Quadrajet jet size for a 350 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

85WorkTruckDeluxe · 03-17-2015, 10:27 PM

i have a 800 cfm Q-jet off of a 78 burb 454 that im rebuilding to put on my goodwreanch 350 (260) horse and i broke the jets while i was trying to remove them, they probably would have been to rich for the 350 anyway, my question is what size jets and primary metering rods should i get for this 350 (only performance mod is edelbrock performer 2101 intake) also do ya'll think the secondary metering rods from that 454 will be to much

**MikeB** · 03-18-2015, 09:12 AM

I'd use whatever came with the carb, at least for a starting point. Jet size on a given carb doesn't automatically need to be smaller for a smaller engine. And sometimes it may actually be bigger. For example a hot street 350 may require a larger jet size than a mild 454 using the same carb.

Just thought of this: Get in touch with http://www.cliffshighperformance.com/to see what they recommend.

03-17-2015, 10:27 PM	#1
85WorkTruckDeluxe Registered User Join Date: Feb 2015 Location: Gilbert SC Posts: 16	Quadrajet jet size for a 350 i have a 800 cfm Q-jet off of a 78 burb 454 that im rebuilding to put on my goodwreanch 350 (260) horse and i broke the jets while i was trying to remove them, they probably would have been to rich for the 350 anyway, my question is what size jets and primary metering rods should i get for this 350 (only performance mod is edelbrock performer 2101 intake) also do ya'll think the secondary metering rods from that 454 will be to much

03-18-2015, 09:12 AM	#2
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,599	Re: Quadrajet jet size for a 350 I'd use whatever came with the carb, at least for a starting point. Jet size on a given carb doesn't automatically need to be smaller for a smaller engine. And sometimes it may actually be bigger. For example a hot street 350 may require a larger jet size than a mild 454 using the same carb. Just thought of this: Get in touch with http://www.cliffshighperformance.com/to see what they recommend. __________________ Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! Last edited by MikeB; 03-18-2015 at 09:20 AM.



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