Push hard and live
Join Date: Apr 2007
Location: Carson City, NV
I am using a pair of cams designed by Richard Jemison on my FNM 2300. This engine is quite similar to the original 2000 from which it is derived. Using JR's design, I have kept 100%, or more, of the original low-rpm torque while gaining quite an improvement from about 4,000 through redline near 7,000 RPM. The engine is using 45DCOE carbs, with a matched OKP manifold, but otherwise, the engine is essentially stock configuration.
I would suggest that these cams accomplish both increased power up high, and very strong torque down low. Why give up anything?
The first graph was with stock cams and using 40DCOM carbs. The second graph has the same info as the first, overlaid with the modified engine using the RJR cams and 45DCOE carbs. We limited the revs on the second runs, which means the total horsepower reported is less than what would have been produced at redline. Even so, the engine gained slightly more than 20 hp. This was the first run with this configuration, and additional jetting and spark timing research is going forward now. Note that the torque with the modified cams is slightly HIGHER at low RPMs than the stock cam profile.
Carson City, NV
59 102 Touring (first Alfa $500 running)
65 Sprint GT (2nd Alfa, $500 daily driver)
102 Sprint (never did anything with it, but wish I had)
74 Berlina (first new car - now certainly rusted into oblivion)
61 Giulietta Spider G-Prod Race Car (where is it now?)
84 Spider Veloce (rarely drove it, so sold it)
86 Quadrifoglio (Dull car - no more 115s for me)
1971 Montreal "The Full Monty". Fair winds and following seas
59 102 Touring Roadster - restoration complete, enough Alfa for any rational man. Or irrational, for that matter
Two 1946 Stampe SV4C (c/n 294 "Rocinante" - wife's favorite airplane. RIP), and c/n 235 "La Bon Temps Femme" (gone to a new home, but never forgotten)
Zlin 50LA (+9 -6 gees, titanium spar, 1200 lbs, 260HP rumored to now be in Brazil)
1946 Luscombe 8A
Starduster Too (recently spotted at the Nevada City, CA airport - over 20 years and an entire continent separating it from our stewardship in Binghamton, NY)
1955 Cessna 170B (wife taught me to fly tailwheel in this)
64 Mooney M20E ("Rambo". My faithful steed for over 30 years) Nearly 50 years old, and just returned from a trip to Argentina in him
Newest in the fleet
1967 Piper Super Cub on Wipline amphibious floats (a true "all terrain vehicle")
2010 Triumph Thunderbird
You can snap roll an Alfa only one time...
Last edited by DPeterson3; 03-13-2017 at 05:47 PM.