wesw Posted December 22, 2004 Report Share Posted December 22, 2004 yeah i will post info, including a dyno run, a video with my digital camcorder, and all that stuff. my setup should be +4 stroker, 200 deg port i think thats what jim called it. rocket pipes, and the usually mods. im about to bust a nut waiting for it to be finished Quote Link to comment Share on other sites More sharing options...
SDD Posted December 22, 2004 Report Share Posted December 22, 2004 The flat spot on is really noticeable when really stressing the motor aka long hill climbs in sand with paddles. On flat ground with regular tires you will not notice the flat spot. I believe adding reed spacers might help solve the problem but until I have two guys I know add reed spacers and run them in the dunes I won't know for sure. If you don't believe there is a flat spot you should hear from a member of this board with a 12 port 4mm stroker only getting 49 HP out of his motor. He will be the first one to try reed spacers to try to fix what I believe is the issue. I hope he finds this post and posts his findings. I'm not here to speak for him so if you have any questions on how his bike runs he's the one you need to ask. If you have a question about what I think is the problem I'll try to get someone to come in and post his findings and why reed spacers help the problem. Quote Link to comment Share on other sites More sharing options...
Ryda85 Posted December 23, 2004 Report Share Posted December 23, 2004 (edited) yea i will definitly post my results hopefully i will have some numbers in the 70 hp range at least. my mods will be: passion 12 port porting +4 mm stroker crank noss cool head 19cc domes +4 timing advance delta 2 reeds 34mm carbs barnet clutch hindson basket pro design impellor k&n intake rockets or cpis shift star mod and a lightened flywhell hopefully....shee will ripp Edited December 23, 2004 by Ryda85 Quote Link to comment Share on other sites More sharing options...
Redlined Posted December 23, 2004 Author Report Share Posted December 23, 2004 Here it is. This is the same one that I posted in the images section. Quote Link to comment Share on other sites More sharing options...
SDD Posted December 23, 2004 Report Share Posted December 23, 2004 Did you get any regular dyno charts of HP and TQ vs rpm? Quote Link to comment Share on other sites More sharing options...
Redlined Posted December 23, 2004 Author Report Share Posted December 23, 2004 (edited) Did you get any regular dyno charts of HP and TQ vs rpm? 296832[/snapback] This chart does show Torque and HP compared to RPM. You just have to work at it. The rpm is on the right hand side of the chart. You pick a point on the HP or Torque and draw a line up or down until it connects to the RPM line, then look to the right and that is the rpm at that HP/Torque. You might have to use the left side of your brain. Basically it Edited December 23, 2004 by Redlined Quote Link to comment Share on other sites More sharing options...
Banchetta Posted December 24, 2004 Report Share Posted December 24, 2004 (edited) This chart does show Torque and HP compared to RPM. You just have to work at it. The rpm is on the right hand side of the chart. You pick a point on the HP or Torque and draw a line up or down until it connects to the RPM line, then look to the right and that is the rpm at that HP/Torque. You might have to use the left side of your brain. Basically it Edited December 24, 2004 by Banchetta Quote Link to comment Share on other sites More sharing options...
Redlined Posted December 24, 2004 Author Report Share Posted December 24, 2004 so basically just put the image in a mirror and look at it and that'll be the graph.....I thought my dip was bad...thats expected from a dune port and high rev pipes though. Not bad, pulls quite a ways. Good hp and torque for top end...that dip is meaningless for dunes, but it would be a big problem for technical hill climbs. Your on/off the throttle on hill climbs and can't determine what rpm you'll be at when you land back onto the hill, thats where the dip would cause a problem which some people can't stand..This all depends on the type of riding some people do though. 80% or more shee owners wouldn't care about that dip and just ride through it and thats fine. Its the other 20% or less that are looking for perfection and smoothness where the shee is very predictable on the whole power curve. Sounds pointless to some, but very important to the guys that need to have full control where every split second counts, not speed, but handling and maneuvering....I'm not trying to bash your graph, just helping others understand the graphs and what to look for in them besides peak hp and torque....For a dune port, you have a perfect match of torque and hp at the higher rpm which is perfect for duning. The torque peaking at the higher rpms will give you much greater top speed and hard pull at the end of your revs...It'll create more tire spin on take off where the motor wants to be at 11000 instantly, but that doesn't matter when your duning since your riding at 60-90 mph....So I give Passion an "A" for the dune port... 297213[/snapback] Excellent Point Banchetta. That transition point doesn Quote Link to comment Share on other sites More sharing options...
