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Re: "Custom 33" [Re: Crizila] #1613511
09/12/14 03:21 PM
09/12/14 03:21 PM
Joined: Jan 2003
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dogdays Offline
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At the risk of prolonging this filibuster, you do not understand what neutral axis means. It's not roll center or roll axis. That's vehicle dynamics.

It's a term in engineering. As an example, imagine a one-inch bar. Support the ends and put a weight in the middle. As the bar is loaded, the upper fibers are in compression, the lower fibers are in tension. If you think about it you will understand that there must be a point where the fibers stop being in compression and start being in tension. That's the neutral axis. Tension = compression = 0 at that point.

When you start studying how material supports a load, you soon figure out that the farther the material is from the neutral axis, the more force it exerts "trying" to keep the piece in its original shape, resisting the load. At the neutral axis, the material isn't doing anything to resist the load.

Ever wonder why an I-beam is so strong for its weight? That's because most of the non-working material at the neutral axis isn't there. An I-beam puts most of the material as far as possible from the neutral axis, meaning that most of the material is working hard to resist the load. The web itself only has to be strong enough to resist crushing.

R.

Re: "Custom 33" [Re: dogdays] #1613512
09/12/14 09:09 PM
09/12/14 09:09 PM
Joined: Oct 2003
Posts: 7,506
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Crizila Offline OP
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Crizila  Offline OP
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Quote:

At the risk of prolonging this filibuster, you do not understand what neutral axis means. It's not roll center or roll axis. That's vehicle dynamics.

It's a term in engineering. As an example, imagine a one-inch bar. Support the ends and put a weight in the middle. As the bar is loaded, the upper fibers are in compression, the lower fibers are in tension. If you think about it you will understand that there must be a point where the fibers stop being in compression and start being in tension. That's the neutral axis. Tension = compression = 0 at that point.

When you start studying how material supports a load, you soon figure out that the farther the material is from the neutral axis, the more force it exerts "trying" to keep the piece in its original shape, resisting the load. At the neutral axis, the material isn't doing anything to resist the load.

Ever wonder why an I-beam is so strong for its weight? That's because most of the non-working material at the neutral axis isn't there. An I-beam puts most of the material as far as possible from the neutral axis, meaning that most of the material is working hard to resist the load. The web itself only has to be strong enough to resist crushing.

R.


- I .


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Re: "Custom 33" [Re: dogdays] #1613513
09/12/14 10:44 PM
09/12/14 10:44 PM
Joined: May 2014
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Matt Erich Offline
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R.

I enjoy talking with other that have a engineering background and thank you for the explanation of the "I" beam because that is in fact the exact scenario I am duplicating. The 2x4 rails being the top and bottom of the "I" and the center bracing of the chassis which is also connected to the steel interior via 1/2 bolt. The fiberglass floor board is sandwiched between the 2 pieces of steel. The steel cage that we have built and put into place also is welded to the steel thus creating a close resemblance to a Unibody.

Some mopar fans compare everything to the 60-70 steel cars and I will never argue that my car is as safe or even close! I will say that custom33 has more support and reinforcement then the majority of street rod companies.


Owner of Custom33.com 1933 Plymouth Coupe and Roadster Kits
Re: "Custom 33" [Re: Matt Erich] #1613514
09/13/14 06:28 AM
09/13/14 06:28 AM
Joined: Sep 2003
Posts: 19,237
north of coder
moparx Offline
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north of coder
in the pic crizila posted of the floor structure, is the 1/4 plate tied into the transmission tunnel ? what material is the tunnel made of ? i like the fact of the floor thickness being capable of seat and restraint mounting without fear of pull through or improper mounting techniques used to accomplish the same.

Re: "Custom 33" [Re: moparx] #1613515
09/14/14 12:30 PM
09/14/14 12:30 PM
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Matt Erich Offline
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I will try and post pictures of the chassis soon. The chassis has bracing that comes off the frame and follows the outside edge of the steel floors. The outside edge of the floor pans is where the 12 1/2bolts tie it all in. Weld bungs have been put into the frame and steel bracing.


Owner of Custom33.com 1933 Plymouth Coupe and Roadster Kits
Re: "Custom 33" [Re: Matt Erich] #1613516
10/22/14 12:04 PM
10/22/14 12:04 PM
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Crizila Offline OP
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Interior work.

8308267-33interior1.jpg (197 downloads)

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Re: "Custom 33" [Re: Crizila] #1613517
11/26/14 12:24 AM
11/26/14 12:24 AM
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Crizila Offline OP
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Mocking up the motor.

8342147-motormounts1.jpg (191 downloads)

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Re: "Custom 33" [Re: Crizila] #1613518
11/26/14 12:25 AM
11/26/14 12:25 AM
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Crizila Offline OP
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nuther

8342149-motormounts5.jpg (206 downloads)

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Re: "Custom 33" [Re: Crizila] #1613519
11/26/14 12:28 AM
11/26/14 12:28 AM
Joined: Nov 2005
Posts: 15,118
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moparpollack Offline
Lil Herman
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So it will be ready for the HEMI show in march right.


