Every where i go every one says rear exit exhaust with dual stingers sucks. It does not matter what it is on it just sucks. Now this does not seem right. There has to be a combination of engine and rear exhaust that works. I have a TRX 3.3 with the integy quad tip rear exhaust and i like them. I can't say i love them on that engine but i like them. Now on something small like a TRX 3.3 they might not do well but what about running them with something like a Picco .26 MAX JLR RED-DOT or a O.S. FS-26S-C Version II. Or maybe even something larger. So if any one has any ideas as to how to utilize the design of rear exhaust systems please post.
-
Welcome to RCTalk! 🚀
Join the #1 RC community where hobbyists connect, share, and get expert advice on RC cars, trucks, boats, drones, and more!
- ✓ Friendly & passionate RC enthusiasts
- ✓ RC tips & troubleshooting
- ✓ Buy, sell & trade RC gear
- ✓ Share builds & upgrades
Exhaust set up
- Thread starter ReaperGN
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, and others.
links, including eBay, Amazon, and others.
I've seen a few people say they have one that works, I know the single chamber RD Logics dual/dual stinger does not work on OS .30 in a Savage.
- Thread starter
- #3
i found this link http://www.rcuniverse.com/forum/m_35.../anchor/tm.htm it is a discussion on making a custom pipe for a nitro motor. what i understand from the discussion is that a nitro motor does not need back pressure to run but to run consistent your fuel tank does. the leanness every one talks about is from the flow of fuel as your rpm's change. so to keep that pressure constant what if you close the nipple on the exhaust canister and make a new one in the header pipe.
- Thread starter
- #5
well i ran don the the hobby shop today and put a fitting in my header pipe. only thing left to do is clean out the filings and put some jb weld on to seal the fitting. hopefully this will create enough pressure in the tank to get rid of the leanness that rear exhaust systems cause.
Cupooterluvr
Hardcore RCTalk User
If you really like the pipe, you could plug 2 of the holes (If I understand it right there are 4 holes?) and that should give sufficient backpressure.
- Thread starter
- #7
i would but that would be a waste of the pipe. where i need the pressure is to the tank. if putting the fitting in the header doesn't do enough i will make so sort of baffle to go in the rubber connector. about all that you can tune on a system like this is how fast the exhaust leaves the engine which adds power or if the flow isn't enough robs power. a small valve would allow me to tune on the go which i think would be a big help.
Cupooterluvr
Hardcore RCTalk User
The most you can do on a 2 stroke is put a good pipe on. The dual stinger pipe is just crap. You can't polish a turd. Plugging 2 of the holes will give you sufficient backpressure for it to run reliably, but you will still get poor performance, no matter what you do to the pipe.
EDIT: Explanation: the dual stinger pipe may or may not be tuned, but when they were designing it, they obviously didn't test it. It's the expansion chamber in any tuned pipe that forms the 'waves' that push fresh fuel/air mixture back into the combustion chamber on a 2 stroke (since the exhaust and intake are open at the same time). The dual stinger pipe just wasn't designed with that concept in mind.
EDIT: Explanation: the dual stinger pipe may or may not be tuned, but when they were designing it, they obviously didn't test it. It's the expansion chamber in any tuned pipe that forms the 'waves' that push fresh fuel/air mixture back into the combustion chamber on a 2 stroke (since the exhaust and intake are open at the same time). The dual stinger pipe just wasn't designed with that concept in mind.
Last edited:
Metalhead Matt
RCTalk VIP
The rubber pressure line melting should seal the fitting. Do your engine a favor and put the resonator back on. After ya spring for a new header.
Last edited:
- Thread starter
- #10
the header is from integy and just from the weight you can tell its cheap but it works and looks good. and i don't think the line will melt. if it does i can get some better tubing. and all this about waves going back to an engine is crap. you dont want exhaust going back to your engine unless it is to a turbo system. this article explains back pressure very well so go check it out. http://www.thumpertalk.com/forum/showthread.php?t=659727 also last night i was thinking of a way to put a baffle in my exhaust system. as i was going to sleep i realized i could use the pivot ball caps. so i tried it for fitting and it fits great. a little hi temp glue and i can try it out. only problem is it will be about two weeks before i can put it back together.
