Any news ?? Bump
Update. It's looking like I'll have time on the dyno on Wednesday afternoon. I spoke with chief tech and he's very interested in doing the testing with me himself (they won't just turn the dyno over to me cart blanc without adult supervision (a constant requirement from Teh Wifey anyway) but I should have a few hours to get a solid baseline and then start testing all the permutations of the designs.
That's part of the problem with the development. There's no fewer than at least seven different theoretical/mathematical models... So I'm having to sorta assume any one of them is "best" and test them all... The spreadsheet has a total of 29 different configurations with total system length, primary header diameter, primary header length, primary cone length, taper angle, secondary length, and secondary taper. For this round I'm going with the stock existing primary header size. From the looks of it, KTM got that not correct. Some models show it's the right length, some show it's too short, and one even came out once calculated with it being WAY to long (I have SERIOUS doubts about that one so I'm not testing it) so, like I said, lots and LOTS of testing...
Of course, I also don't yet have the PCv in hand. That'll be IMPERATIVE to get the most gains. Without it, one could likely expect similar to stock performance, with more noise. It's CERTAINLY going to sound much throatier (is that even a real word?) and visceral of a machine. I had a similar design on a Hawk GT racer many years ago and that exhaust was... Dreamy! LOL The deep booming bop Bop BOP sound felt like... I dunno... An A-10 Warthog... At WFO it was apparently a little terrifying to my fellow racers. They could hear me RIGHT on em and they would frequently and up making mistakes thinking I was closer to them than I actually was, they'd push too hard, and lowside or go wide allowing me to get past. LOL
From the first moment I heard about KTM making the RC390 I knew I had to have one, and I had to make an exhaust for it! :-D
So... Stay tuned! Dyno day is ALMOST finally here!
{hop} {hop} {hop} So excited... :-D