| Author | Message | ||
     Onlyblue |
What methods have proven worthwhile at reducing the Buell engine temp? My S3 with fewer than a thousand miles starts having idle speed spasms between 1300 and 1500 rpm if it gets a little on the hot side. Any info on oil coolers or increasing engine oil capacity would be appreciated. | ||
| Bigblock |
The Jagg oil cooler works great, and you can install a tall Dyna glide filter for a little more oil, helps cooling a bit, too. Ray | ||
| Onlyblue |
Bigblock,thanks for the response. I had bookmarked the JAGG homepage. It's good to get a reference before considering an expense of $250 for the oil cooler. Before installing the JAGG, I will switch to a synthetic engine oil and monitor temp changes, if any. A really interesting article about various engine oils caught my attention. It compared automobile and motorcycle oils. You'd be surprised at how much nonsense the MC dealers hand out in order to get $6.00 a quart for oil. Check this out: http://www.nightrider.com/biketech/oiltest1.htm | ||
| Bigblock |
Blue, I just changed to synthetic yesterday, I think she likes it! I would also recommend the bypass valve for the Jagg, helps the bike warm quicker, and I don't need to turn it on on cool days 'cuz it works that good! Keep in mind I have a carburated bike, they like a little more heat than the F.I. models. And don't forget the tall filter! Happy Buelling! | ||
| Blake |
ONlyblue: I'm thinking the heat ain't your problem. Even somewhat hot, the bike should idle fine. Check timing and check intake for leaks at manifold. | ||
| Pammy |
Blake, you sound right on about the possible intake leak. That nightrider article is full of •••• for the most part. I have a lot of stuff in my shop that I don't make a great profit on. I carry what is best. And if you don't think metal shear has a great effect on oil viscosity and integrity, then why don't you put some .99 cent Castrol in your car's tranny instead of that expensive transmission fluid. I even run 'motorcycle' oil in my cars..Amsoil is my liquid of choice at this time..... P.S. I would NEVER put STP oil,gas, or any other kind of additive in anything I own. Pammy.... | ||
| Bigblock |
If your drag racing a stick, drain the gear lube and run synthetic oil, just change it once a year. That atf crap they run in gearboxes now is CRAP you're better off with 90w or synthetic. Any synthetic oil is generally better than any petroleum. All racers run synthetic. Car, bike, airplane, boat, you name it. Must be a reason. And don't forget, ain't no gearbox running on OUR engine oil, this is a Buell website, isn't it?  Ray | ||
| Y2k01x1 |
does anyone have info on the billet spin-on type oil coolers in the ASB catalog? i'm thinking of getting one for my x1. real clean, no lines, no plumbing, and no huge finned contraption clamped to your frame tube. but do they work and are they reliable? thanx! | ||
| Dark_Ninja |
Okay, here goes. Since this is my first air twin my ignorance is going to show here, but I want to ask some people who know more than I do. Is there a particular reason that a Buell shouldn't rev above 6800 R.P.M.? I've got a EE degree hanging around packed in a box somewhere's and I was thinking about tinkering with my ECM to allow a higher rev limit. I am SURE that someone is going to jump in here and tell me it's a bad idea, but when you do...tell me WHY it's a bad idea, from the engines mechanical point of view. Thank, I look forward to being educated! | ||
| Jasonl |
The only Buell I know that saw 7k spun a bearing in the bottom end. Also I don't think the valve train can sustain speeds higher than 6800 indefinitely. These are just the reasons I can think of to leave the rev limit @ 6800. I'm sure someone else has some better reasons. | ||
| Aaron |
piston speeds (increased wear) valve float (unless you beef it up) the fact that your power probably hits it's peak at 6500 | ||
| Chuck |
To quote a friend --- "anything over 6800 will cause you to involuntarily become a Harley "parts distributor""  | ||
| José_Quiñones |
Maximum safe piston speed for these motors is about 4500 ft/sec. The formula: Piston speed in ft/sec = Stroke x RPM x 0.1666 For 3.8" stroke, 6800 rpm is 4319 ft/sec 7,111 rpm gives you exactly 4,500 ft/sec As mentioned before, the valvetrain is what limits the motor the most. The Tilley Buell Race bike does spin up to these speeds. Last year it didn't finish many races. We'll see this year. | ||
| Hans |
Phew, That is Mach III: 4500 ft/sec ???? Hans. | ||
| Hans |
Let`s try metrical numbers: stroke 96.8 mm RPM 6800/min Per minute 96.8*6800=658240 mm = 658.24 meter per second: 658.24 meter/60=10.97 meter second 10.97 meter/second is 36 foot/second. That is not too fast. Must be the drivetrain indeed. Hans. | ||
