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#1
09-08-2018, 05:23 PM
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Broken Scorpion rocker
Been racing Pontiacs since the 80s and I’ve never broke a rocker arm. I know it happens but I gues I’ve been lucky. Put a set of 1.65 Scorpians on 12 passes ago and it broke in half on my last time trial. I’ve always run Comp Cam in the past. Has anybody else had an issue with them or is it just bad luck?
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#2
09-08-2018, 05:32 PM
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We've seen a LOT of them break.... but they have a lifetime warranty.
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#3
09-08-2018, 05:58 PM
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Do a search, some have some have not. I had 1.50 ratio 250 seat 600 open, no issues for 2 years. When I upgraded my heads I went with crower SS enduro.
Those are supposed to be the best before a shaft set up. Where did it break? Some crack across the roller area, I do think checking push rod length and real good geometry are important to rocker life. |
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#4
09-08-2018, 10:42 PM
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It broke right in the middle where it’s the thickest
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#5
09-08-2018, 10:43 PM
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I may be changing......
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#6
09-08-2018, 10:44 PM
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I would...never buy a part based on warranty
... a set of comp or Crower steel rockers will do you well... |
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#7
09-08-2018, 10:47 PM
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Jim I had a set I ran for 8-10 yrs never a problem until I had one go bad .called the company replaced the whole set for free .. Lift is around 750 plus
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#8
09-08-2018, 11:17 PM
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Harland Sharp. Crower only ones I use lately
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2008KRE Q16 Winner 2014 atco raceway doorslammer winner 86 grand am tube car 8.95 @152 455 eheads solid flat tappet cam Hoffman Racing building and racing Pontiacs for 35 years |
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#9
09-09-2018, 08:54 AM
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These were on my new HP heads with lift at .726 and never over 7200 rpm
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#10
09-09-2018, 08:55 AM
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Quote:
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#11
09-10-2018, 08:02 AM
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Quote:
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#12
09-10-2018, 08:36 AM
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Paul, I’m switching to the Crowers. I’m going to sell these and my ultra golds to help cover the cost.
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#13
09-10-2018, 09:49 AM
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I run Crower 1.5 aluminum with 240# seat and 720# open without issue. They are very robust.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#14
09-10-2018, 08:12 PM
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Pics
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#15
09-10-2018, 08:30 PM
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Anything but Scorpian. Warranty won't help with residual damage. Crower my 1st choice. Experienced companies like Harland Sharp, Comp, Crane. Push rods Smith.
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#16
09-10-2018, 08:34 PM
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I would trash the scopians and get a good set of rockers... no need to risk catastrophic failure over a few hundred bucks...
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#17
09-10-2018, 08:50 PM
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I’m going to buy the Crower Endura rockers. I agree with not worth the risk. I’ll sell the Scorpian and Ultra Golds later and recoup the price
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#18
09-10-2018, 09:48 PM
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Quote:
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#19
09-10-2018, 10:08 PM
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Not sure. I’ll check tomorrow. I got them from KRE with the High Ports
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#20
09-10-2018, 10:21 PM
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Quote:
 , go figure. I know of a set of race series with Nextec springs and @ .765 lift went at least 4 years 3 of the years in a boat.
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