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11-05-2007, 09:59 AM
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CC Member
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Join Date: Jul 2006
Location: Ronkonkoma,
NY
Cobra Make, Engine:
Posts: 187
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Not Ranked
706 Hp
To those who think some of our builds are a little conservative, we offer evidence of our on-going efforts to dispel that notion. The Man O’War Hardcore 427 Drag Man O’War small block.
Pictures speak louder than words (But NOT louder than this motor!)
Now 706 HP should produce ¼ mile times conservatively in the low 10 range in the right, light vehicle and traps in the 137 MPH range. A/F ratios and BSFC figures are excellent.
Here’s a brief description of this combination: Man O’War iron 9.5 deck block, with 13.5:1 using C-14 race gas, forged and balanced Eagle and Mahle internals, Hardcore spec solid roller, and the really significant items, new Man O’War 235cc, 18 degree heads. We pulled out some stops to see what they’d really produce. We hand-ported them in-house the good old fashioned way-slight tootsie roll in chamber and ports, gasket and manifold match and our killer valve job. Speaking of manifolds, due to selling out our batch of Man O’War single plane intakes, we temporarily reverted to the Super Victor with 4500 adapter. We anticipate a little more power very soon when our manifold arrives.
Remember, we’ve put LS style ports in Ford architecture. Seems to work OK…
Now we know that this is not the prime choice for all GT and Cobra enthusiasts but we also know that many of us have other Ford-based hobby and track cars. All the build and pricing details can be found on The Engine Shop site in my sig for those with interest.
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11-05-2007, 10:04 AM
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CC Member
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Join Date: Feb 2004
Location: Sudbury,
MA
Cobra Make, Engine: Diecast for now
Posts: 153
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Not Ranked
Holy Cow  |
11-08-2007, 10:02 AM
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CC Member
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Join Date: Aug 1999
Cobra Make, Engine:
Posts: 2,888
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Not Ranked
That's a lot of HP for a sb Ford considering you are using in line valves. What a good feeling it is when you pop the hood and the guy you just blew away was positive you were gonna show him a big block. 
Keep up the good work and one of these days the Ford guys are gonna realize who Bill Mitchell is.
RD
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SAAC member and supporter
Club Cranky charter member
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11-08-2007, 10:54 AM
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CC Member
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Join Date: Sep 2002
Location: Hickory,
NC
Cobra Make, Engine: ERA 427SC w/427so, ERA GT #2002
Posts: 1,106
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Not Ranked
I'd like to see a pull with 10.5:1 compression.
__________________
Tom
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough HORSEPOWER." Mark Donohue
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11-08-2007, 11:06 AM
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Banned
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Join Date: Oct 2003
Location: Yorba Linda,
CA
Cobra Make, Engine: SPF w/392CI stroker
Posts: 3,293
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Not Ranked
Put some "Ford 289" valve covers on that beast, would you?!?  |
11-08-2007, 02:04 PM
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CC Member
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Join Date: Jul 2006
Location: Ronkonkoma,
NY
Cobra Make, Engine:
Posts: 187
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Not Ranked
Tom,
We would need a cam substantially smaller than this to allow 10.5:1. Examples are our 460 (admittedly 33CI larger) at 11.0:1 with .621/.627, 254/260 and our 427 Hardcore at 10:1 with .578/.597, 252/260.
The 460's routinely make 630 and the 427's 535-540.
Red,
Wish we could but the stud girdle and rollers would beat them to a pulp...
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11-08-2007, 05:43 PM
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CC Member
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Join Date: Sep 2002
Location: Hickory,
NC
Cobra Make, Engine: ERA 427SC w/427so, ERA GT #2002
Posts: 1,106
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Not Ranked
Red: Sorry, I didn't mean change just one thing, i.e., compression. I realize such changes have to combine others as you've pointed out. What I was getting at is building a streetable engine, one that can use pump gas. I just dropped my 12.5:1 FE427 to 10.3:1 for that reason. Not as much kick, but I don't have to wear ear plugs now.
Tom
__________________
Tom
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough HORSEPOWER." Mark Donohue
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11-08-2007, 05:58 PM
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CC Member
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Join Date: Jul 2006
Location: Ronkonkoma,
NY
Cobra Make, Engine:
Posts: 187
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Not Ranked
Hah?
Speak up Tom! 
Is a 460 that makes 630 on pump gas OK for the street? |
11-09-2007, 05:38 AM
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CC Member
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Join Date: Feb 2007
Location: Raytown,
mo
Cobra Make, Engine: FFR Coupe SOLD.Current 66 Mustang
Posts: 962
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Not Ranked
oooooooooo yea!!!!
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11-09-2007, 05:54 AM
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CC Member
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Join Date: Sep 2002
Location: Hickory,
NC
Cobra Make, Engine: ERA 427SC w/427so, ERA GT #2002
Posts: 1,106
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Not Ranked
Red: Sounds good to me . . . and you don't have to carry that expensive racing gas or AV gas, you can get expensive gas right at the pump. 
__________________
Tom
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough HORSEPOWER." Mark Donohue
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11-09-2007, 10:06 AM
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CC Member
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Join Date: Feb 2007
Location: Raytown,
mo
Cobra Make, Engine: FFR Coupe SOLD.Current 66 Mustang
Posts: 962
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Not Ranked
We dont have a high compression engine but iv noticed how much more responsive the engine is on race gas,Man O war do you find that to be true or is it just me dreaming its better?  |
11-09-2007, 10:22 AM
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CC Member
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Join Date: Jul 2006
Location: Ronkonkoma,
NY
Cobra Make, Engine:
Posts: 187
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Not Ranked
You're not dreaming Bill. When I take home some shop race gas (with lead) for my 10.4:1 Sideoiler, the pipes turn dark tan, shutoff is clean and throttle response is very sharp-and I have a lot of duration and fair overlap.
However all our builds here are very responsive to throttle and idle because AED builds 870's and 1050's to our spec and our dyno guy will work the jets if he see's one with less than optimal A/F or slightly sluggish. They go out of here real snappy.
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11-09-2007, 10:40 AM
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CC Member
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Join Date: Feb 2007
Location: Raytown,
mo
Cobra Make, Engine: FFR Coupe SOLD.Current 66 Mustang
Posts: 962
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Not Ranked
I thought we were a little on the rich side anyway,its hard to jet other than by the sound of the engine with street gas it doesnt seem to color the plugs like the race gas does,our 408 doesnt have that much cam its a custom ground mech roller in the low .7 lift for a blowthrew app. just havent had the 5k to finish were on an 830hp I just dont want to hurt this mill going lean the peace of mind is worth it not taking it to the edge of its perfomance with timing and jetting..
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11-09-2007, 10:43 AM
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CC Member
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Join Date: Feb 2007
Location: Raytown,
mo
Cobra Make, Engine: FFR Coupe SOLD.Current 66 Mustang
Posts: 962
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Not Ranked
has anyone done a blowthrew app on one of your big small blocks would be a cool salt flats deal BIG SPEED!!!!!
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11-09-2007, 11:41 AM
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CC Member
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Join Date: Jul 2006
Location: Ronkonkoma,
NY
Cobra Make, Engine:
Posts: 187
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Not Ranked
Funny you ask. We did build the 302 long that Thacker and Jimmy Shine set a record with at B'ville in their Deuce. It was our block and heads.
We have a Magnussen blower on the shelf that we'll test on our combinations soon. I'll post when that happens but we'll be testing SBC first.  |
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