Unbeliveably, on the very first run at todays peak performance day i had another set of engine cases break . Something is fundamentally wrong, but what? Barely any of the parts in this engine are the same as the last one, and it's not like we are pushing the limits of what the GSX is capable of as we certainly arent. The run was with a slow nitrous build and there are no signs of detonation at all.
There is so much work goes into a set of cases and it's a terrible waste when it ends after - or rather, during the very first run.
It's raining at the minute but hopefully if the weather improves the rest of the weekend will be spent watching some good drag racing, which will make up for it anyway!
3 comments:
This is very far fetched... but when looking at your frame and the cases... are you sure they aren't stressed and thereby disformed in an unusual way, because the frame is off by one or the other odd millimeter or because it flexes during acceleration ?
Cheers,
Greg - avid read of your blog for quite a while
Nanno - your comments on the frame are possibly not far off the mark. It's a thought a few people have had including myself.
I've stripped the frame today with a view to making some modifications, i think an engine mounting issue is one of the hot topics too.
As a basic test i may run the next set of cases in my old bike just to see if the problem continues.
Thanks for your comments.
As a first static test, you could just compare the dimensions of the two frames, w.o. an engine in there. They shouldn't differ more than one or two mill. I would throw an especially close eye on the lower engine mounts. Also meassure them up in a triangle (thx to old pythagoras you would actually see a bigger distortion, than just meassuring up two points directly). I hope you get what I mean, basically meassure an X between the lower mounts and post the differences, because this would also show if the points are offset like a rhombus or something (which you could hardly meassure from left to right without a frame-jig)
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