steve baker
Moderator
Actually a Briggs fires every revolution. Did you ever wonder why the intake port has some carbon residue in it right under the intake valve.
Actually a Briggs fires every revolution. Did you ever wonder why the intake port has some carbon residue in it right under the intake valve.
aluminum fatigues. ask a top fuel mechanic how often the aluminum rods are replaced. doesn't matter about a replaceable bearing or what oil was used.I h
I have rods in flatheads that's been run for years like Mr Carlson said, I have S/A animals and small block opens, with the same rods for 3 years now, just change the bearings every 6-8 races, I guess it depends on oil and how often you change it also.
we not quite at top fuel HP yet, some people way over think these little engines, with spread sheets, calculations, formulas, us older guys put engines together with what we know works, in many years of racing I can count on one hand or so, how many engines we blew and it still works just fine today.aluminum fatigues. ask a top fuel mechanic how often the aluminum rods are replaced. doesn't matter about a replaceable bearing or what oil was used.
ARC does a lot of stupid things to their rods such as leaving all the tool paths on the surface and carving their logo and information into the rod itself. these are stress risers and would make any mechanical engineer cringe. the rods would benefit from being polished and shot peened like the horseman rods were done. I do like they use the proper I beam profile and not that H beam abomination.
there are stock rods in 5hp briggs flatheads on log splitters and generators that have done a fair deal more than 3 years.
Because they are over built and heavy. Carillo invented these things because they are easier to machine.The old Horstman H-beams were practically indestructible. I bought this rod around 1993. I don’t think I’ll run it again, lol, but it didn’t bend or break.
Actually a Briggs fires every revolution.
The actual comment was: " it provides some cushion for the explosion that happens 10,000 X per minute in a limited." so my original question about a 20,000 rpm limited still stands.Actually a Briggs fires every revolution.
he said " it provides some cushion for the explosion that happens 10,000 X per minute in a limited." My math tells me that's 20,000 rpmhe
he said 10,000.
You can't be serious in your critique of my writing about the number of revs and firing events in a limited. I guess, like you, I could have enlightened everyone with my vast knowledge and experience of the overlap firing of a 4 stroke Briggs. You are absolutely correct. The number of times it fires is twice that of the rpm read on the tach. BUT, the number of times the plug fires was not my point at all, it was the excessive rpm we turn these engines and subsequent load the rod bearing needs to endure.he said " it provides some cushion for the explosion that happens 10,000 X per minute in a limited." My math tells me that's 20,000 rpm
I knew exactly what you meant. I was just messing with you.You can't be serious in your critique of my writing about the number of revs and firing events in a limited. I guess, like you, I could have enlightened everyone with my vast knowledge and experience of the overlap firing of a 4 stroke Briggs. You are absolutely correct. The number of times it fires is twice that of the rpm read on the tach. BUT, the number of times the plug fires was not my point at all, it was the excessive rpm we turn these engines and subsequent load the rod bearing needs to endure.
And for what it's worth, if I could turn a limited 20,000 rpm and it still live, you know darned well we'd all be doing it!
mine fires 31 degrees before tdc on overlap. My in valve opens at 60 degrees btdc. On over lap. Is it waisting any air and fuel coming in? How much cfm is there between 60 degrees btdc @ .006 lift? Versus 16 degrees btdc @ .050 lift?Actually a Briggs fires every revolution.
If it sparks on overlap does it waist any in coming fuel air charge?Actually a Briggs fires every revolution.
Actually a Briggs fires every revolution.
YesIf it sparks on overlap does it waist any in coming fuel air charge?