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porting your own heads

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Old Apr 3, 2007 | 09:22 PM
  #1  
mxcrazed's Avatar
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From: eastern mass
Car: 87 firebird none soon
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Axle/Gears: 2.73 10 bolt
porting your own heads

okay so hear is the deal i posted something about my 350 with 305 heads the other day and was told to get the 14101081 casting well it turns out that there are a set of those heads on my 305 thats in my car now so i will be removing them and switching engines so i was wondering if it would be a good idea to port them myself while they are out or if it is just a headache considering they are cast iron please give me some feedback or a how to or just call me stupid for even considering it im sure it will all help.
thanks for reading
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Old Apr 4, 2007 | 09:42 PM
  #2  
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From: Baton Rouge, LA
Car: 89 RS
Engine: 305
Transmission: th350
Re: porting your own heads

The 081 heads arent good. You should look for some older 305 ho heads (416 heads).
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Old Apr 4, 2007 | 09:44 PM
  #3  
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: porting your own heads

Originally Posted by 1320_Guy
The 081 heads arent good. You should look for some older 305 ho heads (416 heads).
081s ARE 416s with center bolt valve covers, self aligning rockers, and the newer 87 up revised canted center bolt angle.

14022601s beat out BOTH of them.
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Old Apr 4, 2007 | 10:02 PM
  #4  
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From: eastern mass
Car: 87 firebird none soon
Engine: None
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Axle/Gears: 2.73 10 bolt
Re: porting your own heads

well i already have the 081's and dont really have money but i have a 600 cfm edelbrock and 081's flow 195 cfm at .500 lift on a bench test so do i really need to do anything to them because those are the ones im using unfortunately unless domeone can donate some also what do i do to sort of refurbish my 081's?
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Old Apr 5, 2007 | 04:28 PM
  #5  
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From: Casselberry, FLA
Car: 88 V6 'bird/89TBI bird/85 T/A
Engine: 2.8/TBI/TPI
Transmission: V8 T-5/700R4 x2
Axle/Gears: 3.42 open/2.73 open/ 3.27 9 bolt
Re: porting your own heads

You aren't gonna brake your budget if you go junkyard hunting and get yourself some TPI heads. I don't know the numbers, they may be the numbers listed above, but they are worth it. They make an improvement just swapping them to a 305 with TBI that you can feel. You won't spend much money; it will just take time to find them - but you CAN FIND THEM. Take your time now while stuff is apart.

You'll be happy you did...
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Old Apr 5, 2007 | 06:15 PM
  #6  
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
081's are TPI heads. Also used on LG4 in '87.
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Old Apr 5, 2007 | 06:24 PM
  #7  
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From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
Re: porting your own heads

Holy cow.... Thanks Five7, sometimes it's painful to watch...

Yes port them yourself. Read the thread by sitting bull, and posts by F-bird'88 and the others that have posted about it. Cast iron is just fine to port. It's worth it.
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Old Apr 5, 2007 | 11:32 PM
  #8  
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
On the Board is this forum called "FAQ" - that stands for "Frequently Asked Questions". In it you'll find posts about things that are often asked - such as, "Differences between 305's and performance tips". Interestingly enough, you'll find information about what heads are the best to use, porting them, etc., etc., etc.

Another tactic is a simple search for things such as "416", "081", "181", "601", "porting", etc. Amazing what will come up.
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Old Apr 6, 2007 | 01:54 PM
  #9  
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Car: 87 firebird none soon
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Axle/Gears: 2.73 10 bolt
Re: porting your own heads

thanks alot guys you were a huge help
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