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Author
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Topic: alum heads and ford blocks
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stroker man
Gearhead Posts: 113
From: Denville NJ USA
Registered: Mar 2002
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posted 01-23-2003 07:35 PM
   
I dont know if its true but alum heads on stock ford blocks arent to good because they dont have enough head bolts, only eight on windsors, just seeing if anybody has to retorque them often. dont cheevys have like 15 bolts?
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steve'66
Gearhead Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 01-23-2003 07:43 PM
You've been peeking into Chebbie site haven't you.  LOLFord windsors have 10 big 1/2" diameter bolts, plenty to hold the aluminum or iron heads down. Once you get over 800 h.p. you might have a problem, but I don't think that's really a problem for most of us.  SteveW
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RADRIDE
Gearhead Posts: 240
From: Va.Beach, Va.
Registered: Aug 2002
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posted 01-23-2003 07:43 PM
Have the AFR alum on mine and after warm up and cool down tried re-torque as suggested by AFR I didnt loose anything it clicked right on the numbers.
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RADRIDE
Gearhead Posts: 240
From: Va.Beach, Va.
Registered: Aug 2002
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posted 01-23-2003 07:47 PM
I guess I should have mentioned AFR gives a different torque pattern than normal with the top bolts getting 10 xtra lbs.I also have studs holding them down.
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V8 Thumper
Gearhead Posts: 3467
From: Orange, Ca. United States of America
Registered: Dec 2001
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posted 01-23-2003 07:57 PM
The longer bolts do get more load; longer fasteners absorb more torsional force. I run aluminum heads on a 7000 rpm 10:1 Windsor without any head gasket problems. I do however use the highest quality head gaskets. Don't believe everything you hear.Ask a machinist how bad a chebbie block contorts under the load of 32 head bolts ...or how bad the block bananas when the bellhousing is torqued on ------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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n2oMike
Gearhead Posts: 1547
From: Spencer, WV
Registered: Jan 2001
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posted 01-23-2003 10:13 PM
quote:
Originally posted by steve'66:
Ford windsors have 10 big 1/2" diameter bolts,
Small block ch*vys use seventeen 7/16" bolts. 351W's have ten 1/2" head bolts. 460's use ten HUGE 9/16" bolts. However 289/302's use ten smaller 7/16" bolts, and are borderline for performance use. If nitrous is planned, get the best bolts/studs available, and keep the timing in check, and burn the best fuel available. Either that, or convert to 1/2" 351W bolts like I did. Good Luck! ------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
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