| Jasonl |
Metric is for SISSYS who can't do fractions! (that would include me but I'm just a product of the american education system. where's ma guns?) | ||
| Hans |
Oh, Oh, made a mistake: the piston passes the stroke lenght two times per revolution. So the mean piston speed has to be doubled: 22 meter/sec or 72 foot/second at 6800 RPM. And that is a considerable piston speed. Hans. | ||
| Svangeldern |
My new cam cover  Steve  . | ||
| Svangeldern |
My new cam cover  Steve . | ||
| Bluzm2 |
Steve, Nice cam cover, all cut down and polished up like that! Hmmm, I'll bet your right leg gets a bit warm from the ultra short headers. Plus, I'll also bet that dangley thing on your shock makes riding a bit noisy. That is of course if you can hear the banging and clanging over the exhaust note from the ultra short headers! ;-) BluzM2 (just kidding of course!) | ||
| Bluzm2 |
Jeez Brad! Wake up dude! Steve, no kidding here, looks like a seriously cool ride. Which pipe are you going to put on it to match the way kewl RAM swingarm? How stock isn't your motor? Come on buddy, details, details! Love the Molton Orange. BluzM2 | ||
| Ralph |
Steve, it probably would have been better if you had left the dowel pin in place. Keep an eye out for leaks. The two dowels (one in the front and one in the rear) actually locate the cam cover. Those many bolts just hold it down. There is the possibility of the cover "scrubbing" the gasket away. Not a sure thing mind you, just a possibility. Here's a picture of mine again. By the way, it's attached to my newly finished Axtell Mountain motor!!! WOOOO HOOOOO!!!!  bighairyralph | ||
| Ralph |
Aaron, Mr Dickey and I were speaking of your great success with the nitrous. He was a little worried about the possibility of burning a valve though. For you guys who've never seen how terrible this can be here's a photo.  | ||
| Ralph |
Wait, that picture sucks! It doesn't give you the real enormity of the problem! Here, try this one.  bighairyralph | ||
| Ralph |
Ah, that was to good to pass up. Here are a couple photo's of the Zippers CNC ported heads and another view of the massive bore. See ya'll later. I gotta get some sleep so I can have a clear head and get that sucker in tommorow! bighairyralph | ||
| Airborne |
For the Mechanical Engineer guys: I read a ad one time for a product that went something like this. "This piston weighs approx 2 lbs. Do you know how much it weighs when the engine is running? About as much as a grand piano" You guys have part of the answer right about piston speed. What about the weight of the piston and the pressure it causes against the connecting rods and the single crank pin as the piston decelerates and accelerates at the top and bottom of the stroke? Can you say "Thrown Rod" I can only think of one push rod valve train motor design that goes up to 8500rpm and that is in a NASCAR motor. Before a contest starts I'm agreeing with the "Valve train limits the motor most" statement made earlier. | ||
| Svangeldern |
Headers, what headers? If you look closely to the picture you can see a rag stuck in the head. This is how I have developed over 200 HP at the rear wheel. Like the spin doctors at big tobacco companies, tubing manufactures have convinced the masses that you need headers.......more headers more tube......not true! As for the "dangly thing"....it is a "pre-bump" sensor I am devloping. You see, it rides close to the road and senses bumps prior to the rear wheel actually comming in contact with the bump. Through a series of microprocessors (mounted in the oil tank for optimum heat dissapation) the spring rate and damping are adjusted every nanosecond. Serously, besides a Mikuni carb the motor is stock (and next on the list). Steve | ||
| S2no1 |
Ralph, Is that from a stationary compressor motor for Natural Gas? Those engines are great. I magged one by crawling all around the inside of the crank case (that's right you could get in and stand up in the crank case between the crank and case). That was a V12 with about a 3 ft bore and a 4 ft. stroke give or take a few inches. Arvel | ||
| José_Quiñones |
 Oops I meant 4500 ft/minute Sorry about that. Thanks for catching that Hans. Tilley's bike were turning 8000 rpm in the '99 season, and 7200 to 7500 rpm last year. If you want all the gory details of the Tilley Bikes, get the July 2000 issue of the Weather Report from Jay over on American Thunder Bike | ||
| Ralph |
Damn Arvel, your quick. Now explain to me why they were running nitrous in it Misssing photos will now be posted one at a time.  bighairyralph |
