The Forward Look Network
The Forward Look Network
Search | Statistics | User Listing Forums | Chat | eBay | Calendars | Albums | Skins | Language
You are logged in as a guest. ( logon | register )

Hemi Powered '56 Plymouth
Jump to page : 1 2
Now viewing page 2 [50 messages per page]
View previous thread :: View next thread
   Forward Look NON-Technical Discussions -> Members RidesMessage format
 
1960fury
Posted 2018-03-14 4:31 PM (#559888 - in reply to #480421)
Subject: Re: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 6063
500010002525
Location: northern germany
nice little bomb. have you ever measured 0-60 times?
Top of the page Bottom of the page
Powerflite
Posted 2018-03-14 5:35 PM (#559893 - in reply to #480421)
Subject: RE: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 5655
50005001002525
Location: So. California
Thanks Sid. No, I haven't taken it to the track at all. The motor has never been rebuilt so it still has the original '55 Imperial cam, rings & 8.5:1 pistons in it. Originally it was rated at 250hp, now with the better intake, exhaust and carburetor, it might be around 270hp, but it has also been running a LONG time. Nevertheless, it will easily break the tires loose from a standstill if you nail it, so it is pretty decent, but not as impressive as other cars that were built for power. I mainly use it to tow my camping trailer around and take it on family outings. The low 1st gear of the 700R4 trans is really nice with a trailer behind you in the mountains, but the 11" disc brakes are a little small for the extra weight. I may end up converting the rear to disc and/or going to 12" rotors in the front to handle it better when fully loaded.



(Teardrop Camping.jpg)



(SavoyTeardrop.jpg)



Attachments
----------------
Attachments Teardrop Camping.jpg (296KB - 107 downloads)
Attachments SavoyTeardrop.jpg (240KB - 100 downloads)
Top of the page Bottom of the page
Mopar1
Posted 2018-03-15 11:07 AM (#559936 - in reply to #559868)
Subject: Re: Hemi Powered '56 Plymouth



Expert

Posts: 2727
200050010010025
Location: N.W. Fla.
Powerflite - 2018-03-14 10:00 AM

Hello George, the decal came from Ebay. They have an earlier version of it too for '53-'55.

https://www.ebay.com/itm/1956-DODGE-CHRYSLER-PLYMOUTH-DESOTO-IMPERIA...

The Hot Heads won't take the OEM crossover only for the 392. For the 331 or 354, there shouldn't be an issue.
Actually referring to the "331 hemi Head" decal, obviously modeled on the 426 decal.
Top of the page Bottom of the page
56D500boy
Posted 2018-03-15 11:36 AM (#559938 - in reply to #559936)
Subject: Re: Hemi Powered '56 Plymouth



Expert

Posts: 4893
20002000500100100100252525
Location: Lower Mainland BC
Mopar1 - 2018-03-15 11:07 AM

Actually referring to the "331 hemi Head" decal, obviously modeled on the 426 decal.


I'm guessing that was a one-off, just like the one I made for my 315 D500 Hemi. I started with a 426 Hemi decal image.


Edited by 56D500boy 2018-03-15 11:38 AM




(DaveFsD500EngineWithFaked315HemiHeadVinylSticker.jpg)



Attachments
----------------
Attachments DaveFsD500EngineWithFaked315HemiHeadVinylSticker.jpg (174KB - 104 downloads)
Top of the page Bottom of the page
Mopar1
Posted 2018-03-15 11:49 AM (#559939 - in reply to #559938)
Subject: Re: Hemi Powered '56 Plymouth



Expert

Posts: 2727
200050010010025
Location: N.W. Fla.
nice!
Top of the page Bottom of the page
Powerflite
Posted 2018-09-09 11:06 AM (#569848 - in reply to #480421)
Subject: RE: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 5655
50005001002525
Location: So. California
I took it to work and took some pictures for the new insurance. Should be much cheaper than what I currently have.



