Inline dual fours

[Michael C Henry]

I bought an older replica with inline dual four Holley 1850 carbs, built and adjusted for Reno> 5,000ft elevation, back in 99. I've been messing with them ever since. When I moved the car to western Washington < 500 ft elevation) it was diagnosed as a lean missfire. Then after several major reconfigureations it ended up being right at the maximum for HC PPM at cruise at the emmission testing station but allmost 11 times the maximum for idle. I had two new primary metering blocks made with changeable restricters for the idle circuits. I have all the small brass set screws, micro drills, drilling fixture and such, but haven't touched anything other than the idle mixture screws. I intended on having a friend with modern test equipment and knowledge help diagnose and refine things last summer but overtime, conflicting schedules, and weather killed that. Last summer the few times I had the car out, it depended on the choke to mintain an idle untill it was fully warmeded up. Now that its cold and I can't help and beleive that the idle is way lean now. I intend to wait untill its warmer ( like late spring ) to start redoing anything. I'm very aware of it's potential and even have the programable rev limiter set to 6,000 rpm to protect myself here on the street. Cam and intake are intended for high rpm but I do not beleive the S&H air cleaners would let it get there.
Feel free to jump in anytime.