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Originally posted by Garry_rxz
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Garry, this discussion is almost a year old.**MaSh**
**Work to Ride and Ride to Work** -
But the query on calculation is still relevant. Isn't it?Originally posted by MaSh View Post
. So as long as discussion is focussed on given topic, I don't see a newer thread becomes more relevant than an older thread. Though I have no idea what the query is all about 
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He he Exactly my point. I doubt the previous participants would return to answer the query. That is all i was telling Garry. Yes, it would be wonderful if a new set of guys could restart the discussion by adding information.Originally posted by kaynmantis View PostBut the query on calculation is still relevant. Isn't it?. So as long as discussion is focussed on given topic, I don't see a newer thread becomes more relevant than an older thread. Though I have no idea what the query is all about .**MaSh**
**Work to Ride and Ride to Work**Comment
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BMEP = base mean effective pressure.
exhaust port dia = dia of the circle of area equal to the cross sectional area of the exhaust port. and the cross sectional area is not the thing you get from a port map you get from the rolled paper method. you have to compensate a bit for the curvature.
exhaust gas temp = the temperature of gasses exiting the exhaust port. (i think) and that depends on a huge number of factors like ignition timing, compression, fuel quality etc.
if you want to build a pipe i strongly recommend reading either Graham Bell, Jennings or Blair... or even all of them. you will be flying blind... going backwards on second hand info.
except Blair, the books are easily available in pdfs on the net. as i say, ignorance is not an option, the info is easily available.
and kya atul, he was asking what a EGT is and you are ready with a pipe for him! lol!AbhishekComment
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i have tried designing a tuned pipe for my bike also....
faced problems in calculating exhaust duration.....
can some one help thou......
thankz..Comment
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noob query - what are the max revs one can realistically expect from a 5 speed bore? considering that the CDI is stock, and maybe later on a RDD CDI or something??
My offerings to the gods of speed -
- KTM Duke 200
- Yamaha RXZ 5 speed
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@ braindead
Thanks.Although knew that.The thing is i need a good starting point using that 'free' s/w.
ex. port affective dia= done!
dia at barrel flange ..here it gets slightly confusing for me, that flange = b/w the carb and barrel. right?
piston face to flange= length from the ex. gasket to piston face right?
Old post is dug up. I know.Still better than starting a new thread.
Stock RXZ 5 speed revs. upto 7500 RPM.
with RDD, ull get approx 1k over revs.Last edited by Garry_rxz; 10-31-2009, 10:26 AM.Comment
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from personal experience, i've seen stock 5 speed bores touch 11k with pipe..not on a wire tacho, a proper digi tacho. stock CDI, killer pipe, big carb..thats all
83' RD350 HT
96' RXG
97' RXZ
91'RX100>09'RX165
2010' HH ZMR
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@ braindead - have you read up on "shifting the powerband" by graham bell.. with smaller ports and duration and still having a crazy powerband..thats what the RZ/RX run..tinier duration but explosive powerband.
83' RD350 HT
96' RXG
97' RXZ
91'RX100>09'RX165
2010' HH ZMR
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Atul the big pipe which you are taliking comes with how manys section headers ? and what's the belly size ?"Engine tuning is not an exact science, but with some practice and patience you'll get comfortable with your skill and be able tune for any conditions mother nature throws at you"
Still the Boss -- RX 135Comment
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What atul says is kinda true. I myself hit 98 true on 3rd. Had stock bore+head, stock carbs, stock pipe, 15/34 sprockets, a custom air filter. Cant say exactly how many revs, but i'm sure it was on the higher side of 9000
Try to hear and guess how much the bike revved in 3rd and 4th:
YouTube - Run 2 on 12 May 08
Atul, what tacho you using?Last edited by SunnyBoi; 10-31-2009, 06:55 PM.Yamaha RX165 5-Speed
Yamaha RD350
HH Karizma
Honda NSR150SPComment
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the dia at barrel flange is for your exhaust flange... your stock bendpipe internal dia basically.
and atul, i do vaguely remember reading something like that. will go through bell again. i am not really an engine guy... you will have to ask my brother about all that.
AbhishekComment
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@ sunny - the one i saw had some digital tacho which takes readings from the coil..it has just one black wire u conenect to the HT coil lead..takes reading from the coil EMI
@ psycho - motorhead built 2 pipes..one for sunny and one for me..the one sunny has is a 11 section header [AFAIK] and the one i had was a 10 section..pipe tuned length was longer for sunny though.
@ sling - ofc i always ask ur brother he's the reason we have a few fast strokers going in here
83' RD350 HT
96' RXG
97' RXZ
91'RX100>09'RX165
2010' HH ZMR
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Pipe does work wonders.
Higher revs coz of pipe,carb etc and not touching the ports is Very much acceptable.
There is a s/w available on buildandclick dot com .... there seems to be some error, so unable to buy the software. Anyone tried recently?
Mota is on the costlier side for me.
Will work out a basic design as a starting point using the IWT freebie s/w.
Can the tuned length of a chamber be altered once its built?( Play with the convergent cone)Comment
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^ LMAO..so when do you start building your pipe garry? Oh btw thanks for accepting the fact that pipe "does" work wonders. I'd be kinda lost if it weren't for your confirmation.
why dont you tell us how you intend on building the header of that pipe..how do you intend on cutting the sections..It would be an enlightening experience. We all are hoping to learn from you mate
Cheers83' RD350 HT
96' RXG
97' RXZ
91'RX100>09'RX165
2010' HH ZMR
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