A completely flat torque curve will result in peak HP coinciding with peak torque no matter what RPM it happens at. Given that torque is mostly a function of engine displacement, you're not going to get much more at 4100 no matter what you do....
Peak torque too close to peak hp
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Re: Peak torque too close to peak hp
Last edited by peejay on Thu Mar 15, 2018 9:36 pm, edited 1 time in total.
Re: Peak torque too close to peak hp
I don't get what you're getting at? All dyno sheets that read in English readings will "cross over" at 5252rpm whether it is some low revving piece of shit that only makes power up to 6500 or a decent engine that makes power up at 9000-10000....
- midnightbluS10
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Re: Peak torque too close to peak hp
He said how they cross over. Not where. Everyone here knows they cross at 5252 lol.
JC -
bigjoe1 wrote:By the way, I had a long talk with Harold(Brookshire) last year at the PRI show. We met at the airport and he told me everything he knew about everything.It was a nice visit. JOE SHERMAN RACING
Re: Peak torque too close to peak hp
What variations of 'how' can there be, the angle they cross at with particular X and Y axis scales?
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
Re: Peak torque too close to peak hp
I like engines that have T and Hp still going up past 5252 rpm.
pdq67
pdq67
Re: Peak torque too close to peak hp
Put a DP'er on it, the secondaries are not opening fast enough and maybe not all the way.
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- midnightbluS10
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Re: Peak torque too close to peak hp
Well, for example, they could cross at 450/420
Or 410/450
Or 411/450
Or 412/450
Seems there could be many variations. And what about the numbers right before and right after that? What are they doing?
Shit, I dunno. Lol. Just being devils advocate here.
JC -
bigjoe1 wrote:By the way, I had a long talk with Harold(Brookshire) last year at the PRI show. We met at the airport and he told me everything he knew about everything.It was a nice visit. JOE SHERMAN RACING
Re: Peak torque too close to peak hp
Until you figure out what centerlines the cam is installed at, there's no way to know which way to move.
Put a degree wheel on the engine, pull the rockers off, put an indicator on the #1 intake lifter, and find the intake centerline, by going .100" down both sides from max lift.
Put a degree wheel on the engine, pull the rockers off, put an indicator on the #1 intake lifter, and find the intake centerline, by going .100" down both sides from max lift.
Mike Jones
Jones Cam Designs
Denver, NC
jonescams@bellsouth.net
http://www.jonescams.com
Jones Cam Designs' HotPass Vendors Forum: viewforum.php?f=44
(704)489-2449
Jones Cam Designs
Denver, NC
jonescams@bellsouth.net
http://www.jonescams.com
Jones Cam Designs' HotPass Vendors Forum: viewforum.php?f=44
(704)489-2449
Re: Peak torque too close to peak hp
OK, you've lost me. At 5252.113122 RPM, the horsepower and lb-ft. of torque will by definition always have exactly the same numerical value. If your examples are intended as potential HP vs. TQ numbers at that RPM, they are not possible.midnightbluS10 wrote: ↑Fri Mar 16, 2018 4:12 amWell, for example, they could cross at 450/420
Or 410/450
Or 411/450
Or 412/450
Seems there could be many variations. And what about the numbers right before and right after that? What are they doing?
Shit, I dunno. Lol. Just being devils advocate here.
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
Re: Peak torque too close to peak hp
Maybe there is a bit of a dip in the HP curve? That cam should certainly peak another 800-ish rpm higher. I’ve used that cam numerous times and in a sbc will easily go to 6k rpms with the basic 981-16 springs.
Re: Peak torque too close to peak hp
5252 isn't anything magic. Power always goes up faster than torque because "power" doesn't exist, it is just a mathematical construct that allows our simple brains to quickly balance torque vs. gearing for a given road output.
Torque is what accelerates you. Torque at higher RPM accelerates you more, because it allows you to run shorter gears for the same speed, so therefore more thrust at the ground. Horsepower is just shorthand for torque and RPM.