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Soooo, 500 cube small block Mopar is possible, and yet, I have never heard of anyone building one!

My only question after seeing this post is why has nobody ever built one before now? Why is this all of a sudden common knowledge, yet I have never heard or seen anything even close to that in a sbm before now.

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Ron's old motor was 474 inches..... INDY sells a 471" Kit now off shelf....

All it takes is a big crankshaft. Most guys doing SB Mopars are not willing to spend the $ to be honest.

However, a 4.5" crank in a SB package will not really be a great "race motor" combo (it's too much stroke IMO) That's really why no one has done one.... It's unusual to spend this kind of $ on a motor that will not be a max effort deal.

The 4.25" crank would be as big as I'd go for a race motor that needs to turn RPM & make big power.

The journal overlap on this 4.5" will be scary with 2.0" rods.

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Good points...


I know of a guy who went from roughly 400 inch smallblock to 450 inch smallblock, and because of the heads(230 indy)he has seem very little gain in performance, the car is just harder to hook because of the 4.25 inch crank instead of the 3.79 and 4 inch stuff he used to run.

The 500 inch smallblock is a cool deal, and as a "one off" piece its mighty intriging.
From a practical standpoint there are bunches of ways to get a smallblock to go 10 flat easily on pump gas with way less inches and cost, but Ron has the "cool factor" pretty much sewn up

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Even if a motor is head limited it will still build more torque with the added displacement. AND: if you can hook it up it will be faster. My car is going to have excellent weight bias so I think I can deal with the extra torque. I wanted a descent idle and to go 10.00 without straining. I may in fact go back to the 10" TA converter from the current ATI 8" when I put this motor in.

A good example was my 468 W-5 motor put out 435HP on the chassis dyno, but on that same pull it was 660 on tq and that was from the very bottom of the graph and heading down the whole way. In other words they could not measure the torque peak. It was too low. That motor drove bitchen on the street. It was like having a huge electric motor in the engine bay! LOL


Also, nobody said this motor was practical. I will admit it is not. I "did" research other motors before I called Ryan. I seriously thought about building an all aluminum 604 Big Block Wedge or even a HEMI. AND it probably would have cost about the same or even possible less. But I do not want to run 8's and if you do run a 10 flat and open the hood with that big HEMI in there, everybody will yawn. Of course you know even THIS motor could have had a much larger solid roller, big oil pan, vacuum pp, dominator carb and so on to make it even faster. I wanted something different and I wanted a simple unassuming look to the motor. Not sure if I will get that or not......

ALSO: If you do the math this crank is going to have NO OVERLAP. Unless I screwed up on my figures (in my head), this crank is going to be right at ZERO overlap