QuadraJet - Which secondary metering rod to use?
I'm considering changing the secondary metering rods on my rebuilt '72 Chevy #7042210 QuadraJet on my 400ci to see if it improves my ETs. I haven't taken the carb apart yet to measure the thickness of the current rod tips, but I see Summit offers the following secondary metering rods:
EDL-1951: 0.0410" Letter code CE for identification
EDL-1954: 0.0667" Letter code CL for identification
JET-201010: No size given. Fits stamp DA
Not sure what the letter codes stand for? Any ideas?
Am I correct in assuming that the larger the diameter rod, the less fuel is delivered? So, if I find that I have a larger diameter rod installed, I should go down in size (like the rod that is 0.0410?) for more fuel when the secondaries are at WOT?
Thanks!
Jim.
__________________
* '69 Custom S - 2dr Hardtop Coupe - Rust-free Oregon survivor with all original panels and original trunk floor
* Engine alive and kickin' March 2nd, '06 
* RA-IV 'spec' 400 (.060-over = 410ci), balanced, Comp Cams #9794041, #16 heads (72cc converted to large valve) with 1.65 Harland Sharp Rollers
* QuadraJet #7042210, HEI, Hurst V-Gate, FlowTech Headers, X-Pipe with dumps, Flowmasters, TH-350, 3.90 Posi
* Best ET: 14.06 - Bandimere Speedway, CO. @ 5,800+'
Last edited by tremo; 05-31-2022 at 08:19 PM.
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