Roush vs 427FE vs Keith Craft

[AL427SBF]

my hydraulic roller cammed 540 cid engine revs from 6000 to 7000 rpm in 0.3 sec ... makes it really important, and almost impossible, to time that shift at 6300 rpm correctly

"rocket scientists" are specialists in V8 combustion engine dynamics
[/i]

stop! stop! I'm laughing so hard I can't breath!
with those last two posts let's wrap this baby up and send it to SNL for immediate airing

[Dimis]

Originally Posted by AL427SBF

F1 Cosworth and the Hemi fuel engine would rev at a rate of 50,000 revolutions per minute per second

my hydraulic roller cammed 540 cid engine revs from 6000 to 7000 rpm in 0.3 sec ... makes it really important, and almost impossible, to time that shift at 6300 rpm correctly

"rocket scientists" are specialists in V8 combustion engine dynamics


stop! stop! I'm laughing so hard I can't breath!
with those last three posts let's wrap this baby up and send it to SNL for immediate airing

What's so wrong or funny with those posts?

They make perfect sense to me

Originally Posted by AL427SBF

"rocket scientists" are specialists in V8 combustion engine dynamics

Sorry, but are you inferring that you are?
Either way, you seemingly didn't listen to one anyway...

[RodKnock]

Originally Posted by AL427SBF

"rocket scientists" are specialists in V8 combustion engine dynamics

I'm guessing that the Stanford professors that I know may have taken a course, possibly two, in Physics. Not sure, but I'll ask.

And if you think SNL has been even remotely funny this season, then well, I now realize the reason you couldn't find humor in my prior post.

[Cobra #3170]

Originally Posted by AL427SBF

F1 Cosworth and the Hemi fuel engine would rev at a rate of 50,000 revolutions per minute per second

my hydraulic roller cammed 540 cid engine revs from 6000 to 7000 rpm in 0.3 sec ... makes it really important, and almost impossible, to time that shift at 6300 rpm correctly

"rocket scientists" are specialists in V8 combustion engine dynamics


stop! stop! I'm laughing so hard I can't breath!
with those last three posts let's wrap this baby up and send it to SNL for immediate airing

That is the rate that those engines gain revolutions when free reved. The point is they can reach maximum rpm in about .16 seconds from idle speed in the case of the 500 inch hemi fuel engine and about .28 seconds in the case of a rather small 183 cid F1 engine. They free rev at the same rate to maximum rpm which is truly phenomenal especially when you hear either one.
It just shows that there is a lot more to it than component mass.

[AL427SBF]

Originally Posted by Cobra #3170

That is the rate that those engines gain revolutions when free reved. The point is they can reach maximum rpm in about .16 seconds from idle speed in the case of the 500 inch hemi fuel engine and about .28 seconds in the case of a rather small 183 cid F1 engine. They free rev at the same rate to maximum rpm which is truly phenomenal especially when you hear either one.
It just shows that there is a lot more to it than component mass.

Fair enough, I see your point so my post edited accordingly

But I think you'll agree it's still apples and oranges to the point of this hijacked discussion - the engine architectures are nowhere near the same.

The premise on this sidebar has been - generally, when you have a SB and BB making near same power, the parasitic drain from the rotating assembly and reciprocating mass on a BB has a greater impact on acceleration vs SB.

Granted, when you're making 8000 HP on a nitro fed hemi, the rotating & reciprocal parasitic loss difference to a race fueled 800 HP cosworth is obviously overcome by the shear power of the hemi.

Btw, if you do the math with those motors, the cosworth with max RPM at 18000 and hemi at 9500, then the cosworth gets to 9500 RPM .01 faster than that godzilla hemi and David beats Goliath once again - but by the slimmest of margins lol. (just funn'in with ya)