 Need help with Workshop Manual
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Joined: Nov 2005
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OP
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Joined: Nov 2005
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G'day members,
Have a Triumph Workshop Manual for Bonney/Thrux/America/SM, P/n T3859909-1, Issue 4, 10.2004
Checked the cam timing specs for the 790cc America/SM in Chapter1, Page 13 - General Information, states:
IO 19* btdc, IC 43* abdc, duration 228*, this duration is wrong, should be 242*
EO 37* bbdc, EC 11* atdc, duration 216*, this duration is wrong, should be 228*
Does anyone have the earlier versions of the Workshop Manuals, that shows this cam timing spec??
Is there a later version of this Workshop Manual, with these specs??
Anyone with the Haynes Manual, please post the specs for the 790cc America/SM
Thanks..............agro
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Re: Need help with Workshop Manual
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Joined: Jan 2005
Posts: 1,179
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,179 |
Hello Agro,
I have the same Triumph service manual as you. Why do you say the durations are wrong? The durations you say "should be" (242/228) are called out for the 360deg Bonneville/T100 790's, not our bikes.
I also own the Haynes manual. I must be blind as I can not see this information called out anywhere in that manual.
Anyone else?
Regards,
Tom
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Re: Need help with Workshop Manual
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Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
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Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
My Triumph shop manual gives 790cc cam durations of 228/216 for the America/Speedmaster and 242/236 for the Bonneville/T-100...
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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Re: Need help with Workshop Manual
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Joined: Nov 2005
Posts: 57
Member
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OP
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Joined: Nov 2005
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Quote:
Hello Agro,
I have the same Triumph service manual as you. Why do you say the durations are wrong? The durations you say "should be" (242/228) are called out for the 360deg Bonneville/T100 790's, not our bikes.
I also own the Haynes manual. I must be blind as I can not see this information called out anywhere in that manual.
Anyone else?
Regards,
Tom
Under the 790 America/SM column states Intake duration 228 degrees and Ex duration 216 degree, but by the valve timing events quoted the duration should be 242* & 228*
What i wanna know is which is correct; the valve timing events quoted or the durations quoted??
If the durations quoted are correct, then the valve timing events are wrong.
Cheers..............agro
Last edited by Whale_Oil_Beef_Hooked; 10/02/2007 9:11 AM.
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Re: Need help with Workshop Manual
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Joined: Nov 2005
Posts: 57
Member
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OP
Member
Joined: Nov 2005
Posts: 57 |
Quote:
My Triumph shop manual gives 790cc cam durations of 228/216 for the America/Speedmaster and 242/236 for the Bonneville/T-100...
Yep, mine does as well..............
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Re: Need help with Workshop Manual
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Joined: Nov 2005
Posts: 57
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OP
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Grey beard posted these cam timing specs a while ago........
The 790 cams are:
inlet, 19 before, 43 after
Exhaust, 31 beore, 5 after.
RAT forum member posted these specs...........
Specs for Bonneville America 790cc from Issue 2 - 03.2002
Intake
Open - 19deg btdc
Close - 43deg abdc
Duration - 242deg
Exhaust
Open - 46deg bbdc
Close - 20deg atdc
Duration - 246deg
(All are measured at 1.0mm lift, per Manual)
The math works out ok re: Triumph's published duration, using this version of the manual.
Cheers...................agro
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