Are those two vacuum lines going to the transmission independent inputs to the transmission? The vacuum lines to the transmission tell the transmission's vacuum modulator how hard the engine is working. I have an Edelbrock performer RPM and it does have the large vacuum port on the back and that's where my transmission line used to go but the Holley carb is in the way of that now. Transmission vacuum line to carb control. Winter Blowout Sale – Up To 86% Off. The other valve cover has a breather on it. The other valve cover will have the pcv valve, which should be hooked to the big port on the back of the carb.
One of the posters above thinks it may be a second input to the vacuum modulator. Footage taken from Holley Carburetor Installation & Tuning DVD. Secondly, most "experts" suggest using manifold vacuum (under the blades) for distributor advance rather than "ported" vacuum. Transmission vacuum line to carb conversion. There are a few good explanations available on the internet. Posted: Sep/16/2012 at 3:28pm. Can I just do it this way with a T hooked up to the big port on the back of the carb? There are some instances of vacuum modulators with two inputs. Thanks @JayWB … I'm aware that there's a vacuum line input to the C4 transmission from the intake manifold, for use by the vacuum modulator or vacuum valve I think is what Ford calls it.
A/T fluid in the power brake booster seems like a real long shot to me. But I was curious why there were two vacuum lines going back toward the transmission, instead of just the one. Location: Fort Wayne, Indiana, USA. Transmission vacuum line to carb kit. That hose is to gain fresh filtered air for the choke vacuum pull-off. I do have my back and advance hooked up to manifold vacuum under the throttle blades, so Is it OK to have the PCV and the transmission modulator both running to a T off the back of the carb?
It's whay there is a hard line running down there from the factory. I had a 77 ford for several years. Are you running an air cleaner spacer? Carb vacuum line question. What's the purpose of that configuration? I was talking to a friend the other day and he said the hose running from the base to the air horn would cause a vacuum leak and I should plug them both unless I can route the air horn one through the air filter. Yes, all are covered by the manufacturer's standard warranty. They used timing retarding to control emissions back then, especially at idle.
All I know is what I've seen on the warranty and instruction sheets for power brake boosters. Our mild steel lines are galphan coated for added protection. 1957 Ford Thunderbird Pump-Carb Fuel Line Wiper Vacuum Line Steel - SP –. 40+ year old Ford, 4WD, 302 V8, C4 Automatic, Motocraft 2150 carburetor. This type of thing was common back in the day. Please contact use our contact us form! Our Pump to Carburetor Fuel lines connect the fuel pump on the front of the engine to the carburetor.
Re: Where to hook up vac lines on new carb. Our return address is 774 Broad St Wadsworth, Oh 44281. That makes sense as the transmission shifting points have to change based on engine load. How To Order Customs Or Retrofit Gauges From Classic Instruments. I used to just stare at those and thank God they used high quality rubber line. Do indeed to run a line to one of the ports? Joined: Mar/18/2009. 'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. Finish galfan Coated. Shift points were altered a bit and ignition timing retarded for the first few minutes of operation. Anyone know where it should be on this Holley? The ignition retard probably won't work if the engine is too cold. Vacuum Lines Connection - Holley Motor Life. What is the purpose for those two vacuum temperature switches?
IIRC the thinking was that when the timing is retarded, more of the flame front is exposed to the hot cylinder walls and removing the quench area variable during the burn. Thanks for any help. NOTE: Product images may not reflect actual product appeareance. The 1/4" line was shorten and a 3/16" i. d. hose was attached, about 15" and connecting to the front full vacuum port on my carb. Didn't you find oil in dang near EVERY vacuum hose and anything connected to the intake manifold?