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Anyone with a 770 cfm Truck Avenger

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crazyrc

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If anyone is runing the 770 cfm version of the holley, could you tell me where or how you supply vacuum to your brake booster. My 670 had a provision for the brake booster. (about 3/8") My 770 has no such hookup...please inform. /forums/images/graemlins/confused.gif
 
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If anyone is runing the 770 cfm version of the holley, could you tell me where or how you supply vacuum to your brake booster. My 670 had a provision for the brake booster. (about 3/8") My 770 has no such hookup...please inform. /forums/images/graemlins/confused.gif

[/ QUOTE ]Isn't there a vacume port on the rear of your intake manifold ?? If not, you could always get a carb spacer with a vacume port..... Just a thought.
 
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If anyone is runing the 770 cfm version of the holley, could you tell me where or how you supply vacuum to your brake booster. My 670 had a provision for the brake booster. (about 3/8") My 770 has no such hookup...please inform. /forums/images/graemlins/confused.gif

[/ QUOTE ]Isn't there a vacume port on the rear of your intake manifold ?? If not, you could always get a carb spacer with a vacume port..... Just a thought.

[/ QUOTE ]good plan /forums/images/graemlins/waytogo.gif
 
There should also be a spot for a threaded fitting on the manifold behind the carb IIRC.
 
There is a spot, but like you say I'll have to get spacer, because the carb sits too close to get a fitting in the manifold. Do you know of any manufacturers who make a spacer with a port?
 
TransDapt Performance Products, TRD-2103 on SummitRacing.com for $18.88. They call it a PCV fitting, but it should work.

Speaking of PCV, why not just get a plastic barbed "T" fitting and run the brake booster in with the PCV line.

A carb spacer changes tuning characteristics of the carb, and you may not like the results.
 
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There is a spot, but like you say I'll have to get spacer, because the carb sits too close to get a fitting in the manifold. Do you know of any manufacturers who make a spacer with a port?

[/ QUOTE ]Could you pull the carb, install a elbow fitting for the vac line, then reinstall the carb ?? Is there enough room for one of those ??
 
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There is a spot, but like you say I'll have to get spacer, because the carb sits too close to get a fitting in the manifold. Do you know of any manufacturers who make a spacer with a port?

[/ QUOTE ]Could you pull the carb, install a elbow fitting for the vac line, then reinstall the carb ?? Is there enough room for one of those ??

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I think there might be enough room, but a friend who was working on the truck with me doesn't think so...only one way to find out. Thanks for the replies.
 
I have one on my 454 bolted to a dual plain spred bore type manifold, so I have an adaptor to fit the holey. The local parts store had the adaptor in stock. I have had no problems with the booster hose but the carb was a wast of money, I'm not sure it betters my 30 year old Q-jet in any way and it certinly is not fuel injection
 
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