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Bogus!
:)
Liberator, your rpms seems to match your dyno pretty good. Maybe swap that blower for a T-ram...should do it. That and a really long return spring.
Geez, another century jet. HBjet, very nice engine and great numbers. Figured something big in the works. Looking forward to your speed as always...especially since our speed/power matched so closely before. Wouldn't be surprised to see high 90's, maybe triple digits with your setup tweeked? Glad to see someone besides me with hyd rollers. :) Be safe!
jer
[ June 19, 2003, 02:58 PM: Message edited by: LVjetboy ]
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Congrats,Just wondering what lifter you guys used on the hyd roller,Just think you could of got a another 150hp with those afr heads?What did those 990's flow?If you need a gps i will be glad to supply one.
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Originally posted by MissHBjet:
Hey Slowy...we been expecting you wink Well I sure didn't want to let you down pretty lady wink
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ChetCapoli:
oringinally posted by HBJet:
6300rpm it made 732hp
5500rpm it made 702hp
5800rpm it made 669ft.lbs.
4500rpm it made 622ft.lbs.
The motor is a 454BBC, 60 over, 4.25" stroke, Iron Chevy heads (990's) with some very nice port work done to them. over 700hp with cast iron heads.....only in California!
Oh and it was assembled by DNE Motorsports Development, which is in Costa Mesa, Ca.Geez HB...i dont think anyone on this board knew that. OH.....and thanks for the great info!
Ok, now let all of the "No Way", "That's Bogas", "I'm not buying it because I couldn't make my motor do that" begin :D
YEAP...and i'll be the first to acknowledge that too! I'll have to agree, great looking motor, but from the numbers coming from Westech, I'm starting to become suspicious. Don't get me wrong HB, if those numbers are correct, maybe you found the Miracle Engine Builder... Check out Chevrolet's ZZ572 Race Crate motors specs:
572 C.I.D. - 12:1 Compression Crate Engine Technical Information
Horsepower
720 @ 6250 RPM
Torque
685 Ft. Lbs. @ 4500 RPM
Max. Recommended RPM
6750 RPM
Compression Ratio
12:1
Block
New! Sportsman Tall Deck Bowtie Gen VI
10.200" deck height
Bore
4.560"
Stroke
4.375"
Crankshaft
Forged 4340 steel
Connecting Rods
Forged 4340 steel, H-beam style, Shot peened
Pistons
Forged aluminum
Full floating wrist pin
Piston Rings
Plasma-moly rings
Camshaft
Mechanical roller
Valve lift: .714" I, .714" E
Duration @ .050" 266º I, 274º E
Lifters
Mechanica l roller tappet
Cylinder Heads
Aluminum rectangular port
118cc combustion chamber
Intake Valves
2.25" Stainless steel
Exhaust Valves
1.88" Stainless steel
Valve Springs
Dual valve springs
1.567" coil diameter
2.050" installed height
230 Lbs. seat pressure
Spring Retainers
Hardened chromemoly steel
Rocker Arms
Aluminum roller rockers, 1.7:1 ratio
Push Rods
High performance one piece
Intake Manifold
Aluminum tall deck single plane
4500 series carburetor
Carburetor
1095cfm, mechanical secondary
Rear Main Seal
New! One-piece design
Windage Tray
New! Screened and louvered
Damper
High RPM torsional damper
Distributor
Multiple spark discharge
Ignition Timing
36º total advance
Spark Plugs
R42XLS
Fuel
Race fuel
You're producing 12 extra ponies with 91 fuel, hydraulic roller, less cubes, lower compression and finally iron heads... HMMMMMMM :D
[ June 19, 2003, 07:26 PM: Message edited by: lakesmodified ]
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Oh Boy... This is gona get good !!!! Pass the pop corn Please :)
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It's called Experience Eliminates Experiments
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LakesMod,
Let's think about this. You post a detailed list of specs...forged this, forged that. Floating wrist pins, hardened chrome-moly spring retainers, one-piece rear main seals, high RPM damper, multiple spark discharge distributer, R42XLS plugs...yada yada yada.
