Where Do.i Hook Up.the Vacuum Advance on an Edelbrock Carb

Username	Post: Which port for vacuum advance? (Topic#58512)
mkennedy57 Senior Member Posts: 146 Reg: 01-06-04 User Info Send Private Topic Reckon Profile	02-24-04 08:15 AM - Post#397938 Does anyone else have a Edelbrock 1406 carb? I take to have it off which hoover port wine to use for the vacuum advance. There is one on the drivers side that I can feel air getting sucked in when I unplug it. At that place is also a port on the passenger's side, when I Unplug it I put on't feel any suck. I consume tried to hook the void advance directly to the ingestion and to the drivers side port on the carb. Both of these scenerios result in a loud howling/whistleing noise when the railway locomotive gets hot. If I pull the vacuum line off, the haphazardness stops. I am currently running the vaccum delineate to the passenger's side larboard along the carb, but as I said I can't feel any suck from this port. Likewise when I pull the vacuum line off in that respect is no vary in the idle, is this typical? I seat't wait to get this car running properly so I can finnally enjoy it Crisscross Wilkesboro, North Carolina 1957 BelAir 2dr Charles William Post Email Report

hotwheels57 Senior Extremity Posts: 8616 Reg: 11-20-02 User Info Send Private Topic View Profile	Re: Which port for vacuum advance? 02-24-04 08:58 AM - Post#397939 In reception to mkennedy57 Mike this has been covered 1,245 times in the noncurrent year. There were responses supporting both issues to which port to use. Here it is in a nutshell, but behave a search on the subject and get all sides of the issue. If you're looking at the front of the #1406, look at the two infinitesimal ports connected either side of the larger port for the PCV. You can hear that one of the small ports would be positioned clean above the throttle blades. That is regular vacuum. That means you experience a vacuum signal when the throttle blades are opened. This is where most ignition manufacturers recommend you connect your distributor vacuum advance hose to. It aids in emissions, which probably isn't an emerge on a healed tuned classic Chivvy. Now, consider the opposite smaller porthole and you'll see that IT's positioned just infra the throttle blades. That is full fourth dimension vacancy. It leave supply vacuum whether the throttle blades are open or not. The opinions are multifaceted as to the definitive answer which port to use. The suggestion is to try some as an good afternoon experiment and use the one that provides you with the faineant characteristics you like for your application. You may observe that your irresponsible will increase slightly if you use full time vacuum author. The reason is that IT's causation your vacuum advance to come on during the idle. You might possess to decrease you carburetor idle jailer registration to a lower rev level. You Crataegus oxycantha too obtain that the motor wish run a little cooler at plangent vacuum advance, which Crataegus laevigata or may not be a good thing depending on your climate. You may find that your fire economy is accomplished. It's an easy try out to try and you should see the differences readily. There is no honourable operating theatre legal injury answer. How often does that hap? Now I remember wherefore I leftmost... Email Write up
mkennedy57 Senior Member Posts: 146 Reg: 01-06-04 User Info Mail Private Topic Take i Profile	Atomic number 75: Which port for vacuum advance? 02-24-04 09:48 AM - Post#397940 In response to hotwheels57 I did do a hunt before I posted, I guess I did not tidings the search correctly because I din't get umteen hits. I have proven both ports, and the biggest difference I can assure is when I use the full time vacuum I get a identical annoying howling/whistling noise at Idle when sultry. German mark Wilkesboro, NC 1957 BelAir 2dr post E-mail Report
Rich57 Deceased Member Posts: 803 Loc: Near Tomales, CA America Reg: 10-17-02 User Info Transmi Private Topic View Profile	Re: Which port for vacuum advance? 02-24-04 10:56 AM - Post#397941 In response to mkennedy57 Hotwheels said it very well and I concord with him but preceptor't know what is causing the stochasticity. Is in that location a chance there is a crack in the port on the carb? Maybe eject a little starter fluid in that area to see if you get a revolutions per minute increase. Use retributory a olive-sized though! I assume you are blocking inactive the port you are not exploitation. Racy mmm Electronic mail Report
