Quick Brake Booster Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dmack91 · 02-12-2011, 02:44 PM

I am putting a power brake booster on my truck. I read on a previous thread that tapping into the vacuum fitting on the intake runner can lead to burning a valve/piston if the booster has a leak, so you want to tap into vacuum at the carb base.

The only tap I have on the carb base has the PCV hose going to it.

Would I be OK tapping between the PCV valve and the carb (T fitting), or could it cause problems with the booster?

Thanks for the help.

So.Cal.Super · 02-12-2011, 03:57 PM

is there a port on the back of the carb that has a plug in it you can remove and use?

dmack91 · 02-12-2011, 04:25 PM

I don't see a port back there (should be large 3/8" or so I thought). Just the one on the front that the PCV goes into.

Q-jet carb.

Thanks

So.Cal.Super · 02-12-2011, 04:43 PM

this is what I have, only thing is maybe earlier q-jet didn't have it. this i'm not sure of.

dmack91 · 02-12-2011, 05:29 PM

I tapped it into the PCV for now and will leave it unless I get info that it is hazardous.

I will say, power brakes are a very nice option to have.

02-12-2011, 02:44 PM	#1
dmack91 Registered User Join Date: Jan 2011 Location: Redmond, OR Posts: 760	Quick Brake Booster Question I am putting a power brake booster on my truck. I read on a previous thread that tapping into the vacuum fitting on the intake runner can lead to burning a valve/piston if the booster has a leak, so you want to tap into vacuum at the carb base. The only tap I have on the carb base has the PCV hose going to it. Would I be OK tapping between the PCV valve and the carb (T fitting), or could it cause problems with the booster? Thanks for the help. __________________ 68 Chev C20- son has it now 83 K20 - bought from son 70 C20 - in progress

02-12-2011, 03:57 PM	#2
So.Cal.Super It'll Buff Out! Join Date: Apr 2007 Location: San Diego Posts: 603	Re: Quick Brake Booster Question is there a port on the back of the carb that has a plug in it you can remove and use? __________________ "Instructions are just another mans opinion" Become a Supporting Member http://67-72chevytrucks.com/vboard/payments.php Man Card Rules http://67-72chevytrucks.com/vboard/s...d.php?t=634550 72 Chevy Cheyenne Super 400 LWB

02-12-2011, 04:25 PM	#3
dmack91 Registered User Join Date: Jan 2011 Location: Redmond, OR Posts: 760	Re: Quick Brake Booster Question I don't see a port back there (should be large 3/8" or so I thought). Just the one on the front that the PCV goes into. Q-jet carb. Thanks __________________ 68 Chev C20- son has it now 83 K20 - bought from son 70 C20 - in progress

02-12-2011, 04:43 PM	#4
So.Cal.Super It'll Buff Out! Join Date: Apr 2007 Location: San Diego Posts: 603	Re: Quick Brake Booster Question this is what I have, only thing is maybe earlier q-jet didn't have it. this i'm not sure of. Attached Images __________________ "Instructions are just another mans opinion" Become a Supporting Member http://67-72chevytrucks.com/vboard/payments.php Man Card Rules http://67-72chevytrucks.com/vboard/s...d.php?t=634550 72 Chevy Cheyenne Super 400 LWB

02-12-2011, 05:29 PM	#5
dmack91 Registered User Join Date: Jan 2011 Location: Redmond, OR Posts: 760	Re: Quick Brake Booster Question I tapped it into the PCV for now and will leave it unless I get info that it is hazardous. I will say, power brakes are a very nice option to have. __________________ 68 Chev C20- son has it now 83 K20 - bought from son 70 C20 - in progress

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