Here's a few things to throw out there....
So if you put your external on the belly or cone of the pipe then you are infinitely changing your stinger size throughout the tune of the pipe..... Which in turn changes the tune of the pipe and would mess with your tuning,boost curve and fuel curve... Maybe not so much down a drag race track but what would this act like in the Mtns with continuous riding, extreme temp changes and big changes in Elevation?
I have seen first hand the power and response tight housings and external gates can make and it is impressive.... But on the flipside when you tighten your tolerances with all these variables you also tighten the the tuning window of the sled..... This is probably one reason your looking for releasing additional heat off of the piston due to your set up....Gus I'm not saying you aren't correct and I give credit where it is due but with all my turbo experience and the way we mountain riders abuse these sleds I have found to leave things a little "loose" so to say....
I run a .86 external (28 series) on the 800 and I know Im not quite as responsive as a .63 but I have found how to gain it back in clutching... With the .86 on the 800 I have held the thing WOT for about 2-3 min in the Deep and she stays right in tune.....
Something I always try to remember is when you tighten things up and start squeezing every little ounce of performance out of your sled then you better be able to tune the thing and keep everything in check... Gus and these other guys that have years and years of experience... its no big deal to them but for a guy like me.... I want the thing Dummy proof!!!! As simple and reliable as possible while still giving me a good arm workout for the day!!!
Thanks for all the good info guys.. its fun to get on here and actually learn something....
So if you put your external on the belly or cone of the pipe then you are infinitely changing your stinger size throughout the tune of the pipe..... Which in turn changes the tune of the pipe and would mess with your tuning,boost curve and fuel curve... Maybe not so much down a drag race track but what would this act like in the Mtns with continuous riding, extreme temp changes and big changes in Elevation?
I have seen first hand the power and response tight housings and external gates can make and it is impressive.... But on the flipside when you tighten your tolerances with all these variables you also tighten the the tuning window of the sled..... This is probably one reason your looking for releasing additional heat off of the piston due to your set up....Gus I'm not saying you aren't correct and I give credit where it is due but with all my turbo experience and the way we mountain riders abuse these sleds I have found to leave things a little "loose" so to say....
I run a .86 external (28 series) on the 800 and I know Im not quite as responsive as a .63 but I have found how to gain it back in clutching... With the .86 on the 800 I have held the thing WOT for about 2-3 min in the Deep and she stays right in tune.....
Something I always try to remember is when you tighten things up and start squeezing every little ounce of performance out of your sled then you better be able to tune the thing and keep everything in check... Gus and these other guys that have years and years of experience... its no big deal to them but for a guy like me.... I want the thing Dummy proof!!!! As simple and reliable as possible while still giving me a good arm workout for the day!!!
Thanks for all the good info guys.. its fun to get on here and actually learn something....