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Custom 27 Pipe
- Thread starter El Pirata
- Start date
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Now I am getting interested in pipe lengths. I have a few sitting around for my maxx.
It seems the longer the better.
The maxx plastic pipe bites.
The THS is a better pipe for torue and rpm.
The XTM generic pipe is longer (stadium truck) It makes a huge difference above both the THS and the stock maxx pipe. The THS makes a very small difference. Now I'm going o have to experiment.
It seems the longer the better.
The maxx plastic pipe bites.
The THS is a better pipe for torue and rpm.
The XTM generic pipe is longer (stadium truck) It makes a huge difference above both the THS and the stock maxx pipe. The THS makes a very small difference. Now I'm going o have to experiment.
El Pirata
RCTalk VIP
- Thread starter
- #23
Not necessarily. Th reason this pipe worked great is due to the fact that it has a 3 chamber internal cavity. The first chamber is about 4" from where the coupler connects the pipe to the header. This is actually a washer like division between the 1st and 2nd chamber. The remaining chambers are merely to muffle the sound.
The shock waves hit the wall of the first chamber and are reflected back to the engine. In the case of idling the shockwaves are reflected back too early but once the engine gets some higher end rpms on it the pipe is tuned especially well for that.
I have another test pipe which is an ofna pipe that has about 1" of length so that it will be tuned better for higher end rpms but losing some lower end power. While they call it a tuned pipe, the interior is mostly a single chamber so there's now about 4" before the shockwave hits the end of the pipe and is reflected back.
I talked extensively with Ritter about this and shortening of the pipes to increase upper end hp. As a result of the shape of the inside of the pipe that will be reflecting the shock waves at about 4" the remaining 4" of the pipe really is only there to quiet the sound.
Essencially you could take a non-tuned/non-muffled .15 pipe and slap it on a 21 with similar results. I had initially tried this when I put a .21 on my t-maxx using a stinger pipe, which was the only spare pipe I owned. Thinging the stinger of the pipe was not going to be large enough for a .21 I drilled a few holes in near the stinger to allow higher flow of exhaust. As a side effect the pipe sucked. I had just been thinking it was because it was a crappy pipe and I was using a .15 pipe on a .21 but the case was highly probably the holes I drilled ruined this before it could really be tried.
If I hadn't mentioned it earlier the stinger on our custom pipe is about 1mm smaller ID than a .21 pipe. This small stinger on an engine that produces more exhaust volume will keep your fuel system pressurized better than you could possibly imagine.
If you were really feeling ducky try a fully open pipe for one size smaller and see how she works.
The shock waves hit the wall of the first chamber and are reflected back to the engine. In the case of idling the shockwaves are reflected back too early but once the engine gets some higher end rpms on it the pipe is tuned especially well for that.
I have another test pipe which is an ofna pipe that has about 1" of length so that it will be tuned better for higher end rpms but losing some lower end power. While they call it a tuned pipe, the interior is mostly a single chamber so there's now about 4" before the shockwave hits the end of the pipe and is reflected back.
I talked extensively with Ritter about this and shortening of the pipes to increase upper end hp. As a result of the shape of the inside of the pipe that will be reflecting the shock waves at about 4" the remaining 4" of the pipe really is only there to quiet the sound.
Essencially you could take a non-tuned/non-muffled .15 pipe and slap it on a 21 with similar results. I had initially tried this when I put a .21 on my t-maxx using a stinger pipe, which was the only spare pipe I owned. Thinging the stinger of the pipe was not going to be large enough for a .21 I drilled a few holes in near the stinger to allow higher flow of exhaust. As a side effect the pipe sucked. I had just been thinking it was because it was a crappy pipe and I was using a .15 pipe on a .21 but the case was highly probably the holes I drilled ruined this before it could really be tried.
If I hadn't mentioned it earlier the stinger on our custom pipe is about 1mm smaller ID than a .21 pipe. This small stinger on an engine that produces more exhaust volume will keep your fuel system pressurized better than you could possibly imagine.
If you were really feeling ducky try a fully open pipe for one size smaller and see how she works.
EP this really is good timing for a member project on a custom pipe since I will install my Paris AL2000 on the S-25 soon. I was once approached with the idea of using a heli pipe but thought it was a little overkill since I'm still a rookie :shhh: but I guess there is always a way to make the impossible possible.
What type of pressure fitting are you using? Is it self-tapping or did you use another install method?
I chosed this on road high rpm pipe in an attempt to achieve all around performance throughout the rpm range. Yeah I will probably lose low end but hopefully I'll gain elsewhere and can adjust the gearing to compensate for losses.
I will check back periodically on the status of your and Error's customized creation. I'm open to suggestions on my set up (do's and don't's) if you have any.
Nice job!
What type of pressure fitting are you using? Is it self-tapping or did you use another install method?
I chosed this on road high rpm pipe in an attempt to achieve all around performance throughout the rpm range. Yeah I will probably lose low end but hopefully I'll gain elsewhere and can adjust the gearing to compensate for losses.
I will check back periodically on the status of your and Error's customized creation. I'm open to suggestions on my set up (do's and don't's) if you have any.
Nice job!
H
hb1111
Guest
i used to own a moped shop where we hopped up mopeds we took them put a big bore,a pipe, a carb and some gearing and could get a honda moped doing 70 mph with wheel standing power at this time experimented with several diffrent pipes and you would not believe how much diffrence it makes like night and day the best are chamber pipes,thats why i think ritter pipes must be good because if he make them for quads he knows what I'm talking about I'm thinking of making a ring pipe with a expantion chamber i think i need a tig but i got a mig i think i can pull it off ill let you know how it goes just need time busy working. great job el pirata i just bought a ths pipe and this thing sounds like its plugged up it needs a pipe that can breath. aloha...
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