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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

Contact Methods

  • 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. Dennis Detweiler

    Disc Brakes

    I installed a Scarebird brake kit on my 39 Plymouth. Bolted on with no problems. However, my car already had 15 inch wheels on it with radial tires. The spindles are one inch wider spacing. My rear end is stock, but already had wheel adapters. My next and final project is to install a dual master kit from from Wilwood 260-7563 which has remote reservoirs, 1 inch bore and line connections on the bottom of the master. I'm looking at Scarebird master adapter which looks like I'll be able to drill and mount to the original master mount. This master adapter is made to mount the Wilwood master. I should be able to keep the original brake pedal.
  2. Dennis Detweiler

    Change a 39 Ply Business Coupe (P8) to a floor shift

    I bought a boot for my 39 from Bernbaum.
  3. Dennis Detweiler

    Change a 39 Ply Business Coupe (P8) to a floor shift

    I already did this to my 39 because of a worn cable end and not enough left to make it adjustable to shift into 1st and reverse. You have the parts correct. All that's needed is the top shifter and the proper plates. You got it. I've been debating whether to remove the column shifter or just leave it intact and fix it into the reverse/2nd gear position. I don't know what option it could be used for?
  4. Dennis Detweiler

    suggested master cylinder conversion 1939

    I've been reading several previous posts concerning brands of adapters, brand and model M/C's, installation and function reviews. I have a Scarebird front disc brake conversion on my 39 Plymouth. It uses Chevy S-10 calipers. Scarebird makes a universal M/C adapter which looks like it can be positioned and drilled out to mount in place of my original M/C. Scarebird recommends using a Wilwood 260-7563 M/C kit which has a 1 inch bore which may be a Corvette M/C, but I have to look into it a little more? The Wilwood M/C kit includes the remote fillers. Summit and a few others carry this same kit. So, my next question; has anyone used the Scarebird adapter along with the Wilwood 260-7563 M/C kit on a 39 or another year that had the identical frame and floor pedal setup? This M/C has ports on the bottom.
  5. Dennis Detweiler

    Trunk Weatherstripping

    It's been a toss-up for mounting the weatherstripping on the trunk lid vs body channel. I couldn't find a logical position with this weatherstripping design to mount it on the lid. However, it did pinch into the body channel nicely. I used weatherstipping adhesive on the outside edge of the channel to keep water from getting under the stripping and to hold it into the channel. The lid closes snuggly.
  6. Dennis Detweiler

    suggested master cylinder conversion 1939

    After digging around on the internet the only master cylinder conversion kit I can find for a 39 is ECI kit #EC441 which includes the master cylinder for $295.00.
  7. Dennis Detweiler

    suggested master cylinder conversion 1939

    I already installed a front disc conversion on my 39 P-8. Now considering a dual master to compliment it and get better brake response. I checked ECI, but having trouble using the site. does anyone have a suggestion?
  8. Dennis Detweiler

    Single Master To Dual Master

    I know it is safer to install a dual master conversion in my 39, but will a dual upgrade also have a more solid feel and pedal travel? I already have a front disc conversion in it. The rear axle and brakes are later model between a 1946 - 56 year. It currently has a new original master cylinder and rear cylinders and bled the whole system out with a quart of brake fluid.
  9. Dennis Detweiler

    Oil Filter Kit?

    That's all I did. It just takes the place of the optional canister filter. I used 3/16 brake lines. I had to purchase a plug socket to get the square socket plugs out of the block. They were installed tightly and an open end wrench was about to strip the sides off of the square ended plug. Also, the socket allowed me to put an extension on it and give me more room to turn it.
  10. Dennis Detweiler

    Very rough idle

    I had a similar problem with my rebuilt b&b carb. I messed with it for several days plus adjusted the float lower. No results. I replaced it with a rebuilt Stromberg and solved it.
  11. Dennis Detweiler

    Trunk Weatherstripping

    The particular weatherstripping design that I have in the pictures above doesn't seem to conform to any way to lay it into the lid and be effective. However, the best way seems to work into the body channel as in picture #2 (second from the top). It tucks nicely into the channel and leaves an indentation all the way around the channel for the lip of the lid to fit into. If I apply some adhesive to the outer side of the body channel, it should keep water from getting under the weatherstripping. After spending a few hours pouring over pictures of trunks on 30's model Plymouths, I've seen the weatherstipping applied to the lid or to the channel. Most late model cars have it applied to the trunk body. I'm thinking 1930's reproductions came in either placement depending on the design of the weatherstriping? The channel seems like the only effective option with this design. I got it from Bernbaum and it's supposed to be for this trunk? It looks good in the body channel and is the right thickness when the lid is down. I'll post a picture after I install it next week.
  12. Dennis Detweiler

    Fuel Guage Calibration 39 Plymouth

    I shortened the float arm to accommodate a 6 1/4 depth (original tank is 7 1/4 deep) fuel tank which now gives the sender full travel. I calibrated the original fuel guage and a NOS guage with the same results. For some reason, I can only calibrate the guage to register 3/4 tank. So I set it to read 3/4 full on a full tank which makes it accurate on empty. I put this in the "makes no sense file."
  13. Dennis Detweiler

    Fuel Guage Calibration 39 Plymouth

    I'll give you a call tomorrow. It's too late in the evening now. Since the new tank is 1 inch shallower than the orginal, the non-adjustable float arm can't travel it's full distance which means I can calibrate the guage to show empty and 3/4 full or full and 1/4 from empty. I already cut the float arm to allow it to make full range empty to full. I will recalibrate it tomorrow. I think this will solve the problem. The old tank was rusted out on the bottom in a few places. It looked like someone had repaired it with some kind of goop at some point in time. There used to be a few places around here that reconditioned and repaired gas tanks and radiators, but they aren't in business anymore. This is the generation of "throw it out and get a new one." I bought a poly tank for the 39.
  14. Dennis Detweiler

    Fuel Guage Calibration 39 Plymouth

    Hi Rich, Yes, I have the manual and followed it. One reason I'm having problems, the original tank is 7 1/4 deep and the new one is 6 1/4. The sending unit doesn't have an adjustable float arm. So, I'm having to cut it down and reinstalling the float. More tomorrow.
  15. Dennis Detweiler

    Fuel Guage Calibration 39 Plymouth

    I just came inside to check the forum. I ran a ground wire from the sender to the panel fuse block ground and got the same results. So, it's not a ground issue. I'm going to pull the original fuel guage which I calibrated earlier and I'll calibrate the other one (NOS) which I also cleaned up all 4 contacts and wire terminals. I pulled the new correct 39 two wire sender out of the tank again, mounted it on my cardboard box to simulate the tank depth and have it ready to set at empty and full with the float arm to calibrate the guage which I'll set on the front seat and connect to the wires under the dash. I'll make sure the sender and guage are grounded. Then, I'll reply back with results again. The final electrical process to completing this rewire job and it has to be the biggest pain in the @$$!

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