56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
Re: "Custom 33" [Re: Crizila] #1613520
11/26/14 12:28 AM
11/26/14 12:28 AM
Joined: Oct 2003
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Crizila Offline OP
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Trans mount - modified GM mount.

8342152-transmt1.jpg (187 downloads)

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Re: "Custom 33" [Re: moparpollack] #1613521
11/26/14 12:35 AM
11/26/14 12:35 AM
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Crizila Offline OP
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Quote:

So it will be ready for the HEMI show in march right.


Sure - March 2016.

8342157-33kiddiecar.jpg (177 downloads)

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Re: "Custom 33" [Re: Crizila] #1613522
11/27/14 09:40 AM
11/27/14 09:40 AM
Joined: Sep 2003
Posts: 19,237
north of coder
moparx Offline
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looking good ! progress makes a guy feel like something ! could you possibly take a pic of your steering shaft idler & mount, as well as measuring the distance between the column and shaft as it passes the block/bellhousing attachment area ? thanks !

Re: "Custom 33" [Re: Crizila] #1613523
11/27/14 12:11 PM
11/27/14 12:11 PM
Joined: Nov 2005
Posts: 15,118
85086
moparpollack Offline
Lil Herman
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Quote:

Quote:

So it will be ready for the HEMI show in march right.


Sure - March 2016.




If you bring she 300 this year I will stop by and say hi!


56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
Re: "Custom 33" [Re: moparpollack] #1613524
11/27/14 12:23 PM
11/27/14 12:23 PM
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Crizila Offline OP
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Quote:

Quote:

Quote:

So it will be ready for the HEMI show in march right.


Sure - March 2016.




If you bring she 300 this year I will stop by and say hi!


Been suffering with the 300 this year John. If I bring it and you stop by, I might just give it to you!


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Re: "Custom 33" [Re: Crizila] #1613525
11/27/14 01:03 PM
11/27/14 01:03 PM
Joined: Nov 2005
Posts: 15,118
85086
moparpollack Offline
Lil Herman
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Quote:

Quote:

Quote:

Quote:

So it will be ready for the HEMI show in march right.


Sure - March 2016.




If you bring she 300 this year I will stop by and say hi!


Been suffering with the 300 this year John. If I bring it and you stop by, I might just give it to you!




Cool!


56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
Re: "Custom 33" [Re: moparx] #1613526
11/27/14 02:38 PM
11/27/14 02:38 PM
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Crizila Offline OP
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Quote:

looking good ! progress makes a guy feel like something ! could you possibly take a pic of your steering shaft idler & mount, as well as measuring the distance between the column and shaft as it passes the block/bellhousing attachment area ? thanks !



Attached are some pics Eric. Hope they help. As you know, room is always a trade off with theses types of projects. Went with a 33" column. 5" sticking out the firewall. Steering shaft ( 3/4" double D ) is 28" long. Header clearance is 1/2". Column to steering shaft angle is 25*. Steering shaft to rack is at 30*. I am going to try it this way ( without a steering shaft support bearing ), hoping there won't be any steering shaft flex. If there is, I will add a support bearing near where the shaft goes through the engine mount. Full size starter won't clear. Gonna have to go with a mini starter.


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Re: "Custom 33" [Re: Crizila] #1613527
11/27/14 02:41 PM
11/27/14 02:41 PM
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Crizila Offline OP
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nuther pic

Last edited by Crizila; 11/27/14 02:43 PM.
Re: "Custom 33" [Re: Crizila] #1613528
11/27/14 02:47 PM
11/27/14 02:47 PM
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Crizila Offline OP
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last pic

8343547-strngshaft1.jpg (158 downloads)

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Re: "Custom 33" [Re: Crizila] #1613529
11/27/14 03:45 PM
11/27/14 03:45 PM
Joined: Aug 2003
Posts: 18,575
Dreaming of the 808
AZ_A12_BEE Offline
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Since its a fiberglass body and custom frame what will it be tiitled and registered as?


69.5 A12 Bee, first purchased in 1976, car 169 on registry 69 Coronet R/T 440/4 spd 69 Coronet 500 Conv H code 383 4bbl/auto 37 Plymouth PU Find your spot on earth and ride it.
Re: "Custom 33" [Re: AZ_A12_BEE] #1613530
11/27/14 04:47 PM
11/27/14 04:47 PM
Joined: Oct 2003
Posts: 7,506
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Crizila Offline OP
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Quote:

Since its a fiberglass body and custom frame what will it be tiitled and registered as?


C of O provided by the vendor - "Custom 33". Makes it easy at the DMV. Titled as a 1933 Plymouth with serial #.


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