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Re: Aluminum rod, How many runs?
[Re: BigDog68Dart]
#593876
01/25/10 08:41 PM
01/25/10 08:41 PM
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Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
roadhazard
master
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master
Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
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I have BME's in mine. I asked the same question at Ken Veney's shop the other day and they said if you're thinking about them it's time replace them.  I've been thinking about mine for a while  I'll have to wait til next year  There was a thread on here about who runs aluminum rods on the street and someone posted some good info from BME's site. FWIW
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Re: Aluminum rod, How many runs?
[Re: roadhazard]
#593877
01/25/10 10:06 PM
01/25/10 10:06 PM
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Joined: Jun 2009
Posts: 644
Minnesota
Barnstorm
mopar
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mopar
Joined: Jun 2009
Posts: 644
Minnesota
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Maybe newer alum rods are better nowdays,but windowed a block years ago with BME's after 175 hits. Current engine builder insisted on GOOD steel rods[C&A] and ok after 2 builds and 10 years. 820hp and 7800rpm. Your results may vary.
The little old lady from Pasadena is back!
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Re: Aluminum rod, How many runs?
[Re: BigDog68Dart]
#593879
01/25/10 10:20 PM
01/25/10 10:20 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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It will have a few factors but weight of the piston and the rpm BUT I was told 600 runs then measure them and that was in a higher rpm set up than yours 
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Re: Aluminum rod, How many runs?
[Re: atoetly]
#593881
01/25/10 11:43 PM
01/25/10 11:43 PM
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Joined: Aug 2003
Posts: 4,670
On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,670
On the parachute mount
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i hAve taken two set out at 200 passes and they measure the same as they went in.....BUT they can let go when you least expect . Im using nitrous, you are running NA? Prob can get one more season on them  Also which ones do you have?? I get the best ones with the larger bolts in them, they are pretty beefy and seem to last a while. 1fastmopar puts a ton of passes on his, def more than 200....
....BAD A$$ STREET CAR.....
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Re: Aluminum rod, How many runs?
[Re: atoetly]
#593883
01/25/10 11:59 PM
01/25/10 11:59 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
No power adders here. And even though I don't much care for elvis his experience with GRP rods has me sold on them.
I got a set of GRP alum rods for my BB B1 M/C engine
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Re: Aluminum rod, How many runs?
[Re: MR_P_BODY]
#593884
01/26/10 12:02 AM
01/26/10 12:02 AM
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Joined: Jun 2009
Posts: 644
Minnesota
Barnstorm
mopar
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mopar
Joined: Jun 2009
Posts: 644
Minnesota
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Can't wait to try my new aluminum crank....LOL
The little old lady from Pasadena is back!
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Re: Aluminum rod, How many runs?
[Re: Barnstorm]
#593885
01/26/10 12:12 AM
01/26/10 12:12 AM
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Joined: Aug 2003
Posts: 4,670
On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,670
On the parachute mount
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a guy that races in the same class as me has a BB Chevy, GRP's...they have over 500 passes on them, ALL with nitrous, and some have been in the 7.70 range so you know he is getting after it sometimes.
....BAD A$$ STREET CAR.....
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Re: Aluminum rod, How many runs?
[Re: 340B5]
#593887
01/26/10 09:38 AM
01/26/10 09:38 AM
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Joined: Jun 2004
Posts: 1,226
Peoples republic of clackamas ...
atoetly
pro stock
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pro stock
Joined: Jun 2004
Posts: 1,226
Peoples republic of clackamas ...
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Quote:
Quote:
Can't wait to try my new aluminum crank....LOL
Plastic is the way to go...top secret stealth bomber stuff  I've always heard 500 on alum rods.
I wonder if they can nitrid that plastic stuff? Make it even more unobtanium. 
Now back to reality. When I spoke with someone from GRP he told me that when they tested their rods the failures where always the bolts. And these are the finest arp bolts made.
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Re: Aluminum rod, How many runs?
[Re: atoetly]
#593888
01/26/10 11:24 AM
01/26/10 11:24 AM
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Joined: Jan 2003
Posts: 6,314
The Swamp
MegaDart
master
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master
Joined: Jan 2003
Posts: 6,314
The Swamp
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Quote:
Current engine builder insisted on GOOD steel rods[C&A] and ok after 2 builds and 10 years. 820hp and 7800rpm. Your results may vary.
I would certainly listen to him!! 
Although I think you are ok bigdog I would say 400 passes about max, or 3 years. I don't like aluminum, always afraid they will break and results are catastrophic. Over rev and they stretch. Not gonna happen with steel.
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Re: Aluminum rod, How many runs?
[Re: MegaDart]
#593889
01/26/10 12:46 PM
01/26/10 12:46 PM
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Joined: Mar 2008
Posts: 307
OH
TheBlackCar
enthusiast
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enthusiast
Joined: Mar 2008
Posts: 307
OH
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GRP is good stuff. The life of the rod is going to depend on the rod-ratio, what your swinging, and the end user. I wouldn't worry at 250 passes unless the ratio is way short and/or you make a habit of beating on the motor cold. But, 500-600 passes are not equal in all applications either. As for the other comments, I have seen an aluminum crank and plastic connecting rods.  Good Luck
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