| Author | Message | ||
     Robr |
Does'nt squashing steam increase the compression ratio? Robr  | ||
| Jeffb |
Racinswify, Questions like this start all sorts of debates. So I might as well get it started. At the last two Buell Homecomings, Hal's dyno winners have been a 112 HP 100" 1996 S1 in 2000 and last year was 109 HP 91" 1999 X1. Both bikes have made more power on other dynos on different days, but as far as comparing a bunch of Buells on the same day on the same dyno, these are real deal numbers. I did hear that somone from CycleRama won the Buell class at the AMI dyno shootout in Daytona. That nubumber was a little higher I think. Both bikes are totally street ridden. BTW, the X1 lives in my garage. Jeff | ||
| Mikej |
"BTW, the X1 lives in my garage." I think you mean it rests in your garage, because it lives on the street.  | ||
| Kevinhern |
Has anyone heard of any problems with the Millennium Technology Nic-Sil cylinders(Nallin 1250 Kit)? Just curious because someone recently posted on ATC that some Buell Pro Thunder Techs said that they wern't durable enough for street use. This contradicts EVERYTHING I've read on Nickle-Silicon-Carbide plated cylinders. I just bought the Nallin Kit and would like some reassurance that these cylinders are as good as Millennium Technologies say they are. Kevin | ||
| Blake |
They are damn good. AAC cylinders had some trouble with tolerances, but Millenium's are reportedly first rate. Nallin Racing ran 3400 miles worth of dyno runs and drag races on a set, then out of curiosity, tore the top end down to check it out. He told me it was in such good shape that he reassembled it with no refurbishing at all. If that isn't a good data point in favor of their integrity I don't know what is. | ||
| Kevinhern |
Thanks Blake, That supports everything I've read on the Nic-Sil cylinders. However, that post over on ATC got my attention and I had to ask. Anybody else wanna share testimonials about their 1250 Millennium Technologies cylinders? | ||
| Eightyeight |
I bought a set but they must have been rubbing each other in the box they came in because when I pulled them out they were 1450's.  | ||
| Blake |
Rocketman recently inspected his AAC nickasil jugs and found them to be in great shape after 10K or more miles I think. I think he may have posted pictures to the engine topic. | ||
| Roc |
My AAC's leaked oil through the cylinder walls. This started durring break-in. AAC would not return my calls and and then their number was no longer in service. Millennium agreed to replace them at their cost, $330 I think, because they had done the coating - even though they said it was the casting that caused the leaks. It took over a month to get the replacement Millenniums and I encountered more problems than I ought to have in getting them. When I recieved them I got 3 packages - 1 cylinder and rings one day, one cylinder another day, and gaskets the next week. The new cylinders seem happy but I am a bit bummed because the two cylinders look different. One is black with polished cooling fins and it has Millennium on the base. The other is more of a dark grey/black, lighter than the other, with cooling fins that look more sanded than polished and it does not say Millennium. I'm told this is the difference between the "new" style and "old" style Millenniums. Millennium's employees all seemed very nice and willing to help me out, I think I just fell throught the cracks. | ||
| Roc |
I doubt you will have problems. Brian Nallin is as good as they come in terms of customer service and if you have any problems I'm sure he will make it right. Racinswiftly - I think there was a Nallinized S1, 74", on the board that made 117 HP. | ||
| Blake |
Racin Swifty: I heard of a Big Bore (103 inch) Buell S1 put together by Cycle-Rama that pulled 141 RWHP. Found the dyno chart and brief description in the Dyno Charts archives...  | ||
| Swon |
That post shook me a little when I saw it too. I just ordered a Nallin 1250cc Big Bore kit and Stage 3 Big Valve heads. The heads have changed from what Brian had earlier. The new Stage 3's use new tulip shaped valves that he designed. I'm going to use the SE2 cams in my 1998 S1W Black Lightning to take advantage of the increased airflow. I also just purchased the Fisher Vector 2000 engine dampner. Does anyone have any experience with this unit? Thanks, Sam | ||
| Rocketman |
Thanks Blake but I was keeping quiet because mine are a set of older AAC's. I was led to believe some of the earlier AAC's had pourosity problems due to an inferior grade of alloy used in construction. Mine are in great shape and there are some pictures somewhere, but, and there is a but, one of the cylinders had three or four tiny holes in it. Fortunately the holes are below the swept area and will cause no problems. I was further told that the Millenium cylinders are of a much better quality. Me, I love 'em, and as I've said before, my only regret is that I didn't go for a larger displacement, but hey it was 1998 !! Rocket in England | ||
| 1320 |
