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12-21-2013
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#21 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: Lots of snow so starting porting some heads
 The picture above is the primary...you can see it doglegs and acts as a port swirl generator.....the safest area is really to the outside of the port, although you still risk hitting the head bolt.
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 12-21-2013 at 08:37 PM. |
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12-23-2013
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#22 |
 Join Date: Jan 2004
Location: Portland, OR
Posts: 1,047
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Re: Lots of snow so starting porting some heads
Looking good Lee, do you remember the thread I did a few years ago... might be some helpful info in there for you www.zr1.net/forum/showthread.php?t=13497
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Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 Last edited by Locobob; 12-23-2013 at 12:45 AM. |
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12-23-2013
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#23 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: Lots of snow so starting porting some heads
Flat Edge Exhaust Divider, supposedly GM Engineers said it was worth 6hp
 
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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12-23-2013
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#24 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,683
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Re: Lots of snow so starting porting some heads
That's part of what GVD did to the heads I have. GVD commented on that a few years ago at BG.
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