Modified Pipes. Don’t be scared

[pyroM!ke247]

So you have a pipe made for stock engines? Mod them. Why the hell not?!.
Just installed a Esp ported G320 on my hpi 5b. Didn’t have a Big bore pipe. So I modded an old dominator v2 pipe. Converted it to a side bleed with a larger stinger to flow better for the bigbore.

https://www.largescaleforums.com/threads/rear-dominator-v2-pipe-modification.24265/#post-248549

 

[Z.hb71]

So you have a pipe made for stock engines? Mod them. Why the hell not?!.
Just installed a Esp ported G320 on my hpi 5b. Didn’t have a Big bore pipe. So I modded an old dominator v2 pipe. Converted it to a side bleed with a larger stinger to flow better for the bigbore.

But also keep in mind. When you modify pipes, they change performance, in a good or bad Way. Now your sidebleed mod, I'm sure didn't really make much if any difference. If anything you probably gained a wee bit from a bigger stinger. But if you have no clue what your doing and just start chopping, changing pipe length, header length, ect, without calculations, it will change scavenging and all that good stuff and you can mess up performance. So yeah, you probably know this but I'm just putting it out there for people who read this threadm

 

[pyroM!ke247]

Noted. Then I remember the motocross experience from years ago when I tuned and built my own 2 stroke engines and raced. Kinda why I like these toys. Smells and sounds. Not breaking bones anymore just pocket book.

 

[Z.hb71]

Noted. Then I remember the motocross experience from years ago when I tuned and built my own 2 stroke engines and raced. Kinda why I like these toys. Smells and sounds. Not breaking bones anymore just pocket book.

Yep same. Nothing beats the smell and sound of a 2 stroke ? and the reward you get when it's tuned correctly and HAULING ASS down the field ?

 

[AnubisBC]

When you modify pipes, they change performance, in a good or bad Way.

While this is true, there's no reason not to be adventurous. Just don't go cutting up a high end tuned pipe in your first go!

Here's a prime example: OBR's Dan S. is using a "Brap Can" a modded stock muffler can in his 2WD 5ive B.

 

[DougStar]

That 5b hauls Ass????

 

[AnubisBC]

That 5b hauls Ass???

Agreed! The whole build is very well thought out for a singular purpose. I highlighted the Brap Can, but the whole vid is pretty educational (*spoiler! especially for you new non-choke carb guys at 9:09! *spoiler!). There is a lot of thought regarding the mods on this car, and it shows!

 

[Seandonato73]

In saw land we mod the hell out of the stock cans, you would be surprised how much it effects performance, good or bad. I've tossed a few out because it didnt work out. Just placement of the new outlet can be critical for getting the most out of it. Some of them you take apart and make an expansion chamber of sorts.

 

[pyroM!ke247]

Now your sidebleed mod, I'm sure didn't really make much if any difference. If anything you probably gained a wee bit from a bigger stinger.

I didn’t mod it to a side bleed for performance gains. I modded it to a side bleed because I prefer the way side bleeds sound versus end bleeds. I agree the original stinger is roughly 7/16 id. The stinger I installed was 9/16 id. It should lessen back pressure a tad to help the bigbore breathe better. ?
As far as sound, it sounds so much better than the original dominator v2 sound.

 

[Polar_Bus]

2 stroke exhaust design gets very technically deep , if you really want to do it right and learn they have software to help.
https://buildandclick.com/