police band and also an obsolete LORAN system.). So the AM broadcasting band was expanded a bit to include the so-called “X band” - which refers to frequencies between 1630 and 1710. A number of broadcasting stations were, and are, licensed there. Advantages included less interference from other stations on the same or adjacent frequencies. Also a number of the X band stations broadcast in C-QUAM AM stereo. (Though AM stereo isn’t limited to just X banders.) There was also an effort to raise the technical standards of the broadcasters and radio manufacturers called AMAX. GM/Delco actually advertised at the time (early 1990s) that that the AM side of some of their radios were AMAX compliant. But by the mid-1990s both AM stereo and AMAX began to fade away. Nonetheless, there are still like around 100 stations around the U.S. broadcasting AM stereo. Locally to me, in the San Francisco Bay area, I can only receive a single AM stereo station - KDIA - which is also an X bander on 1640 kHz. It lights up the ‘stereo’ light in my Reatta just fine during the day. However their night time transmitter does not. Unfortunately KDIA is a religious broadcaster - so their programming is of no interest to me. Just a ‘test signal’. AM stereo can sound really good though. A number of AM stereo broadcasters do their internet streams via an AM stereo monitoring receiver - rather than simply streaming the input from a tap to their transmitters. Of note, WXYG in Minnesota and WION in Michigan are two examples with pretty decent rock music formats. (Especially WXYG.). If I lived locally to one of them, I’d certainly be mildly interested in radios that supported AM stereo. As it is, I can stream them via the tunein app on my phone, and even natively in the case of my Tesla’s infotainment system. Of interest to radio buffs, but probably few others...
  3. True. The Riv had a Bose option - which is bass/treble. So the CRT controller somehow knows how to interrogate the CDM module to discover which flavor it is. Didn't read that the OP has a '89 Reatta. If it were a '90 or '91 head unit version, the middle three sliders don't do anything when a bass/treble CDM module is used.
  4. That is a function of the CRT setup acting as the 'head unit' for the CDM module. It is only programmed to go up to 1620 kHz. From 1990-onwards, the head units are programmed to command the (1990-onwards) CDM modules to tune higher.
  5. Yes - our engines came with a CS-144 alternator. There are a number of shops that offer CS-144 upgrades, if needed. Be interesting to know if the later AD244 would fit. It is trivial to swap in a Bose CDM module - preferably from 1990 or newer. I know an '89 module will work, but AM tuning on the high end will be limited to 1620 kHz. Best would be a Bose CDM from a '94 or '95 Cadillac. Note that the Bose CDM module is bass/treble - not 5-band EQ. So the middle three EQ sliders on your head unit won't work. The low-level outputs on the Bose CDM are the same four pairs of wires that the speakers use in the amplified versions.
  6. Padgett - there seems to be a fairly wide range of compatibility between the CDM modules. I've swapped around ones dated from 1989 to about 1995 (Cadillac versions). The only 'weird' one I've found was a pull from an early '90s Pontiac Bonneville. It's CDM and associated head unit really needed to be paired together to tune correctly. I've got about a dozen various Delco head units from the era. There are three basic flavors of the CDM modules: The 'bass/treble' version, the '5-band EQ' version, and the Bose version. Both the regular bass/treble and the 5-band version have built-in amplifiers. The Bose version, also bass/treble, does not have built-in amps. The 5-band and Bose versions support CQUAM AM Stereo, the bass/treble version does not. From 1990 onwards, AM tuning goes up to 1710 kHz instead of 1620. And at least the '93 or '94 and '95 Caddy Bose units are spec'ed to the AMAX (higher performance AM) level. Comparing the guts of the different years, you'll see increasing integration over the years. The '89 module that I have includes several 'daughter' boards. By the time you get to '95, there are no daughter boards and many fewer components on the main board. The last year Buick used CDM radios was in '94, and Cadillac in '95. I think there may have been later uses in other GM vehicles. I have not played with the CRT setup at all. But my guess is that any of the CDM modules, perhaps excluding that Bonneville version, would work in your '88. Might only tune AM up to 1620 kHz though. I have a very rare '89 Cadillac Bose CD head unit, and it only tunes up to 1620 - regardless of which CDM module is in it. I also have a '91 version of the Cadillac CD head unit (they were only made from '89 to '91) and it tunes all the way to 1710.
  7. It was a great time. All the cars were in outstanding condition. (My car is the white one at 1:00 in the video.)
  8. CHM has an early Google autonomous 'pod' car on display. (Google HQ is just a few blocks away from the CHM, so I guess it was an easy donation.) Unfortunately I don't think the Reatta really falls into their area of expertise.
  9. wws944

    Speak(er) Up

    Ronnie - the rear speakers in the ‘90 and ‘91 coupes have 6x9s. But I think the earlier cars are 6.5” round.
  10. Perhaps you could find a shop that would "wrap" the moldings to the color you want. If at some point in the future you get tired of it, and want to return it back to original, just peel the wrap. I go back and forth on whether body matched or black is best. My Reatta is white with white moldings. I really like it that way. But with other color schemes I could definitely go either way. On a 17K mile car, I would keep it as original as possible.
  11. wws944

    Speak(er) Up

    Neat discovery of the hidden 'loudness' and DNR functions! Kevin - have you found any 4x10s that stand out from the rest? I replaced one of mine some years ago with a NOS "parts number matching" Delco. But now the other side is getting buzzy. I should have bought two at the time...
  12. 1.) Follow this forum more than I have the past couple of years, 2.) Take the Reatta to a few more local car shows and of course, the Blackhawk Cars and Coffee. (I typically go with forum member kitskaboodle who some times takes his Reatta too.) Also need to sell my Suburban and 944 (sigh...).
  13. I almost hesitate to mention it, but another possibility might be to go ‘backwards’ to an ‘86-87 FWD 3.8 block. I suspect it would be compatible with Grand National parts. Note that the only difference between ‘86 and ‘87 was the addition of roller lifters in the latter.
  14. Found it: http://minimopar.knizefamily.net/oilfilters/index.html
  15. Many years ago, in the early days of the web, a fellow decided he was tired of the BS surrounding oil filters. He bought one of just about every filter he could find that fit his car, cut them open, and took lots of notes and photos. Things like quantity and quality of the filter material, end cap construction, anti-drain back valve, etc. He was not impressed with quite a number of them, Frams in particular. He also reported on how various filters seemed to come from a single manufacturer. And so on. It became a bit of a sensation within car discussion forums. He actually rated AC Delco filters pretty highly. Mobil-1 filters were also excellent, along with Mahle and some others. It is interesting to note that a couple of years after he published his findings, Fram came out with their higher grade filters for those willing to pay an extra couple dollars per filter. I think his site was called 'mini-mopar' or some such. Too lazy to google it right now. Barney: I've owned a couple of cars where the recommendation is the opposite of what you do. That is, they recommended a filter change every other oil change. Nonetheless, I just do both at the same time like most people.