HP limit of ARP bolted stock rods?
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Re: HP limit of ARP bolted stock rods?
I don't know that I would go with Eagles. I have heard several conflicting stories as to their durability. Why not spend the extra couple of hundred and go with Manley, Lunati or Crower.
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Re: HP limit of ARP bolted stock rods?
do eagle rods come with ARP bolts (think they do)?
The H-beam (~$600) say they are good up to 500 hp.....H/C cars are close to 500 crank (400+wrhp).....so that does not seem like they are worth the money (unless I'm missing something)....
The H-beam (~$600) say they are good up to 500 hp.....H/C cars are close to 500 crank (400+wrhp).....so that does not seem like they are worth the money (unless I'm missing something)....
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Re: HP limit of ARP bolted stock rods?
Is that bolt that comes with the rod strong enough? Are the other ones overkill for a smaller hp application?
#25
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Re: HP limit of ARP bolted stock rods?
If you're planning to use a power adder, it's cheap insurance to upgrade the bolts.
chris
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Re: HP limit of ARP bolted stock rods?
I've seen Eagle rods with the L19 bolts used successfully in traditional Pontiac stroker engines producing 900+ hp.
the only logical upgrade from these IMO are the Olivers, and at 1200 a set, i opted to settle with the eagles and be able to run pistons in my motor too
i'd even go with a set of crowers if you didnt plan on spraying that much. just cheap insurance really. but then again, i like to stretch the limits too.
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Re: HP limit of ARP bolted stock rods?
If you're planning to use a power adder, it's cheap insurance to upgrade the bolts.
#28
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Re: HP limit of ARP bolted stock rods?
I'd be interested in how you have ascertained that bolts are inportant for compressive force (cylinder pressure).
According to Kenny Duttweiler and other engine builders that I spoke to re: a 434 ci twin turbo bowtie block SBC I was building, turbo motors stess the bolts less due to the force that the piston/rod must use to push out exhaust gasses at high boost. These forces counteract the normal tensional forces of piston decel/accel at the top half of the cylinder, though I do not understand if they implied partially or completely at what RPM.
We built the engine using Oliver SuperDuty I-beam rods but stuck with the cheaper bolts. I was willing at the time to pay the $300 for the better bolts, but he felt they were only necessary in cases of over 8000 rpm. He said the bolts (within limits) were not an issue for 1700 horsepower and 35 psi boost.
Another example is the GMC Syclone I spent too much money on for a few years. The rods were standard L98 with standard GM L98 bolts. (the 4.3 was quite literally 3/4 of an L98). The crankshaft was an issue at 500+ hp but hte rods never were (the tranny shifted at 5500 rpm.)
According to Kenny Duttweiler and other engine builders that I spoke to re: a 434 ci twin turbo bowtie block SBC I was building, turbo motors stess the bolts less due to the force that the piston/rod must use to push out exhaust gasses at high boost. These forces counteract the normal tensional forces of piston decel/accel at the top half of the cylinder, though I do not understand if they implied partially or completely at what RPM.
We built the engine using Oliver SuperDuty I-beam rods but stuck with the cheaper bolts. I was willing at the time to pay the $300 for the better bolts, but he felt they were only necessary in cases of over 8000 rpm. He said the bolts (within limits) were not an issue for 1700 horsepower and 35 psi boost.
Another example is the GMC Syclone I spent too much money on for a few years. The rods were standard L98 with standard GM L98 bolts. (the 4.3 was quite literally 3/4 of an L98). The crankshaft was an issue at 500+ hp but hte rods never were (the tranny shifted at 5500 rpm.)
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Re: HP limit of ARP bolted stock rods?
If you "stretch" a rod bolt from spinning Rpms too high, and get that "loose rod" sound, is it possible to go in, replace the bolts and be good, or is there more damage than needing new bolts?
Has anyone just replaced the bolts in this situation or no?
Has anyone just replaced the bolts in this situation or no?
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Re: HP limit of ARP bolted stock rods?
tell me if im wrong but i feel that its the RPM that would kill ur rods. When the power hits the rods it is always pushing them down which i believe has little to do with the rods but when the piston is being pulled down after the compression stroke it is just the rod cap and bolts pulling the rod back down i think that that is mainly what kills rod bolts.
I hope that makes sense
I hope that makes sense
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Re: HP limit of ARP bolted stock rods?
I never stated that turbo motors weren't easier on rod bolts. I stated that I have never heard that. As for combustion pressure, I'm just thinking out loud. Not that I'm disputing the "experts".....it just doesn't seem totally logical to me. I experienced ARP 2000 rod bolt failure in a blown small block Ford (at relatively low RPM).
As for my statement regarding rod bolts in relation to power output, I'm basing this on my experience with traditional Pontiac engines. These engines rely heavily on torque, and in most street/strip applications the work is done by 6,000 RPM. The stock bolts are adequate for stock applications, but as hp levels rise (within the same RPM limit) rod and bolt failures become increasingly common.
I certainly wouldn't build a heads/cam/bolt-on/nitrous LS1 with standard issue Eagle bolts. The cost of the bolt upgrade is insignificant when compared to the cost of replacing the engine.
As for my statement regarding rod bolts in relation to power output, I'm basing this on my experience with traditional Pontiac engines. These engines rely heavily on torque, and in most street/strip applications the work is done by 6,000 RPM. The stock bolts are adequate for stock applications, but as hp levels rise (within the same RPM limit) rod and bolt failures become increasingly common.
I certainly wouldn't build a heads/cam/bolt-on/nitrous LS1 with standard issue Eagle bolts. The cost of the bolt upgrade is insignificant when compared to the cost of replacing the engine.
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Re: HP limit of ARP bolted stock rods?
If you "stretch" a rod bolt from spinning Rpms too high, and get that "loose rod" sound, is it possible to go in, replace the bolts and be good, or is there more damage than needing new bolts?
Has anyone just replaced the bolts in this situation or no?
Has anyone just replaced the bolts in this situation or no?
I heard the noise, wondered what it was, and 6 seconds later, I found out, as did track officials and the crew that had to clean the track.
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Re: HP limit of ARP bolted stock rods?
I certainly wouldn't build a heads/cam/bolt-on/nitrous LS1 with standard issue Eagle bolts.
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Re: HP limit of ARP bolted stock rods?
I certainly wouldn't build a heads/cam/bolt-on/nitrous LS1 with standard issue Eagle bolts.
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Re: HP limit of ARP bolted stock rods?
just a matter of opinion i guess.. ;D we'll see how she does. im sure the 250 shot will hold, but im kinda hesitant to do the 300.