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Vacuum lines (1/6)
 5/25/19 3:39pm
cinorLifetime Member
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, - Canada

Vette(s):
1975 L48 Stingray 1992 LT1


Joined: 12/24/2013
Posts: 392

Brawler carb, brake booster to lge port at back, distributor to port by fuel site glass. 2 ports in front and 1  on intake ? 



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Re: Vacuum lines (2/6)
 5/26/19 9:44am
NorskyLifetime Member
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Twin Lakes, CO - USA

Vette(s):
SOLD - "The Toy" - 1970 Convertible
SOLD - "The Beast" - 1990 ZR-1 (#682)
"BLKBRRD" - 1978 Trans Am, 400ci/225hp, 4 spd, Black w/black interior, Hurst t-tops


Joined: 1/23/2002
Posts: 6838

Hey Cindy - do you have an AIM for your car?  That should have all the vacuum hose routing diagrams in it.  Another source would be a GM Service manual.  The aftermarket manuals (Chiltons/Haynes/etc) might have them as well but the AIM or the GM Service manual would be my first choices.



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Jim Olson 

"The Toys"...!!!  Save the Wave!

Where I've been in a Corvette...!!!

Re: Vacuum lines (3/6)
 5/26/19 9:53am
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 19646

If this is an automatic trans, you'll need a vac line to the modulator, which would come from the intake. You also need vac to the interior of the car for the HVAC system, and that can run off of one of the front vac fittings on the carb, assuming both of those fittings are "full" vac sources, and not "ported". Ported vac is only there with the throttle open, compared to full time vacuum that is always present.(for anything other than wide open throttle).

Was that your question?



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Re: Vacuum lines (4/6)
 5/26/19 12:52pm
cinorLifetime Member
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, - Canada

Vette(s):
1975 L48 Stingray 1992 LT1


Joined: 12/24/2013
Posts: 392

Jim i have changed to much so it is good for most have a brawler carb which is just a little different. I think i have most figured not sure where to tie in line from cannister. No vac lites anymore so should just be heater im thinkin from interior.



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Re: Vacuum lines (5/6)
 5/26/19 4:21pm
NorskyLifetime Member
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Twin Lakes, CO - USA

Vette(s):
SOLD - "The Toy" - 1970 Convertible
SOLD - "The Beast" - 1990 ZR-1 (#682)
"BLKBRRD" - 1978 Trans Am, 400ci/225hp, 4 spd, Black w/black interior, Hurst t-tops


Joined: 1/23/2002
Posts: 6838

On "BLKBRRD" there was a line from the charcoal canister to a vacuum port on the Q-Jet to pull from the canister to the carb.  Three other lines to the canister were vent lines from the fuel tank (1) and the carb (2).



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Jim Olson 

"The Toys"...!!!  Save the Wave!

Where I've been in a Corvette...!!!

Re: Vacuum lines (6/6)
 5/26/19 7:57pm
cinorLifetime Member
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, - Canada

Vette(s):
1975 L48 Stingray 1992 LT1


Joined: 12/24/2013
Posts: 392

I was thinking i could t it in same line ss pcv then to intake



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