Rod Breakage

Diesel Tech said:
Rob

Don't you change the program to lower power output when not racing? Like I said there is no hard fast number but useing the power wisely helps alot when it comes to expeceted life of the parts.
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Yes Steve, I do run a tow tune for most of my street driving, guessing it's a 75hp tune.
 
Burner said:
:poke: Is this a pissing contest?

The "Safety Margin" is declaired @ 450 HP on # 2 Diesel......It is the LOWEST point at which a rod could break. I think we have all seen Wades 800+HP, Tomac's 600+, Brandon's 700+, Tony's 500+, Nathon's 550+, Kennedy's 500+ and Bucks stooopid power on stock rods. It's how you feed it that keeps the engine/rods alive. Keep a stock motor @ 450 HP for 100k miles pull'n, racing and pulling heavy trailers and then tell me 500, 600 or 700 is no problem.:stab:
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This is the point I was trying to make, running it for X Hp for how long. Most of the hotrods only see high power for short burst then it's back down to low power just as Rob does, useing the power wisely. If you run hard all the time and push the envelop it's going to byte you.
 
The failures, are they up near the wristpin or down by the buttcap? Just curious.
 
Micheal Tomac said:
I've been above 600 rwhp for the last two seasons and above 500 rwhp for the previous two seasons before that. The truck has over 200 hooks and over 200 passes at the drag strip with the stock rods.
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come on Mike the michigan rumor mill says your on motor #5:lolly:
 
Eric.......where are ya? :bow:


Timbeaux, I think most are 2/3 up the rod or just off the pin from what I understand.
 
Most rod failures are from the rod bending in the beam area. You will find that most all blocks with a window in them are from the front cylinders or the rear cylinders. The reason for it is simple, when the rod bends it hits the counterbalance weight. At that point all hell breaks lose. The reason you do not see the rods out of the middle is there is little to no counter balance weight in that area so the rod has to break there. Most cases are the rod bends, the counter balance hits it and breaks the rod and piston off and sends it out the side of the block. In any case it gets expensive quick when it happens.
 
Thinking out loud here... Why not go to a knife edged crank with a lightned(sp?) rotating assembly? I'm assuming that the rods can't be made to reduce the amount of deflection enough to clear the stock counterweights?

bnradon.
 
If the rod beats the snot out of the wall and doesn't make a window..... it's toast anyway. Those are throw-away blocks.
 
Burner said:
If the rod beats the snot out of the wall and doesn't make a window..... it's toast anyway. Those are throw-away blocks.
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I was thinking that the rod deflection wouldn't have as much impact if the crank could take a little bit more deflection from them??

brandon.
 
The 'Bridge' or crank might take it, might not. I'd hate to toss 8,000 bucks at a motor with a bad crank.:doh:

It's almost like re-using cap bolts.....maybe they'll hold, maybe not? I'll bet they'll work but not for me, Murphy follows me. LOL
 
i would say the biggest factor is cylinder pressures, adding lp, water, or their combination can even have a tole on a 400hp motor... nitrous in moderations can work(just air)....

now just run diesel and big turbos, you will see more and more guys are making over 600hp with out problems to the rods, time will tell i guess

rods are not cheap, and only tts now sells them, so it is what you what from your motor that makes best sense to me
 
Look at the LBZ............. GM beefed up the rods just to ad 45 Hp. Does it make sense to add 300 Hp and expect them to live a long life?
 
fredw said:
i would say the biggest factor is cylinder pressures, adding lp, water, or their combination can even have a tole on a 400hp motor... nitrous in moderations can work(just air)....

now just run diesel and big turbos, you will see more and more guys are making over 600hp with out problems to the rods, time will tell i guess

rods are not cheap, and only tts now sells them, so it is what you what from your motor that makes best sense to me
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Rods are available elsewhere, you just have to know the right people........:woohoo:
 
RIDGE_RUNNER said:
Rods are available elsewhere, you just have to know the right people........:woohoo:
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You're not allowed to make statements like that without letting us know who. :fish:

brnadon.
 
joefarmer said:
You're not allowed to make statements like that without letting us know who. :fish:

brnadon.
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I have inquired here about becoming a Supporting Vendor, once I get the pricing information then I will say more. I do not want to violate site rules.........

Pricing will be less than current offerings from other vendors........:welcome:

As soon as the administrators here get me the information I will post more about it.

T:aiwebs_027: NY
 
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