So what's really important for power? Let's condense that crate engine bs to power essentials and focus...
Aluminum vs. iron heads?
I'm thinking metal type drives total advance w/o detonation. 36 degrees in your crate engine example with AL heads vs. HBjet's unknown timing? Was his dyno test at less than 36 degrees? Until you know that, head metal advantage up in the air.
Or is compression king? 12:1 in your crate engine vs. HBjet's 10:1? (Just a guess)
Two points higher compression good for about 50 hp w/those cubes. But wait, better head flow on HB's part may compensate for that 50 hp...to the tune of 80 hp? So then how are you comparing engines? Do HBjet's heads flow the same as that crate engine, less or more? Head flow seems important.
Not to mention different cam profiles...lift only part of the equation.
Even with the crate engine's exotic race gas compression ratio...not something you'll find at your local marina, that crate engine may not perform as well?
So I don't see a conclusive comparison here. I'm no engine guru, but from what I've read in Hot Rod magazine, even small variations from tested engine build specs yield significant changes in tested hp. So posting a crate engine, with unknown head flow and cam profile characteristics, then concluding HBjet's numbers are bogus? Not sure about that. Could be a stretch.
I'm thinking central and east coast dyno's need recalibration for all the sweat humidity in the test room as they worry about west coast power. :)
jer
[ June 19, 2003, 10:10 PM: Message edited by: LVjetboy ]
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LV jetboy,You need to quite jibba jabbin,you make no sense!Lets see over 70 more cubic inches,2 or more points more comp,both got rect port open chamber,ones aluminum ones not,I know what a good set of 990's can flow,The list goes on!So did he test it today?
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Heres the 91 octane motor.Heres a pump gas one. 572 C.I.D. - 9:1 Compression Crate Engine Technical Information
Horsepower
620 @ 5500 RPM
Torque
650 Ft. Lbs. @ 4500 RPM
Max. Recommended RPM
6000 RPM
Compression Ratio
9.6:1
Block
New! Sportsman Tall Deck Bowtie Gen VI
10.200" deck height
Bore
4.560"
Stroke
4.375"
Crankshaft
Forged 4340 steel
Connecting Rods
Forged 4340 steel, H-beam style, Shot peened
Pistons
Forged aluminum, Full floating wrist pin
Piston Rings
Plasma-moly rings
Camshaft
Hydraulic roller
Valve lift: .632" I, .632" E
Duration @ .050" 254º I, 264º E
Lifters
Hydraulic roller tappet
Cylinder Heads
Aluminum rectangular port
118cc combustion chamber
Intake Valves
2.25" Stainless steel
Exhaust Valves
1.88" Stainless steel
Valve Springs
Dual valve springs
1.540" coil diameter
1.800" installed height
197 Lbs. seat pressure
Spring Retainers
Hardened chromemoly steel
Rocker Arms
Aluminum roller rockers, 1.7:1 ratio
Push Rods
High performance one piece
Intake Manifold
New! Aluminum tall deck single plane
4150 series carburetor
Carburetor
850cfm, mechanical secondary
Rear Main Seal
New! One-piece design
Windage Tray
New! Screened and louvered
Damper
High RPM torsional damper
Distributor
H.E.I.
Ignition Timing
36º total advance
Spark Plugs
R42XLS
Fuel
92 Octane
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I wonder what hbjets heads flow on a 4.310 bore and what the gm aluminum rect port flows on the 4.560 bore?Bigger the bore the better it makes it flow!I had a 500" ust like hbjets i sold for $2500,same crank,rods but it head 13:1 comp with ported gm bowties,I never dynoed it but i'll gaurantee it only made around 600-650hp.that gm motor is a good stroke bore combo!Anyways,motor looks good hbjet,Hope it works for you.