(Savoy At Work.jpg)



(Savoy At Work Rear.jpg)



Attachments
----------------
Attachments Savoy At Work.jpg (160KB - 83 downloads)
Attachments Savoy At Work Rear.jpg (234KB - 83 downloads)
Top of the page Bottom of the page
57burb
Posted 2018-09-09 11:42 AM (#569851 - in reply to #480421)
Subject: Re: Hemi Powered '56 Plymouth



Expert

Posts: 3599
20001000500252525
Location: DFW, TX
That is a great looking ride, man!
Top of the page Bottom of the page
Powerflite
Posted 2018-09-09 1:51 PM (#569856 - in reply to #480421)
Subject: Re: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 5655
50005001002525
Location: So. California
Thanks Danny. I have made some mistakes on it along the way, but I like it and it's a fun car. It has recently developed a backfire problem while under load, so I can no longer take it camping until I get that fixed. But it cruises fine still. I am going to try changing the timing chain to see if that fixes it. This motor has never been touched since new. It still had the original spark plug wires on it until a month ago so it's probable that the chain may be loose now.
Top of the page Bottom of the page
1960fury
Posted 2018-09-09 3:14 PM (#569862 - in reply to #480421)
Subject: Re: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 6063
500010002525
Location: northern germany
Great car and a good example that aluminum rims don't have to be tasteless on a 50s car.
Top of the page Bottom of the page
Powerflite
Posted 2018-09-15 12:50 PM (#570146 - in reply to #480421)
Subject: RE: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 5655
50005001002525
Location: So. California
Thanks Sid, I agree. I wish I had picked 16" instead of 17", but too expensive to change my mind now, so they are staying as-is.

Someone decided that they needed my air cleaner more than I did and stole it from me. Of all the things to steal. What are they going to do with it? I seriously doubt they have a '55-'56 Chrysler product to put it on....but whatever. So now I am making another one. I have a temporary air cleaner on it in the mean time.

This one is heavily dented around the upper edge of it. That's unacceptable because they are usually pretty impossible to fix. However, I cut out the inside of it along the top inner lip and it detached the whole inner structure. I removed the top section of it and notched it at the bottom to be able to remove it from the can. Now I can get inside the outer can, all around to repair the dents. It also allows me to clean up the inner structure to make it look better and allows for better air flow around the filters - especially at the top entrance near the lid. But I will need to create lower mounts to support the tray to the bottom of the can now, and weld them into place. I will also make a flat section to mount to the bottom ring to provide a flat surface for the air filters to sit on instead of the thinner, slanted section that they would have otherwise. I will also try to reduce the carburetor mounting ring extension so the cleaner sits lower than my old one. That was the one thing that bothered me about the way I set up the old one, so this gives me a chance to fix that.



(Oil Bath Cut Out.jpg)



Attachments
----------------
Attachments Oil Bath Cut Out.jpg (205KB - 85 downloads)
Top of the page Bottom of the page
56D500boy
Posted 2018-09-15 2:10 PM (#570149 - in reply to #570146)
Subject: RE: Hemi Powered '56 Plymouth



Expert

Posts: 4893
20002000500100100100252525
Location: Lower Mainland BC

Sorry to hear about the theft Nathan.:( You had done a great job on that air cleaner. Much nicer than my oil to paper conversion or my "Ram Air" versions.

Think of it this way, you have the opportunity to make this next one even better.

Yours:



Mine

Oil to paper:





"Ram Air":



Edited by 56D500boy 2018-09-15 2:11 PM
Top of the page Bottom of the page
Powerflite
Posted 2019-03-14 7:04 PM (#579325 - in reply to #480421)
Subject: RE: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 5655
50005001002525
Location: So. California
I ended up purchasing another air cleaner from the Turlock swap meet in much better shape than the other one, so I decided to use that one instead. I cut it out and welded in the larger carb mount. This time I welded it in about 3/8" lower than before to make it sit lower on the carb. I had to clearance the bottom of the air cleaner in 3 places as a result, but it wasn't bad. I decided not to paint it yet because it doesn't look terrible as it is. I like how it sits on there now, so I'm happy with it.



