GS 1000 ST on the dyno

[John Kat]

Not sure what visual differences you are referring to.

What are the timing figures for the OEM European grind? The GS850GN figures are 28-68/66-26. The 850GT and onwards had their inlet timing advanced by a further 10 degrees.

Sorry for that
It's the numbers on the camshaft sprockets that are important.
The intake is a "451" while the exhaust is the standard "490".
I believe the std GS's all had "490"s
"Flying banana" went into more detail on the subject if I remember correctly?

[Guest]

Gs1000s

My Gs1085s runs with V&H pipe comp baffle, Dyna coils and ignition stock 28mm carbs rejetted for oval K&Ns, heads been flowed and fitted with Gs1100g cams which have a longer durration than stock, the result was 90Bhp 68ftlbs torque,but since it has been dynoed, I have had valves checked and 3 or 4 were rather tight so later this yr will have it dynoed again.but yours is putting out good power......

[salty_monk]

Dyno figures are really only relevant if you back to back them on the same machine. Other than that they are just a general reference point. Looks healthy John

[posplayr]

Dyno figures are really only relevant if you back to back them on the same machine. Other than that they are just a general reference point. Looks healthy John

Related discussion re dyno results

http://www.thegsresources.com/_forum/showthread.php?t=169468&highlight=dyno+horsepower

[John Kat]

My Gs1085s runs with V&H pipe comp baffle, Dyna coils and ignition stock 28mm carbs rejetted for oval K&Ns, heads been flowed and fitted with Gs1100g cams which have a longer durration than stock, the result was 90Bhp 68ftlbs torque,but since it has been dynoed, I have had valves checked and 3 or 4 were rather tight so later this yr will have it dynoed again.but yours is putting out good power......

As SM and Posplayr stated, it's not valid to compare numbers coming from different dynos.
What is interesting, I believe, is to determine at what rpm the engine makes it's maximum torque and HP.
I remember an experience I made a long time ago when I had my Honda CB72 rebored to go from 250 cc to 350 cc.
The torque definitely made a big leap forward but...the power peaked out at much lower revs
I managed to get hold of a GS 1100 head with the D ported exhaust outlets and one day ...I'll use it with a 1085 Wiseko kit and some RS carbs