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brucifer
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1# |
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From: USA
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03/19/2005
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(Date Posted:05/20/2007 4:41 AM)
I have a lot of respect for ya Tiny, you're a true hot rodder. What you're doin' is just too cool! I'm curious what that things gonna dyno when you're through. Keep us posted and good luck to ya. Bruce
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'06 Buell Ulysses 01 XR650R 75 XL350 84 XL600R 86 TT600 77 XT500
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generatorshovel
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2# |
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(Date Posted:05/20/2007 6:06 PM)
The only dyno it'll see is that big white salty one that's only open once a year, so long as it don't rain.
My next goal is 85 MPH, but a predicted 17 BHP pushing a not too aerodynamic ME through the air is going to be a BIG ask, but I'll be happy if, when the time comes to fire it up, it holds together for 10 minutes, the rest would just be a bonus.
My last successful (and 1st) salt run seemed like the longest kilometer I've done in my life, with the EGT hovering around 1300 degrees BEFORE hitting the tst timing light, rolling off to 2/3rd throttle, reducing ex temp to 1200 degrees and averaging 71 MPH over the measured distance, thats why I'm going for water cooling, ceramic coated piston, and cooling oil directed to the under side of the crown.
Will it work ? who knows?
http://i156.photobucket.com/albums/t24/generatorshovel/08build.jpg
Tiny
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It CAN be done
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Motoracer838
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3# |
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RE:DOHC 161cc LSR project update
(Date Posted:12/15/2007 12:37 PM)
Just saw your photobucket pic, that is so cool. It looks like youv'e used a lower end from a 100/125 and layed the cylinder down, how's it progressing? Joe
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generatorshovel
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4# |
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RE:DOHC 161cc LSR project update
(Date Posted:12/23/2007 5:13 AM)
Yeah Joe, well , almost right,,it's a CB 125 bottom end , picked 'cos of its positively fed primary side main bearing oiling , and the fact it was sitting on top of the honda engine pile when I started the project. the cylinder angle is now 11 degrees from horizontal (like the CT 110 it's based on) If anyone's thinking of doing this modification, I strongly suggest you " borrow " some of grandma's Vallium pills first. While milling the crankcases to take the new sleeve ('99 FZR in a '93 cylinder) I broke into the main oilGallery , the one that supplies EVERTHING !,,1 week before christmas, when all the Tig specialists want to sit on their butts and get drunk ! I quickly cut and rolled up an aluminium patch to cover the break thru and approached the man who's done all the other Tig'n on the engine, and suprise suprise, in 2 hrs , the job was done ! Thanks Jamie . The new frame is almost finished, which will put me into a new class , A/F 175 ,and I'm setting up the engine in it , today was cardboard cutout day (paper dolls come later) . Another job looming is to work out what lift / duration Yamaha use on the FZR , compare the readings to some after market cams , and settle with a figure that'll meet my 9,000rom + needs. Then there's the problem arising when you take a mostly splash and gravity fed camshaft lobe(s) / cam followers / valve spring setup and lay 'em down so gravity only oils the valve covers instead. I've cut the side out of and old clutch side cover and rigged up a starter motor to spin the oil pump (yeah , the thing that's designed to supply hi flow / lo pressure to a roller big end bearing, and make it deliver hi pressure,low flow to the new slipper big end bearing and dump the extra flow via a pressure reliefe valve -something else I had to make ) so as to check my pressure / flow to all that needs oiling , without actually starting the engine. Here's some more pics (not up to date )
(Message edited by generatorshovel on 12/23/2007 5:57 AM)
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It CAN be done
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Motoracer838
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5# |
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RE:DOHC 161cc LSR project update
(Date Posted:01/05/2008 10:15 PM)
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generatorshovel
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6# |
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RE:DOHC 161cc LSR project update
(Date Posted:01/07/2008 6:55 AM)
| Reply to Motoracer838(05/19/2007 2:15 PM).. |
Ill keep updating the photobucket site (there's a few newies in it since the link posting), check whenever you feel the need. I had some success with the cam(s) timing, it turns out the ebay'd cams were megacycle "factory road race" grind, wooohoooo ! Tiny
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It CAN be done
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generatorshovel
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7# |
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RE:DOHC 161cc LSR project update
(Date Posted:02/27/2008 1:57 AM)
Well, the oil pressure / flow test was a disaster  , it seems my 'ol eyes missed a secret oilway/crach behind the main oil gallery, in the area of the new cylinder deck, plenty of oil for the r/h side of the piston skirt, but that's all. Plan "B" time I always had concerns that once the gearbox / big end/ r/h main bearing, and the top end eagerly consumed the available oil supply, the big end slipper bearing would starve for hi pressure oil feed. Out with the thinking cap again. I tapped into the main oil gallery @ the front of the engine, adjacent to the cast gallery coming from the oil pump, filed the original gallery, and fed the oil into a modified air rifle barrel  , which fits into the clutch cover, bypasses the original centrifical filter (on the end of the crank) and feeds the oil PAST the main bearing oiling supply hole in the crank, assuring full pressure to the big end bearing. the air rifle barrell is machined to 8mm, then 7.7 mm, and finally, 6mm , (the size of the center of the crank, past the main bearing supply), this is threaded to 8mm x 1.25 to hold it in place in the clutch cover, and the thread will also help to keep the oil @ 55 PSI before finding its way past the main bearing oiler, and into the clutch area. There is also a 55 PSI pressure regulator in the circuit,and a diffuser to feed the cams, and the oil cooling nozzle (for piston crown) then the excess oil pressure is dropped down to 10 PS! , fed back into what's left of the original oil gallery, to feed the gearbox shafts, all other oil is dumped back into the crankcase. No pics as yet, but this week end SHOULD see a successful test, of the bottom end pressure / flow, then, the head's feed, and the oil nozzle's turn. Life was never meant to be easy ? Hopefully,,the bike will be ready for when the salt dries out, probably in march 09 ? Tiny
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It CAN be done
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