http://www.youtube.com/watch?v=gqYs2R4Ks1U from what a read it has a 4.00 bore and a 2,745 stroke. Can a sbc rev that hard without exploding?
knife edged and lightened crank...chaffered holes etc?!? Dont know about the stroke though...anything is possible...but why!
I think its a category that limits displacement/weight ratio, so the guy stretches it with crazy revving I guess
I find it hard to believe. 10k I could understand. Cup cars run in the 9k range during racing. Prostock motors are around 10k. F1 cars use pneumatic valve trains and are in the 15k-17k range depending on who you believe. The big concern is reciprocating weight versus speed.
If I fit a destroker kit on any engine it will rev harder as long the engine holds itself together? I'm a rev junkie *hides in trench*
that is how it was done before bracket racing if it's not fast enough just build a bigger motors.we just built the smallest possible the make the lightest weight to make the class and run up to 7.17 gears and turn it tight
Way back when we ran a de stroked 265...233 cubes...turned it 9800 in the lights...sounded great..........F/Gas............in a 55 of course. when ya gotta, just buzz the hell out of em and hang on. M.
I have heard of bracket racers twisting Ford 352's up over 8000 rpms. That is with a 4" bore and 3.5" stroke. So a 4" Bore with 2.745" stroke at 10K+ is credible. The limitation will be to keep the valve springs from floating. Better have some heads that flow like crazy too. F1 engines go to 19,000 rpm with a 3.858" bore and 1.563" stroke. With the short stroke, the piston speed stays at manageable rates, and you don't need super strong (i.e. heavy) con rods.
I saw the tell-tale in Ronnie Wongs old C/MP Corvette sitting at close to 11,000 after a pass in the pits at Mission back in the late '70s. That was a 302.
I twisted my 314 sbc to 11,000 all the time. That was in the early 70's. Got to ring em out if you want to win.
Absolutely credible. Usually a engine that turns as good as this one will bump the rev limiter. Dude can DRIVE! peace
well its all about piston speed really, if you had a strong enough rotating assembly, and heads / cam that could flow that kind of crazyness you could. but still why?
Had a 406 years ago built by Dennis Mitchell in Ala,turned 10,000 but it was hard to get used to doing it like that!!
In high school webuilt a destrocked sbc, 280", would spin 12,000 easy but everything went squishy at 13 grand. Knife edged crank, rifle drilled crank, dry sump, Enderle fuel injection on a tunnel ram, super light H beam rods, forged pistons gas ported and lightened as much as possible. That's the key keeping components as light as possible without taking the strenghth out of them and balancing. Balancing opens a whole other can of worms. Some builders like to go for perfect balance and others preffer to build in a certain degree of imbalance. I follow the latter as I believe that a slight imbalance can eliminate/ reduce harmonic effect giving a few extra rpm & hp. These things are on the absolute ragged edge and don't even start makin' #s til 6000+ rpm and the actual peak power #s are all in about a 500rpm window from 11500 to 12000. They run like a mini top fuel mill suckin in so much fuel they nearly hydro lock. Last one I helped put together was a 261" sbf 17:1 compression .500 lift cam nearly 700hp at 11500 rpm on alky. Oh and it was only real good for about 10 passes. But what an ungodly noise!
Lots of Comp eliminator engines rev like that. The way to go when the class is weight per cubic inches is a light car with a small engine. Piston speed there isn't the limit, maybe valvetrain. Some of the piston speeds on the huge motors is a bunch more, 6" stroke and over 8000 rpm.
I can believe it . Those sbc could be would out in the upper 9700 -9800 RPM's with no problem , so what's a couple thousand more rpm . I am sure they have tested that on a Dyno many times already . Thing is they don't tell you how many runs it makes before the next rebuild ! That's the key to that engine ! Many , many rebuilds ! Retro Jim
The shit is really deep this morning,I am going to get my snowblower to clean out the computer room. You guys don't have a clue what the heck your saying.Rifle drilled crankshafts? my chevy cranks have an oil passage thru the center of them ,tell me how this works!! H beam rods,you mean a 12,000 rpm engine has steel rods.11,000 rpm 406 ? wow fucking wow!! I'm going to hang out with some Rat Rodders today ,I can't take this kind of crap.
Guys twisted Boss motors in MP to the same rpm levels all the time back in the day, still do in Comp. Nothing to do with "Chevy" everything to do with short-stroke drag race motors. And building MP and Comp elim. motors is cheap??!! You gotta be kidding!
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