tomek Posted December 18, 2022 Share Posted December 18, 2022 Intake valve dia. - 33mm, exhaust about 27 mm. Weight? Almost the same. Quote Link to comment Share on other sites More sharing options...
XXitanium Posted December 18, 2022 Share Posted December 18, 2022 What is the slowest RPM combustion engine? ...a donkey? Quote Link to comment Share on other sites More sharing options...
superhawk996 Posted December 18, 2022 Share Posted December 18, 2022 2 hours ago, tomek said: Intake valve dia. - 33mm, exhaust about 27 mm. Weight? Almost the same. The photo is non-existent. Quote Link to comment Share on other sites More sharing options...
XXitanium Posted December 19, 2022 Share Posted December 19, 2022 I think that's aupposed to be a thumbnail of what's shown below his post. Quote Link to comment Share on other sites More sharing options...
tomek Posted December 19, 2022 Author Share Posted December 19, 2022 14 hours ago, superhawk996 said: The photo is non-existent. Wut? Quote Link to comment Share on other sites More sharing options...
XXitanium Posted December 19, 2022 Share Posted December 19, 2022 I hate it when I break a thumbnail... 1 Quote Link to comment Share on other sites More sharing options...
XXitanium Posted December 19, 2022 Share Posted December 19, 2022 (edited) ...F=MA... Lobe angle? What it the acceleration at 13,000 RPMs? How much does the force change up in the thin air? . Edited December 19, 2022 by XXitanium Quote Link to comment Share on other sites More sharing options...
tomek Posted December 19, 2022 Author Share Posted December 19, 2022 22 minutes ago, XXitanium said: ...F=MA... Lobe angle? What it the acceleration at 13,000 RPMs? How much does the force change up in the thin air? . Nottin' to do at work? I can send you lift vs. crank angle data, every 5 deg of crank rotation would work for you? 😁 Quote Link to comment Share on other sites More sharing options...
jon haney Posted December 19, 2022 Share Posted December 19, 2022 (edited) Given the same stem diameter, stem length, and head diameter, how can the TI valve still weigh almost as much as a stainless valve? Is the head of the TI valve that much thicker? Personally, I would only use TI valves on intake, but I'm not a pro-stock engine builder. Wait. Is the stainless valve stem hollow, and filled with sodium? Edited December 19, 2022 by jon haney Quote Link to comment Share on other sites More sharing options...
tomek Posted December 19, 2022 Author Share Posted December 19, 2022 Why do you say diameter is same? 33mm vs. 27 mm iirc. Intakes are titanium, exhausts - SS. Quote Link to comment Share on other sites More sharing options...
XXitanium Posted December 19, 2022 Share Posted December 19, 2022 4 hours ago, tomek said: Nottin' to do at work? 😁 Lashing out at you over lunch? 😛 ...not checking yor math (calculus).. Quote Link to comment Share on other sites More sharing options...
superhawk996 Posted December 20, 2022 Share Posted December 20, 2022 3 hours ago, XXitanium said: Lashing out at you over lunch? 😛 ...not checking yor math (calculus).. Funny, but just a short duration chuckle. Quote Link to comment Share on other sites More sharing options...
XXitanium Posted December 20, 2022 Share Posted December 20, 2022 http://www.gaenssle.de/Englisch/NocBeschlVerglE.htm Quote Link to comment Share on other sites More sharing options...
XXitanium Posted December 20, 2022 Share Posted December 20, 2022 4% lighter. Quote Link to comment Share on other sites More sharing options...
tomek Posted December 20, 2022 Author Share Posted December 20, 2022 Well, exhaust valve has less lift vs. greater diameter intake. I still have my degree wheel and "clock" hooked up to the engine, Can get some numbers at opening phases of intake and exhaust. Not today though. Quote Link to comment Share on other sites More sharing options...
superhawk996 Posted December 20, 2022 Share Posted December 20, 2022 I'd never heard of KnockSoft. It sounds impressive on the surface, but from reading their stuff I'm leaning toward calling bullshit. Quote Link to comment Share on other sites More sharing options...
