old erson cam specs 1m286y ?

[stroker402]

would anyone have an old erson cam spec catalog ? I need to know the specs of this erson cam > This is what is stamped on the end of the cam
1m286y it's a high flow cam for a 273 mopar sb.

I did call erson cams and john gave me a website to look some info up but didn't find what I was searching for . john gave a number of E420-721 .... this number I could not find info on but e410721 had some info . I think he typed the wrong number in . hate to keep bothering him. I need to know what the cam card specs are expecially duration , llft and valve lash .
Thanks guys !
john

 

[toolmanmike]

Interesting, Subscribed

 

[fishmens67]

I don't understand why PBM doesn't have to old cam cards and part#'s. I tried to find the specs for a late 70's vintage BB hydraulic to no avail.
good luck on your search, most of what you will find is for the hi-flo series. Erson had some nice split pattern cams in the late 70's early 80's.

 

[toolmanmike]

There's a 420306 but it would be too big for a 273.

• Hi-Flow AM
• E420306
• RPM Range 3500-6500
• Advertised Duration 286°/294°
• Duration @ .050 Lift 242/246 deg int/exh
• Valve Lift .510in int/exh w/1.5 rocker
• Lobe Separation 108 deg
• Advance 0 deg
• Valve Lash .018/.018"
• Complete with Lifters and Assembly Lube
• We recommend Pro-Duty Hardened lifters with .012 lube hole in bottom - Part# ML752 SEE BELOW

 

[Abodybomber]

There's a 420306 but it would be too big for a 273.

• Hi-Flow AM
• E420306
• RPM Range 3500-6500
• Advertised Duration 286°/294°
• Duration @ .050 Lift 242/246 deg int/exh
• Valve Lift .510in int/exh w/1.5 rocker
• Lobe Separation 108 deg
• Advance 0 deg
• Valve Lash .018/.018"
• Complete with Lifters and Assembly Lube
• We recommend Pro-Duty Hardened lifters with .012 lube hole in bottom - Part# ML752 SEE BELOW

TMM sure looks like a narrow lobe version, of Harvey Cranes work... These questions, are exactly why , I gather old speed equipment cataloging....

 

[stroker402]

maybe someone will chime in with an old erson cam catalog.

 

[stroker402]

from what I am gathering from looking at these cam profiles . the number that is stamped on the cam end ( mine = 1m286y ) will be the advertised duration. 286* .My guess.

 

[stroker402]

from what I am gathering from looking at these cam profiles . the number that is stamped on the cam end ( mine = 1m286y ) will be the advertised duration. 286* .My guess.

Here are the specs :
Part No.: E420721

Grind: HI FLOW I M

SOLID

107 Lobe Separation Angle



Overlap: 72.00



Intake Opens: 36.00 Exhaust Closes: 36.00



Intake Closes: 70.00 Exhaust Opens: 70.00



Running Clearance: 0.022 0.022 [Hot]



Valve Lift (Int / Exh): 0.510 0.510



Duration (Int / Exh): 286 286









Checking Figures @ .050" Tappet Rise



Overlap: 28.00



Intake Opens: 14.00 Exhaust Closes: 14.00



Intake Closes: 48.00 Exhaust Opens: 48.00



Duration Intake: 242.0 Duration Exhaust: 242.0



Lobe Lift Intake: 0.340 Lobe Lift Exhaust: 0.340



Intake Center Line: 107



Rocker Arm Ratio: 1.50

 

[perfacar]

would anyone have an old erson cam spec catalog ? I need to know the specs of this erson cam > This is what is stamped on the end of the cam
1m286y it's a high flow cam for a 273 mopar sb.

I did call erson cams and john gave me a website to look some info up but didn't find what I was searching for . john gave a number of E420-721 .... this number I could not find info on but e410721 had some info . I think he typed the wrong number in . hate to keep bothering him. I need to know what the cam card specs are expecially duration , llft and valve lash .
Thanks guys !
john

according to my old erson catalog. it's a high flow Im. 286/240 duration, .492 lift, .022 lash. cam part # is 420721. says, it's a hi lift , short duration,, delivers strong power from 2000 to 7000, good idle, good for auto with gears.

 

[stroker402]

according to my old erson catalog. it's a high flow Im. 286/240 duration, .492 lift, .022 lash. cam part # is 420721. says, it's a hi lift , short duration,, delivers strong power from 2000 to 7000, good idle, good for auto with gears.

Thanks Perfacar !
Yeah , john at erson sent me the cam card specs yesterday afternoon. same info as you sent over perfacar , cam lift probally 492-510. stout cam for sure ! it will be used with a 273 commando, 4 speed and nice gear set .