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Author Topic:   Cylinder head steam holes 302???
MAV
Gearhead

Posts: 226
From: Macon,Georgia, U.S.A.
Registered: Mar 2002

posted 03-13-2003 11:37 PM     Click Here to See the Profile for MAV   Click Here to Email MAV     Edit/Delete Message   Reply w/Quote
I just got a new (OLD) set of 1970 302
heads for my `89 block 5.0 . I want to know you guys opinions on if I need to drill the steam holes into the block so that they match the ones on the heads. I`m talking about the very small ones that are above each cylinder as seen on a Fel pro head gasket 1011-1. This is a street strip engine.

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http://maverickgrabber.iwarp.com

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steve'66
Gearhead

Posts: 9472
From: Sonoma,CA,USA
Registered: Mar 2000

posted 03-14-2003 12:03 AM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Mav,

Check the water jackets in the heads. I think you can drill the heads to acess the water jackets in them. That's what I did when putting 351w heads on a 289. Not sure about your combo though,

SteveW

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bluestreek
Gearhead

Posts: 1724
From: Athens,GA
Registered: Jul 2001

posted 03-14-2003 08:06 AM     Click Here to See the Profile for bluestreek   Click Here to Email bluestreek     Edit/Delete Message   Reply w/Quote
SteveW is right. Use the late model gasket as a template for the holes. The engine will run cooler for it.

Dan

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1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, TFS alum. heads, ported Stealth 8020 intake, CompCams Xtreme Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi.
e.t. 12.50 @ 112 mph

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SteveLaRiviere
Administrator

Posts: 44889
From: Saco, Maine
Registered: May 99

posted 03-14-2003 08:08 AM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
You sure you want to use those heads?

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'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150

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MAV
Gearhead

Posts: 226
From: Macon,Georgia, U.S.A.
Registered: Mar 2002

posted 03-14-2003 04:54 PM     Click Here to See the Profile for MAV   Click Here to Email MAV     Edit/Delete Message   Reply w/Quote
What do you mean am I sure Steve...
Is there something wrong with them?
They have been milled to 55cc chambers,Have 1.94/1.60 small stem valves,studs/plates,
smoothed intake runners ,professionaly ported "D" style exhaust ports(they look nice ) and new Comp
springs locks and retainers. I figure they`ll make pretty good power.

[This message has been edited by MAV (edited 03-14-2003).]

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SteveLaRiviere
Administrator

Posts: 44889
From: Saco, Maine
Registered: May 99

posted 03-14-2003 05:29 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
I was just thinking of the small valves and intake ports, but it looks like you have that covered.

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'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150

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[email protected]
Gearhead

Posts: 898
From: Lakewood, CO, USA
Registered: Jun 2001

posted 03-14-2003 05:52 PM     Click Here to See the Profile for JCQuinn@work   Click Here to Email JCQuinn@work     Edit/Delete Message   Reply w/Quote
He has the valve size covered but the ports are still too small for good power unless the motor is around 221 Cubes. Probably will work OK if the motor is not going much above 6000 RPM.

I've spent hundreds of hours trying to get early small block heads to go fast. They only work on a couple of SS combinations (Alex and his friends)

John

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MAV
Gearhead

Posts: 226
From: Macon,Georgia, U.S.A.
Registered: Mar 2002

posted 03-14-2003 06:08 PM     Click Here to See the Profile for MAV   Click Here to Email MAV     Edit/Delete Message   Reply w/Quote
Well...The `65 289 heads I`m replacing were on a 12.8 :1 302 with a solid comp cams .576/.570 255/[email protected] 106ls
and an old torqer intake with a holley 750dp. the car has a c-4 /4.88 gears and 29 inch slicks,and 3050 ibs with me in it... went 11.47.
A buddy of mine had a fairmont with the same cam,pistons,and intake, but with `69` windsor heads and a 4.30 gear...went 11.60 on the motor and 10.92 on a 150 shot. I know these old heads are considered "Old school" by alot of people, but Im on a very tight budget and the numbers above dont seem all that bad to me

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http://maverickgrabber.iwarp.com

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MAV
Gearhead

Posts: 226
From: Macon,Georgia, U.S.A.
Registered: Mar 2002

posted 03-15-2003 10:47 AM     Click Here to See the Profile for MAV   Click Here to Email MAV     Edit/Delete Message   Reply w/Quote
Alex what do you think about drilling the steam holes?

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http://maverickgrabber.iwarp.com

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Tea'sGrabber
Gearhead

Posts: 276
From: Seattle, Wash.
Registered: Feb 2003

posted 03-15-2003 10:53 AM     Click Here to See the Profile for Tea'sGrabber   Click Here to Email Tea'sGrabber     Edit/Delete Message   Reply w/Quote
I have an 90 5.0 block and 68gt heads. We drilled them and I have had 0 problems....

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Todd 71 Mav Grabber All orig 306 cu.in. Cast Iron heads. Carillo Rods.Best et. 10.71 @ 124 thru the mufflers.

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