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Bowtie Heads

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Old Jul 15, 2003 | 05:39 PM
  #1  
Dave Y's Avatar
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
Engine: 4.3L V6
Transmission: 4L60E
Bowtie Heads

Are they good heads?
I just bought a set used
pics attached
Attached Thumbnails Bowtie Heads-p7140018.jpg  
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Old Jul 15, 2003 | 05:39 PM
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Dave Y's Avatar
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
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Transmission: 4L60E
pic 2
Attached Thumbnails Bowtie Heads-p7140017.jpg  
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Old Jul 15, 2003 | 05:40 PM
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Dave Y's Avatar
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
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pic 3
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Old Jul 15, 2003 | 05:40 PM
  #4  
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
Engine: 4.3L V6
Transmission: 4L60E
opps
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Old Jul 15, 2003 | 05:41 PM
  #5  
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
Engine: 4.3L V6
Transmission: 4L60E
pic 4
Attached Thumbnails Bowtie Heads-p7140015.jpg  
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Old Jul 15, 2003 | 05:42 PM
  #6  
Dave Y's Avatar
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
Engine: 4.3L V6
Transmission: 4L60E
pic 5
Attached Thumbnails Bowtie Heads-p7140014.jpg  
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Old Jul 15, 2003 | 05:43 PM
  #7  
Dave Y's Avatar
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
Engine: 4.3L V6
Transmission: 4L60E
pic 6
Attached Thumbnails Bowtie Heads-p7140013.jpg  
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Old Jul 15, 2003 | 05:43 PM
  #8  
Dave Y's Avatar
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
Engine: 4.3L V6
Transmission: 4L60E
pic 7
Attached Thumbnails Bowtie Heads-p7140012.jpg  
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Old Jul 15, 2003 | 05:44 PM
  #9  
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
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Transmission: 4L60E
last one
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Old Jul 15, 2003 | 06:07 PM
  #10  
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From: Klamath Falls Or 97603
14011034........................Bowtie, cast iron, 64cc chambers,
184cc port volume, angle plug,
"Phase II" head

I don't know what Phase II means so that is all the help I can be.
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Old Jul 15, 2003 | 06:11 PM
  #11  
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
They're good heads. That was the "standard issue" sportsman racing GM head about 15 years ago. With mild porting they're good to near 500 HP.

The springs on them are too small.

What valves are in them? What work have they had done to them? Can't tell squat from those pics.
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Old Jul 15, 2003 | 06:18 PM
  #12  
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
Engine: 4.3L V6
Transmission: 4L60E
I have them apart now, they seem tohave no porting done to them, the intake valves are 2.02 (need to measure the exhaust), these springs, how can I find out what lift they can handle?
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Old Jul 15, 2003 | 07:44 PM
  #13  
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
What valves are they? I can see they're 2.02", that's just the stock size in those, nothing special. Are they undercut stem? titanium? .100" long? etc. etc. There's alot more to a performance valve than its head diameter.
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Old Jul 17, 2003 | 06:12 PM
  #14  
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
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they're undercut stem and +.100, other that that, right now I don't know
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