| Author | Message | ||
     Sarodude |
Projects like this CAN be done in many different ways. There just aren't many GOOD ways that take all things into consideration. It's kinda like S&S carbs. Sure, they're cool WOT over a narrow rev range..... -Saro | ||
| Naustin |
OK, so you hit 9psi at the top of 1st gear at 15-20mph, and the rest of the time, your super-charger is spinning faster and faster and faster, using up more and more horsepower, while still only putting out 9psi?. Isn't the parasitic loss to the supercharger by the time you get to top gear going to almost completely offset the added horsepower? I mean, I can see spinning 12psi at redline, with the wastegate set at 9 so that you get a little more boost sooner in the rpm range, but if you get to your max in the first 30% of the RPM band, you'd be wasting power by spinning the blower overly fast the rest of the time. And I thought the waste-gate was also tied into the throttle so that when you are running wide open, it is giving you full boost, but when you let off the gas, it drops the boost so you don't lean out and overheat? Or maybe that's the blow-off valve. | ||
| Ezblast |
I don't see it using more hp - the % loss would be constant - more or less - engaging/disengaging extra loss? - I see it working even on decel due to the low psi set number vs. the high psi it would spin up to. GT - JBOTDS! EZ  | ||
| Bobbyhead |
A supercharger is essentially a large pump that compresses air and forces it into the engine's air intake. Turbochargers do the same thing, only they are run by exiting exhaust gasses, while superchargers are powered by the engine's spinning crankshaft, normally via the accessory belt. Originally built for World War II aircraft, superchargers have become very common in today's performance automotive world, and featured as original equipment on some new sports cars straight from the factory! Superchargers have become popular in recent years for several reasons, including cost efficiency, reliability, and of course, performance. Supercharging an engine often results in huge power increases in the range of 50% to 100%, making them great for racing, hauling heavy loads, or just having fun in your daily driver. Although superchargers carry a fairly high ticket price when compared to other single performance upgrades ($1500 - $4000), nothing provides more horsepower for your dollar... in fact, nothing even comes close. And because of the way superchargers work, they provide power only when the engine is under full throttle or under load... not under normal cruising conditions. This means that the supercharger will not affect the engine's reliability, longevity, or fuel economy under normal driving conditions. Most of the superchargers sold today are centrifugal-style superchargers, which are internal-compression superchargers, meaning they create the boost (compress the air) inside the supercharger head unit (blower) before discharging it into the engine's air intake. External compression superchargers (roots or screw-type superchargers - Whipple, Kenne Bell, Jackson Racing, Eaton) have become less popular as centrifugal superchargers have evolved. Centrifugal superchargers (Vortech, Paxton, Powerdyne, ATI ProCharger) are more reliable, especially at higher boost levels, and are capable of creating much more boost than external compression superchargers, while creating a much cooler intake charge (which results in an even denser intake charge). Boost is created at the point when the supercharger's internal impeller pushes enough air through the blower to overcome the vaccuum force naturally created by the engine's air intake, so air is being forced, rather than pulled, into the air intake. Boost is measured in pounds per square inch, or psi. More boost equates to a more dense air charge into the engine's combustion chamber, which allows the engine to burn more air and fuel and create more horsepower. Most street superchargers produce somewhere in the range of 6 to 9 psi, meaning they produce 6 to 9 additional pounds of pressure over the atmospheric pressure at that elevation (at sea level atmospheric pressure is 14.7 psi). Many people assume that running a supercharger, and hence added intake boost, puts added strain on an engine's engine parts. This is not necessarily true, because engine damage is almost always caused by RPM. Because a supercharger helps the engine produce more power at lower RPM, supercharged engines will make the same horsepower as their naturally aspirated counterparts at substantially lower engine RPM, where today's street engine's are designed to run (around 6000 RPM). Another concern some people have towards using a supercharger is that they think it will increase the engine's compression to the point that it will cause detonation