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New cam needed for '58 Dodge 325ci poly
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flattie45
Posted 2012-11-07 4:35 PM (#346185)
Subject: New cam needed for '58 Dodge 325ci poly


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Location: Dorset, England
Does anyone know of a source?
OEM spec will do me.

Are there any parts suppliers I should avoid?

Any advice gratefully received, thanks John.
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Mopar1
Posted 2012-11-07 7:50 PM (#346205 - in reply to #346185)
Subject: Re: New cam needed for '58 Dodge 325ci poly



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You don't have one? Or you do but were hoping to find an NOS one?
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big m
Posted 2012-11-07 7:56 PM (#346207 - in reply to #346185)
Subject: Re: New cam needed for '58 Dodge 325ci poly



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Try Egge Machine in So Cal. They should have one in stock. Also be sure the oil you are using contains zinc, if not, camshaft wear will result.

---John
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wayfarer
Posted 2012-11-07 9:09 PM (#346222 - in reply to #346185)
Subject: Re: New cam needed for '58 Dodge 325ci poly



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I wouldn't hold my breath waiting for an NOS shaft. If you have a good core we can regrind it.
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flattie45
Posted 2012-11-08 3:00 AM (#346250 - in reply to #346185)
Subject: Re: New cam needed for '58 Dodge 325ci poly


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Location: Dorset, England
All I have is a very worn cam... I just need a replacement.

Egge Machine list 3 cams for the 361, but none for a 325.
Am I correct in thinking that they're not compatable 'cos the distributor is at the front on the bigger motor?

I have found one NOS cam but it's $500!! There has to be an alternative.
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rbmain
Posted 2012-11-08 4:22 AM (#346258 - in reply to #346185)
Subject: Re: New cam needed for '58 Dodge 325ci poly



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The alternative is to regrind your "worn" cam. Isn't the 325 cam basically the same as the 315, earlier 270, 259, and 241?

Edited by rbmain 2012-11-08 4:24 AM
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rbmain
Posted 2012-11-08 4:34 AM (#346259 - in reply to #346185)
Subject: Re: New cam needed for '58 Dodge 325ci poly



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Here's something I found at http://victorylibrary.com/mopar/dodge-c3.htm about the 325 cams:

Cam
New cams for these motors are not available. However, re-grinds (on your own good used cam) are available from some major cam manufacturers, but few specialize to the point where they can make a specific suggestion (rather than just tell you the specs of what’s available). Chris Neilson is an exception, see Source Table. The array of possible choices is not only frustrating, but the selections are usually based on intended use (RV, street, drags, oval track, fuel, etc.) and not really helpful. Re-ground cams (except welded overlay) have smaller base circles than stock cams, and therefore frequently need longer pushrods, depending on the new lift.
I have a very simple rule for cam selection. It’s based solely on motor size, since many other variables are known and similar: all the original cars are relatively heavy (3500 - 4000 lbs.), have low-number axle ratios, almost all have 2 or 3 speed transmissions (Powerflite or Torqueflite; no 5 speeds or O/D), no EFI, under 400” displacement, with moderate compression ratios, cast-iron heads, restrictive intake manifolds, etc. Forced induction or nitrous cams are special, don’t use these rules.
My cam selection rule does provide a safe choice for a warm street motor, with good manners and acceptable idle, suitable for a stock converter and highway axle ratio, but still provide a nice power increase when the “best” cam is not known, and too many choices are available.
To predict a useful cam for a “warm” street motor:
1. Take the size of the motor when completed. Divide by 10, and round off (270” becomes 27, 315” becomes 32, etc.).
2. Add 180. The result is the cam’s “duration @ .050” lift” (look for it in the cam manufacturer’s specs). For a 270” motor in this case: 207° (270 ÷ 10 = 27; 27 + 180 = 207). More power? Like that “racy” idle? Afford to lose a bit of low speed power? Add 10 to the .050” duration figure to get a hot motor (for a 270” motor in this case: 217°), best used with high compression (9-1 minimum), 4 bbl. or more, standard transmission or a loose torque converter, dual exhaust and high numerical gears (3.55, not 2.76). Heavy vehicle? Stock torque converter? 7-1 compression? 2 bbl. carburetor? Subtract 5 from the .050” figure (for a 270” motor in this case: 202°).
3. Advertised (total) duration: use the lowest figure you can find for the .050” duration value predicted in Step 2 above (i.e., 290° advertised duration is preferred to 300°, if both have the same 220° @ .050” lift).
4. Lift: as much as you can get, limited by the choices in Steps 2 & 3.
5. When in doubt, select the smaller of the two choices. More is not better here.
Is this the “very best” cam? No, but unless you ask an expert who has successfully built motors very similar to yours, it’s better than guessing, and will provide satisfying results. It will not be the “optimum” cam, which will require extensive testing and dynamometer work.
Don’t be too aggressive with motors under 300”, or under 8-1 compression; too much cam will make them hard to drive.
If the cam manufacturer suggests a specific valve spring, use it, don’t be creative. The motor will not last longer with weak springs, or develop more power with stronger springs.

