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Re: thinking about building a supercharged 440
[Re: bigblockbryan]
#1468261
07/16/13 04:17 PM
07/16/13 04:17 PM
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Joined: Jan 2003
Posts: 12,899
Benton, IL.
DaveRS23
Master of nothing...
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Master of nothing...
Joined: Jan 2003
Posts: 12,899
Benton, IL.
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600+ HP from a 500+ inch BB Mopar is not that much of a stretch for a street engine. Here's my combo; Ohio Crank 500" kit $ 2,200 Eddies $ 1,400 MCH porting $ 1,000 total $4,600 With the al heads, I get by okay on 93 pump swill with 11:1 comp. All the other costs, like valve train and machine costs are basically the same whether you are building a stroker or a blower motor. In fact, a lot of the Ohio Crank kit's costs are probably also incurred in the blower motor, so the real world cost difference would change a few hundred dollars. My engine makes 520 rear wheel HP, which would put it in the low 600s at the crank. It has a 246*/256* @50 FT solid cam. Which drives nice even with the automatic. But the blower certainly looks cooler and is capable of even more power with a pulley change and a couple of other things. Really, the only constraints here are budget, personal preferences and the limits of the block itself. How much is the complete blower set-up going to run you?   
Master, again and still
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Re: thinking about building a supercharged 440
[Re: bigblockbryan]
#1468262
07/16/13 10:13 PM
07/16/13 10:13 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
also could i just buy some thicker head gaskets for my current 440 run a super charger on that i have a 440 i built that got 10.5.1 compression speed pro forged flat top pistons scat h beam rods factory steel crank 452 heads comp cam 484 the the whole assembly is balanced too otherwise i think i will keep my eye out for a 400 mopar motor or i also have a verry old school 383 golden lion motor would that work?
just because you have 10.5:1 advertised pistons doesn't mean you have hat compression. As mentioned adding thicker head gaskets can reduce compression. The guy the built my motor used a .057 gasket to get the compression down however I'd think for boost applications you'd want to do it different. Maybe sell your heads and use the Eddy 88cc heads. ditch that 484 cam and have a custom grind. You'll need to see how far down in the hole your pistons are to get a good measure of compression.
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Re: thinking about building a supercharged 440
[Re: bigblockbryan]
#1468264
07/17/13 12:54 AM
07/17/13 12:54 AM
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Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
dodgeboy11
super stock
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super stock
Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
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If it was me I would build a 452 out of a 400 block with a 440 crank that has the mains cut for the B block. A shorter stroke is going to put less stress on the block, the 400, having the smaller main journal, is stronger in the mains than a 440 and with a shorter cylinder, it's stronger there as well as long as there's enough meat in the cylinders (sonic check the block). That being said, I would not be afraid of throwing a set of main studs at a 440 block, using a forged crank, preferably something with a good radius on the bearing journals (the stock 440 cranks are undercut and more prone to cracking), good H beam rods and a stout forged piston. Heads need to be something that flow in the neighborhood of 275-280 in the range your cam is going to lift the valves to, or, as previously stated, some performer RPM's with the guide clearances checked should do the job. Turbos make the easiest power, but adding boost through a supercharger is still going to be easier on the block than N/A horsepower because you can tune it to a lower rpm. Anytime you choose to increase the power in something, you run the risk of breaking something, but that's the risk we take as hot rodders. It's been done before and it'll be done again. Everyone has some story that is taken for gospel, but, quite simply, isn't. Proper tune is the most important thing, detonation breaks things, and at that power level, you'll want it as spot on as you can get it. Good luck and have fun.
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Re: thinking about building a supercharged 440
[Re: dodgeboy11]
#1468265
07/17/13 07:14 AM
07/17/13 07:14 AM
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Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
Swears too much
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Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
If it was me I would build a 452 out of a 400 block with a 440 crank that has the mains cut for the B block. A shorter stroke is going to put less stress on the block, the 400, having the smaller main journal, is stronger in the mains than a 440 and with a shorter cylinder, it's stronger there as well as long as there's enough meat in the cylinders (sonic check the block).
The stock 400 stroke is even shorter... and with boost, you really dont need the cubes... even for a 'mild' goal like 600-700HP. The short block, short stroke, long rod combo is about as bombproof as you can get without getting into REAL cubic dollars. Use a steel 383 crank and a 400 block, any year. Where i'm from (land ov expensive parts) thats about $100 each. Buy whatever cheap aftermarket rods builders here are liking these days, some cheap forged pistons, BALANCE IT, throw it together for about 8:1 compression (less will be a bit ov a dog out ov boost, more will limit the amount ov boost and limit your tuning range).
If you want a 440, blower KIT options are far more available, and cheaper. The only issue going with the lowdeck route is the manifold... Finding a blower kit for a 383/400 is harder, fewer companies offer it, and ALL use a crappy welded-up manifold. The only company offering a true roots-dedicated lowdeck manifold is Indy... and personally, i just really dont like it. There IS a guy in Australia that makes a really cool 383-specific blower manifold... but he doesn't stock them (made while you wait), and obviously... you'll have to pay real money for that. Many companies make a true blower manifold for a 440 block. Last i checked, full kits could be had for under $3000.
As for all the guys offering up N/A stroker combos... who cares? If you want to save money over a blown bigblock Mopar that badly, build a small block Chevy and drop it in... Roots blowers are 100% BAD ASS. NOTHING wakes up a crowd ov onlookers like a Roots-blown big block blowing the tires (no matter HOW big they are) all to hell...
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Re: thinking about building a supercharged 440
[Re: Pale_Roader]
#1468268
07/19/13 10:11 AM
07/19/13 10:11 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
I forgot to add, one better way to do the lowdeck route (than buying an expensive welded up manifold that ALL manufacturers come with) would be to use Stage 6 heads. That will let you use a dedicated 440 manifold (maybe even the full kit, if the measurements come out right) on a 400. Only issue there is finding a GOOD set ov Stage 6's...
That was how i was going to do it. I had some Brodix B1BS for the build, but the hokey manifold had me scratching my head for a while... and i'm far too paranoid to send $800 to Australia and then wait however long for a guy no one knows to finish and send me my manifold. Damn his stuff looked reeeeaaaalllly good though...
what he said, with the stage VI heads you can use a 440 intake. And since everybody thinks they are junk, you might find a set cheap.
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Re: thinking about building a supercharged 440
[Re: John_Kunkel]
#1468270
07/19/13 02:01 PM
07/19/13 02:01 PM
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Joined: Jan 2003
Posts: 1,214
Newberry Springs, CA
69Mannix
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,214
Newberry Springs, CA
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Quote:
If you want to run a roots blower for the "wow" factor it can be made very streetable. Even with a fairly wild cam the blower will smooth out the idle and off idle driveability.
With a Wedge Mopar I wouldn't run the compression over 8-1; with a 6-71 blower you can overdrive it a little, with an 8-71 run it 1-1 or underdrive it.
Here's a pic of the 6-71 blown street rig I has back in the seventies, very docile when just cruising.
Ok John, what intake manifold did you use?
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