tomek Posted December 20, 2022 Author Share Posted December 20, 2022 Well, the goal is 16 minutes ago, superhawk996 said: I'd never heard of KnockSoft. It sounds impressive on the surface, but from reading their stuff I'm leaning toward calling bullshit. Why is it bullshit? Quote Link to comment Share on other sites More sharing options...
superhawk996 Posted December 21, 2022 Share Posted December 21, 2022 8 hours ago, tomek said: Why is it bullshit? The language strikes me as infomercial type bullshittery. And unless it's being translated from a foreign language they lack English skills which always raises my concern. Quote Link to comment Share on other sites More sharing options...
tomek Posted December 21, 2022 Author Share Posted December 21, 2022 11 hours ago, superhawk996 said: The language strikes me as infomercial type bullshittery. And unless it's being translated from a foreign language they lack English skills which always raises my concern. Nope. The text is perfectly fine and understable for someone who has a clue about basic physics. Not you obviously. Anyway, I briefly considered another engine refreshment thread with new rings, some bearings, cylinder head rework and Kent camshafts. But I had my reservations after last couple of times when some clueless idiot did his best to ruin it. So, this was basically test run. And sure enough the very same guy made his presence felt again. So, that thread won't happen, I don't have time to deal with that guy. Btw, Swamp will be here shortly. Quote Link to comment Share on other sites More sharing options...
fizzy Posted December 21, 2022 Share Posted December 21, 2022 (edited) 50 minutes ago, tomek said: Nope. The text is perfectly fine and understable for someone who has a clue about basic physics. Not you obviously. Anyway, I briefly considered another engine refreshment thread with new rings, some bearings, cylinder head rework and Kent camshafts. But I had my reservations after last couple of times when some clueless idiot did his best to ruin it. So, this was basically test run. And sure enough the very same guy made his presence felt again. So, that thread won't happen, I don't have time to deal with that guy. Btw, Swamp will be here shortly. I agree with superhawk on the tone of that link. They compare their cam with the "original manufacturer" but don't say who or what that is. Also, don't say anything about power output, flow rates, etc. Also they show what looks like valve bounce at 5000rpm on the original manufacturer and none on theirs. This means nothing, for all we know this original manufacturer cam may have a max speed of 4500rpm. Edit: when designing and valvetrain, it is always good practice to keep the "jerk" to a minimum, if you know what that is. 😎 Edited December 21, 2022 by fizzy Quote Link to comment Share on other sites More sharing options...
tomek Posted December 21, 2022 Author Share Posted December 21, 2022 1 hour ago, fizzy said: Also they show what looks like valve bounce at 5000rpm on the original manufacturer and none on theirs. This means nothing, for all we know this original manufacturer cam may have a max speed of 4500rpm. . 😎 4500 rpm limit, why anyone would wanna put a cam on car diesel engine? 😁 Text and language are perfectly fine from physics point of view. Btw, they are not exactly inventing the wheel. OEM R1 cans are assymetrical, I'll take couple pictures when get back home. Quote Link to comment Share on other sites More sharing options...
fizzy Posted December 21, 2022 Share Posted December 21, 2022 1 hour ago, tomek said: 4500 rpm limit, why anyone would wanna put a cam on car diesel engine? 😁 Text and language are perfectly fine from physics point of view. Btw, they are not exactly inventing the wheel. OEM R1 cans are assymetrical, I'll take couple pictures when get back home. You are missing our point, again. We or you, don't know what engine they are comparing to, which is why their claims of greatness are suspect. Can I presume you don't know the meaning of my reference to "jerk"? Quote Link to comment Share on other sites More sharing options...
SwampNut Posted December 21, 2022 Share Posted December 21, 2022 4 minutes ago, fizzy said: Can I presume you don't know the meaning of my reference to "jerk"? Is it something like "professional?" I also think their pitch sounds like, "But wait, there's more!" Quote Link to comment Share on other sites More sharing options...
fizzy Posted December 21, 2022 Share Posted December 21, 2022 1 minute ago, SwampNut said: Is it something like "professional?" No. Hint, it is not an insult Quote Link to comment Share on other sites More sharing options...
fizzy Posted December 21, 2022 Share Posted December 21, 2022 2 minutes ago, SwampNut said: I also think their pitch sounds like, "But wait, there's more!" Exactumundo Quote Link to comment Share on other sites More sharing options...
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