Carb Questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cplkillian · 02-13-2010, 10:45 PM

I have a 71 w/ a 350 quadrajet and i am going to be changing the manifold and carb to edlebrock, and the carb is going to be an electric choke. are there any problems in making it an electric choke, my carb now is not a manual, but i saw on the new carb that it has 2 wires. any help will be greatly appreciated.

Mike

Sinister · 02-13-2010, 11:09 PM

No problems with an electric choke, just hook it up to 12 volts and go. The choke on Edelbrock carbs ground to the carb.

Old Yeller 1970 · 02-13-2010, 11:13 PM

One wire needs to run to chassis ground (ie any part of the carb or intake should ground) and the other to a switched hot wire. There should be a spare terminal on your under dash fuse panel that is hot when the ignition is switched on. I would wire an in line fuse and run it to your carb. Another option would be if you've already changed from a points distributor to a HEI, the HEI will have a switched hot wire run to it. You could splice into that wire.

cplkillian · 02-14-2010, 10:56 AM

thank you both, great info.

Wrenchbender Ret · 02-14-2010, 11:22 AM

The only thing you have to watch for with that system is if you leave the key on without the engine running the choke will go off. The factory system uses an oil pressure switch. It,s no biggy but something to keep in mind.

cplkillian · 02-14-2010, 04:53 PM

thanks wrench.

i also am wondering, im wanting to replace the distrbutor while its all blown apart, and was curious what hei distributor i could get. mainly what years. i was looking at the mid 80's ones but want to make sure its something that will work

Wrenchbender Ret · 02-14-2010, 05:06 PM

A v-8 HEI from 75 up to early-mid 80's will work. Some in the 80's have computer controls. Make sure it has mechanical & vacuum advance. I always get a used one & fix it up, but a lot of guys are buying the new ones.

Sinister · 02-14-2010, 05:07 PM

I would get a Skip White HEI off of E-bay. Plenty of guys on the Board running them.

cplkillian · 02-14-2010, 07:16 PM

sinister, thanks i looked him up, and seems like a killer deal.

Sinister · 02-14-2010, 07:44 PM

Yeah, it's a real good deal. Good luck with your truck.

aintmisbehavinn · 02-14-2010, 10:36 PM

Someone put a Holly manual doublepumper on mine, gas miles = 12 if I'm lucky.

GASoline71 · 02-14-2010, 10:39 PM

Most cases a double pumper on a small block street rig is overkill...

Gary

aintmisbehavinn · 02-14-2010, 10:57 PM

Quote:

Originally Posted by GASoline71

Most cases a double pumper on a small block street rig is overkill...

Gary

I found out the hard way when it turned a 13.28 quarter mile. The only good thing I see is I don't have to choke it to crank it....I also noticed it has TRW, MSD, Lunati, Weiand, Flowmasters, B&M and other goodies, probably overkill as well but it sure feels good when it stalls to 2400 then leaves rubber half way down the track and everyone else is playing catch up with the LWB truck.

cplkillian · 02-15-2010, 01:52 AM

i was comparing the stock intake manifold and the new edelbrock one and noticed that the new one has 3 coolant ports that are threaded and the stock one has one. can i plug those, or is there anything im missing?

Old Yeller 1970 · 02-15-2010, 09:58 AM

You're not missing anything. Plug the ones you don't need.

68Stepbed · 02-15-2010, 10:40 AM

Quote:

Originally Posted by aintmisbehavinn

Someone put a Holly manual doublepumper on mine, gas miles = 12 if I'm lucky.

12mpg out of a double pumper? Dang, That's good!!!

cdowns · 02-15-2010, 10:46 AM

best thing to do is read instructions included with your new stuff b4 installing

fdbdw · 02-15-2010, 11:21 AM

make sure you use locktight on the intake bolt threads or you will have oil and antifreeze coming out of them, I use the blue and it works well

cplkillian · 02-15-2010, 01:24 PM

ok i have everything ready to be put on, pulled everything off and I'm about to start the install after cleanup, as far as the fuel line goes, what am I suppose to do? the quad goes on the front and the edelbrock does not. i went and looked to see if there were different fuel lines that i might should have bought and didnt find anything, any suggestions.

Sinister · 02-15-2010, 03:08 PM

Not necessary, but I'm running one of these: http://www.summitracing.com/parts/SUM-G1532/
I used a tubing cutter and cut the stock metal line and ran a short piece of rubber fuel line to the chrome piece. You could basically do the same with out the chrome line and run straight to the carb.

cdowns · 02-15-2010, 03:41 PM

buy a length of metal tubing at an autoparts store and take the time and effort to bend it for a nice safe good looking fuel line//dont use lengths of rubber hose they burn things up in the long run

02-13-2010, 10:45 PM	#1
cplkillian Registered User Join Date: Jan 2010 Location: Bremerton, WA Posts: 29	Carb Questions I have a 71 w/ a 350 quadrajet and i am going to be changing the manifold and carb to edlebrock, and the carb is going to be an electric choke. are there any problems in making it an electric choke, my carb now is not a manual, but i saw on the new carb that it has 2 wires. any help will be greatly appreciated. Mike

02-13-2010, 11:09 PM	#2
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	Re: Carb Questions No problems with an electric choke, just hook it up to 12 volts and go. The choke on Edelbrock carbs ground to the carb. __________________ Beat it to fit, Paint it to match... Last edited by Sinister; 02-13-2010 at 11:10 PM.

