TRX250R.ORG
General => Lounge => Topic started by: aberegg05 on January 23, 2014, 09:45:06 PM
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I'm about to buy a 330 non p/v off of esr set up on a 4mm stroker. What should I expect in performance?
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nothing but power man, i have a 350 non stroker and it fall out rips could not be happier
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76mm X 76mm motors are nice. No idea what you're running now though..
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Only running stock with cr ignition as of now
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Depends also which porting you choose and what riding you will be doing. If you're mainly stock, you would benefit from buying a complete package with carb and exhaust.
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That will be a good setup. As stated what carb, ex, etc do you have or are you getting that as well?
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I have a 39mm pj carb, cr ign, and a fmf fatty
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Cool, imo consider fatty replcement when you have the spare mula.
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I'm not to attached to it. I'm liking what I hear about the led pipes
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ESR's rock as well. 7 tighter woods, 5 everything, 9 dunes and open area's are all top notch pipes for thier intended use. B's for this.
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Speaking of esr I read where a forum member posted that they were installing a new cnc mill this week. Wow, continuing to reinvest more and more into making 250r products. Sweet, thanks esr!!
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Well just talked to eddie. 330 is purchased! Will arrive by next wednesday. Comes with race gas dome and trx 9 hand porting
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Very cool. Congrats. With your cr ig, 39mm, etc you are off and running. Pipe time. You could still use your silencer that you have with your fatty if you need to with thier b's.
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Ever heard of a dyno port pipe? I have one and never heard of them
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I have never tried one but have read others that have say that they are not equal to the other options listed above. You own it you can test it or go with sure winners TRX5b or TRX9b etc.
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Ever heard of a dyno port pipe? I have one and never heard of them
They show up once and a while in the R community. Some guys swear by them while others have never heard of them. Personally, I've never seen one nor have I seen dyno comparisons with other similar pipes. Dynoport seems to be more popular in the sled industry than the ATV industry.
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If you can ride now pull that fmf and try it out. You are going big though so a b pipe might be better for you from that point alone. Just watch your temps a bit if you run this with your new kit at first to see where your going to be at.
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Dyno port or Krank-It are killer small bore pipes!! But like etccb said above, your up there in the higher cc range and it may not be enough pipe. My Krank-it pipe flat out killed my Sparks Mx on a Hall ported 265, biggest mistake I ever made selling that pipe/silencer. Fyi, Scott at Krank-it hand welded/built pipes from Dyno port stamped pieces that he got from them.
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(http://forums.trx250r.org/vbulletin_imports/355_323_2017-04-18_9198.jpg)
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Yep, good pipe there. Do you have the other piece and the silencer?
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Yes I sure do. Whole exhaust
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How would this pipe do with my set up?
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It might be on the small side, like ecctb said you would have to watch your temps pretty close. On a side note though, pm me if you ever decide to sell it!
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LED got esr cylinders!!! Let him do your work for you that's if you don't want to spend the extra on a LED cylinder. I posted a dyno chart from my cylinder port by esr and then fix by Arlen at LED
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That chart posted shows a trx7 low end woods port and trx 9b top end pipe. That is not a match to compare to anything that was made to work together and doesn't really represent itself.
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Arlan tested Esr cylinder with 3 pipes and it never got over 54 hp just go Ed to show how a properly set up motor will do
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I know this is an older thread, but for what it's worth DynoPort pipes are a WORKS pipe designed to pull throughout the RPM range, the owner Rich Daly is obsessive about performance; I run his pipes on everything I own and swear by them. You won't have to work so hard to stay on the pipe with his chambers, but they are designed for a specific displacement range. So if you want performance details for you application, call him directly; they are still in business but do mostly sled stuff now since the quad industry went to 4-stroke. Krank-It pipes are essentially relabled DynoPort pipes, and are equally good. Scott Carey at Krank-It used to build some incredibly nasty 2-strokes, mainly 250R motors back in the day. My Blaster has a Krank-It motor in it, and it really puts out.
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I have never tried one but have read others that have say that they are not equal to the other options listed above. You own it you can test it or go with sure winners TRX5b or TRX9b etc.
Just in case you didn't know, etccb or anyone else for that matter, from now on when you buy a pipe it is already set up as a "b" pipe. Eddie did some testing and concluded that "b" really didn't help or hurt the power on the 310s, but it was a decent improvement for anything about 310cc.