inside the combusion chamber. Detonation exists when the combustion pressure is raised so high that the inlet charge ignites itself before the spark plug fires. When this happens, combustion takes place while the piston is still travelling up in the cylinder bore, which puts tremendous loads on the piston, rod, and crank. While it is true that a supercharged engine creates boost and increases the engine's compression, most supercharger kits include a boost timing retard chip that retards the engine's ignition timing under certain conditions to prevent detonation. With some kits, detonation is not a concern, in which case the kit will not include a boost timing retard chip. Supercharger impellers on centrifugal superchargers are spun via an external pulley that is normally driven from the engine's accessory belt. Because the supercharger pulley needs to spin at very high RPM, an internal step-up causes the impeller to run at substantially higher speeds than the input pulley. Because the speed that the impeller spins determines how much boost is produced by the supercharger, changing the input pulley size can have a large effect on the amount of boost put out by the supercharger. Smaller pulleys produce more boost, which is why they have become so popular for supercharger owners who are looking to squeeze every last bit of power from the engine. And because they only cost around $70, they are an inexpensive way to test and tune your supercharger at different boost levels. Because superchargers spin at such high speeds, they often create a substantial amount of heat, and require lubrication to keep friction to a minimum. Different supercharger companies have combatted the problems of heat and friction in different ways. While no single method is the best, each method has advantages and disadvanages. Powerdyne uses an internal belt to spin the internal gears (step-up drive), which minimizes heat, is very quiet, and lasts for over 50,000 miles. This internal belt never slips, and does not require you to tap into your engine's oil supply for lubrication purposes, making it the easiest line of superchargers to install. Vortech, Paxton, and ATI (except ATI's self-contained systems) all use the engine's oil to lubricate the step-up gears and keep heat and friction to a minimum. While this lubrication is the most common and works well, it does require the engine's oil pan to be tapped so the supercharger can draw engine oil from the engine. ATI's self-contained systems also use an oil to provide lubrication and to minimize heat, but they use a proprietary oil that stays inside the supercharger head unit and never requires changing. This system is efficient and does not require the engine's oil pan to be tapped, but is substantially noisier than Powerdyne's belt drive system. taken from- http://www.superchargersonline.com/content.asp?id=15 | ||
| Ezblast |
Set it for 8psi - they can spin up further, wastegate takes care of that, so at most points you would be running the 8, then the carb handles it fine, however, at those times when it isn't at 8 - problems? Can a carb be sucessfully used/tuned or would FI be easier to tune? GT - JBOTDS! EZ | ||
| 17blast |
Draw threw carbs have problems of there own. When the fuel enters the compressor it is heated which lowers efficiency. Blow threw carbs have to be air tight. EFI is the best but cost the most. Most super charger systems don't use waste gates or pop off vales. Not to say you couldn't use them but they do add more peaces to the puzzle. | ||
| 17blast |
On second thought there are no waste gates in super charger system only turbos. A waste gate releases exhaust gasses to keep the turbo from over spooling or creating to much boost. Pop off valves release excess boost also but can only be installed before a carb or injector, otherwise fuel would be discharge with the excess boost. | ||
| Gearheaderiko |
Wow. Thats a whole lot of information that most of us will never need! Realistically all the info about boost,etc., is useless you understand the basics. Its not that complicated unless your actually going to do it. But interesting none the less. | ||
| Rjharless |
I currently am running the MT-75 on my 2000 Blast. I am going through rear tires every 1500 miles. I enjoy railing in the mountains, but I do have 1/4" chicken strips. My question is, are there any rear tires that will work with my front pirelli, give me fair performance, and a little more wear? I know I am asking alot, but any thoughts will be greatly appreciated. | ||
| Ezblast |
Avon | ||
| Jprovo |
I concur - Avon AM52. They are a good tire. You also might try to adjust your tire pressure to 33-35 psi. I weigh 185 and regularly get 6000 out of an Avon. Oh year - There's also a tire section in the knowledge vault that has many more peoples opinions... http://www.badweatherbikers.com/buell/messages/20164/20273.html?1131720157 James | ||