(AirCleaner 2.0.jpg)



(56 Chrysler Air Cleaner Lower.jpg)



Attachments
----------------
Attachments AirCleaner 2.0.jpg (272KB - 39 downloads)
Attachments 56 Chrysler Air Cleaner Lower.jpg (214KB - 37 downloads)
Top of the page Bottom of the page
Powerflite
Posted 2019-07-14 2:54 AM (#584794 - in reply to #480421)
Subject: RE: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 5655
50005001002525
Location: So. California
The motor has been losing power any time it is under load, and then will backfire if you try to push it as well. I have determined that the problem has nothing to do with the ignition or the fuel so it is either a problem with the valves, cam, lifters or timing chain. It has been getting worse and makes it impossible to pull a loaded trailer with the car, which is my primary use for it. So I am tearing it down for a refreshing and will rebuild the top end & replace the cam.

When I pulled the valve covers, I was surprised to see that none of the valves were depressed very much. I can also turn the valve springs by hand and they don't seem to be putting much pressure on the valves. What would cause the valves not to be depressed like that? I pulled the lifters and there was a good amount of wear on them, but no gouging or other major issues. Maybe the lifters were leaking down really fast? Or maybe the wear had reduced the lift to a point that it wasn't opening very far? Could any of that cause backfiring under load?

I put up an easy-up to make ti bearable to work out in 105 degree weather without dying. I had to lift the head with an engine puller too because I don't trust my back to survive such an endeavor. Hemi heads are not to be trifled with.



(56Plym Hemi Head Pull.jpg)



Attachments
----------------
Attachments 56Plym Hemi Head Pull.jpg (192KB - 8 downloads)
Top of the page Bottom of the page
Powerflite
Posted 2019-07-14 3:31 AM (#584795 - in reply to #480421)
Subject: RE: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 5655
50005001002525
Location: So. California
For future reference, this is how I had re-arranged the pipes on the header to make this motor fit well in this car. The upper control arm fits between the two front exhaust pipes so that you can get the motor to sit down low in the engine bay as it should. This is why stock exhaust manifolds don't work well here. Custom pipes are pretty much the only way to go without raising the motor enough to clear the upper control arms. However, this Chinese shorty header dumps straight down as they all do. This requires that you route the exhaust under the steering linkage, giving you something to hit on speed bumps or any time the car bounces when loaded down. Over the course of time, I have flattened mine out pretty good.

So while I am tearing the top end of the motor apart, I am going to build a custom set of long headers, starting from ones made by Patriot Exhaust for a big block in a '57 Chevy. The collector fits along the right side pretty nicely.



(56Plym Shorty Heaader Config Side.jpg)



(56Plym Shorty Heaader Config Front.jpg)



(56Plym Hemi-Chevy Collector.jpg)



Attachments
----------------
Attachments 56Plym Shorty Heaader Config Side.jpg (211KB - 9 downloads)
Attachments 56Plym Shorty Heaader Config Front.jpg (123KB - 10 downloads)
Attachments 56Plym Hemi-Chevy Collector.jpg (135KB - 9 downloads)
Top of the page Bottom of the page
Powerflite
Posted 2019-07-14 3:54 AM (#584797 - in reply to #480421)
Subject: RE: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 5655
50005001002525
Location: So. California
These '57 Chevy headers are a nice starting point because the bodies are similarly shaped and it uses 1 7/8" tubes with equal spaced ports like the old hemi does. It also uses thick 16 gauge tubes so they shouldn't be obnoxiously loud when finished. They might fit between the idler arm and the trans if I keep the forward ports lined up, but I am thinking I might shorten the rear-most pipes to turn upward before the idler arm (or lengthen the front ones?). This would give it a lot more room around the idler arm. Looks like the best oil filter with this setup would be one that points forward, not downward as I currently have it.

I wasn't able to remove my old headers without removing the head first. There just isn't a lot of room to get to those inner nuts while it's on the motor. I am a little worried about the assembly sequence for these long headers because I wouldn't be able to assemble them off the car first; they are just too big for that. So I'll have to make sure I can access all the mounting nuts somehow ahead of time. These cylinders have surprisingly little wear to them. I was expecting much worse! The front piston is at TDC, so this is what 8.5:1 compression pistons look like for a 331. I am thinking of milling the heads to gain a compression point if I can get away with that.



