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Dennis Detweiler

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About Dennis Detweiler

  • Rank
    Senior Member, have way too much spare time on my hands

Profile Information

  • Gender
  • My Project Cars
    1939 Plymouth 4dr Sedan

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  • Biography
    Play steel guitar in a band. Army 1970-72, coached club/rec/high school soccer, played in Branson.
  • Occupation
    Retired from partnership in painting and wallpapering commercial/residential business.


  • Location
    Solon, Iowa
  • Interests
    musician, old cars

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  1. I haven't gotten around to installing mine yet. I was looking at and measuring another old original 39 master cylinder that came with the car when I bought it. The Scarebird mount won't be a simple bolt-on process. I'll have to add some kind of spacer to make it line up with the brake pedal. However, I won't know how much modifying I'll have to do to it until I remove the floor board and have a good look. I don't know how much modifying it would take on a 49
  2. Looks like my 39 Plymouth when I bought it. Previous owner crimped new to old and some old had no insulation, so he taped it up. Some crimps came loose. I re-wired one wire at a time and also used an original schematic for confirmation. I bought 4 spools of 4 different guage wires, soldered and used heat shrink tubing on all connectors. I added separate relays for dim and bright lights and horn. I also added 2 fuse panels/blocks, one for "always hot" circuits and one for ignition circuits. I also added 3 braided grounds (body, frame, engine). When finished, I made a new wiring schematic showing fuse panels, wire gauges and routing. The next owner won't have a problem locating wires and connections in an upgraded system. Lights are halogen and bright. Horn is loud. Charging system is great. I used wiring harness tubing to protect all wires. It's a long tedious process, but worth it.
  3. My 39 Plymouth....after buying a nos two wire guage and getting my my original guage working, I couldn't get either guage to register more than 3/4 full or empty while showing 1/4 of a tank. That scenario is after buying the proper new sending unit. So, I set it to show 3/4 of a tank when full and on empty when it is actually empty. I tried everything to remedy the problem. I also purchased a nos 38 guage, but it requires a single wire sender. The car has all new wiring and I retraced and retested the fuel tank wiring and all is good. If anyone knows why I'm getting 3/4 accuracy, let me know.
  4. Yes, I installed a new stock single reservoir master along with the front disc conversion and new shoes and wheel cylinders on the rear. I bled the system using two methods and ran a quart of brake fluid through it. I just didn't like the feel of the pedal. I initially installed new shoes and wheel cylinders on the front also, but didn't like the feel of it either. Hopefully, the Wilwood dual master will feel more trustworthy and solid. These old cars are heavy and I want to stop. I'll be replacing the original brake lines also.
  5. I used the Scarebird disc kit. Converting to Wilwood master cylinder this Spring.
  6. Why not a duck call? Baseball cards and clothes pins for a flapping sound? Are the old Thrush glasspacks still in production?
  7. I picked up an INLAND AM transistor radio on ebay for my 39 Plymouth. Model vwx-100 (6v). It has a switchable ground on the back. It measures: 1 3/4 high X 7 wide and 4 deep. However, my original radio is currently out of the car, but looks like it has been repaired with some new capacitors, but the speaker is shot and too difficult to remove, so someone just added speaker outlet wires to it. I'll be testing it when the weather permits me to get back into the garage. I may or may not need the INLAND radio.
  8. Hi Danny, I won't be able to work on the 39 until the weather warms up. It's in my unheated detached garage. I'm in Iowa and knee deep in snow this Winter.
  9. I settled on the Scarebird mount and the Wilwood 7563 master. The original master mounts in front of the brake/clutch pedals. Hopefully, I'll be able to bolt the adapter mount to the original frame location and still line up with the brake pedal, but doubtful. If not, I'll have to make some modifications.
  10. I'd rather have too many fuses than not enough. I've seen too many cars short out and wires burn. Sometimes the whole car. A fuse block with everything on separate fuses is easier to narrow down a specific electrical problem if a fuse blows. It also keeps components like a radio from being completely destroyed. Mark, the photo of your old wires is why I gutted mine and installed all new wiring. Fire trap. After I purchased my 39, drove it home and had a good look at the wiring, I was lucky it didn't burst into flames on the way home. I also soldered all of my terminals onto the new wires. New wires, individual fuses, no crimps, no worries. all lights are bright, horn is loud, radio works good.
  11. I bought the modern 4 post electronic 6v relays on ebay.
  12. I rewired my 39 Plymouth from scratch by making a schematic first. I don't understand the 4 prong switch on your schematic? My "relay" is 4 prong, but a modern relay. #86 to horn button, #87 to horn, #85 to fuse panel, #30 to B on voltage regulator which also goes to the battery and incorporates a 20A fuse between the voltage regulator (B) and the relay terminal (30). My horn works without the ignition turned on, as does all cars. I upgraded my whole re-wire project using two fuse panels (one is hot and the other works only with the ignition), utilizing 11 fuses (separate circuits). I also used 8, 10, 12 and 14 guage wires, depending on the load required. I also used two separate relays for the headlights (high beam and low beam). The original 39 schematic only had a fuse on the light switch and a fuse on the horn.
  13. As an old and former auto body and paint repairman, it's usually advisable to use the same brand of paint and primer for proper adhesion. I'm not sure about the modern day Rustoleum products, but years ago they contained fish oil which is also a rust inhibitor, but also required a similar base for a top coat. Possibly fisheye eliminator added to the finish coat would suffice? Maybe the ingredients has changed over the decades and it won't make any difference. An up-to-date auto body repairman should know. A sealer over the primer before top coat may also be advisable. .
  14. Will a 1 inch bore dual master work well with a disc front conversion and stock drum rear?
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