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its all about MONEY

big block or small block

its money and time into it

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Or, you can ALWAYS say: Speed (hp) costs!! - How fast do you wanna GO??

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Sometimes, people mistake these threads as a bash a big, or bash a small block deal.

I didn't see it that way at all and the few points I mentioned, I consider critical and therefore should be optimzed no matter the cubic inch, to attain the lowest possible ET.......IMO.

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Don't worry about the "superficial" Jim. Some of us DID understand the facts of your input and consider it very useful (helpful). Thanks!

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You can talk to some people till your blue in the face and in the end all you got was blue in the face If they don't get it by now 2011 they will never get it and thats why most are still stuck thinking it's the 1970's with .590 cams and TRW pistons. If the last statement offends you then you are who I'm talking about.

so true..sometimes going to this site is like going back time....im still laughing over the '' what does he know'' comment...lol ..lol

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Starting to BOIL..again?

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Man, you big block guys are too much. There is a picture of my Charger 3500 punds + driver, Hod Rod magazine and Car craft also, 440 factory strok and factory heads, 906´s. It ran 10.50 back in the 90´s, street car. 440 are ok and they run strong, but I like small block. there is nothing wrong with small blocks and I beleive they can outrun any big block (So don´t say people start small block and then go big blobk because it´s not true in every case)

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Wow!! I have that issue somewhere.

How 'bout this though
We have 2 cars, both weigh 3000lb, both go 11.00 @ 125mph. One has a B/B, the other a S/B.
Which one makes the most power?

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Man, you big block guys are too much. There is a picture of my Charger 3500 punds + driver, Hod Rod magazine and Car craft also, 440 factory strok and factory heads, 906´s. It ran 10.50 back in the 90´s, street car. 440 are ok and they run strong, but I like small block. there is nothing wrong with small blocks and I beleive they can outrun any big block (So don´t say people start small block and then go big blobk because it´s not true in every case)

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Wow!! I have that issue somewhere.

How 'bout this though
We have 2 cars, both weigh 3000lb, both go 11.00 @ 125mph. One has a B/B, the other a S/B.
Which one makes the most power?

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not really the question , but the BB would do it cheaper.

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Not always what if I was given a 500hp small block then would the Big block be cheaper?

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How 'bout this though
We have 2 cars, both weigh 3000lb, both go 11.00 @ 125mph. One has a B/B, the other a S/B.
Which one makes the most power?

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Based on Physics.

If you run the numbers on 3 different HP calculaters they should all be dead nuts on But they wont!

Should be simple math right

Based on Physics,

If both combos are optimized, they should have the exact same HP right, its simple Physics as posted earlier by others



Now comes Theory,

Rehr Morrison theorizes, that if you take the Same HP but apply it at a higher RPM with more mechanical leverage. You will be faster!

Since the SB should rev higher in the above said combo. It therefore must have Less HP then the BB since it ran "only" the same number and not faster!

So the same exact HP, wont produce the Same ET, based on this.


I theorized, as others have that the BB with its wider torque/HP band would be faster then the SB at the same HP. So therefore the SB must have More HP then the BB to run the same number!

So the same exact HP, wont produce the Same ET,
based on this.

No Doubt Physics are involved, it just seems to be to hard to nail down with just the Simple, "MPH to Weight" , "Power band to Stroke" theorys.

IMO, Rehr/Morrisons theory has merit @ 10,000 RPM with more gear leverage.

But, so does the broader powerband scenario @ 6000 RPM, Take your choice with this 11.00 combo.

For the record,
500 HP @ 10,000 RPM is 263# of torque.
500 HP @ 6000 RPM is 438# of torque.


Please Tell me Tig, that you have some Dyno numbers to toss in. And that the Dyno was the same Dyno, not two across town that are a 100 HP different from one another.

Lets not forget, Jim Scortino, and W7 both stated, HP is HP, with the same HP if optimized it should run the Same ET. Its Physics, right.!

Rehr/Morrison says no, I say no!

These combos dont race down the track at a Fixed RPM HP level!

The easiest Physics of all should be the "weight vs MPH = xxx amount of HP". Why cant All of the various HP calculators agree?

