Rod Bolt Failure
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Teching In
Joined: Dec 2006
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Rod Bolt Failure Through reading and speaking with several reputable tuners, I am beginning to wonder if the rod bolt failure thing is a myth. The older design rod bolts were indeed a weak link, but the later design on the ls1/ls6 dosen't seem to be a problem. I see everyone jumping on the bandwagon and saying change your rod bolts.
So if you have indeed had a rod bolt failure on the later design rod bolt lets hear about it. If you have abused your stock bottom end with stock rod bolts lets hear about it too.
Maybe include RPM's turned, what power, what power adder, and at how many miles they let go or haven't let go.
So if you have indeed had a rod bolt failure on the later design rod bolt lets hear about it. If you have abused your stock bottom end with stock rod bolts lets hear about it too.
Maybe include RPM's turned, what power, what power adder, and at how many miles they let go or haven't let go.
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On my 2002 motor, I saw 7200rpm on a monster cam and 200+ shot every day for 2 years. When it finally came apart, it seems as if the rod stretched itself apart from rpm.... all rod bolts were intact.
Originally Posted by Jantzer98SS
98 with 500+ 1/4 passes, 200+ in the low 11's high 10's, stock shortblock, 6800-7000 rpm shifts. Never a problem.
The motor is out, and has katech's in now.
The motor is out, and has katech's in now.
Originally Posted by Hocky
On my 2002 motor, I saw 7200rpm on a monster cam and 200+ shot every day for 2 years. When it finally came apart, it seems as if the rod stretched itself apart from rpm.... all rod bolts were intact.
Originally Posted by deeloc1
were you using stock pistons for the 200+ shot?...curious because i want to know my limits...i have a 2002 ls1 out of a SS.
I was up to a 275 shot on the stock pistons, didn't hurt them a bit.
Originally Posted by Hocky
I was up to a 275 shot on the stock pistons, didn't hurt them a bit.
Daaaaaaaaaaaaaamn! you've got nuts...you must have had a tune out of this world! where you running a ls6 or fast? i'm thinking with a 275 shot you probably used the carb intake or a sheet metal intake??? What n2o set up were you running and how big was the cam you were using?...i'm interested to know how much rwhp/tq you were running with?!
Originally Posted by Hocky
I was up to a 275 shot on the stock pistons, didn't hurt them a bit.
Im not that brave.Ill stick with a 75-100 till i forge it
Originally Posted by deeloc1
Daaaaaaaaaaaaaamn! you've got nuts...you must have had a tune out of this world! where you running a ls6 or fast? i'm thinking with a 275 shot you probably used the carb intake or a sheet metal intake??? What n2o set up were you running and how big was the cam you were using?...i'm interested to know how much rwhp/tq you were running with?!
I was running an LS6 manifold. The nitrous kit was pieced together from all over, but it was a single nozzle wet set up. I was flowing it all through the intake mani without problems, but I was using a progressive controller to keep the hit soft. I have no dyno numbers, I do all of my tuning (and most of my playing) on the street. My car did trap 138mph on a 150 hit and ran dead even with a car that went 144 on 200 with a ~3000lb race weight. It was doing ok. Never saw any track time on the bigger shots. It finally came apart around 7krpm in 4th gear one night on a motor only pull. Never really had any detonation problems, did everything on pump gas. Burned one plug, but that is as bad as it was until what I have to assume was rpm finally killed the motor.
Originally Posted by Treed Ya
Through reading and speaking with several reputable tuners, I am beginning to wonder if the rod bolt failure thing is a myth. The older design rod bolts were indeed a weak link, but the later design on the ls1/ls6 dosen't seem to be a problem. I see everyone jumping on the bandwagon and saying change your rod bolts.
So if you have indeed had a rod bolt failure on the later design rod bolt lets hear about it. If you have abused your stock bottom end with stock rod bolts lets hear about it too.
Maybe include RPM's turned, what power, what power adder, and at how many miles they let go or haven't let go.
So if you have indeed had a rod bolt failure on the later design rod bolt lets hear about it. If you have abused your stock bottom end with stock rod bolts lets hear about it too.
Maybe include RPM's turned, what power, what power adder, and at how many miles they let go or haven't let go.
However, I do agree with you that the later model (upgraded) rod bolts do have the ability to handle a lot more HP without failure. I would like to know the the PSI specification of the old rod bolts vs the upgraded version - I bet there is a considerabe difference in the two.