dapiper

Got my new fuel rail (thanks pallnet) but the 550 RC peak and hold inj running rich, especially at idle, loading up and coking wide range UEGO. Inovate reads 11:1 at idle and 13:1 at 2500 RPM. Replaced Bosche pintle blue top 470 with the RC disc 550 cc/min. The Bosche dialed in fine, but tired and prone to clogging around town, although ran stoic over most of range when clean. May have been on hairy edge of adjustability with Bosche and just lost idle range, but above idle at 2-3K RPM, can adjust to peak RPM with rich and lean roll off. Optimum RPM still much richer than Bosche inj. Don't think increased capacity that much. Above all static in garage. Will try drive tomorrow with more measurements. Noticed the disc is recessed in the inj nozzle, which may affect low volume atomization. Anyone notice something similar with the switch to disc inj? Running simultaneous double fire ECU with HLM hot wire AFM.

The Bosche EFI pump ($100 aftermkt) will deliver 45 gph at 60 psig, good for 500 HP.

Strange throttle response all of a sudden. Idles fine, pulls great above 3K rpm, does not miss at high power. EFI is simultaneous doublefire with Hot Wire HLM AFM on N42 custom turbo with blue top 036 Bosche inj. Have been incr richen slightly with mediocre results. Surge and bucks, especially when cold off idle thru mid range and under part load/throttle. Timing is 17 init as always. Suspected dirty inj, but idles fine. Had episode previously with some bad fuel. What gives?

Brian Wilmots stroker pulled 185HP @ 5600 RPM with triple webers on 9:1 CR on my DynoJet, mild grind.

Most I've seen is 130F after IC just before TB with 90F amb at road race track driving school running 15 psi. Any measurements probably not accurate due to failure to attain steady state and heat capacity of IC and sensor assy. OBTW max IC inlet was 280F. We usually figure 20F approach with air to air. My IC 160 in2 with 2 1/2" core. Heavier IC is better on street due to heat capacity, but once you approach steady state, area takes over.