I cant see any wash at all, all I see is black carbon on my screen......lol, the reason I say it happens over time is you see all that black carbon behind the exposed rindlands and such, this means it ran for some time with the edges burned back. The tempa blows do this over time, this is usually a situation where they come into play, you and your buddies are running hard on some fast trails/lakes, you guys all come to a stop sign shut off the sleds and decide where your all gonna go for luch or whatever, about a 30-40 second stop max...... then you guys all yank the ropes and rip off to your destination, and while you first take off all the heat from the pipes and engine has told the tempablow thats the temp is now 70-80 degress out and its leaned out the fuel flow, but the problem arises because its only 20 out and the motor is wide open again, poof.......lean burn, the exh side of the pistons goes into melt mode, this may only happen for a few seconds till the tempa blow catches up but the damage has already been done, now multiply this scenario over a whole season and you have burned exh edges on your pistons!
A tempa blow may only pick one one or 2 cylinders based on the heat of the actual cylinder, its not picky, which ever cylinder is the hottest gets it first ,with ski's sled it was the middle, its sitting between to other hot cylinders at rest. A viper has alot of cooling problems with the stock mono head and its not even like a srx is. A way to get a viper to cool more evenly is to run a srx base gasket and a set of mega power(larger coolant capacity) or srx heads on it, plus they can be set up with the correct squish angles and clearances for better performance and reliability. This is also how you can jet it correctly to get some kind of mileage, you will never, never, ever get a piped viper to get the mileage of a srx because of its pipe design, it just takes more fuel in the pilot, with the aftermarket pipes, this is where you spend 80 percent of your trail riding time unless your nothing but a lake runner then your on the needle and main. The timing really isnt as big a issue as some make it out to be, timing actually helps a motor down low and mid but suffers on topend, retarded timing makes more hp up top, timing helps a motor to get up to power quicker. it is true a viper holds more timing in mid throttle then a srx does but with proper head set up, jetting, clutching it can be done with no problems. A really good way to have your cake and eat it too, is to build a viper with a the head set up listed above, a 01 srx cdi box, and then you can get some what decent overall mileage, but still cant touch the stock or slightly modded srx, they can do 13-15mpg all day long. Again, your dealing with a 40-42.5 pilot in a srx and stock needle spots, versus 47.5-50 pilots and needles way rich , 4 th groove in a viper. The best I have ever gotten a piped viper to do is 10-11mpg and that depends on the trails its ridden on, and it was clutched perfectly, clutching also goes hand in hand with fuel mileage!! This is the reason why Scott,"betheviper" did the srx pipe coversion he did, to get the fuel mileage back.