Edited by rbmain 2012-11-08 4:35 AM
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DeSotohead
Posted 2012-11-08 10:46 AM (#346285 - in reply to #346258)
Subject: Re: New cam needed for '58 Dodge 325ci poly



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rbmain - 2012-11-08 4:22 AM

The alternative is to regrind your "worn" cam. Isn't the 325 cam basically the same as the 315, earlier 270, 259, and 241?


Richard...

A 325 cam (poly or hemi) is the same blank as one for a 315 (hemi or poly).
The low-deck 241/259/270 cams have different lobe angle or seperation due to a different lifter bore position between the low and high deck blocks.
So those cannot be used.

BTW, this also applies to the DeSoto and Chrysler block engines as well between low and high deck engines.

I agree with you that Chris Nielson is probably the best source for a regrind cam. He also may have some new replacement blanks for these engines now, as he was working on new castings for them since maybe 3 years ago.

Lastly, you can have the cam lobes plasma sprayed to build up material as a last resort if no other way can be found to get what you want in lift/duration/CL for your application.
But this is the expensive way to go.....
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wayfarer
Posted 2012-11-08 12:42 PM (#346297 - in reply to #346250)
Subject: Re: New cam needed for '58 Dodge 325ci poly



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flattie45 - 2012-11-09 12:00 AM

All I have is a very worn cam... I just need a replacement.

Egge Machine list 3 cams for the 361, but none for a 325.
Am I correct in thinking that they're not compatable 'cos the distributor is at the front on the bigger motor?

I have found one NOS cam but it's $500!! There has to be an alternative.


NOS would be nice but that is steep...I am still shocked that you actually found one. The danger of course, is that it is a regrind and someone is calling it NOS simply because it 'looks' new.
For us, after grinding, the cam is Parkerized and then we polish the journals so they look pretty much like new.

Also, keep in mind that any regrind will require adjustable or made to order pushrods as the base circle will change.
I have a couple of cores available if you want to talk about a regrind...
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ThomasD500
Posted 2012-11-08 6:53 PM (#346351 - in reply to #346285)
Subject: Re: New cam needed for '58 Dodge 325ci poly


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DeSotohead - 2012-11-08 10:46 AM
rbmain - 2012-11-08 4:22 AM  I agree with you that Chris Nielson is probably the best source for a regrind cam. He also may have some new replacement blanks for these engines now, as he was working on new castings for them since maybe 3 years ago.

Chris Nielson has already sold all the blanks that he had made.



Edited by ThomasD500 2012-11-08 6:54 PM
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flattie45
Posted 2012-11-09 4:17 PM (#346484 - in reply to #346185)
Subject: Re: New cam needed for '58 Dodge 325ci poly


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Posts: 134
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Location: Dorset, England
Can anyone tell me the correct part no. for the 325ci camshaft?
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d500neil
Posted 2012-11-09 5:12 PM (#346495 - in reply to #346484)
Subject: Re: New cam needed for '58 Dodge 325ci poly



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The 'numbers' are the easy part(-number)...

The 57 D500 guy is 1822 012

It appears that this guy will fit (and can be re-ground, for better performance): 1736 050

I've got the specs on the D500 cam, which is/are mild, and can be smiled upon considerably.

Those grinds are posted somewhere else around here; think Tom & I have the same grinds on our cams, now.



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