Extra vacuum hose on new edelbrock carb? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

imholte · 10-07-2007, 12:35 AM

I replaced my qjet with a edelbrock performer carb today. I got everything together and have a extra vacuum hose that I do not know where it goes. The Qjet has a fitting for it but not the edelbrock. Here is a picture, can anyone tell me what I need to do to fix it, plug it?

Thanks for the help, this place rocks.

Ed

**clay68c10** · 10-07-2007, 12:59 AM

I'd bypass that emission spark solenoid thing and run your vacuum advance to the carb without it.
There's a term for that solenoid, but I don't remember it....

RyanG · 10-07-2007, 04:12 AM

I don't see anything going to the vaccum advance port on the carb. I think that would go there because I am not sure how you vac advance is hooked up right now. I agree with clay68....just go from the vac advance to the carb. Also make sure your tranny kickdown is plugged in. It doesn't have to go to the carb as long as it goes to the intake somewhere.

You could also try pluging it and then go for a test drive and if it runs funny then it needs to be hooked up somewhere. Not sure if you have a booster or not either but make sure all your vac ports and lines are plugged that aren't used.

BTW I made this conversion and I am very happy..love the better gas mileage and electronic choke...

imholte · 10-07-2007, 10:53 AM

Quote:

Originally Posted by clay68c10

I'd bypass that emission spark solenoid thing and run your vacuum advance to the carb without it.
There's a term for that solenoid, but I don't remember it....

So what is the reason for this solenoid thing? I can get rid of it?

Any way to tell if I should plug into the timed vacuum advance or the full vacuum advance? Pretty sure the distributor is stock on the 350? I guess I can try which one works better.

Thanks for you help guys.

**john** · 10-07-2007, 02:42 PM

That solenoid is for TCS. (Transmission controlled spark) You can take it off. It allows vacuum advance only when engine is up to operating temp and in high gear.

**'68OrangeSunshine** · 10-07-2007, 05:57 AM

The usual set-up is PCV 3/8 hose from PCV valve on valve cover to 3/8 PCV valve port on front center of carb. Most people use the ported vacuum advance port on the left [passenger side] front of the carb, connected to the vacuum advance canister by 1/8 hose. If you use this one, you don't need the full-time vacuum port on the right. I plug it. But it's handy for hooking a hand-held vacuum gauge up to for tune ups.

northerngmc · 10-07-2007, 08:35 PM

So how did you choose which performer Edelbrock carb to buy?

And which one did you buy?

I am considering this swap in my 69 GMC, but the truck has a 79 305 in it so I am unsure of which carb to buy???

k2c1959 · 10-08-2007, 05:35 PM

Quote:

Originally Posted by northerngmc

So how did you choose which performer Edelbrock carb to buy?

And which one did you buy?

I am considering this swap in my 69 GMC, but the truck has a 79 305 in it so I am unsure of which carb to buy???

1406 edelbrock performer, electric choke. runs about 280 bucks most places.

longhorn70gmc · 10-09-2007, 01:32 AM

Hello IMHOLTE,

Sorry to highjack your thread. Would you have a picture of where the red wire that comes off your electric choke to the alternator? I have a 600 series elderbrock and want to hook mine up and make sure I do it right. I figured it was worth a question to ask. I printed your first picture coming off the EChoke.Thanks!!!!

RyanG · 10-09-2007, 06:11 AM

I ran my red wire from the unfused ignition outlet in the fuse box. My HEI goes there too.

imholte · 10-09-2007, 09:40 AM

I dont have a picture but the edelbrock install instructions mention the red wire to ignition key activated 12V source. Mine heads towards the firewall, so I am assuming its in the fusebox.

72BLUZ · 10-07-2007, 10:51 PM

Get Rid Of The Vacuum Advance Valve. And Plumb The Distributor Straight To The Carb!!!!

imholte · 10-09-2007, 08:58 PM

Here is the thread on the fuse box picture. It shows the location of the unfused ignition outlet in the box.
http://67-72chevytrucks.com/vboard/s...d.php?t=121515

**70C10Toejam** · 10-09-2007, 10:02 PM

here's mine disconnected, works just fine.

10-07-2007, 12:35 AM	#1
imholte Registered User Join Date: Sep 2007 Location: Oregon Posts: 123	Extra vacuum hose on new edelbrock carb? I replaced my qjet with a edelbrock performer carb today. I got everything together and have a extra vacuum hose that I do not know where it goes. The Qjet has a fitting for it but not the edelbrock. Here is a picture, can anyone tell me what I need to do to fix it, plug it? Thanks for the help, this place rocks. Ed Attached Images __________________ 72' Custom10 4wd 350: Daily Driver Last edited by imholte; 10-07-2007 at 12:36 AM.

10-07-2007, 12:59 AM	#2
clay68c10 Senior Member Join Date: Aug 2004 Location: Centennial, CO Posts: 2,990	Re: Extra vacuum hose on new edelbrock carb? I'd bypass that emission spark solenoid thing and run your vacuum advance to the carb without it. There's a term for that solenoid, but I don't remember it.... __________________ ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ Last edited by clay68c10; 10-07-2007 at 01:00 AM.

