Cam Profile Question

[mlozier76]

I'm finally sending out my carbs and getting ready to set the motor in my 48 Coupe this weekend.  I had Earl Edgerton machine my cam with a "Boy Racer Grind", but have forgotten the specs.  I am planning to send the dual carbs out to be rebuilt and thought it may benefit them to have that info.  Have any of you used that grind?  I had found the specs on the Montana Dodge Boys website, but it appears to be a dead link now.  Any help would be greatly appreciated.  

  So far this is what I've had done.  New pistons 0.040" over, new bearings, 0.020", Boy Racer Cam Grind, dual intake will be Holley 94s on a Bill Shanafelt Dual intake, and Phillips Performance Dual Exhaust manifolds.  I'm looking forward to being able to enjoy the ride, as its been a tumultuous one.  Lots of waiting on machine work, then the Hot Rod Blues hit in the winter, and I couldn't get a start on any projects.  I'm trying to stay motivated.

[Sniper]

Wow, the entire moparmontana site is down. 

[mlozier76]

I just found out on the Facebook Mopar Vintage Speed Group (which I didn't know was their page until just now) that they are looking for a new web host.   

[mlozier76]

In case anybody wanted to know.  I was able to find a saved version of the web page with the specs for the Boy Racer Grind from the MoparMontana web page.

Boy Racer Grind


Ground exclusively for us by Earl "EDGY" Edgerton, this is by far our most recommended & popular grind. It has accounted for nearly 90% of EDGY's camshaft sales since 1996.


This camshaft provides noticeably more power without sacrificing low end torque. Great for a daily driver full-bodied car or truck. Good vacuum and idle. Slight lope, and excellent drivability.


Advertised duration - 260*
Duration @ .050" - 222*
Lift - .410"
Lash - .014"

[greg g]

Anybody have the stock specs across the years?   Did the specs change as compression increased in the 50s? What's the difference between  a 40s 103 hp 230 and the 130 + developed in the late 50s?

[FarmerJon]

I would love to see some pictures of your Shanafelt intake. I hadn't heard of him before, sounds like he was a fairly big producer of speed equipment, for a brief while and an influence on Eddy Edmunds.

 

I dont have manuals that cover later cars, but a few years ago, a guy on a power wagon site got a few cams analized and posted a bit about it 

 

"Here are the OEM 230 specs @ .050" lift (They couldn't duplicate the OEM measurement process- no one seems to know how it was done back then).

Early 230-

Intake Opens @ -5.6 deg BTDC, Closes 32.6 deg ABDC
Exhaust Opens @ 32.1 deg BBDC, Closes @ -5.6 Deg ATDC
Intake Duration- 207.1 Crank Deg @ .050"
Exhaust Duration- 206.5 Crank Deg @ .050"
Overlap- -11.1 Crank Deg
Intake Centerline- 109 deg
Exhaust Centerline- 108.8 deg
Intake Lift- .3719"
Exhaust Lift- .3722"
Lobe Separation Angle- 108.9 Cam Deg

M-37 Cam-

Intake Opens @ -3.5 Deg BTDC, Closes @ 31.9 Deg ABDC
Exhaust Opens @ 31.2 Deg BBDC, Opens @ -2.5 Deg ATDC
Intake Duration- 208.4 Deg @ .050"
Exhaust Duration- 208.7 Deg @ .050"
Overlap- -6.1 Deg
Intake Centerline- 108.0 Deg
Exhaust Centerline- 107.3 Deg
Intake Lift- .384"
Exhaust Lift- .382"
Lobe Separation Angle- 107.7 Deg
Retarded .4 Cam Deg @ .050"

The 400M Regrind-

Intake Opens @ -.6 Deg BTDC, Closes @ 35.8 Deg ABDC
Exhaust Opens @ 44.3 Deg BBDC, Closes @ -11.2 Deg ATDC
Intake Duration- 215.2 Deg @ .050"
Exhaust Duration- 213.1 Deg @ .050"
Overlap- -11.8 Deg
Intake Centerline- 108.0 Deg
Exhaust Centerline- 118.3 Deg
Intake Lift- .397"
Exhaust Lift- .400"
Lobe Separation Angle- 113.2 Deg
Advanced 5.2 Cam Deg @ .050"

https://powerwagonadvertiser.com/forums/forum/civilian-dodge-4x4-trucks/-1-ton-power-wagon/10375-230-251-cam-specs

 

My understanding is that in the very early '50s, Mopar changed a few minor things, including the snout of the camshaft. I would suspect there may have been a change to the profile then.  Maybe someone has a parts catalog that covers into the late '50s can see how many part numbers there are.

I would guess that Mopar would have had several cam profiles, for 217 vs 230, cars vs trucks and possibly the power pack option. Not sure if these HP and TQ specs are 100% accurate, but this reference shows a change in peak Torque RPM for the Power Pack engine:

http://www.carnut.com/specs/gen/ply50.html

Edited March 9, 2023 by FarmerJon

[mlozier76]

Here is a pic.  Unfortunately that's all I've done with the engine the last three years, take pictures of my engine, lol.  I have been fighting to get the engine worked on by machine shops and with myself.  I'm usually more motivated than I've been able to be, but I did get the runaround from a machine shop for over a year.  Some of them don't want to work on these inline sixes.  Thanks for the info that you guys share, it is so helpful to share knowledge, so it doesn't get lost.  I'll hopefully have this thing on the road by May.  I'm trying to aim for a party that another car club throws down near Boise in May, before our show in June.  Don't mind the writing, I was putting this on our car club Facebook page, as I recently became the Photo moderator for our Club.

 

 

Edited March 14, 2023 by mlozier76