TRX250R.ORG
Workshop => Engine and Bottom End => Topic started by: supernutt on July 04, 2013, 05:00:01 PM
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I currently have a TRX5 pipe. This thing runs good up top but I would like more bottom end power. Tried a sparks mx---a little better low end but not nearly as much top end, old beater FMF H-49 which didnt run good anywhere, and a old PT trx race pipe which was a lightswitch. I just want an unbiased opinion on what pipe would do this for me. Going on a C-Leigh midrange ported 72.25 pro x cylinder 215psi compression. 38pwk carb and CR ignition. Rad valve. I know Neil likes the CT midrange pipe. I do play riding only mostly trails but they are fast trails. Thanks.
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I run CT midrange "national" pipes and they have great power through out, more lower end power. But as much as I hate ESR products that TRX5 is a great pipe. I would ask Neil what he thinks or suggests.
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I did talk to Neil and he said for short tracks he runs the CT midrange pipe and for longer tracks he runs the TRX5. Just wondering if any other pipes would work good.
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The PT type 6 is a good low end pipe. If you want to try one I have a couple I don't use any more.
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I thought about that. I hear it is ALL bottom end and doesnt rev out much at all. For play riding that might not be the hot ticket? And if it fits anything like my old TRX race does, I wouldnt want anything to do with it.. That pipe doesnt fit worth a crud!!!
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Your are right on that one. I have gone through and opened up the C shape in the front on all mine. Then install with special made exhaust brackets. The type 6 worked fine on the Puma because how much power do you need? Right. Did miss the top end rev and went with the LED puma pipe.
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i tried a PT type 6 on my sons and he hated it we ended up with 1 of the newer made Bills pipes and he seems to like it best. He says it hits harder in the low end than the trx5 or the fmf (not sure which 1 its older though) but still revs out thru the top moderatly good.
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I still have to be able to put a hurting on some 4 pokes on the wide open county roads so I cant loose ALL my top end. If the TRX5 is as good of a compromise as their is, I can live with it but just wondering if there is anything better. Really cant run more compression already at the limit of sunoco 110
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Supernutt, don't want to change the thread, just got a quick question. It looks like you are running a 310 kit with 215 psi compression. What octane fuel are you running?
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Sunoco 110
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I have the esr trx6 on a stock cylinder and it is perfect for the trail and hill climbing I do. On my pro-x is a ct pipe and it is excellent on the bottom end. I have always thought the ct pipes were one of the best low end setups on a pro-x. What type of porting do you have on the cylinder?
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Neil's low to midrange porting
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I would go with what neil says. He has probably tested the combo. Not sure if you could even buy ct pipes new anymore. Odds are they were built by kenny roberts.
I always had the same results you did with the trx5. For dunning it was fine running on the open dunes. But I found when I got into tight hill climbs it required a lot of work on the clutch to keep in the rpm where the pipe makes power. You would probably like the ct pipe it will pull down low where that trx5 won't. It will not pull the topend like the trx5 so it will be a little sacrifice.
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That's what I was looking for. Thank you
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i really like my lrd adjust. pipe.its on my 310, rad valve, 38mm a.s carb. r. i also had a sparks mx, but this lrd has low end and still pulls hard up top.
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Trx7
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Haven't heard much on the lrd adjustable pipes. I did think about a trx7 also. My trx5 fits perfect so maybe the 7 would be the same fit
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Brother to the 5 for more lower end and mid needs.
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Wih that porting and 215psi, you probably are better off focusing on a low-mid pipe and not worry as much about the topend over rev. Generally more compression will move the torque curve lower in the rpm range. All I have experience with are the trx5, trx9, lrd adjustable, and fmf and the trx5 works best for me. Like snowmaker and derby said, Neil knows what works with the way he set it up. I always trust what he tells me.
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Haven't heard much on the lrd adjustable pipes. I did think about a trx7 also. My trx5 fits perfect so maybe the 7 would be the same fit
The lrd seems pretty equal to the 5 through the low and midrange, but seems to sign off earlier. There were some other variables in my comparisson though. As far as the fit from esr pipes; they got the performance dialed in pretty good but the fitment is a crapshoot. One might fit perfect and the next not so much.