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intake manifold vac. #1206236 03/29/12 10:09 PM 03/29/12 10:09 PM
Joined: May 2005 Posts: 2,295 dark side of the moon D Dougsmopars OP top fuel
Dougsmopars OP top fuel D Joined: May 2005 Posts: 2,295 dark side of the moon	Got my new 750 Quick carb. In the booklet it says for power brakes use vac at rear of carb not one in an intake runner like the stock intake. Is there a difference in vac between the two positions?

Re: intake manifold vac. [Re: Dougsmopars] #1206237 03/30/12 12:21 AM 03/30/12 12:21 AM
Joined: Oct 2005 Posts: 797 arizona, usa L lokalik super stock
lokalik super stock L Joined: Oct 2005 Posts: 797 arizona, usa	do you have a vac gauge? if so check at both locations. remember power brakes means that you do not to push as hard on the pedal. most stock motors will pull about 14in of vac, enough for brakes and other stuff. you have to wonder why your carb would spec out a vac source, i believe stock would have from the manifold. unless the carb has a vac pump on it, why would it produce more vac than the intake manifold?

Re: intake manifold vac. [Re: Dougsmopars] #1206238 03/30/12 02:37 AM 03/30/12 02:37 AM
Joined: Aug 2003 Posts: 43,285 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,285 Bend,OR USA	Quote: Got my new 750 Quick carb. In the booklet it says for power brakes use vac at rear of carb not one in an intake runner like the stock intake. Is there a difference in vac between the two positions? Is your intake a dual plane or single plane? If single it won't matter which port you use, if dual plane Quikfuel may be thinking that using the stock location may limit the vacume to 1/4 of the total engine vacume, I wouldn't bet on that Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: intake manifold vac. [Re: Cab_Burge] #1206239 03/30/12 03:10 AM 03/30/12 03:10 AM
Joined: Jul 2005 Posts: 384 Australia M Mcode69 enthusiast
Mcode69 enthusiast M Joined: Jul 2005 Posts: 384 Australia	The other question is where do you put the PCV, it doesn't leave a lot of choices apart from sucking all the engine fumes into one cylinder....not the ideal scenario!

Re: intake manifold vac. [Re: Cab_Burge] #1206240 03/30/12 05:43 PM 03/30/12 05:43 PM
Joined: May 2005 Posts: 2,295 dark side of the moon D Dougsmopars OP top fuel
Dougsmopars OP top fuel D Joined: May 2005 Posts: 2,295 dark side of the moon	Stock dual plane cast iron intake.

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