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03-17-2009
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#21 |
 Join Date: Jan 2004
Location: Portland, OR
Posts: 1,047
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Re: Head Porting
Paul: The siamesed plenum/injector housings were done on purpose. You can read up on the process in this old post from the other forum http://forums.*************.com/c4-z...ore-power.html
Jim: Sounds like the HP bug bit you pretty hard, should see a big difference with the new mods. I'm not a big fan of open loop only chips. Running rich in part throttle driving conditions is going to dirty up the motor. Emissions testing will also be a problem if you are in an area that requires it. I'm not an expert on the subject though. I'd suggest starting a thread on the topic, we have some folks here who are quite knowledgeable in regards to tuning.
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Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
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03-18-2009
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#22 |
Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,667
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Re: Head Porting
Rob,killer work.
 Pete
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'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage |
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03-28-2009
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#23 |
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Join Date: Jan 2004
Location: Portland, OR
Posts: 1,047
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Re: Head Porting
All done, here is the finished product:
Gasket trimming, note the primary on the right hasn't been trimmed yet so you can see the increase in size.     
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Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
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03-28-2009
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#24 |
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Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,667
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Re: Head Porting
Nice,very nice.
Good work Bob The exhaust ports WOW Pete
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'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage |
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03-28-2009
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#25 |
Join Date: Dec 2005
Posts: 688
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Re: Head Porting
The craftsmanship is second to none Rob, VERY WELL DONE!
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03-28-2009
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#26 |
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Join Date: Feb 2009
Location: Canada
Posts: 309
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Re: Head Porting
the Sistine chapel of porting!
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03-29-2009
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#27 |
Join Date: Sep 2006
Location: lone pine and mammoth lakes
Posts: 1,406
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Re: Head Porting
i to agree that this is some of the finest work i have ever seen .i really like the dowling the the assemblys to ensure allignment
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03-29-2009
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#28 |
 
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,156
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Re: Head Porting
WOW BOB!!!
that looks awesome
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978 |
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03-30-2009
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#29 |
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Join Date: Aug 2005
Posts: 115
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Re: Head Porting
Dem's shiney AND purdy!
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03-30-2009
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#30 |
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Join Date: Jan 2004
Location: Portland, OR
Posts: 1,047
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Re: Head Porting
Kind of a shame they're going back on the motor just to get all dirty again. Maybe I'll just hang-um on the wall to stare at.... nah.
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Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
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Linear Mode