With the tremendous amount of thrashing that the motor takes in the Pro-Thunder racing and as many of those boys that are using the Millennium cylinders, I can't imagine any durability problems in a street ridden motor. I am having great success in a drag racing motor and I also saved 11lbs over the comparable Axtell cylinders...Less weight IS more power.. | ||
| Roc |
I spoke with a tech-support guy at Aerocharger today, Jim I think. It sounds like my turbo is working just fine and he agreed with running the fuel system cleaner through it, as it had been stored with fuel. He thought that 125RWHP was not realistic on the stock S2 engine. He did say that the engine would really like thunderstorm heads, 10-20 HP, and and intercooler, 10-15HP. After he told me these things I thought - Peter's S1 is going to fly! | ||
| Vr1203 |
Roc needs  ,I hope you'll have better luck than I, in sorting out the horses in turbos. | ||
| Vr1203 |
Would anyone like to take a guess, how much power could be lost with a 1/4" hole in the exhaust pipe leading into my turbo? I fixed it and am now waiting for a new fuel pump. | ||
| Peter |
Jim, How much? PPiA | ||
| Tripper |
Most of it.  | ||
| Vr1203 |
Pete, The thing is I don't know,  I'm waiting for my fuel pump to show up , and I'm kind of anxious to find out. | ||
| Tnhilbily |
Has anyone used the 85inch big bore cylinder/piston kit from Sputhe? | ||
| Roc |
I ran the turbo a bit harder today. Seems to go very lean, like I needed to switch to reserve, when pushed hard for any durration. I think it may be burning the fuel in the float bowl and then being starved. Could I use one of those higher volume fuel petcocks - SP? The bike uses a 240 main jet. Any ideas? | ||
| Blake |
Were you getting severe detonation? Does switching to reserve help? Tank vent working okay? Fuel filter clean? Does it fade after running hard/good at WOT for a time, or is it weak at WOT all the time? | ||
| Roc |
Blake - Here is the story. The bike was stored with fuel in it for a few years. I bought it and ran fuel system cleaner through it for about 3 tanks - this removed most of the stutter at WOT. However, I'd only gone WOT for a few seconds as it put me well into naughty speed. I went out into the country today. While at my girlfriends parents, the foot of about 25 miles of curves, I noticed a parade of sportbikes going up the hill - and a few minute later a few cops at high speed. To make a short story long I went up hill at full trot to see what was up. I ran WOT for longer than I was previouly able and after a few seconds the bike stuttered and wanted to die like it had run out of fuel. I rolled throttle off and on, used the clutch, and down shifted to keep it alive and limped to the side of the road. Although I had plent of fuel I switched to reserve, I though primary may be plugged by old crap, and went down hill. I stayed put for awhile and the bike ran fine. I got to the bottom of the hill and turned around. I charged back up and the same thing happened. This involved WOT for maybe 10-15 seconds. I thought maybe I ran the float bowl dry and the petcock did not allow for enough to resupply it in time. Ideas? | ||
| Peter |
Roc, Are you using a dual (flow and return) Pingel valve, or did they do something different with yours? It could also be a partially blocked fuel filter. PPiA | ||
| Blake |
I don't think the petcock, unless it's clogged, would be the problem. The float bowl, float, and needle valve would be a good place to look though. If the carb is gummed a bit the needle valve may not be functioning properly. Simple stuff first... Next time see if popping the filler cap alleviates the problem (listen for a sucking sound as you first loosen it). That would indicate an obstructed or pinched tank vent. If none of the above are the culprit, you might consider that with enough boost, your float bowl may actually become pressurized enough to prevent it from filling, especially if you are running an elevated boost level (over 9 lb). Try reducing boost in increments and see if that eliminates the problem. Filling the tank completely full (increase pressure feed to carb) might temporarily improve the situation. If overpressure of the float bowl vent is the problem and you want to run at elevated boost levels, you'll have to figure out some way to pressure feed the fuel to the carburetor float bowl. Good luck; let us know what you find. | ||
| Peter |
Blake, If Roc's system is the same as mine, it runs a fuel pump with a regulator to keep fuel pressure 2psi (if I remember correctly) above boost pressure. There should be a filter fitted in the line to the pump. PPiA | ||
| Rocketman |
Roc : I know Garry Forrest had similar problems with his set-up (the S1 in this months Streetfighters) and fuel pressure was the problem with it. I know not what he did to rectify it, but we messed with it at the drag strip on several occasions trying to dial it in. I think Pete is pointing you in the right direction. Rocket in England | ||
| Vr1203 |
Roc, Locate the small line coming out of your plenum going to the the fuel regulator if its smashed or damaged the regulator will not compensate for boost pressure and your fuel will be blown out the overflow. | ||
| Roc |
Thanks for the ideas. As soon as I get some fork springs form ASB the bike is to be taken apart and I will check everything. |
