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  1. #1
    Join Date
    Nov 2011
    Location
    Iowa
    Posts
    65

    Default Erson Stage 2 Buick 455 Cam? WHAT IS IT?

    Hey guys just spoke to a guy here close to my hometown who had a 70' GS 455 back in the day and is getting rid of a few things he has left over. He has numerous odds and end but he was telling me he has a Erson Stage 2 Cam he bought in 1970 and is still new in the box and was suppose to be a hot part for a 455. My question is does anyone know anything about this cam and would it be safe to use in a car still 2day since its still untouched. NOS.
    Matt
    1972 GS Project 455 (MINE)
    1972 GS 350 4 speed (DAD's)

  2. #2
    Join Date
    Jan 2005
    Posts
    560

    Default Re: Erson Stage 2 Buick 455 Cam? WHAT IS IT?

    This part could be of value to someone trying to build a Stage 2 tribute engine, Sig Erson Cams was one of the suppliers of the Stage 2 cams for Buick over-the-counter parts sales. The part can be identified by two grooves machined near the front end of the cam.
    Last edited by motorman; 06-18-2012 at 10:40 PM. Reason: Add a sentence.

  3. #3
    Join Date
    Feb 2002
    Location
    NY
    Posts
    13,417

    Default Re: Erson Stage 2 Buick 455 Cam? WHAT IS IT?

    depends how it was stored ...
    Alan W

    BPG # 1048 - Charter Member
    NE GS/GN Club - 17 Year Member
    68/69 Buick StepChild Nation - 29 Year Member

    What is a Buick StepChild ?
    Quote Originally Posted by 442w30 View Post
    ... They have awkward proportions from certain angles, and they look dumpy compared to their GM brethren
    ....'68 SportWagon400 "Sportn'Wood"..............'69 GS400 Convert "BigRed"..........

  4. #4
    Join Date
    Nov 2011
    Location
    Iowa
    Posts
    65

    Default Re: Erson Stage 2 Buick 455 Cam? WHAT IS IT?

    Would this be a good cam if it is still in good shape? How would it compare up to just a stock cam or after market comp cam?
    Matt
    1972 GS Project 455 (MINE)
    1972 GS 350 4 speed (DAD's)

  5. #5
    Join Date
    May 2002
    Location
    Mid-Ohio
    Posts
    1,193

    Default Re: Erson Stage 2 Buick 455 Cam? WHAT IS IT?

    Quote Originally Posted by Hansen72GS View Post
    Would this be a good cam if it is still in good shape? How would it compare up to just a stock cam or after market comp cam?
    Keep in mind that the factory Stage 2 cam is late 1960s racing technology. It had relatively low valve lifts, and very long durations on a narrow lobe seperation angle. Overlap was high, and vacuum was low. Probably too low to operate power brakes. It was more likely than not, designed to be used with an open exhaust. I am not saying that it is not a good cam, but agree with motorman that it's greatest value would be to someone building a vintage (iron head) Stage 2 motor. With all the cam grinds available today, I would view the factory Stage 2 cam as a nostalgia part.
    Jim Jones

    BPG #2200
    GSCA Drop-out

    70 GSX #348 Stage 1, Q-Q, TH400, no A/C.
    70 Stage 1 58-58/Black buckets, TH400, no A/C (work-in-progress).

    USED-TO-BEs

    70 GS455 Conv. 19-A/White buckets, TH400.
    70 GS Stage 1, R26-B/Black buckets, M-21.
    70 GS455 Conv. 55-E/Burnished Saddle bench, TH400.
    70 Stage 1, 78-F/Burnished Saddle buckets, M-21, (regret I let this one get away).
    70 Stage 1, 10-F/ Burnished Saddle buckets, TH400.
    70 GS455, 55-B/Black buckets, TH400.

    and...STILL LOOKING

 

 

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