Cam and valvetrain longevity....??? low duration high lift...
#1411
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How is tim , pulling his engine apart, inspecting, taking photos, sending them to cam motion, other cam companies, randy at johnson lifters, looking into hardness checks, and posting here, in any way, poor due diligence?
Bck, i didnt see you quarterbacking the guys whos idea of due diligence, is "i called bob, he said i will be fine " or "i called cam motion, they said ill be fine" . Yea, thats pretty scientific.
Bck, i didnt see you quarterbacking the guys whos idea of due diligence, is "i called bob, he said i will be fine " or "i called cam motion, they said ill be fine" . Yea, thats pretty scientific.
#1412
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Dozens of scenerios of issues here from guys who have ran bobs cams in this thread. Some proffessional builders as well.. the guy who has dyno time only, hasnt ran them in boat to compare to anything, keeps discrediting those statements, drfending his favorite cam guy, because he hit a number on a dyno pull that he is impressed with.
Not one guy in 141 pages, has been able to answer tims question about how may hours with a 680 lift 241 cam....
Not one guy in 141 pages, has been able to answer tims question about how may hours with a 680 lift 241 cam....
#1413
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What about my post is untrue? Many people other than myself have pointed out his exhaust is a limiting factor, his carb and intake is a limiting factor, his dynoing with full accessories is lowering power. Are you saying his exact combination of parts and dyno set-up will make 700 if he changes a cam? His engines don't make 700hp for half a dozen reasons, the cam being just one of them. As far as lobe damage from the profile, well let's hear it.... This post has said very plainly that the damage has been caused by all the following reasons- improper grinding. Improper heat treating. Improper final surface polishing. Poor lobe design. Insufficient spring pressure. Improperly indexed lifter bores. Lifter wheels not squared in body. I don't even see where the extent of the damage has even been properly verified and stated yet. First the cams have grooves. Then they just have discoloration. Then they just have a funny looking surface. All these pages and I don't even see where the actual damage has even been properly assessed and stated yet let alone the cause.
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Straight bottoms and flat decks
Straight bottoms and flat decks
#1414
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I ha e posted every last little detail about my engines in and out, specs, build sheets, pics... As far as figuring out what's wrong? That's easy, heads, cams are wrong... Totally wrong... Gonna work on that this winter..what are your can specs? Please let us know so we can compare... You made such great power but inreality not much more then me if I went Dyno trim and did fast sweeps, I would love to see cam specs... Or pics of your cams after 65 hours, spring rates, and installed heights.... If cams are close to mine
Didn't say it was your fault. How exactly did I put anyone on a pedestal with my post? All I pointed out is a complete contradiction in every diagnosis that has been made. Pointing these contradictions out does not equal defending Bob. All I get from this thread is that no one really has a clue what, if anything has happened here. Maybe you should consider actually figuring out what is wrong at some point.
#1415
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How is tim , pulling his engine apart, inspecting, taking photos, sending them to cam motion, other cam companies, randy at johnson lifters, looking into hardness checks, and posting here, in any way, poor due diligence?
Bck, i didnt see you quarterbacking the guys whos idea of due diligence, is "i called bob, he said i will be fine " or "i called cam motion, they said ill be fine" . Yea, thats pretty scientific.
Bck, i didnt see you quarterbacking the guys whos idea of due diligence, is "i called bob, he said i will be fine " or "i called cam motion, they said ill be fine" . Yea, thats pretty scientific.
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Straight bottoms and flat decks
Straight bottoms and flat decks
#1416
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Cams will be sent out when ready for "precessional" diagnose, I am very busy this stuff didn't happen over days for me...
As far as 700 goals not possible with my exhaust and induction? Well maybe Bob should have said dude that won't happen, but because I was spending money he made that claim a point that it will... Want me to post that sheet again? "Expected hp and rpm" 700....@6000
As far as 700 goals not possible with my exhaust and induction? Well maybe Bob should have said dude that won't happen, but because I was spending money he made that claim a point that it will... Want me to post that sheet again? "Expected hp and rpm" 700....@6000
#1417
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I suggested pages ago that due diligence in this case would be sending the cams to cam motion and finding out directly from the manufacturer what was wrong and what the likely cause was. It was you that said matter of factly that Cam Motion could not be trusted to diagnose their own cam.
He also called cam motion last year, and was reassured he will be fine. And yet, here we are.
He was willing to deal with a slower boat, if it ran good and was reliable. Now , he has not only a slower boat, but an unreliable one as well.
Did you gain speed with your new builds in the boat ?
#1418
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I ha e posted every last little detail about my engines in and out, specs, build sheets, pics... As far as figuring out what's wrong? That's easy, heads, cams are wrong... Totally wrong... Gonna work on that this winter..what are your can specs? Please let us know so we can compare... You made such great power but inreality not much more then me if I went Dyno trim and did fast sweeps, I would love to see cam specs... Or pics of your cams after 65 hours, spring rates, and installed heights.... If cams are close to mine
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Straight bottoms and flat decks
Straight bottoms and flat decks
Last edited by bck; 10-14-2016 at 10:57 AM.
#1419
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I have not blamed Tim for any of his engines problems in any of these multiple threads he has started recently. I have not defended Bob in any of these recent threads. I've done nothing but offered helpful advice to the extent I'm able based solely on my limited dyno experience with my combination of parts. Reading comprehension is a strong point of mine and I stand by my above post that nothing here has been properly diagnosed yet and virtually every cause under the sun has been put forth .
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Straight bottoms and flat decks
Straight bottoms and flat decks
#1420
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People keep bringing up my power and my parts and if I will have problems after 100 hours. That's just deflection. My engines and what problems and power I might make has absolutely nothing to do with what is wrong with Tim's engines. My engines may or may not last and might only make 600hp. That doesn't change the fact that the damage to Tim's engines has not yet been accurately assessed and stated in this thread.
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Straight bottoms and flat decks
Straight bottoms and flat decks