1978 Toyota SR5- One for Dad

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legopnuematic

Licensed Junk Dealer
Supporting Member
Joined
Oct 27, 2016
Posts
5,135
Reaction score
19,120
Location
MO
First Name
Spencer
Truck Year
1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
Truck Model
Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
Engine Size
225/6, 350 c.i., 350 c.i., 5.9l Cummins
And all 3 came right out. Got some new screws at the farm store.
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I believe there is over 80pcs to this carb
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New float, made in Japan.
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legopnuematic

Licensed Junk Dealer
Supporting Member
Joined
Oct 27, 2016
Posts
5,135
Reaction score
19,120
Location
MO
First Name
Spencer
Truck Year
1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
Truck Model
Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
Engine Size
225/6, 350 c.i., 350 c.i., 5.9l Cummins
The rest of the work was just following the manual, cleaning parts, replacing parts, adjusting to the baseline specs in the manual.

One thing I wanted to do was delete the original hot water choke, yes hot water. It works fine, but the issue is I have not been able to find a source for new molded hoses (straight hose might work but the old ones are rather shapely). Not exactly an ideal thing to have rupture and not be able to source a replacement.

I had an electric choke from a Quadrajet so I decided to see what it would take to adapt it.
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A simple adapter/spacer is what is needed.
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Took some measurements and drew it up in solid works and whipped one up, from 6061 BILLET aluminum. This i suspect if the one and only Qjet to Aisan carb choke adapter.
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Took a time lapse of it opening. I think it will work.
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Got it back on the truck last night, the phenolic spacer/insulator had the gaskets so stuck to it that after too long with a razor blade scraper, I took it to the belt and disc sanders to finish it off. Need to source some plugs to plug and remove the hot water choke.
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After some on truck adjustments its running better than it has, drives good, less throttle input needed, not pops, dieseling, or backfire when shutdown. So that is good. I would like to do a valve adjustment, recheck timing, and then readjust the carb. A full tune up. A definite improvement. I do need to round up some supplies to wire the choke up, for not I had it adjusted to hold the choke open all the time.
 

89Suburban

Full Access Member
Joined
Dec 7, 2010
Posts
25,525
Reaction score
9,183
Location
Southeast PA
First Name
Paw Paw
Truck Year
2007
Truck Model
Chevrolet Tahoe LT
Engine Size
5.3, 4WD
Love the 4 post lift and how you utilize the center trolleys and jacks and jack stands good stuff
 
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