02-13-2010, 11:13 PM	#3
Old Yeller 1970 DON'T TREAD ON ME Join Date: May 2005 Location: Crosby County, TX Posts: 989	Re: Carb Questions One wire needs to run to chassis ground (ie any part of the carb or intake should ground) and the other to a switched hot wire. There should be a spare terminal on your under dash fuse panel that is hot when the ignition is switched on. I would wire an in line fuse and run it to your carb. Another option would be if you've already changed from a points distributor to a HEI, the HEI will have a switched hot wire run to it. You could splice into that wire. __________________ Old Yeller

02-14-2010, 10:56 AM	#4
cplkillian Registered User Join Date: Jan 2010 Location: Bremerton, WA Posts: 29	Re: Carb Questions thank you both, great info.

02-14-2010, 11:22 AM	#5
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,229	Re: Carb Questions The only thing you have to watch for with that system is if you leave the key on without the engine running the choke will go off. The factory system uses an oil pressure switch. It,s no biggy but something to keep in mind.

02-14-2010, 04:53 PM	#6
cplkillian Registered User Join Date: Jan 2010 Location: Bremerton, WA Posts: 29	Re: Carb Questions thanks wrench. i also am wondering, im wanting to replace the distrbutor while its all blown apart, and was curious what hei distributor i could get. mainly what years. i was looking at the mid 80's ones but want to make sure its something that will work

02-14-2010, 05:06 PM	#7
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,229	Re: Carb Questions A v-8 HEI from 75 up to early-mid 80's will work. Some in the 80's have computer controls. Make sure it has mechanical & vacuum advance. I always get a used one & fix it up, but a lot of guys are buying the new ones.

02-14-2010, 05:07 PM	#8
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	Re: Carb Questions I would get a Skip White HEI off of E-bay. Plenty of guys on the Board running them. __________________ Beat it to fit, Paint it to match...

02-14-2010, 07:16 PM	#9
cplkillian Registered User Join Date: Jan 2010 Location: Bremerton, WA Posts: 29	Re: Carb Questions sinister, thanks i looked him up, and seems like a killer deal.

02-14-2010, 07:44 PM	#10
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	Re: Carb Questions Yeah, it's a real good deal. Good luck with your truck. __________________ Beat it to fit, Paint it to match...

02-14-2010, 10:36 PM	#11
aintmisbehavinn Registered User Join Date: Dec 2008 Location: Lawrenceville GA Posts: 64	Re: Carb Questions Someone put a Holly manual doublepumper on mine, gas miles = 12 if I'm lucky.

02-15-2010, 01:52 AM	#14
cplkillian Registered User Join Date: Jan 2010 Location: Bremerton, WA Posts: 29	Re: Carb Questions i was comparing the stock intake manifold and the new edelbrock one and noticed that the new one has 3 coolant ports that are threaded and the stock one has one. can i plug those, or is there anything im missing?

02-15-2010, 09:58 AM	#15
Old Yeller 1970 DON'T TREAD ON ME Join Date: May 2005 Location: Crosby County, TX Posts: 989	Re: Carb Questions You're not missing anything. Plug the ones you don't need. __________________ Old Yeller

02-15-2010, 10:46 AM	#17
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Carb Questions best thing to do is read instructions included with your new stuff b4 installing __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

02-15-2010, 11:21 AM	#18
fdbdw Registered User Join Date: Jan 2009 Location: colorado springs Posts: 479	Re: Carb Questions make sure you use locktight on the intake bolt threads or you will have oil and antifreeze coming out of them, I use the blue and it works well



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02-15-2010, 01:24 PM	#19
cplkillian Registered User Join Date: Jan 2010 Location: Bremerton, WA Posts: 29	Re: Carb Questions ok i have everything ready to be put on, pulled everything off and I'm about to start the install after cleanup, as far as the fuel line goes, what am I suppose to do? the quad goes on the front and the edelbrock does not. i went and looked to see if there were different fuel lines that i might should have bought and didnt find anything, any suggestions.

02-15-2010, 03:08 PM	#20
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	Re: Carb Questions Not necessary, but I'm running one of these: http://www.summitracing.com/parts/SUM-G1532/ I used a tubing cutter and cut the stock metal line and ran a short piece of rubber fuel line to the chrome piece. You could basically do the same with out the chrome line and run straight to the carb. __________________ Beat it to fit, Paint it to match... Last edited by Sinister; 02-15-2010 at 03:14 PM.

02-15-2010, 03:41 PM	#21
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Carb Questions buy a length of metal tubing at an autoparts store and take the time and effort to bend it for a nice safe good looking fuel line//dont use lengths of rubber hose they burn things up in the long run __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

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