Follow along as we build a 105cc ktm, husky, gagas package with a GET cdi and fmf pipe and silencer, HP porting and carb bore, dyno work. www.hpracedevelopment.com
Myths busted, points proven, and the best part for us, you've been kind enough to share. It's fascinating to see the results of the practical application of hard earned experience. Good stuff!
Instead of using a silencer core with consistent perforations and constant diameter, drill out about 2/3 of the holes to a bit larger diameter, in a random pattern. Then, put large dents in the core with a ball peen hammer. People love straight lines, but power loves some randomness. The power should not be affected, much, but it should be significantly quieter. Back in the 1980’s, a magazine dynoed a 2-stroke bike while adding more and more dents in the pipe to see how badly dented a pipe can be without losing power. To their surprise, adding dents added power. The pipe had to be severely mangled before the power dropped off.
So few question What fuel is this bike running? Could a customer send his cylinder head and carb and purchase this package? Would you have to dyno every bike to dial in the timing With a new cdi?
My business is all mail order cylinders and motors. This customer likes c12. We do not have to dyno every package, but if a client want's it tuned as best we can then the extra expense of doing so can find that last little bit
Hola ..esta muy bien lo que haces y me gusta ..pero vas a enfermar de los pulmones ...yo estuve asi un tiempo ..y al final es muy barato y facil poner extracion de humos con un tubo flexible de aluminio y un extractor de cocina antiguo tipo caracol ...hazlo por favor te lo digo por experiencia, asi no puedes seguir ..no se te ve casi en el video de tantos ensayos y tragando ese humo ...muy buenos videos si señor ;)
Yet again I learn something new watching HP videos thanks man I appreciate it! Is the short silencer just bad for 85s? would u run a short one on a 250 2 stroke or go for mid or long silencer?
@@adamhollins yes. although long or short with same sizes also changes back pressure. my guess is the long silencer top end comments historically come from the fact longer silencers would be a tad more air restrictive than short so more back pressure
Myths busted, points proven, and the best part for us, you've been kind enough to share.
It's fascinating to see the results of the practical application of hard earned experience.
Good stuff!
Definitely looking forward to see the spark plug reading video :)
I wana see these types of videos on a 150r next.
Instead of using a silencer core with consistent perforations and constant diameter, drill out about 2/3 of the holes to a bit larger diameter, in a random pattern. Then, put large dents in the core with a ball peen hammer.
People love straight lines, but power loves some randomness.
The power should not be affected, much, but it should be significantly quieter.
Back in the 1980’s, a magazine dynoed a 2-stroke bike while adding more and more dents in the pipe to see how badly dented a pipe can be without losing power. To their surprise, adding dents added power. The pipe had to be severely mangled before the power dropped off.
kids and people like loud - makes them think its faster
Another TOP video.
Can you get CDI s for trail on a stock husky 2023 85?
Big bore pipe with the silencer?
Man, I need to learn more about reading plugs!...if had looked at that plug, I would have swore the bike was too lean.
So few question What fuel is this bike running? Could a customer send his cylinder head and carb and purchase this package? Would you have to dyno every bike to dial in the timing
With a new cdi?
My business is all mail order cylinders and motors. This customer likes c12. We do not have to dyno every package, but if a client want's it tuned as best we can then the extra expense of doing so can find that last little bit
Nice man got a 105 I want done
In order to get the advantage of the GET CDI you have to dyno each bike? Our 105 cylinder has a little bit of porting.
little bit as in are any port timings different?
So if this bike had tps would programming the CDI be much more complicated? I imagine it would.
It takes much longer to go through part throttle testing
Hola ..esta muy bien lo que haces y me gusta ..pero vas a enfermar de los pulmones ...yo estuve asi un tiempo ..y al final es muy barato y facil poner extracion de humos con un tubo flexible de aluminio y un extractor de cocina antiguo tipo caracol ...hazlo por favor te lo digo por experiencia, asi no puedes seguir ..no se te ve casi en el video de tantos ensayos y tragando ese humo ...muy buenos videos si señor ;)
Yet again I learn something new watching HP videos thanks man I appreciate it! Is the short silencer just bad for 85s? would u run a short one on a 250 2 stroke or go for mid or long silencer?
both silencers were same length
@@HPRaceDevelopment oh right my bad so the difference in back pressure is caused by the diameter and internals of the pipe?
@@adamhollins yes. although long or short with same sizes also changes back pressure. my guess is the long silencer top end comments historically come from the fact longer silencers would be a tad more air restrictive than short so more back pressure