Last edited:
Metalhead Matt
RCTalk VIP
Whatever you say. If ya didn't notice, that article is about 4 strokes. Car engines work a little differently then tiny 2 strokes. Baffle? Glue?! It's your time; no one can stop ya from wasting it. If ya think the sound wave thing is crap, maybe you should call Ofna, O.S., ect... and let them know their 30+ years of r@d was useless.
- Thread starter
- #12
exhaust is exhaust. and do you work for an rc engine company. no. then stop getting so upset. this is about the idea of using rear exhaust systems not about whats the best pipe. also why is it everyone with metal head in their name acts the same be it halo, cod, forza, and even these forums.
Metalhead Matt
RCTalk VIP
No one upset, here. I would just hate to see some kid try this and mess up his rig. It wouldn't matter if my name was Backstreet Bill; I'd still call ya out. WASTE OF TIME. Glue pivot balls to your exhaust? Come on. Just my opinion.
Metalhead Matt
RCTalk VIP
Did you try a 3.3 resonator? Works great on my buds Maxx. Just a thought. Hope this helps.
hotfoot777
RCTalk Basher
- Messages
- 42
- Reaction score
- 0
- Points
- 0
- RC Driving Style
you can tune any 2 stroke pipe by restricting or opening the exaust flow.
Cupooterluvr
Hardcore RCTalk User
If you don't believe us when we tell you that adding stuff to the exhaust won't help then drive on, troop. You may get better backpressure but the engine performance will suffer.
The only way to get more power out of a nitro besides engine port mods is a good tuned exhaust. The pipe you're talking about isn't tuned (or if it is, then badly) so just won't give you the power you'll get from even a Resonator.
As far as baffles, generally a profile of a pipe will show up to 3 chambers, each separated by a baffle. These are what provide the 'tune' of a tuned pipe. Adding them in random places won't do anything and may even hurt the performance.
I personally have a T-Maxx with a Picco .26 max on it. I use a Resonator tuned pipe on it and it works great. I'm sure I'd get better performance if I put a 1/8th scale pipe on it such as a JP-3, but I like the styling of the Resonator.
The only way to get more power out of a nitro besides engine port mods is a good tuned exhaust. The pipe you're talking about isn't tuned (or if it is, then badly) so just won't give you the power you'll get from even a Resonator.
As far as baffles, generally a profile of a pipe will show up to 3 chambers, each separated by a baffle. These are what provide the 'tune' of a tuned pipe. Adding them in random places won't do anything and may even hurt the performance.
I personally have a T-Maxx with a Picco .26 max on it. I use a Resonator tuned pipe on it and it works great. I'm sure I'd get better performance if I put a 1/8th scale pipe on it such as a JP-3, but I like the styling of the Resonator.
- Thread starter
- #18
tried the original pipe and didn't like it. i got the vantage racing pipe on my wish list but right now i am working with the rear exhaust. the standard side systems all sound the same so i am avoiding them. and i dont think there is anything in the integy can. its just a open space.
Last edited:
Cupooterluvr
Hardcore RCTalk User
Actually you'll find that different tunes produce different sounds. The stock plastic pipe on my Maxx is high pitched and annoying, but the Resonator produces a deep growl that sounds awesome.
I think the new Maxxes have different Resonators than I do. Mine is a dual chamber, top-end tuned pipe.
I think the new Maxxes have different Resonators than I do. Mine is a dual chamber, top-end tuned pipe.
- Thread starter
- #20
i really would prefer to have a rear exhaust system be it duals or a single routed to the back. when i pulled apart the old .15 pipe i got i noticed the removable baffle which got me thinking on ways to tune the integy can which i bet if i cut it open is empty.
Similar threads