(56Plym Hemi-Chevy Header.jpg)



Attachments
----------------
Attachments 56Plym Hemi-Chevy Header.jpg (175KB - 9 downloads)
Top of the page Bottom of the page
58coupe
Posted 2019-07-14 12:06 PM (#584809 - in reply to #480421)
Subject: Re: Hemi Powered '56 Plymouth



Expert

Posts: 1401
1000100100100100
Location: Alaska
I have seen broken valve springs cause a backfire under load, I suppose if they are very weak it might act the same.
Top of the page Bottom of the page
62 413
Posted 2019-07-14 12:42 PM (#584812 - in reply to #480421)
Subject: RE: Hemi Powered '56 Plymouth


Veteran

Posts: 291
100100252525
Location: South Central PA
How about a Hemi powered 55 Wagon.



(Picture 350.jpg)



(Picture 354.jpg)



(Picture 351.jpg)



Attachments
----------------
Attachments Picture 350.jpg (174KB - 9 downloads)
Attachments Picture 354.jpg (179KB - 8 downloads)
Attachments Picture 351.jpg (147KB - 7 downloads)
Top of the page Bottom of the page
Mopar1
Posted 2019-07-14 3:05 PM (#584821 - in reply to #584797)
Subject: RE: Hemi Powered '56 Plymouth



Expert

Posts: 2727
200050010010025
Location: N.W. Fla.
Powerflite - 2019-07-14 2:54 AM

I am thinking of milling the heads to gain a compression point if I can get away with that.
Milling effects the valve geometry. I wouldn't mill unless there's a really good reason for it. Live with the 8.5 until it needs a rebuild & then get the higher C/R pistons.
Top of the page Bottom of the page
Powerflite
Posted 2019-07-14 6:09 PM (#584833 - in reply to #480421)
Subject: Re: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 5655
50005001002525
Location: So. California
Thanks a lot for the input, Rolland. This thing has me a little baffled so I am looking for answers. The timing chain seems to me to be the most plausible cause, but checking the slack at the distributor by rotating the motor back and forth, it doesn't seem bad enough to cause what I am experiencing.

George, I knew that milling would affect the intake fit, so you can only go so far before you run into trouble, but I would expect that adjustable push rods should take care of the valve timing. Nevertheless, I am a little worried about valve clearances to the pistons if I start milling because even on a flat top piston, the valves can get pretty close to it with the hemi valve angle.

That '55 wagon looks really nice Bill and I am sure it has more than enough power, but I prefer to use a first gen hemi in these cars. Even though my car is obviously not stock, I try to keep most of it *looking* like it could have been built back in the '50's. I haven't always felt this way about the car so my wheels deviate from that goal a little bit, but I find I like it better that way. I would be more tempted to drop a 426 hemi into my '70 Satellite wagon where it would look more at home.
Top of the page Bottom of the page
Powerflite
Posted 2019-07-27 10:56 PM (#585308 - in reply to #480421)
Subject: RE: Hemi Powered '56 Plymouth



Expert 5K+

Posts: 5655
50005001002525
Location: So. California
I got to play with my expensive legos today to design the new headers for the right side. I have them mounted in the collector pipes because the head flange is too un-circular to make the connectors work. The 2 rear pipes are currently too close to each other so I need to cut the forward one down and re-adjust the pipes afterward. I am planning to use the legos to get the parts cut and matched to the design, but then check & mark them first under the car before welding it together. I'll start at the back cylinder and move forward as I go. I thought I had a forward facing oil filter to check the fit, but after digging through my stuff, I apparently don't so I'll have to get one soon. I also need to check the idler arm movement before I get too far...



(Right Header Design Bottom.jpg)



(Right Header Design Top.jpg)



Attachments
----------------
Attachments Right Header Design Bottom.jpg (79KB - 7 downloads)
Attachments Right Header Design Top.jpg (135KB - 7 downloads)
Top of the page Bottom of the page
Jump to page : 1 2
Now viewing page 2 [50 messages per page]
Jump to forum :
Search this forum
Printer friendly version
E-mail a link to this thread



(Delete all cookies set by this site)