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have read a few comments about the rochester quadajet being better on 327,s than say holley carbs but then some nicelooking polished off the shelf holley set ups also avaialble
so for a 327 / fuellie heads and a little bit warm in general with turbo 350 auto in a hk , some thoughts from guys who are experienced with 327,s and there carby / combo choice
am after some good street drivability / cruising
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I ran a Quaddie off a WB on basically the same combo (but in an MQ Patrol with TH400). It was really good. It was a 307 + 0.060 (about 317ci) Only problem was it was a cast iron original HK manifold so it needed a carb spacer to seal the original EGR crossover under the carb, but with an alloy manifold tht problem wouldnt exist.
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If we all had the same (good) taste, who would buy all the Fords? |
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yes all the early manifolds MUST require the big thick cardboard gasket if you dont have a spacer when you run the quaddie.
go for the Quaddie,
or Edelbrock carb if you after street looks, its basically the same..
WANTED:
-2 14 x 9.25 CSA style Centrelines.
-2 x 15 x 8 Dragway centrelines |
Old holdens brought on the spot, quick decision, cash paid. |
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I still have an early Quadrajet sitting on top of a reasonable 327 fuellie headed small block after 23 years. It is in an EH & only recently I replaced the TH350 with a TH700 as it broke. Diff gears are 3.5:1. From my experience with this combo, I reckon that it is a terrific carby for that drivability/performance/economy balance that we all want. I am not sure about comparing them to any after market carby. If you do travel the path of a Quadrajet, either study them well & understand them, or find someone that has a great depth of knowledge/experience with them & pay them. They are a fiddly carby compared to some, but once setup to suit your application, they are quite good. Economy on a trip was around 15mpg. Now with the TH700, around 21mpg due to overdriven fourth gear. Remember, a good looking, polished carby, only looks good when you are stopped with the bonnet up. My view is that practicality comes before beauty. Utility8  Edited by user Wednesday, 9 September 2009 7:06:47 PM(UTC)
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utility8
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My HK 307 has a cast #3866922 inlet manifold on it along with a 600 Holley, question is if I switch over to a HK era quaddy will I need the spacer?
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#3866922 inlet manifold is for a Early-Mid 60s 4GC Carby and is no good for Quadrajet . You need a 3919803 or from a HK 327 or 68 Impala , that way you can run a proper 7028212 Auto Carby and use the original baffle/shim and manifold choke system . People carry on about them , but if all is in good condition they are great . I have been selling all this stuff for years and have many happy people . People run into trouble with that "quaddies are all the same mentality) but if all is matched right you will have trouble free motoring . cheers James www.monaromuscleparts.comEdited by user Saturday, 12 September 2009 5:58:16 AM(UTC)
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Sounds like a new manifold & carby comin up then. Edited by user Thursday, 10 September 2009 5:36:44 PM(UTC)
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so what about if you want to run an aftermarket manifold with the quadrajet ,
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no problem with aftermarket manifolds. a good inlet to run with a stg 3 cam (2500rpm - 5500rpm) is the "Edelbrock Performer RPM - QJET" the next one up from the edelbrock performer, but designed specifically for the Rochester Q-Jet. Its normally a special order at most speed shops. most other Stg 3 inlet manifolds are square bore, which means an adapter to go to spead bore, and a hole cut into the bonnet. WANTED: -2 14 x 9.25 CSA style Centrelines. -2 x 15 x 8 Dragway centrelines Edited by user Friday, 11 September 2009 8:48:32 AM(UTC)
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Old holdens brought on the spot, quick decision, cash paid. |
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