alien_hitchhiker
05-21-2005, 12:39 PM
Back in Februaury I installed GS intake tubes on my '00 R1100RT and posted my glowing impressions - roarty, growling torque meister, blah, blah, blah. :D
Being the sort who can never leave well enough alone I reinstalled the stock tubes yesterday (4,300 miles later). You know what? I think I like the stockers better (for now anyway).
What I found is that the GS tubes:
~ have a roarty intake honk
~ do seem to improve torgue in the 2500-3800 range (this is all seat of the pants, mind you)
~ definitely - on my bike with a moderately tuned Techlusion R259 & Denso IK22 plugs - create a flat spot at about 3800 - 4000 rpm, from which it emerges during acceleration with a nice power hit.
Now you ask, "So, what's the big deal?"
~ the intake honk got old - in the end I prefer quieter
~ the power curve is more linear with the stock tubes - makes for smoother roll-ons
~ and finally - this one is more subtle - the engine seems to rev more willingly, & cleaner, with the stockers. I find myself spending more time in the 5000rpm neighborhood instead of the 3500 one. Strictly a matter of personal preference, but at 5000 there is definitely more immediately available power should you find a need to hustle a bit.
I know that the flat spot with the GS tubes is counter to the available dyno results. My theory is that the Techlusion corrected the torgue dip & when then combined with the more restrictive GS tubes actually results in an overly rich condition during hard acceleration.
Comments? Thoughts? :doh 's?
Steve
Being the sort who can never leave well enough alone I reinstalled the stock tubes yesterday (4,300 miles later). You know what? I think I like the stockers better (for now anyway).
What I found is that the GS tubes:
~ have a roarty intake honk
~ do seem to improve torgue in the 2500-3800 range (this is all seat of the pants, mind you)
~ definitely - on my bike with a moderately tuned Techlusion R259 & Denso IK22 plugs - create a flat spot at about 3800 - 4000 rpm, from which it emerges during acceleration with a nice power hit.
Now you ask, "So, what's the big deal?"
~ the intake honk got old - in the end I prefer quieter
~ the power curve is more linear with the stock tubes - makes for smoother roll-ons
~ and finally - this one is more subtle - the engine seems to rev more willingly, & cleaner, with the stockers. I find myself spending more time in the 5000rpm neighborhood instead of the 3500 one. Strictly a matter of personal preference, but at 5000 there is definitely more immediately available power should you find a need to hustle a bit.
I know that the flat spot with the GS tubes is counter to the available dyno results. My theory is that the Techlusion corrected the torgue dip & when then combined with the more restrictive GS tubes actually results in an overly rich condition during hard acceleration.
Comments? Thoughts? :doh 's?
Steve