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download SuperFlow free software (click link), move these tests to disc, do your own graphs, see all other data from each test

dyno test with timing backed off, compare dyno numbers with hood closed and air filter membrane attached

check this out with 9 degrees added ignition timing (!!) and exhaust valves cranked WFO, EFI owners read’em & weep

test B is with stock F7 EFI ECU, test C is with F6 ECU–note huge difference in EG valve opening and fuel flow lb/hr

we found the missing airflow CFM, still looking for a few missing HP…

jetting, airbox mods, reeds, reeds, carb boot mods, timing tweeks, compression increase, aftermarket pipe…

modify ignition timing, fuel flow, carb venting, compare early vs late muffler

assess performace with stock single pipe and muffler, also with D&D twin pipes and can, all on pump gas

carb tuning, airbox mods, ignition timing, reed testing (read this before you buy reeds for your ProX800), SLP pipe and can…

stock bore 700, leaned out fuel flow, advanced timing, Arctic Cat race boxes (1000′ and 500′)

EFI water temp, fuel mods, timing changes, all on 92 octane pump gas

dyno airflow CFM is directly proportional to HP increase–fuel and timing adjustment are required

direct comparison of 2003 vs 2004 ECU programming, dropping the BSFC to .70 on top end w/o leaning midrange

including lost F6 EFI dyno test, all dyno data, comments, RX1 breakin session

upcoming tests: Cat F7 800 big bore, SkiDoo and Pol 800 twins, New DTR High Altitude dyno, AMSNOW certification testing

dyno data from test number 006, aftermarket Ypipe with stock tuned pipe, which I forgot to include in the previous article.

jetting, airbox mods, Ypipe mod on Carl McQuillen’s semi-stocker

we discovered the cause of the missing RX1 HP!! ??

it happened again on a turbo RX1 while on the dyno– lost airflow and HP, but we figured it out and got it back!!

the 700’s and Big Bores, dyno tested and piloted at the Shootout by DynoTech performance maven Sean Ray.