10-07-2007, 04:12 AM	#3
RyanG Registered User Join Date: Feb 2006 Location: Gilbert, Az Posts: 180	Re: Extra vacuum hose on new edelbrock carb? I don't see anything going to the vaccum advance port on the carb. I think that would go there because I am not sure how you vac advance is hooked up right now. I agree with clay68....just go from the vac advance to the carb. Also make sure your tranny kickdown is plugged in. It doesn't have to go to the carb as long as it goes to the intake somewhere. You could also try pluging it and then go for a test drive and if it runs funny then it needs to be hooked up somewhere. Not sure if you have a booster or not either but make sure all your vac ports and lines are plugged that aren't used. BTW I made this conversion and I am very happy..love the better gas mileage and electronic choke...

10-07-2007, 02:42 PM	#5
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: Extra vacuum hose on new edelbrock carb? That solenoid is for TCS. (Transmission controlled spark) You can take it off. It allows vacuum advance only when engine is up to operating temp and in high gear. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

10-07-2007, 05:57 AM	#6
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,504	Re: Extra vacuum hose on new edelbrock carb? The usual set-up is PCV 3/8 hose from PCV valve on valve cover to 3/8 PCV valve port on front center of carb. Most people use the ported vacuum advance port on the left [passenger side] front of the carb, connected to the vacuum advance canister by 1/8 hose. If you use this one, you don't need the full-time vacuum port on the right. I plug it. But it's handy for hooking a hand-held vacuum gauge up to for tune ups. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 10-07-2007 at 06:01 AM.

10-07-2007, 08:35 PM	#7
northerngmc Registered User Join Date: Jan 2004 Location: Whitehorse YK Canada Posts: 2,651	Re: Extra vacuum hose on new edelbrock carb? So how did you choose which performer Edelbrock carb to buy? And which one did you buy? I am considering this swap in my 69 GMC, but the truck has a 79 305 in it so I am unsure of which carb to buy??? __________________ Blaine 59 GMC 9314 a.k.a. Whoopee 68 C20 50th Anniversary a.k.a. The Rat http://www.flickr.com/photos/northerngmc/ http://www.members.tripod.com/P-wee/index_032.htm 1.61803 is one H of a lot better than 3.14159, no really it is!

10-09-2007, 01:32 AM	#9
longhorn70gmc Senior Member Join Date: Feb 2001 Location: Ridgecrest. CA, USA Posts: 1,715	Re: Extra vacuum hose on new edelbrock carb? Hello IMHOLTE, Sorry to highjack your thread. Would you have a picture of where the red wire that comes off your electric choke to the alternator? I have a 600 series elderbrock and want to hook mine up and make sure I do it right. I figured it was worth a question to ask. I printed your first picture coming off the EChoke.Thanks!!!! __________________ Billy 1970 GMC Sierra Grande 402/TH400 (Longhorn)14 years and counting rebuild! 1975 (Build) Chevrolet SWB 4X4 350 SB Lifted 6 inches 1970 Ford F250 Ranger 390 BB 2010 Ford Super Duty F250 XLT W/4 inch lift kit and Pro Comp Tires Hub Cap Freak! *I need another truck like I need another hole in the head!* I'M IN THE MARKET...AS IT WERE!

10-09-2007, 06:11 AM	#10
RyanG Registered User Join Date: Feb 2006 Location: Gilbert, Az Posts: 180	Re: Extra vacuum hose on new edelbrock carb? I ran my red wire from the unfused ignition outlet in the fuse box. My HEI goes there too.

10-09-2007, 09:40 AM	#11
imholte Registered User Join Date: Sep 2007 Location: Oregon Posts: 123	Re: Extra vacuum hose on new edelbrock carb? I dont have a picture but the edelbrock install instructions mention the red wire to ignition key activated 12V source. Mine heads towards the firewall, so I am assuming its in the fusebox. __________________ 72' Custom10 4wd 350: Daily Driver

10-07-2007, 10:51 PM	#12
72BLUZ Registered User Join Date: Nov 2006 Location: lafayette, ga. Posts: 832	Re: Extra vacuum hose on new edelbrock carb? Get Rid Of The Vacuum Advance Valve. And Plumb The Distributor Straight To The Carb!!!! __________________ Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same.... Ronald Reagan

10-09-2007, 08:58 PM	#13
imholte Registered User Join Date: Sep 2007 Location: Oregon Posts: 123	Re: Extra vacuum hose on new edelbrock carb? Here is the thread on the fuse box picture. It shows the location of the unfused ignition outlet in the box. http://67-72chevytrucks.com/vboard/s...d.php?t=121515 __________________ 72' Custom10 4wd 350: Daily Driver

10-09-2007, 10:02 PM	#14
70C10Toejam Hellasick Join Date: Jul 2006 Location: Death Moans, IA Posts: 876	Re: Extra vacuum hose on new edelbrock carb? here's mine disconnected, works just fine. Attached Images __________________ I keep two MAGNUMS in my desk. One's a gun, and I keep it loaded. The other's a bottle and it keeps ME loaded. I'm Tracer Bullet. (Calvin and Hobbes) This life was a test. It was only a test. If this had been an actual life, you would have received instructions on where to go and what to do. RED meat is not bad for you...FUZZY BLUE/GREEN MEAT is bad for you!!!!!!!!!!!!! BUILT FORD TOUGH WITH CHEVY STUFF--sticker at Goodguys



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