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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

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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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But what I don't understand is, 90% of us never knew this was possible. All the posts about how to get 600hp pump gas small block, and this 500 cube monster or the Indy 471 were never mentioned. I am still amazed its possible. And this post has been an education already.

If I were an engine builder, this would be an interesting area to grow the buisness if you could pull it off in a "kit" form at a better price, than a one time custom one. Its a shame because I just think its a little too late to get after market manufacturers excited about supporting it with products because I believe the market is shifting more toward the 3G hemi's now.

I certainly have a car that would hook it, and would have loved all the weight off the front.

The down side, other than cost, is the heads available probably won't make the hp this should be capable of. I will be real curious to see how this comes along, and I am already

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Are you going to have it dynoed before installing it?

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I would never rely on a Dyno to get my HP. I have only one way of doing it. Vehicle weight VS MPH. I have never dynoed an Engine and I probably never will.

Of course you might want to look at 60 ft to see if chassis efficiency is there etc. But that will not affect MPH much so you can pretty much use MPH. What I am saying is, in a properly set up car the MPH VS Weight will tell you.

I would only use a SINGLE dyno, to compare two engines, or to compare different mods on a single engine.

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I think the reason no one has done it is because every one thinks if the motor won't turn 7500 rpm then it ain't right

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I think the reason no one has done it is because every one thinks if the motor won't turn 7500 rpm then it ain't right and there ain't no heads out ther to support a 500 inch small block at high rpms so no one builds them.

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A 450 running 7600 RPM is about the same as a 500 running 6800 RPM. I know it could be done but it would be very expensive. Think about the heads an average guy could afford to turn a 500 7500 rpm and still make power, not a bucks down guy, then what I said becomes very clear. Not a lot of cross section available with any readily available head that is even remotely afordable

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gilberto.

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I am not saying a max effort W8 won't do the job but what would one of those pro stock truck heads cost complete and assembled with springs nessacary to handle the cam nessacary to turn a 500 inch motor effectively 7500 RPM? That is why no one builds 500 inch SBMs

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With all this talk about price, I kinda think we're forgeting that this is a 500" SMALL BLOCK! I'm not sure the word mountain motor and accessable belong in the same sentance.

BTW- What your doing is amazing! I wish you would reconsider the dyno as this is a major milestone for all engine builders out there. IMHO What your doing and the way your doing it needs to be recorded. This is hot rodding history!

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I think Ron is right about the dyno...One could say it made 900 horse, another could say it made 500..if the car runs in the high 9's at the weight he is at, it will be very easy to compare it to other motors on here, output wise, that have been dyno'ed and raced, and make a pretty close comparison, and save him some coin.

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With all this talk about price, I kinda think we're forgeting that this is a 500" SMALL BLOCK! I'm not sure the word mountain motor and accessable belong in the same sentance.

BTW- What your doing is amazing! I wish you would reconsider the dyno as this is a major milestone for all engine builders out there. IMHO What your doing and the way your doing it needs to be recorded. This is hot rodding history!

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I think Ron is right about the dyno...One could say it made 900 horse, another could say it made 500..if the car runs in the high 9's at the weight he is at, it will be very easy to compare it to other motors on here, output wise, that have been dyno'ed and raced, and make a pretty close comparison, and save him some coin.

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