Rod bolts, main caps, and what not.
11-29-2014, 10:22 AM
#11
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It's probable that the S/C motor has heavier piston, pins, and connecting rods....so I say yes...I better bolt would be required than the N/A, unless of course the N/A version is equipped with same weight items for some reason.
Also, (thinking out loud) I would think that the S/C engine would be more likely to have higher spikes in rpm if the prop leaves the water, coupler or drive breaks, or etc. I may be wrong on that one....but seems more probable to me. I don't leave the water much.....so no real experience there. This is where offshore racers could tell us.
A non loaded engine spiking high in rpm has to be murder on rod bolts.
Also, (thinking out loud) I would think that the S/C engine would be more likely to have higher spikes in rpm if the prop leaves the water, coupler or drive breaks, or etc. I may be wrong on that one....but seems more probable to me. I don't leave the water much.....so no real experience there. This is where offshore racers could tell us.
A non loaded engine spiking high in rpm has to be murder on rod bolts.
11-29-2014, 10:23 AM
#12
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11-29-2014, 10:28 AM
#13
I go to bed way to early and miss all the fun...I now have a headache from 2 hours of reading the other thread.
I am currently working with Bob on (2) 572 builds, they are fuel injected, Dart big M's, AFR, dry sump with a goal of 850+ at just over 6000 RPM. The rods are Callies Ultra's they use a AMS 6487 modified tool steel bolts marked as "ULTRA 180 (or 160 hard to tell) ARP 14D (or 140 again hard to tell even with my 250's on) where do these fall in the line of rod bolts to use or not. I am no engineer but more of a hands on builder with some good tools, my wife is beautiful even at 53 years old and I also was a firefighter in my youth.
I am currently working with Bob on (2) 572 builds, they are fuel injected, Dart big M's, AFR, dry sump with a goal of 850+ at just over 6000 RPM. The rods are Callies Ultra's they use a AMS 6487 modified tool steel bolts marked as "ULTRA 180 (or 160 hard to tell) ARP 14D (or 140 again hard to tell even with my 250's on) where do these fall in the line of rod bolts to use or not. I am no engineer but more of a hands on builder with some good tools, my wife is beautiful even at 53 years old and I also was a firefighter in my youth.
11-29-2014, 10:39 AM
#14
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Although I have never done the research and got down to the nitty gritty of rod bolts I have always been under the assumption that as the rpm's go up so does the quality of the rod bolt. It has nothing to do with horsepower. Also, for what it worth my builder said the L19's are junk and doesn't use them in anything. I didn't ask him why cause I really didn't care to know. Myself I don't like h-beam rods I-beams give a little more protection when you are dealing with detonation.
11-29-2014, 11:01 AM
#15
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Wouldn't the n/a motor be pulling harder on the intake stroke than the forced induction? On the upstroke the crank and mains are bearing the load with the caps along for the ride? No?
11-29-2014, 11:16 AM
#17
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boost tends to want to rip the **** out of rod bolts, rods, wrist pins, pistons...we use K1 Billet rods with ARP bolts on my Turbo LS Drag Car...just all depends on the boost level..we run 25+, but only 6 with the procharger in the boat..Alex can tell you at length whats going on with boost....
11-29-2014, 11:23 AM
#18
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the higher horsepower rod bolts need to be stronger.rpm is rpm,,but the combustion pressure is what accelerates the crank back down.
11-29-2014, 11:24 AM
#19
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I go to bed way to early and miss all the fun...I now have a headache from 2 hours of reading the other thread.
I am currently working with Bob on (2) 572 builds, they are fuel injected, Dart big M's, AFR, dry sump with a goal of 850+ at just over 6000 RPM. The rods are Callies Ultra's they use a AMS 6487 modified tool steel bolts marked as "ULTRA 180 (or 160 hard to tell) ARP 14D (or 140 again hard to tell even with my 250's on) where do these fall in the line of rod bolts to use or not. I am no engineer but more of a hands on builder with some good tools, my wife is beautiful even at 53 years old and I also was a firefighter in my youth.
I am currently working with Bob on (2) 572 builds, they are fuel injected, Dart big M's, AFR, dry sump with a goal of 850+ at just over 6000 RPM. The rods are Callies Ultra's they use a AMS 6487 modified tool steel bolts marked as "ULTRA 180 (or 160 hard to tell) ARP 14D (or 140 again hard to tell even with my 250's on) where do these fall in the line of rod bolts to use or not. I am no engineer but more of a hands on builder with some good tools, my wife is beautiful even at 53 years old and I also was a firefighter in my youth.
also,,what size throttlebody?
11-29-2014, 11:28 AM
#20
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