After all, Its simple Physics right.

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Man, you big block guys are too much. There is a picture of my Charger 3500 punds + driver, Hod Rod magazine and Car craft also, 440 factory strok and factory heads, 906´s. It ran 10.50 back in the 90´s, street car. 440 are ok and they run strong, but I like small block. there is nothing wrong with small blocks and I beleive they can outrun any big block (So don´t say people start small block and then go big blobk because it´s not true in every case)

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Wow!! I have that issue somewhere.

How 'bout this though
We have 2 cars, both weigh 3000lb, both go 11.00 @ 125mph. One has a B/B, the other a S/B.
Which one makes the most power?

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not really the question , but the BB would do it cheaper.

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In reality, they BOTH have similar power outputs, so that part of the question is a moot point. The Big Block wuold be cheaper to run.

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lets go with original post hp $$$ i'm not bashing small blocks i just want to see a 550hp small block build. how much $$ what parts etc.no turbo supercharger no high tech stuff us big block guys can not grasp we are still in the 70's

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This would be INTERESTING!!

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not really the question , but the BB would do it cheaper.

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Not always what if I was given a 500hp small block then would the Big block be cheaper?

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well not too many people get a 500hp engine dropped in their lap.

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Not really, the cheapest will be the one that the owner can do most of the work like head porting, valve job, the assembly, the tunning, the selection of the right parts, building the oil pan, oil pick up and so on. That would be the cheapest and, believe me, at 750 hp the small block would cost less money than a Big block because a set of W9 heads are less than half the price of a B1 head for a big block, but still both of them are Mopars so they are both ok in my book.

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Not really, the cheapest will be the one that the owner can do most of the work like head porting, valve job, the assembly, the tunning, the selection of the right parts, building the oil pan, oil pick up and so on. That would be the cheapest and, believe me, at 750 hp the small block would cost less money than a Big block because a set of W9 heads are less than half the price of a B1 head for a big block, but still both of them are Mopars so they are both ok in my book.

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This is true for both type engines, the more work you are capable of doing yourself, the more money you $ave. One important note though, although 750
hp smallbocks MAY be cheaper to build, in some cases, you have to look at the intended usage of that motor at that power level and what type of chasssis it's going in (street/strip car, all-out
drag car, circle track racer, truck, boat etc.) that also determines cost!! This is the same for the 750hp Big Block especially the RB's, since they have a tendancy to have "main cap walk" at that power level or beyond. This makes preventive measures slightly costly, by either starting out with a fresh foundation (improved design block), slick machine work/parts on the older production blocks or adding MORE cubes (stroking) to keep the rpms at a "streetable" (6500 rpm or below) level to offset the stress found at the higher rpms with that amount of hp. IMO they're both
not cheap to build as the hp dial is turned up.
Go cheap if you want, you'll just pay more later
replacing that engine part or maybe the block.

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Not really, the cheapest will be the one that the owner can do most of the work like head porting, valve job, the assembly, the tunning, the selection of the right parts, building the oil pan, oil pick up and so on. That would be the cheapest and, believe me, at 750 hp the small block would cost less money than a Big block because a set of W9 heads are less than half the price of a B1 head for a big block, but still both of them are Mopars so they are both ok in my book.

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You could build 750 hp with old max wedge heads.

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This is true!!

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Lets not forget, Jim Scortino, and W7 both stated, HP is HP, with the same HP if optimized it should run the Same ET. Its Physics, right.!

Rehr/Morrison says no, I say no!

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I think you might wanna reread my posts.

Two 500hp engines......engine one peaks at 5000 and is down 50hp by 5500. Engine two makes 500hp at 6000 and is down 50 hp by 7000.

I'll take engine two.

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Lets not forget, Jim Scortino, and W7 both stated, HP is HP, with the same HP if optimized it should run the Same ET. Its Physics, right.!

Rehr/Morrison says no, I say no!

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I think you might wanna reread my posts.

Two 500hp engines......engine one peaks at 5000 and is down 50hp by 5500. Engine two makes 500hp at 6000 and is down 50 hp by 7000.

I'll take engine two.

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engine # 2 here.