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10-30-2009, 05:39 AM
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CC Member
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Join Date: Jan 2007
Location: Chesterland,
oh
Cobra Make, Engine: Superformance #046 Dart 427w
Posts: 76
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Not Ranked
427 w build
Guys, I am building a 427w, for my Superformance. here are the specs. I am hoping for around 500hp.
Dart SHP block 4.125 bore
Eagle forged rotating assembly, 4.00 stroke, H-beam rods 6.250, Mahle pistons
Victor jr type heads 60cc 10:1-10.5:1 compression
ford hydraulic roller lifters
Comp cams extreme energy #35-522-8 duration: 282,290 lift: 565,574
duration @ .050 lift: 232,240
Victor Jr. intake
Holley 750 street HP
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10-30-2009, 06:14 AM
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CC Member
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Join Date: Feb 2005
Location: Perrysburg,
OH
Cobra Make, Engine: SPF #298 427 FI
Posts: 497
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Not Ranked
500 should be no problem.
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10-30-2009, 06:53 AM
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Senior Club Cobra Member
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Join Date: Jan 1999
Location: MARKSVILLE,LA.,,
Posts: 3,235
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Not Ranked
Quote:
Originally Posted by mpanten
500 should be no problem.
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Agreed, 500hp would be a low end,550hp or so would not be out of the question..........
All top quality parts you listed, should be a good reliable engine with plenty of torque also...........
David
__________________
DAVID GAGNARD
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10-31-2009, 07:24 PM
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CC Member
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Join Date: May 2008
Location: San Jose CA,
CA
Cobra Make, Engine: SPF_R_/BRG/FRBoss302/327CI/FordEFI/Under_Car_Exh/
Posts: 2,523
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Not Ranked
How about a Ford BOSS 351BB >?
__________________
Steve SPF 2734 MK3 / Brock Coupe #54- panavia.com
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11-01-2009, 04:17 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,391
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Not Ranked
I think you'll hit your 500hp. Peak will be at about 5500 rpm, which is right in a comfortable spot for a hydraulic roller.
It should be a nice timid street motor with lots of power.
If you ever decide you want more power, trade the heads off. If you can budget a little more, go with a set of AFR heads. You'll gain a lot more power.
That amount of horsepower is a lot, especially in a tiny car, but I always advise my customers to aim a little higher, because you get used to it after awhile and wish you had a little more. 
__________________
www.lykinsmotorsports.com
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11-01-2009, 06:18 AM
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CC Member
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Join Date: Jan 2007
Location: Chesterland,
oh
Cobra Make, Engine: Superformance #046 Dart 427w
Posts: 76
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Not Ranked
500 Hp is plenty for me. The car is driven only on the street. My build seems to be a proven formula. I want to keep it simple, and cost effective.
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11-01-2009, 02:11 PM
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CC Member
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Join Date: Sep 2008
Cobra Make, Engine:
Posts: 52
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Not Ranked
You might also want to wait and see what the new FRPP 427 crate engine might have to offer. Supposed to be in the 550 HP range also.
Still waiting to see what components they will be using.
I couldn't wait,and built my own Dart based 427 and it is proving to be a beast so far!
Last edited by Mus408; 11-01-2009 at 02:14 PM..
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11-01-2009, 05:42 PM
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CC Member
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Join Date: Dec 2003
Location: Framingham,
Ma
Cobra Make, Engine:
Posts: 228
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Not Ranked
Hi 427spr,
You can build a very streetable 427-W with either the DART OR new BOSS block. We just built a 408-W and it is very mild and made 491 hp & 515 ft lbs with very streetable manners. It idles nice and made over 400 ft lbs below 3000 rpm.
With a lite weight car, 500+ hp is one hell of a ride....
__________________
Forte's Parts Connection
40 Pearl St
Framingham, Ma. 01702
fortesparts.com
508 875 0016
In 1993 Mike made the first conversion of a Ford Tremec to GM 5-speed. It bolts to stock bellhousings w/out an adapter. The FE Tremec, the Mustang adjustable quadrant are originals from Mike.
One of 12 Tremec Elite Distributors worldwide for: T-5, T-56 Magnum & TKO-500 & TKO-600 ,Midshifter, Frt shifter, offset Vette shifter.
Est: 1981 selling performance parts to build your dream car...
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