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Thread: Isky Cams?

  1. #1
    Do you ever leave? immortality's Avatar
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    Default Isky Cams?

    Anybody have any experience with Isky Cams?

  2. #2
    been here .......too long Smitty2's Avatar
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    Quote Originally Posted by immortality View Post
    Anybody have any experience with Isky Cams?

    long time old brand that... !

    knew they made them for Chev SB and Ford but never heard of one on a 'plastic'
    they still around?
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    Do you ever leave? immortality's Avatar
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    Yeah, we found some grinds to suit the 98 VT model, both hydro FT and hydro roller. Reasonably well priced so thinking of giving one a go.

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    Do you ever leave? EH179's Avatar
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    Z50 in an old 308 and you had the toughest sounding car in town.

    Great cams.

  5. #5
    been here .......too long Smitty2's Avatar
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    Quote Originally Posted by EH179 View Post
    Z50 in an old 308 and you had the toughest sounding car in town.

    Great cams.

    never heard of one in a 308 but specs from ISKY

    Cam Style:
    Mechanical flat tappet
    Basic Operating RPM Range:
    3,500-7,500
    Intake Duration at 050 inch Lift:
    254
    Exhaust Duration at 050 inch Lift:
    254
    Duration at 050 inch Lift:
    254 int./254 exh.
    Advertised Intake Duration:
    300
    Advertised Exhaust Duration:
    300
    Advertised Duration:
    300 int./300 exh.
    Intake Valve Lift with Factory Rocker Arm Ratio:
    0.507 in.
    Exhaust Valve Lift with Factory Rocker Arm Ratio:
    0.507 in.
    Valve Lift with Factory Rocker Arm Ratio:
    0.507 int./0.507 exh.
    Lobe Separation (degrees):
    108
    Intake Valve Lash:
    0.028 in.
    Exhaust Valve Lash:
    0.028 in.
    Grind Number:
    Z-50



    the 108LSA would make it sound pretty angry alright!
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  6. #6
    Do you ever leave? EH179's Avatar
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    Typical old Chevy design with big duration and low lift.

    Also remember a 308 engined car with a Sig Erson 320 HLM, that had similar numbers to the Isky cam.

  7. #7
    Do you ever leave? immortality's Avatar
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    What we are looking at is 232/232 @.050, 280/280 advertised on 108lsa. .485" valve lift with 1.5 rockers so with our 1.65 rockers we should see .533" valve lift. But I'll be using the scorpion rockers so actual valve lift will probably be a bit more still.

    Powerband advertised at 2500-6800 rpm.

  8. #8
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    Isky. Great cams. And you will notice a trend in recent years to tighter LSA cams. Look at an Isky 70s catalog & he was selling tight LSA cams back then....

    I have degreed a few Isky, Comp & Bullet FT cams over the last 20 yrs. Comp are always the most accurate, with Isky & Bullet about equal second.

    And you know this bullshit you have read about cam 'intensity', the duration between the adv duration & the duration at fifty? How the 'modern' cams have shortened this up so that you get improved idle, yet good top end? Something new?

    Isky had a grind in the 1974 catalog for Chryslers called the B-777. It was a sol lifter FT grind. I used it a few times in the 70s/80s. Was so impressed with it, I had a local cam grinder make a copy. As with many sol lifter cams, adv duration was at 0.020" lifter rise. It had 268 @ 0.020", & 240 @ 050. That is only 28*. Try finding a cam today that beats that. Might find one with 26-27*, but Isky had it 50 yrs ago.

    Another good read on Isky's website is the Tech Tips, in particular: Extra exh duration, is it really necessary?
    Last custom grind I had done by Isky, they sent by Post Office, saved some money there.

  9. #9
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    I had an Isky (hyd ft) in my ol 308 back in the day. It was good.

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