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03-05-2012
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#1 |
  
Join Date: Feb 2010
Location: Pendleton, IN
Posts: 3,904
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VAC Leaks
Question????
Why doesn't anyone use compression fittings on the vac lines under the plenum? Either with plastic or even steel lines, in order to prevent un-needed plenum pulls????
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1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project |
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03-06-2012
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#2 | |
  
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: VAC Leaks
Quote:
And, then there is the "sans secondaries" approach to the problem...  Parts not used seldom break, and they don't cost much to replace!  & It runs so nice with that stuff "outta thar!"P.
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry Last edited by Paul Workman; 03-06-2012 at 04:45 AM. |
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03-06-2012
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#3 |
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Join Date: Feb 2010
Location: Pendleton, IN
Posts: 3,904
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Re: VAC Leaks
I plan to remove the secondaries as well.
It just seems that I hear so much about vac leaks, I was just thinking "compression fittings". May not be needed??
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1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project |
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03-06-2012
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#4 |
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Join Date: Apr 2009
Location: Prather, CA
Posts: 809
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Re: VAC Leaks
When I rebuilt my vacuum system, I just replaced any cracked plastic hose and any hard or brittle rubber connections (the secondaries vacuum solenoid too). And I put small, black zip-ties on any rubber to plastic vacuum hose connection where the plastic side didn't have a little barb or raised area to help keep the rubber part on.
I've put over 3,000 miles on now since I got my Z running and my vacuum system is still nice and tight. One time after being in a store for 30 - 40 minutes or so, when I turned the key on, the pump only ran for a couple seconds and then shut off. And I do a lot of 'spirited' driving!  So I think that most of the vacuum leak issues are with the cars that haven't ever had the plenum off, or had the vacuum system gone through and checked out thoroughly. Those that have, I would venture to say probably haven't really had any more vacuum leak issues (if any).
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[IMG]http://i13.photobucket.com/albums/a292/bdw18_123/_zr1netforumsigphoto.jpg[/IMG][B] 1990 Corvette ZR-1 [/B][I] White/Flame Red, #2299, mostly stock, 144K miles.[/I] -Cams timed to the '93-'95 405HP LT5 stock timing. -IAT sensor relocated to below front bumper. -Haibeck hoops installed in airduct. -OBX cat-back exhaust. [COLOR=DarkRed][B](SOLD - December 2012 [/B][/COLOR][COLOR=DarkRed][B]:hello:)[/B][/COLOR] 1993 Corvette Coupe Black/Black, 6-speed (SOLD - October 2009 :hello:) |
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03-06-2012
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#5 |
Join Date: Jul 2005
Location: Las Vegas, Nevada
Posts: 777
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Re: VAC Leaks
[QUOTE=So I think that most of the vacuum leak issues are with the cars that haven't ever had the plenum off, or had the vacuum system gone through and checked out thoroughly. Those that have, I would venture to say probably haven't really had any more vacuum leak issues (if any).[/QUOTE]
I agree. No problems since I replaced all the secondary stuff (with the exception of a new-out-of-the-box solonoid and a brand new actuator that went bad). I have reservations as to whether the car would pass smog with the secondaries removed.
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JB 1990 #148 Red/Saddle Haibeck AYBKG5 Chip/RC Engineering/Flowmasters/K&N/Samco/Fuzzy Dice :cheers: |
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03-07-2012
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#6 |
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Join Date: Feb 2010
Location: Pendleton, IN
Posts: 3,904
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Re: VAC Leaks
I'm fairly new to the game but soak up everything I can. It just seems that we talk about vac leaks a lot.
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1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project |
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03-07-2012
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#7 | |
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Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: VAC Leaks
Quote:
Following posts for some 4 years, & also having experienced a "little" of the "old ZR-1 Corvette" maladies myself, it occures to me that we should put together a DIY checklist for new ZR-1 owners. Sounds like a topic for an article (hint-hint) 
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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03-07-2012
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#8 |
 
Join Date: Jul 2005
Location: Cresson, TX
Posts: 970
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Re: VAC Leaks
Brett,
I'd love to have a system that requires less maintenance... Great idea... |
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03-07-2012
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#9 |
Join Date: Aug 2005
Location: Scottsdale, AZ
Posts: 2,452
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Re: VAC Leaks
Removed mine, less is better
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03-07-2012
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#10 |
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Join Date: Feb 2010
Location: Pendleton, IN
Posts: 3,904
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Re: VAC Leaks
I am removing the secondaries on mine, so hopefully, I can avoid any hissing noises. LOL
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1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project |
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Linear Mode
