My Quadrajet experience
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From: oregon
My Quadrajet experience
Owned my '73 cp 454 4spd now for just short of two years. When I bought it the PO had installed an Ederbrock 650cfm square bore carb. Never ran very well so I decided to buy the Holley 4175 spreadbore 650cfm. Performed quite well but I decided that it was not great and I am returning car to near original state. Well enter a $30 Rochester Quadrajet from a '77 truck w/400ci in need of a total rebuild. Bought the parts that were needed including jets and rods to match '73 454 specs. I have to say I was pleasantly surprised to the performance this thing has. Great throttle response and nice torque at all speeds. Carb and parts I may have $150 invested but the best bolt on I've done so far.
Drifting
Joined: Aug 2009
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From: new iberia la
Owned my '73 cp 454 4spd now for just short of two years. When I bought it the PO had installed an Ederbrock 650cfm square bore carb. Never ran very well so I decided to buy the Holley 4175 spreadbore 650cfm. Performed quite well but I decided that it was not great and I am returning car to near original state. Well enter a $30 Rochester Quadrajet from a '77 truck w/400ci in need of a total rebuild. Bought the parts that were needed including jets and rods to match '73 454 specs. I have to say I was pleasantly surprised to the performance this thing has. Great throttle response and nice torque at all speeds. Carb and parts I may have $150 invested but the best bolt on I've done so far.
Last edited by fishslayer143; Jan 26, 2016 at 09:12 AM.
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Did you re-size the main air bleeds as well? I don't know off the top of my head what size rods and jets either carb had, but changing rods and jets alone w/o changing main air bleeds could cause you to be running quite lean, although 73 may have been late enough that they had already went to larger MABs.
Last edited by Shark Racer; Jan 26, 2016 at 11:19 AM.
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From: oregon
Did you re-size the main air bleeds as well? I don't know off the top of my head what size rods and jets either carb had, but changing rods and jets alone w/o changing main air bleeds could cause you to be running quite lean, although 73 may have been late enough that they had already went to larger MABs.
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From: oregon
Team Owner
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From: Western NY
Owned my '73 cp 454 4spd now for just short of two years. When I bought it the PO had installed an Ederbrock 650cfm square bore carb. Never ran very well so I decided to buy the Holley 4175 spreadbore 650cfm. Performed quite well but I decided that it was not great and I am returning car to near original state. Well enter a $30 Rochester Quadrajet from a '77 truck w/400ci in need of a total rebuild. Bought the parts that were needed including jets and rods to match '73 454 specs. I have to say I was pleasantly surprised to the performance this thing has. Great throttle response and nice torque at all speeds. Carb and parts I may have $150 invested but the best bolt on I've done so far.
Just curious, what intake manifold does the engine have? "Square bore" carbs don't interchange with a "spread bore" intake manifold, or vice-versa.....
Melting Slicks
Joined: Oct 2010
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From: "ɹǝpunuʍop", Adelaide, South Australia
anyone know if he's (lars) is back on the forum?
and more importantly, is he accepting carbs for rebuilding?
and more importantly, is he accepting carbs for rebuilding?
Last edited by riverracer au; Jan 29, 2016 at 12:05 AM. Reason: missed lar's name out
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From: oregon
I run the stock manifold. The Edelbrock came with an adapter plate. The Holley 4175 is a spreadbore, Holleys answer to the Quadrajets.
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From: Fairfield, VA
anyone know if he's (lars) is back on the forum?
and more importantly, is he accepting carbs for rebuilding?
and more importantly, is he accepting carbs for rebuilding?
Try this, it's old info though - v8fastcars@msn.com.
Racer
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From: Tennessee
Race Director
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From: Tampa, Florida
If Lars at the Beach is the same one, he's moved to Colorado.
Try this, it's old info though - v8fastcars@msn.com.
Try this, it's old info though - v8fastcars@msn.com.
'Lars' has recently posted in C3 tech.
