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Author
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Topic: 289 heads advice wanted
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nash
Journeyman Posts: 96
From: Nashville, TN, USA
Registered: Nov 2000
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posted 02-06-2004 12:02 PM
   
I have discovered that I will need to take my stock 1967 289 heads to the machine shop to have them machined to accept bigger valve springs for my new retro roller cam. The heads had new valves and stock springs put in about 2 years ago. While they are at the machine shop would you recommend that I have anything else done to them to improve performance? Or would I be better off looking for a new set of replacement heads? I am looking to increase performance but also keep it on a budget. I don't want to break the bank on a new set of aluminum heads but I also wasn't impressed with these same heads on my last 289. The rest of the engine includes a holley 600 cfm, edelbrock performer maifold, flat top pistons and hipo manifolds.
Thanks for all the help.
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SteveLaRiviere
Administrator Posts: 42859
From: Saco, Maine
Registered: May 99
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posted 02-06-2004 12:14 PM
Have they been portmatched to your intake and cleaned up port wise?------------------
'70 Mustang Mach 1 351C 4V/FMX/3.25 Open
'70 Mustang Convertible 250 I6/3 speed/2.79 Open
'72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
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indyphil
Gearhead Posts: 2354
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 02-06-2004 12:49 PM
Remove exhaust thermactor bumps, that shouldnt cost too much and helps flow. No-body has told me how much hp its worth though.------------------
'68 coupe 289 C code
66 heads, edel 600cfm carb, performer intake, dual exhaust http://www.geocities.com/ottouk_77/68mustang.htm
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nash
Journeyman Posts: 96
From: Nashville, TN, USA
Registered: Nov 2000
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posted 02-06-2004 01:08 PM
The heads are stock. I had them on another engine and I am swapping them over to another engien that I am building with a retro roller cam. The cam spec call for a larger than stock dual valve spring so I have to either have these machined or move on to soemthing else. I was thinking since they will already have to go to the machine shop what would be wise to do them. However, I don't want to sink a bunch of money when I would be better of going to some kind of aftemarket head.
Thanks
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Moneymaker
Administrator Posts: 25539
From: Lyons, IL, USA
Registered: May 99
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posted 02-06-2004 05:26 PM
Crane makes a conical spring that does not require machining.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,& '04
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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