Power booster vacuum 235 I6? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

soba_03 · 02-25-2008, 01:24 AM

Ok I have the booster mounted and spindles and rotors. Where can I tap off for the vaccum? Thinking about using the vacuum port form carb where the vacuum advance comes off. I need thoughts and Ideas please.

Thanks...

mbgmike · 02-25-2008, 03:10 AM

ON a 216 you can just tap off the vacuum conn for the wipers on the intake.

wild one · 02-25-2008, 06:34 AM

Any place off of the intake manifold is fine, you want full vacuum to the booster
at all times. If there is a large nipple off of the base of your carb you can use/tap into that as well.

Fred T · 02-25-2008, 06:49 AM

There should be a tap on the side of the intake which will give you the most vacuum for your brakes.

soba_03 · 02-25-2008, 10:24 AM

Fred,

That is where I wanted to go. But the plug has been in there since 61 when it was new and well even with some heat applied I'm afraid that it's going to strip out or crack. It's a tight SOB. So I was thininking about tapping off the vaccum port at the base of the carb where the advance for the distributor goes. I expect that it would not affect timing to tap off at that point as well.

VDOG · 07-14-2008, 02:34 PM

Ok I got the same problem, but I have an Edelbrock 1406 on top of a Weiland manifold, where do I hook up the booster, cause there is no port behind the carb.

greg64 · 07-15-2008, 12:51 AM

Quote:

Originally Posted by soba_03

Fred,

That is where I wanted to go. But the plug has been in there since 61 when it was new and well even with some heat applied I'm afraid that it's going to strip out or crack. It's a tight SOB. So I was thininking about tapping off the vaccum port at the base of the carb where the advance for the distributor goes. I expect that it would not affect timing to tap off at that point as well.

I cracked a 250 manifold trying to get one of those out. From that experience, I'd leave the stock plug alone, and drill and tap a new port for your brake booster. The manifold, obviously being cast iron, is an easy drill & tap.

Fred T · 07-14-2008, 07:59 PM

There is a port on the intake. Looking from the front of the engine, it is behind the carb on the left. You probably have a plug in the hole. You can go to the hardware store and buy plumbing fittings.

02-25-2008, 01:24 AM	#1
soba_03 Registered User Join Date: Sep 2007 Location: Fairdale, Kentucky Posts: 560	Power booster vacuum 235 I6? Ok I have the booster mounted and spindles and rotors. Where can I tap off for the vaccum? Thinking about using the vacuum port form carb where the vacuum advance comes off. I need thoughts and Ideas please. Thanks... Attached Images

02-25-2008, 03:10 AM	#2
mbgmike Registered User Join Date: Aug 2005 Location: Pasadena,Tx /Pto Pta DR Posts: 5,415	Re: Power booster vacuum 235 I6? ON a 216 you can just tap off the vacuum conn for the wipers on the intake.

02-25-2008, 06:34 AM	#3
wild one Registered......... Join Date: May 2006 Location: Livermore,CA Posts: 288	Re: Power booster vacuum 235 I6? Any place off of the intake manifold is fine, you want full vacuum to the booster at all times. If there is a large nipple off of the base of your carb you can use/tap into that as well. __________________ 1966 C10 panel-400 small block/TH 350 combo Nothing is fool proof to a talented fool! Popcorn: Pops at exactly 444 degreese Expands to 44 times it's original size Has a 4 year shelf life

02-25-2008, 06:49 AM	#4
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Re: Power booster vacuum 235 I6? There should be a tap on the side of the intake which will give you the most vacuum for your brakes. Attached Images __________________ Fred There is no such thing as too much cam...just not enough engine.

02-25-2008, 10:24 AM	#5
soba_03 Registered User Join Date: Sep 2007 Location: Fairdale, Kentucky Posts: 560	Re: Power booster vacuum 235 I6? Fred, That is where I wanted to go. But the plug has been in there since 61 when it was new and well even with some heat applied I'm afraid that it's going to strip out or crack. It's a tight SOB. So I was thininking about tapping off the vaccum port at the base of the carb where the advance for the distributor goes. I expect that it would not affect timing to tap off at that point as well.

07-14-2008, 02:34 PM	#6
VDOG Grand PooBaa Member Join Date: Jan 2001 Location: LA, CA Posts: 5,302	Re: Power booster vacuum 235 I6? Ok I got the same problem, but I have an Edelbrock 1406 on top of a Weiland manifold, where do I hook up the booster, cause there is no port behind the carb.

07-14-2008, 07:59 PM	#8
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Re: Power booster vacuum 235 I6? There is a port on the intake. Looking from the front of the engine, it is behind the carb on the left. You probably have a plug in the hole. You can go to the hardware store and buy plumbing fittings. __________________ Fred There is no such thing as too much cam...just not enough engine.

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