heres pics of the triple exhaust port job i finished up today on the stock cylinder that will go on my trail blasty, its also adjusted for a +3 crank
heres pics of the triple exhaust port job i finished up today on the stock cylinder that will go on my trail blasty, its also adjusted for a +3 crank
I have a concern here...
The size of the triple exhaust ports and their proximity to the primary transfer ports. The porting work looks great, but in the process of "squaring" those triple exhaust ports, you got a little close to the transfers. Recommended distance between the low pressure exhaust port and high pressure transfer is 3.5mm to prevent charge short-circuiting. While on an heavily ported cylinder it's not always possible to keep the ports 3.5mm apart, your primary transfers and triple exhaust ports look like they are less than 1mm apart. What's worse, the primary transfers are the ones with the roofs angled upwards so the charge is already curled up towards that port.
Charge short-circuiting isn't the end of the world and won't cause any immediate damage or anything, you're not seeing the full benefit of the blow-down port area if the transfer is pushing half its charge out into the head pipe without burning it.
It won't run like crap and I didn't mean to make it sound like that.
My concern is that you won't realize the FULL value of your work because some of the primary transfer charge is going straight out the exhaust pipe.
There's not much to be done about it however, if the size of the triples was dictated by a "slip" and the work needed to clean it up.
The work looks top notch!
ports look great freek! great job dude I:I
cant wait to hear how she runs