Quadrajet Problem Solving > Quadrajet Parts and Numbers
Quadrajet Jets and Rods Question
rwberinger4x4:
Hey guys,
Not sure which sub-category to post this in but I'll start here:
I've been running a Rochester Quadrajet S/N: 17058222 on an old Chevrolet 283 that finally gave up the ghost. I've got a new, bare-bones 190HP GM crate 350 engine installed in the vehicle - so performance wise, it won't be too much different than the 283 - which was bored 30-over and running a mild RV cam.
The "tuneable" parts on the Carb show as follow:
Jet:73
Rod:41k
Secondary rod:DP
I can't find any information on the stock jets and rods for this Carb (checked Ethan's list, but no luck).
The more important question is - will the jets and Rods that worked great with my 283 work on the new 350? If this is the stock (or close to stock) configuration for this Carb - I'll give it a shot before I mess with anything.
Thanks, in advance, for any help or insight you can provide!
Ethan1:
Stock specs of that carb were .077" Primary Jets, 52K Primary Metering Rods, "K" Secondary Hanger and CH Secondary Metering Rods. Found on GMPartswiki.com.
rwberinger4x4:
Thanks Ethan -
I swear I checked there and couldn't find it. Is there any indication of what engine that was set up for?
From a metering area perspective on the primaries, this means my carb is currently set up to be about 11.5% richer than stock at cruise, but 12.2% leaner at WOT.
The bigger question is - any idea how this will translate from a 283 to a 350? Is it worth even trying to run it on the 350?
Ethan1:
It was used on the G1 350cid, A/T, A/C, Fed. As far as your other questions go. I don't know. Cliff would be best to answer. It wouldn't hurt to buy the correct metering rods/jets and give it a try. Tune it. Do you know the specs on that rv cam? Trans? What's it going to be used for?
rwberinger4x4:
The RV cam was on the 283, which had been rebuilt and bored .030 over (so it was really a 287). Not clear on the exact cam specifications - it was in the truck when I bought it. It had an Edelbrock SP2P intake - small runners for fuel economy, but just fine for what I'm driving.
The 283 is being replaced by the stock, base truck 350. The vehicle is a 1975 Toyota Land Cruiser FJ40 with stock Toyota 4-speed transmission and 4.11 gears. It's not going anywhere fast! Really I'm looking for good off-idle response and as much fuel economy as I can squeeze out of a 4000lb brick. With the 283 I had the secondaries ALMOST locked out entirely.
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