CMB91RS

[Anders_Martinelle]

Does anyone have the values for the CMB91RS engine to put in EAP??

Also STD timings?

Anders

 

[Bart Drieghe]

Hi Anders ,

Standard timings

Exhaust duration 183

Transferport duration 122

Boost port duration 128

induction open 147

induction closing 56

I think this answers your question .

Bart

 

[DaveMarles]

Anders,

bore 27.5 mm

stroke 25.2 mm

conrod length 45.5 mm

top of cylinder to piston at TDC 2.3

Latest motors have changed timings

Now Ex 15.87 mm

Transfers 21.7 mm

boost 21.38 mm

Head volume I didn't measure, I use twin cone plug head from CMB 90 machined to fit 91RS.

induction opens 26mm BTDC

closes 9.1mm ATDC

Hope this helps,

Dave

 

[RMA]

Does anyone have the values for the CMB45RS engine??

Rune

 

[Anders_Martinelle]

Thank`s Dave!!