22LikesHoustons Engine Service H.E.S.
03-28-2010 | 07:46 PM
#2806
03-29-2010 | 03:03 AM
#2807
Tech Master
Joined: Jul 2009
Posts: 1,792
From: Frederikshavn, Denmark
i understand the mechanics of a clutch and how to tune the clutch to track conditions lil bror .
the interesting part is the gearing and how final rollout (gear ratio) effects the engine and its power production . the 32 pitch gears we use for 1/8th scale have a pretty broad spread from one gear to the next so it is a little harder to dial in then a 10th scale is . a lot of thought has been put in to the gear ratios on the 8th scale vehicles before they have been released to the public and is usually pretty darn good
some buggys have different ring/pinion gear ratios (associated uses truggy gears) and that lets you use large clutch bells with more gears on them , good concept? seems to work fairly well 
we are all fools 
i for one would love to tap into the vast amount of friction materials that are out there and apply them to our rc vehicle clutch shoes impulse rc
two cents worth and just a ramble
the interesting part is the gearing and how final rollout (gear ratio) effects the engine and its power production . the 32 pitch gears we use for 1/8th scale have a pretty broad spread from one gear to the next so it is a little harder to dial in then a 10th scale is . a lot of thought has been put in to the gear ratios on the 8th scale vehicles before they have been released to the public and is usually pretty darn good
some buggys have different ring/pinion gear ratios (associated uses truggy gears) and that lets you use large clutch bells with more gears on them , good concept? seems to work fairly well we are all fools
i for one would love to tap into the vast amount of friction materials that are out there and apply them to our rc vehicle clutch shoes
impulse rctwo cents worth and just a ramble
Year, I know you are the expert. I'm not trying to say anything else
Here is the gearings you can make on a XRAY buggy:
As you can see, the steps are really small when it comes to bell/center diff ratio.
Cheers
03-29-2010 | 08:35 AM
#2808
Ya , you are able to go in small increments if you change spur and clutch bell combos but just changing clutch bell a tooth changes the gear ratio quite a bit and chenges all the characteristics of the engine
Just changing the clutch bell is what most people do
03-29-2010 | 12:24 PM
#2809
Tech Master
Joined: Jul 2009
Posts: 1,792
From: Frederikshavn, Denmark
Cool Monty 
Another question:
Is the 41005 shorter than a 41021 header?
What about he 41001?
... Or is it just the shape that makes the difference?
I would like to try a header, that is approximate 1 cm shorter than th 41021.
Cheers
Another question:
Is the 41005 shorter than a 41021 header?
What about he 41001?
... Or is it just the shape that makes the difference?
I would like to try a header, that is approximate 1 cm shorter than th 41021.
Cheers
03-29-2010 | 01:02 PM
#2810
1 cm shorter than the 41021 ? i would say try the ofna/jammin round header , i believe it is a little shorter than the 41021 .
the double bend headers from short to long 41019 , 41001 , 41005
try evrything and educate yourself , this will allow you to see what works best for you
remember after you change pipe/header you will have to retune the engine
03-29-2010 | 04:57 PM
#2812
03-29-2010 | 07:34 PM
#2813
Tech Addict
Joined: Apr 2008
Posts: 544
Hey Monty, I got an unusual problem w/ my Toro. A few races ago it went crazy rich in the middle of a race and couldn't figure out why. Had a new TKO front bearing put in and had it pinched while it was apart figured it couldn't hurt. Last week I was letting my dad run it, and during his race it did the same thing. It was so rich and happened so abruptly, I at first thought the throttle linkage was getting hung up and not opening all the way. I ended up leaning the top 2 full turns to get it to get on the pipe. It ran fine for the rest of the race, came off the track at like 210 or so, and still a little fat. Any idea what could have caused it.
03-29-2010 | 07:57 PM
#2818
Hey Monty, I got an unusual problem w/ my Toro. A few races ago it went crazy rich in the middle of a race and couldn't figure out why. Had a new TKO front bearing put in and had it pinched while it was apart figured it couldn't hurt. Last week I was letting my dad run it, and during his race it did the same thing. It was so rich and happened so abruptly, I at first thought the throttle linkage was getting hung up and not opening all the way. I ended up leaning the top 2 full turns to get it to get on the pipe. It ran fine for the rest of the race, came off the track at like 210 or so, and still a little fat. Any idea what could have caused it.
03-30-2010 | 05:56 PM
#2820
Tech Addict
Joined: Apr 2008
Posts: 544
I wasn't able to find a leak. pressure checked my tank and filled it with fuel to check it. I'm gonn replace it anyway. Just curious though, I would think a leaky fuel tank would cause a lean condition, not rich?