crower rods - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 6 (permalink) Old 07-06-2008, 12:59 AM Thread Starter
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crower rods

i have seen crower offers upgraded rod bolts or the standard h-11 and you can get the oiling hole from the big end of the rod to the pin.can any of our sponsors or racer tell me which rod is preffered.

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post #2 of 6 (permalink) Old 07-06-2008, 01:02 AM
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Re: crower rods

Talk to David Lott (Powerstroke Racer) at DI. He deals with the Crowers all the time.

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post #3 of 6 (permalink) Old 07-06-2008, 03:21 AM
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Re: crower rods

H-11 rod bolts will be much more than adequate. Rod bolt failures are caused by engine RPM not torque. With these motors spinning less than 5k rpm, the bolts that are in there are over-kill.

Pin oiling is not something to worry about either, the piston squirters do a very good job of keeping that area lubricated and wear is very minimal at rebuild time.

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post #4 of 6 (permalink) Old 07-06-2008, 07:44 AM
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Re: crower rods

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Originally Posted by Machinist View Post
H-11 rod bolts will be much more than adequate. Rod bolt failures are caused by engine RPM not torque.

So 1000lbs torque at 3000rpm is the same as 1000lbs of torque at 3800rpm? **baits Charles**

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ALSO LOTS OF HELP FROM (IN NO PARTICULAR ORDER) TWISTED DIESEL PERFORMANCE, FCDP, ITP, MATT WITH GEARHEAD, ERIC WITH INNOVATIVE, DOUG WITH GOGO DIESEL, CASS WITH FULL FORCE DIESEL, AND SWAMP'S

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post #5 of 6 (permalink) Old 07-06-2008, 08:25 AM
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Re: crower rods

Quote:
Originally Posted by imelmo View Post
So 1000lbs torque at 3000rpm is the same as 1000lbs of torque at 3800rpm? **baits Charles**
I have not seen Charles post anything that I would disagree with

I should explain a little further - in compression(torque applied in power stroke) there is little force exerted on the rod bolts, it's the weight of the piston being stopped at TDC that pulls the big end of the rod into an oval shape(exaggerated) that puts tensile force on the rod bolts - this force is multiplied as rpm increases. Now if you want to bring the beam and shoulders of the rods into the equation the forces act in both directions and is more related to torque applied.

Rod Finite Element Analysis

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post #6 of 6 (permalink) Old 07-06-2008, 09:38 AM
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Re: crower rods

i like that illustration.

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