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Old 02-11-2004, 03:46 PM
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help identify this erson camshaft

Hey everyone,

I've run into a frustrating situation trying to identify this Sig Erson camshaft, labeled "HIFL1H" but bearing no other markings than 7-94 (Which looks like the date of manufacture). Erson was sold to Holley / Mr. Gasket and no one there can find any reference to this cam grind.

Anyone have any clue on this one? My last hope is to run a mock setup with a cam wheel and try and map the lobe patterns by hand... yikes.

thanks in advance for any help

the blonde weasel
san diego, CA

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Old 02-11-2004, 07:00 PM
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That set of letters is an abbreviation for "Hi Flow IH"

That only tells the grind not if its a Chevy or Pontiac or whatever you'll have to figure that part out.

looks like a straight pattern cam

.314 lobe lift
296 degrees advertised duration
228 degrees at .050

IO 40
IC 76

EO 76
EC 40
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Old 06-09-2007, 06:32 AM
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erson cam

I found the same cam numbers on a cam I pulled out of a 455 pontiac.I found no info also but the lift on the previous answer seems a bit low.The duration seems about right.The motor I pulled it out of was a choppy and lopey idle.
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Old 06-09-2007, 01:16 PM
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Awesome.

I ended up using another cam in my build, but it's great that there's now at least some information about this cam, the next time someone does a google search in hopes of identifying an old erson cam they found in the back of their garage : P

the blonde weasel
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Old 06-10-2007, 06:50 AM
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specs on erson cam

Hi all
After doing some extensive research I finally found the exact available specs on this erson cam.
advertised duration-316/316
duration at .50-240/240
lift with 1.5 rockers-.472
lift with 1.65 rockers-.520
lobe seperation-110 deg.
It's also a hydraulic flat tappet.The one I have is quite choppy at idle and with 11:1 flat top pistons and stock Pontiac 1967 670 big valve heads with 2.11 intake and 1.77 exhaust and no headers with a 4 speed Muncie the 1973 firebird ran not bad but my customer wanted something bigger and badder so the motor came out and redone.
Incidently the cam and lifters and the heads are up for sale.
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Old 10-03-2007, 01:41 PM
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Sig Erson cam specs part two

I am enjoying the same mystery with a Sig cam. I have a NOS cam for a Pontiac V-8, still in the box. My brother bought this cam years ago, it's supposed to be a hot street cam, great for GTO, etc. Unfortunately, the ID card is largely illegible. I know it is grind number HIR-HI (not sure if those are i's or 1's) and there is also a #315-711. I do know it is hydraulic, and either .450 or .456 lift. What I'm after is the duration at .050, overlap, lobe centers, etc. It's going into a 389 with #16 heads. Thanks!
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Old 02-23-2008, 06:59 PM
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Hi Flow 1

HI all i am from Melbourne Australia and i run a 1 H in my small block chev and it goes very well i have it in a 2 ton car and it has a 175 shot of nos and and stock smog heads it runs 11.38 at 116.94mph, but the can and lifters need to be replaced and just wanted to know where you got the grind specs for the cam hardrocker4x4, because i want to grind it in a roller hydraulic and get a bit more power out of it, would be great if you can help me out.
thanks Sam
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