| 17blast |
R 1 forks " Done "   | ||
| Ezblast |
So what did you have to do to make those fit? GT - JBOTDS! EZ | ||
| 17blast |
Have this stem made. It uses the stock bearings  | ||
| Rjharless |
Thanks. I think I will try me a Avon on the rear. I will try to post a pic of my Blast soon. It is starting to look alot different than when I first got it. | ||
| 17blast |
Here's whats next.   | ||
| Ezblast |
Sweet! Going to a chain? GT - JBOTDS! EZ | ||
| 17blast |
Yes, 520 The smallest front I could fiend was an 18, witch requires a 57 rear to maintain the stock ratio. | ||
| Ezblast |
What rear tire combo you using? GT - JBOTDS! EZ | ||
| Naustin |
Cool!  | ||
| Gearheaderiko |
Sorry, but whats an R1? Nice job on the rear swingarm fabrication. | ||
| Naustin |
That's a liter class Yamaha SuperSport - top rung, I'm pretty sure.... | ||
| Saltyblaster |
Hi 17Blast. I'm curious, did you fabricate the swingarm adjuster or purchase it? Very neat install! Thanks job! | ||
| Ezblast |
Looks like the one you buy for the tubers - forget which one but a search would turn it up - under swing arm adjusters, a little sanding/milling to fit - Correct me if I'm wrong - nice job! GT - JBOTDS! EZ | ||
| Ezblast |
Have six rooms reserved for Cali Blastards and/or folks that also wish to do the Cali SLO ride. Travel Lodge - 1825 Monterey St., (805)543-5110) 78.50 satThere are a lot of Blastards here in Cali and yet very few of us have met one another in person. Here is your opportunity to get a good set of rides in, meet the folk/friends you have been conversing with over the net and share riding stories, and enjoy the sharing of a passion we all have in common - Buell. Last years ride was a lot of fun and the roads and folk where awesome! Truely an adventure you'll remember! The twisties are calling your name - can you think of more fun filled reply?! Heres your chance to compare notes and make friends, and this is California after all - a place known for great roads - our mission is to find them! Bring your ride, make some friends and enjoy a great time! San Louis Obispo is the meeting point - join us - the origionals plus already! So join in some fun and create some memories to recall. Let the ride To SLO Part Tre' Begin! (again the ride will be April 1,2, & 3!) Disclaimer: This ride is in no way associated with Buell, the BADWEB, or any of its organizers. This is a voluntary gathering of fans of the Buell Blast. No one is leagally responsible for another on this ride or gathering - we all agree that we are responsible adults in charge of our own behavior, and that a safe and sober ride is our own responsibility and expected of us. Housing, feeding, and personal care is each our own responsibility. Showing up for this voluntary event will be a sign of accord of the above statement and will be taken as acceptance of such. That said: Please make sure your bike is in good working order, that you are in good working order, and that you are prepared for any contingencies that may occur (a cell phone and Brag Roadside Assistance Membership would be a great idea, any tools you feel you'll need, etc.). I will reserve a small block of rooms (8 rooms are reserved at the Travel Lodge - 1825 Monterey St., (805)543-5110), however, such rooms will be shared (unless you bring your significant other - that counts as sharing - ;0)) and any other lodging arrangements will be your own responsibility - so if you want your own room - you'll need to arrange such. The Idea and goal of this event is to meet and share a little time together having fun and enjoying a ride! Each of us may participate as much or little as they please, however, thanks to those participating so far it looks to be a promising start to a fun event! Hope to see you there and remember - ride your own ride! 63.10 sun 401704pbx6 If more rooms are needed - I'll know by how people shout out here and let me know whose comming! For more info: http://www.badweatherbikers.com/buell/messages/20164/43413.html?1135360158 How about it folks - whose comming to this most excellent ride? GT - JBOTDS! EZ | ||
| Ezblast |
The Northern group will meet in front of the Beanery Coffee Shop - 9th Ave and Irving in SF at 9AM - sat. the 1st of April! GT - JBOTDS! EZ | ||
| 17blast |
Saltyblaster - The adjusters are of my own design. I was trying to come up with something easy to machine. As soon as I get my scanner running I will share the sketches.   | ||
| Ezblast |
Sweet! Your a machinest? GT v- JBOTDS! EZ | ||
| 17blast |
Well I was, now I turn wrenches but I have a friend in the machine shop were I work. | ||
| Ezblast |
Doing setup and testing eh? - cool! Well - Welcome to the madness! GT - JBOTDS! EZ |
