Aircraft Piston Engines

[Chris]

[quote author=Colonel Sanders link=topic=8669.msg23913#msg23913 date=1530998097]
Oh yeah, I remember the Chevy 305.  A 350 with decreased bore
but the same stroke.  Never understood why GM did that.  A much
better idea is to keep the same bore as the 350 and increase the
stroke from 3.48 inches to 3.75 inches (400 crank) to make a 383,
which ought to be well over 400 hp.[/quote]


That's the plan. If I ever freeze crack, blow up, wear out, or otherwise get sufficiently bored and have the money sitting around, the 305 will be replaced with a 383. A 200 hp jump should be a hell of a thing. I can nip at 50 mph with the 30 year old stock engine so would hope to be well into the 60s with a 383 and the right prop. I think the Alpha drive will survive as long as I don't pound it too hard out of the hole. A Bravo 1 would be awesome but it's a damn expensive upgrade.

[Colonel]

My limited experience with boat transmissions would indicate
that you should create horsepower with RPM, not bull torque.
I have limped home too many times on one engine after blowing
a transmission with 1500 ft-lbs of torque (no typo).

[img width=500 height=375][/img]

On that note, I suspect any reasonable 383 is going to have
over 400 ft-lbs of torque and over 400 horsepower.  Depends
upon what heads you choose, of course, and which cam and
intake.  Aftermarket heads and cams are [i]so good[/i] these days ...

[url=https://www.speedwaymotors.com/BluePrin ... 60536.html]https://www.speedwaymotors.com/BluePrin ... 60536.html[/url]

$10 per horsepower.

Top end [i]makes[/i] the power, bottom end [i]takes[/i] the power.