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10-27-2013, 10:13 PM
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#1 |
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Senior Member
 
Join Date: Feb 2012
Location: chillicothe, illinois
Posts: 690
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no vacuum
I have a big muther thumper in my 468 big block, I have no vacuum for my power brakes. Anyone have ideas on this problem?
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10-27-2013, 10:19 PM
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#2 |
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Senior Member
Join Date: Aug 2008
Location: Cedar Park, Texas
Posts: 7,500
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Re: no vacuum
vacuum resevoir or hydro boost power brake booster off newer truck/ aftermarket
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10-27-2013, 10:21 PM
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#3 |
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Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,280
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Re: no vacuum
You have checked for leaks I assume? Both at the intake and the carb base? How much is none have you put a gauge on it to see where you are? That is kinda rare with the Comp cams stuff.Everything I have ever cammed using their stuff always made a good vac signal. You may have to go to a vac resivoir or a hydroboost. if you don't have a leak. The hydroboost would insure you always have braking ability. Jim
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10-27-2013, 10:44 PM
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#4 |
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Senior Member
Join Date: Feb 2012
Location: chillicothe, illinois
Posts: 690
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Re: no vacuum
I am sure there is no vacuum leak. I can pull the power booster hose off and it barely changes idle. big mutha thumper has a lot, I mean a lot of duration and overlap.
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10-27-2013, 10:48 PM
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#5 |
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Registered User
Join Date: Jan 2013
Location: Mickleton, NJ
Posts: 1,776
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Re: no vacuum
Too much cam will do that.
__________________
Shawn 1970 Chevy C-10 SWB, 350, TKO 600 5 speed My build http://67-72chevytrucks.com/vboard/s...d.php?t=559881 |
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10-27-2013, 10:54 PM
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#6 |
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Registered User
Join Date: Dec 2012
Location: Chandler AZ
Posts: 1,149
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Re: no vacuum
vacuum pump like THIS ONE
__________________
1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9 |
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10-28-2013, 02:10 AM
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#7 |
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Registered User
Join Date: Jun 2013
Location: kingman az
Posts: 573
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Re: no vacuum
All the mutha cams have poor vacuum. You will have to use a vacuum pump
__________________
1976 k20, 350 built, 44/14 axles 1968 c10 6.5 turbo diesel,t5 trans 1977 gmc c3500 dually, crew, 4-53t, 5&3 trans http://67-72chevytrucks.com/vboard/s...d.php?t=591188 |
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10-28-2013, 09:38 AM
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#8 |
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2WD Jimmy
Join Date: Mar 2005
Location: Davis County, Utah
Posts: 2,565
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Re: no vacuum
If you can afford it, go with the Hydroboost. CPP has the setup.
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10-28-2013, 10:31 AM
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#9 | |
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Account Suspended
Join Date: Jan 2007
Location: Tucson
Posts: 2,183
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Re: no vacuum
Quote:
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