Quote:
Originally Posted by Ron Sutton
While the 434" engines made the most power ... torque & horsepower ... they were too hard to drive fast. With 4" of stroke, the drivers were always struggling to get them off the corner optimally. They had to drive them with the proverbial egg under the throttle. That's doable occasionally ... but not consistently lap after lap when your adrenaline is up. The 355"-377" engines had way less tire spin challenges ... but just didn't make enough torque to accelerate the car off the corner optimally. The 383"/388" engines came of the corners hard, but laid over on the straights.
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That's funny Ron. I started with a 377 and quickly discovered that was a big issue on both AutoX and road course. So, I decided to go overboard and skip all steps in between and go with a the big bore big 4" stroke 437"!
Quote:
Originally Posted by Ron Sutton
The engines that were "just right" were big bore (4.125"-4.185") & medium stroke (3.750-ish). These 400"-410" engines were dominant.
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So, what you're saying is.... Sprint Car engines FTW.
I really wanted to go with a 3.8ish stroke but decided to reuse all the parts with my used SB2.2 "deal" I found... smart? Maybe not... fun? Should be!
Quote:
Originally Posted by Matt.A
I have a Camaro with a 454 cube LS7, and it never lugs out of corners versus my Coyote powered Mustang. However, put the two cars on a road course, and the less powerful Coyote motor is way more fun, despite being slower, simply because you can put your foot down and hold on almost all the time.
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You shoulda bought a Miata like that Weld guy.
Quote:
Originally Posted by DavidBoren
Maybe I am just retarded. But I'm under the impression that using a 4" stroke crankshaft will in no way limit my useable rpms.
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For 99% of what are people are doing around here, I would have to agree with you.
Quote:
Originally Posted by DavidBoren
Everyone always says that they want a broad powerband, and yet it seems no attention is ever paid to broadening it to the left. People go through great lengths to expand the powerband to the right, ever increasing the redline. And engine design and architecture reflects the chase for higher redlines with oversquare engines. Yet you can achieve roughly the same effect starting power production earlier.
3000-8500 powerband is 5500 useable rpms...
So is... 1500-7000...
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A true 1500 to 7000 rpm range sounds very difficult to achieve. What would the specs of this engine look like?
Oh, and this is a winner:
Hunter S. Thompson said that men like big guns and fast cars because they push us to our limits, rather than us pushing the machine to its limits.
