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Author
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Topic: 427 from a 351W??
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mtucker
Journeyman Posts: 88
From: Wichita, KS
Registered: Oct 2002
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posted 01-02-2003 04:23 PM
   
Can it really be done? Can you really carve out another 76 cubes from a 351 when you can only get another 45 from a 302? Would a stock c4 handle it? What would the bore and stroke be?
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steve'66
Gearhead Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 01-02-2003 04:43 PM
Yes it can be done.
No a stock c-4 can't handle it, but a built one can.
It's a 4.030 std overbore with a 4.2" stroke.A 408w is a better compromize of rod ratio and piston height it has a 4.0" stroke. A 418 uses a 4.1" stroke. Also a 302 block is no match for a 351w block. The 351w has a taller deck allowing more room for the longer strokes. SteveW
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JCQuinn@work
Gearhead Posts: 422
From: Lakewood, CO, USA
Registered: Jun 2001
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posted 01-02-2003 05:26 PM
Dont forget that you can go to a larger overbore with some of the SVO and Dart blocks. 4.125 bore with a 4.00 stroke is about a 427. (actual 427.65 but you can round down)These blocks of course cost more but are also stronger. John
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SteveLaRiviere
Administrator Posts: 33371
From: Saco, Maine
Registered: May 99
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posted 01-02-2003 05:32 PM
How about 454?http://www.flatlanderracing.com/stroker351w454.html ------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150 Remember our sponsors, Mustangs Plus, NPD, Osborn Reproductions, and MyFordPerformance.com.
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steve'66
Gearhead Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 01-02-2003 05:33 PM
Yeah,With an svo block you can make a 454!
4.25" Stroke X 4.125 Bore But 427s and 454s are big block chebbies ain't they  
SteveW
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steve'66
Gearhead Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 01-02-2003 05:34 PM
You're too quick SteveL SteveW
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denny
Journeyman Posts: 57
From: Northfield NH USA
Registered: Jul 2000
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posted 01-02-2003 05:56 PM
Real 427's are FE fords. I expect to have to remind my foolish chevy friends but having to remind you guys come on??!!!!LOL Alsop 454 are 427 fords .030 over with 428 cranks. Looks like ford has everything covered as usual.------------------
D French
67 427 Fairlane(A/SA) 73 Mustang 351c
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Dubz
Gearhead Posts: 443
From: Manitoba Canada
Registered: Oct 2002
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posted 01-02-2003 06:24 PM
imagine a 454 out of a 351.....big block power with small block weight....MMMMMM
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steve'66
Gearhead Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 01-02-2003 06:30 PM
quote:
Originally posted by Dubz:
imagine a 454 out of a 351.....big block power with small block weight....MMMMMM
Yeah, with aluminum heads, intake and headers it'll weigh about the same as a stock 289. SteveW
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TomP
Gearhead Posts: 4812
From: Delta BC Canada
Registered: Dec 99
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posted 01-03-2003 01:54 PM
Actually no, with an SVO block and iron heads that 454" Windsor will weigh like an FE! With aluminum heads on each, close to the same ... the SVO 351 block is heavier than a 427 (200lbs) the heads are heavier and that only makes up for the FE's heavier crank, rods, and intake. The SVO block is unbelievably heavy, very stout piece though. I certainly can't recommend an offset 4.187 stroked 400 crank "427" , i've seen them break and the oil holes are right at the edge of the offset journals, weaking the throws a bunch.
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JCQuinn@work
Gearhead Posts: 422
From: Lakewood, CO, USA
Registered: Jun 2001
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posted 01-03-2003 03:38 PM
If you have a lot of money SVO has the alloy big bore block. I think that is what Steve Saleen is using for the all aluminum 351 based 427 he uses in the sports car he makes.John
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jsracingbbf
Gearhead Posts: 1677
From: Batesville,MS. , U.S.A.
Registered: Mar 2002
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posted 01-03-2003 03:44 PM
Why not just build a 385 series motor? It can be done for a resonable price. Assuming you can fit it into the engine compartment. Lower RPM, more Torque.  Longer lasting. Unless of course this is a motor built for a specific class/ rule requirement racing. ------------------
Jerry
69 Mustang Pro ET Drag
70 Mustang retired former footbrake car
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