rebelbanshee2 Posted December 24, 2004 Report Share Posted December 24, 2004 looks pretty good..expecially for a dune port. Looks like it comes on around 4500 rpm..similar to a gorr wood port. Hes right about the dip...they have so much power off the pipe that the couple hp dip before it hits is negligible. Ive not seen many banshees without a pre power band dip either. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted December 24, 2004 Report Share Posted December 24, 2004 looks pretty good..expecially for a dune port. Looks like it comes on around 4500 rpm..similar to a gorr wood port. Hes right about the dip...they have so much power off the pipe that the couple hp dip before it hits is negligible. Ive not seen many banshees without a pre power band dip either. 297628[/snapback] i dont wanna start an argument here but it looks to me like the power doesnt come on till about 6500rpm. my brothers big climb in power started right at 4500. looks to me like this engine starts around 6000 to 6500. anyone else seeing this? Quote Link to comment Share on other sites More sharing options...
PUSH THE THROTTLE Posted December 24, 2004 Report Share Posted December 24, 2004 looks to me like this engine starts around 6000 to 6500. anyone else seeing this? 297654[/snapback] I have to agree with Loco on this one, every dyno sheet is going to start climbing as you start giving it gas some but the significant power seems to be waiting until you hit 6000 to 6500 unlike the sheet STCLARK posted in the other thread, it still has a dip but it's minimal and shifted forward in the curve. Quote Link to comment Share on other sites More sharing options...
D34 Posted December 25, 2004 Report Share Posted December 25, 2004 i dont wanna start an argument here but it looks to me like the power doesnt come on till about 6500rpm. my brothers big climb in power started right at 4500. looks to me like this engine starts around 6000 to 6500. anyone else seeing this? 297654[/snapback] u quoted ur bro's woods port but what bout urs? urs didnt have a dip? Quote Link to comment Share on other sites More sharing options...
Redlined Posted December 25, 2004 Author Report Share Posted December 25, 2004 i dont wanna start an argument here but it looks to me like the power doesnt come on till about 6500rpm. my brothers big climb in power started right at 4500. looks to me like this engine starts around 6000 to 6500. anyone else seeing this? 297654[/snapback] You Quote Link to comment Share on other sites More sharing options...
PassionRE Posted December 25, 2004 Report Share Posted December 25, 2004 (edited) I was actually pretty pleased with this run considering its running high end Sheerers. The motor made 27hp at 5000 rpm, climbed 2 or 3hp between 5k and 6300 before it hit the pipe. Then it produced pretty good HP numbers at 45 ft. lbs and then continued to actually hit 11000RPM at near peak hp. I was very pleased with the performance of the Sheerers all in all. 11K and still have off idle grunt! Thats pretty damn good. Something to build off of and try to improve even more if nothing else...Jim Edited December 25, 2004 by PassionRE Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted December 25, 2004 Report Share Posted December 25, 2004 u quoted ur bro's woods port but what bout urs? urs didnt have a dip? 297667[/snapback] i couldnt even read my dyno sheet. it looked worse than my brothers. next week sometime ill be headin to a different dyno in my area that my builder was tellin me about. hopefully he will have a printer that is worth a fuck and then ill be able to tell for sure. I Quote Link to comment Share on other sites More sharing options...
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