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3.75” is probably the stroke the B series of engine should of came with but it I was to go all that trouble to stroking it, I’d go with something more like 3.915”-4.25” for 451-496 cid.

My guess it probably has a bit higher rpm band, seems like people don't want a performance engine having the rpm range of a dump truck. Why I think people prefer a certain ish cid for a certain ish hp (rpm) range.

A dyno should be able to accurately measure the engines torque @ rpm ? I could see the circumstances that torque is being created under from one dyno to the next eg.. air, oil, water, temps etc.. might not be the same accurate condition for different engine output.

Richard Holdener did a low cr 440 with 4bbl headers and mild cam made like 330 hp if I remember right, it wasn't a rebuild though, it was a motorhome 440 from the road kill guys.

That's crazy to miss the mark by that much, how could that be possible even with a limited knowledge of performance engines.

That's why I find it kind of funny when people ask people on here what's the best "whatever" be it an intake or a carb or cam etc... for their combo and figure they should be able to put together the ultimate combo on 1st try with no experimenting required.

That's what I don't get about the whole Nick video, didn't it even cross his mind the factory might of fudged on the numbers.

I've only skimmed through them, but it seems he can't figure out why it won't get over 400 lbs-ft and since there factory rated for around 425 lbs-ft he think something up.

I skipped through it apparently his still can't figure out why it's making less than rated stock torque #'s seems like a part III is coming soon :)

Apparently there's a part II, don't if he finds more torque.

We aim to please :)

To me the only difference between a 383/440/400 is 0.070"- 0.090" 4.25 vs 4.32 vs 4.34 it ain't that big of a deal for the power most are making.

I don't think anyone is overly beating on him, I like that he does a lot of mopars, but find most of his builds and videos pretty boring.

Usually is but a lot of it cause people generally won't run the required gears stall etc.. Most under gear their combos and most seem to run 3.23-3.55 the larger the engine the closer for those gears to be ideal the smaller the further from ideal they become. Eg.. 450 hp 440 vs 383 vs 318...

That's a pretty sweet combo, shows with the right parts a 383 can be a decent performer.

Was that basically with stock, stock ish heads ?

You didn't miss much think he got 340hp/385tq with basically stock engine and mild cam think it was around 220 @ 0.050", I skip through it not generally a fan of Nick's videos, I guess Nick was disappointed since stock rating is something like 335hp/425tq.

He's got around 65 million views in 8 years that's around 300-400 thousand dollars American before taxes, even if most of that's from the last 4 ish years that's still less than $100 thousands a year. Not bad but nothing crazy, that video only has 26k views so far probably not even making a...

Well if customers are anything like the people asking for build advice on here, they must be extremely vague and seemly pulling performance goals out of a hat. Doesn't seem like a lot of people give much thought to what they want and give even less thought to the rest of the drivetrain.

To me power numbers seemed about the same that a similar 340/360 would do.

Engine Master did a dyno on headers before and after beating on them pretending to make them fit and loss very little hp, by the end them beat them up pretty good.

People will go on endlessly over the cid and bore difference between a 318 and 340/360 but an extra 23-43 cid plus a 1/4" bore waste of time. Funny how no replacement for displacement/bore ends at 360/408. If you don't mind a square engine you could be running around with 496 instead of 408.

Don't get this doom and gloom, if he can't go headers ain't the end of the world just has a little less power. And always can do a swap down road, sometimes and probably a lot of times people have to run a compromised combos. The only option ain't all or nothing.

If it's not in the budget run the manifolds, can always do the swap down the road.

True but the issue is everyone thinks the sbm weight is fine but bbm is not, but reality is by time it's swapped in it's generally fairly close to sbm weight unless you keep it 100% stock.

I'd say 383 has more potential mainly due to bore size, but for an average build it's a coin toss, Depends what platform you want to invest in.

Torque wise should be between a a 360 & 408, HP wise you got a fairly large bore to make all the power you want.

Minus half stroke plus rod length from deck height gives possible piston height.

Do you have heads capable of making power up around 7000 rpm?