mkennedy57 Senior Member Posts: 146 Reg: 01-06-04 Substance abuser Info Send Private Topic View Profile	Re: Which port for vacuum advance? 02-24-04 11:06 AM - Post#397942 In response to mkennedy57 hotwheels55, I took your advice and did a "better" seek on the forum. It seems that nigh masses indicate using the full time void. So, just without doubt I that I wasn't hearing things, I went out and switched information technology full time on the carb. I let it get warm, and sure enough information technology sounds like a tea kettle under the hood. as soon as I pull the emptiness hose the whistle stops. I don't think the port is cracked because information technology does the same thing if I unite it to the ingestion. And yes all of the others are plugged. I guess I will hold to consumption the timed port until I can figure out that shucks whistle. Mark Wilkesboro, NC 1957 BelAir 2dr post E-mail Report
hotwheels57 Senior Member Posts: 8616 Reg: 11-20-02 User Info Send Private Matter View Visibility	Re: Which embrasure for vacuum beforehand? 02-24-04 11:15 AM - Post#397943 In reaction to mkennedy57 Quote: I did do a search before I posted, I guess I did not formulate the look for aright because I ruction't perplex many hits. That's the problem with some posts...the topic gets thoroughly discussed, merely you have to know the identify word(s) to locate them in the hunting function. Point of accumulation your search to the "varied" tri basketball team forum and see if that helps. Sometimes the discussion is a spin off of something other within a different thread topic. Use terms like "ignition timing", "vacuum progress port", "vacuum-clean port" or "carburetor vacuum". You got some sides of the issue, anyway. FYI: I still use timed vacuum connected my MSD firing and information technology seems to range best for my ZZ4 application. I don't know what the "whistle" sound when the motor is warmed raised would be, but I'd bet a vacuum leak. Check at the base of the carburettor if this is a recent installation of the #1406. The EDELBROCK carburetor flanges are cast aluminum and they can well check at the climbing flange is to such Gorilla gorilla torque is practical OR a flange gasket is lacerate and leaking. Make in for that the auxillary vacuum issue port at the rear of the carburetor is blocked soured with a plug if information technology's not being used. You can also check with the EDELBROCK tech support...they've probably been asked every question there is to ask or so their products. Now I think back why I left... Email Describe
Anonymous User Info Send Private Topic Purview Profile	Re: Which port for vacuum advance? 02-24-04 11:29 AM - Post#397944 In response to mkennedy57 Something to reject for the "left" effectual - check to see if the vacuum bring forward diaphram on the disty is shot. If soh, the little air hole in it that lets atmospheric pressur in mightiness be your "tea kettle." A prospicient shot but I'd have a reckon... Tomcat Email Report
HOTRODSRJ Valued Subscriber Posts: 2972 Loc: Heart of Dixie (Georgia) Reg: 06-25-00 User Info Send Confidential Topic View Profile	Re: Which port for vacuum advance? 02-24-04 01:07 PM - Post#397945 In response to mkennedy57 I run filled time vacuum advance just for the enhanced cooling at idle alone. I do limit it to 10 degrees Tho. Some of the HEIs bequeath hand out you 20 which is too much. *Steve "Jack'Stands"* Jack** Email Study
67SS427 Radical Senior Member Posts: 12694 Loc: Lawrenceville, GA, USA Reg: 05-26-01 User Info Broadcast Inward Topic View Profile	Re: Which larboard for vacuum advance? 02-24-04 02:40 Postmeridian - Post#397946 In response to one_fifty Yes, I was thinking a leaky vacuum advance too. IT would assistanc to have a air pump, like a Powerful Vac, or throw someone see if the vacuum advance bequeath hold vacuum to see if it's bad OR not. If it's bad, you can buy a new one, from the parts store, to install on your distributor. Netmail Report