x1glider wrote:
I wouldn't call it ram air on the 1125 as the intake isn't really in a high pressure area. The fact that air has to travel through the frame limits any meaningful improvements to be made. Forcing air into an airbox that isn't changing in volume as rpms change doesn't really work until enough pressure builds to surpass what it's able to do normally. It'd be better to make it scavenge more efficiently with some headwork and new cams with timing to improve volumetric efficiency.
If you want to see ram air on a Buell, look at the XBRR race bikes with its front fairing scoop in the highest pressure area and double intake tracts going directly into the airbox. That would be the next thing to do but only matters if the top end is designed to make use of it. On a stock engine, you'd be wasting your time.
Bone stock, the 1125 is pretty good for a road bike. Discomfort from engine heat is one of its shortcomings as is heated fuel in the frame. Plenty of people have added thermal tapes to the inside of the frame to help. Doesn't solve getting the heat out of there though. Apparently that was of secondary concern to Erik.
Hi X1glider,
Thanks for your comments.
Yeah, I'm definitely not going into the engine. These engines are tuned enough as they are for my liking, I'm far more concerned about manageablity and being able to release & use what it already produces.
I also think the ram air thing is a bit sketchy on the 1125r although I have read that it gives 6BHP at 8 to 10 thousand revs. I personally think that the 60mm throttle bodies are capable of sucking whatever air they need from normal atmospherics just through the gap round the underside of the outer box cover. If not I can always try letting more in by altering the cover, probably more by lifting the front slightly (which will probably do a better job of any ramming that needs to be done) rather than cutting holes in it.
Looks like I'm just going to remove the bottom ram air funnel & let some of that air run over the Cylinder heads & frame to aid with cooling for the time being. Once the air box is open it doesn't do anything being where it is anyway.
To be totally honest the Remus Exhaust has had the biggest impact on engine cooling so far as it transfers the heat to the rear underside of the engine & what I'm hoping is that the air flowing through the central area of the frame will exit onto the exhaust box & draw heat off that also.
I'll keep posting how it's going although looking, thinking & figuring how things may work is more what's happening at the moment & probably for the next few days.
Thanks again for your comments, much appreciated. If anyone can see any (Black Holes) in my thinking feel free to let me know.
All the best Folks. Paul.