[dr_gallup]

________2002 Daytona ________ 2002 Speed Triple _____________ 1050 Speed Triple
IN: open - 25* BTDC --------------------- 26* BTDC --------------------------- 11.25* BTDC
-- -Close - 53 ABDC ---------------------- 38* ABDC --------------------------- 41.25* ABDC
Duration - 258* ---------------------------- 244* --------------------------------- 232.5*

EX: open - 39.5* BBDC ------------------ 43* BBDC --------------------------- 34* BBDC
---- close - 29* ATDC --------------------- 5* ATDC ---------------------------- 4* ATDC
Duration - 249* ---------------------------- 228* ---------------------------------- 228*

The 1050 engines look to use the same exhaust cams as the 2002+ Triples, but the intake cam is even more mild - even with greater stroke. This leads me to believe that the 1050 head flows better than previous heads.

Devi,

Is there a misprint in the 1050 exhaust opening? Shouldn't the opening be 44 degrees BBDC given that you said the duration is the same as the 2002 S3? How about lift numbers? I think the intake cam timing has a lot to do with the fantastic low end torque these motors have. Of course the stroker crank helps too. Why do you say the cams are a compromise based on cost? It doesn't cost any more to grind a long duration cam than a short duration cam. The trick to getting good power and wide powerband is getting the valves open and closed quickly without pounding out the seats or floating the valves at high RPM.

 

[dr_gallup]

2002 exhaust 43+180+5=228
2005 exhaust 34+180+4=218
218 does not equal 228

Plus, if the lift is different, it's a different cam.

Other than the R&D cost, there is only the changeover time cost between one part & another. They probably all come from the same raw material so economies of scale are still achieved.