Author Topic: 2 barrel carb question  (Read 1707 times)

Offline txchainsawgogi

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2 barrel carb question
« on: December 14, 2010, 07:15:37 PM »
Could I easily replace a 4 barrel qjet with a 2? I'm looking to really try and get as much mileage as possible and was told that if I wasn't hauling or pulling, that it might help.

Offline txchainsawgogi

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Re: 2 barrel carb question
« Reply #1 on: December 14, 2010, 07:21:10 PM »
Could I easily replace a 4 barrel qjet with a 2? I'm looking to really try and get as much mileage as possible and was told that if I wasn't hauling or pulling, that it might help.

Also, would there be a direct bolt on that wouldn't require rejetting?

Offline zieg85

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Re: 2 barrel carb question
« Reply #2 on: December 14, 2010, 07:50:57 PM »
Mr. Gasket use to make a 4 to 2 bbl. adapter.  I used to use them on my circle track car.  The problem you are going to have is the throttle cable is a different length and if you have a 700R4 that hook up won't be there.  Why don't you just unhook the secondaries?
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline txchainsawgogi

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Re: 2 barrel carb question
« Reply #3 on: December 14, 2010, 08:40:08 PM »
What would that do...and how would I go about doing it?

Offline TexasRed

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Re: 2 barrel carb question
« Reply #4 on: December 14, 2010, 08:48:53 PM »
If you keep your foot out of it and it's properly setup, your qjet will get better mileage than a 2 barrel unless that 2 barrel is meant for a much smaller engine.

Offline zieg85

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Re: 2 barrel carb question
« Reply #5 on: December 14, 2010, 09:11:35 PM »
What would that do...and how would I go about doing it?

By removing the secondary linkage you would essentially would have a 2 bbl.  Assuming you have a Rochester quadrajet there is a linkage on the passenger side that opens the secondaries that you could remove.  It is easy to figure out once you look at it and how it operates.
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/