Thursday, January 11, 2007
Hello everyone, Guy Caputo here. I know that some of you are probably scratching your heads and saying, “Guy who??” I have been away from the writing end of things for Dragbike.com for a couple of years and have been concentrating my efforts on building and racing in the Land Speed
arena at Maxton, N.C.
With the help of my cousin as builder & tuner, Mike Caputo at Maximum Performance Cycles in Toledo, Ohio, we built a Land Speed Nitrous Hayabusa named the “Tiger” that has held the title of the “Worlds Fastest Nitrous Motorcycle” for 2005 & 2006.
During this time I have been bombarded with questions as to what we did and how we accomplished such a feat, well let me assure you that it was no easy task. The “Tiger” was the combined efforts of Tiger Racing and Maximum Performance Cycles and its sole purpose was to do exactly what it accomplished and that was to be the fastest nitrous oxide injected bike on the planet. The record as it stands right now is recorded at 228.803 mph and still stands as of the writing of this chapter.
To make a long story short, the “Tiger” was recently sold to the Motorcycle Product Manager of one of my sponsors JE Pistons, Mr. “Speed King”
himself, John Noonan.
John recently rode the “Tiger” at Maxton and broke another Land Speed Record and became a member of the ECTA 200MPH Club at Maxton. John now becomes one of only 2 other people to belong to 4 different 200MPH clubs in the world. Since the original “Tiger” is no longer in my possession, I have been having pains of loss and sorrow. So it was time to build another “Tiger”, the “Tiger II”. This time, with the knowledge we learned from our last efforts, some significant changes will be made with the hope of going over 240mph on Nitrous Oxide. This lofty goal is going to require that we change our paradigm of how we think about Nitrous Oxide and how it should be used. Change the N2O injection process as it relates to the co inhabitance with the aspirated motor. In other words, what am I going to do different today than I did yesterday to go faster using the same ingredients for speed? Well that’s what this novella or book is going to try to accomplish and answer for you. When you have read all the chapters and completed the online exam, the next time some one asks you this question, how do you build the “Worlds Fastest Nitrous Motorcycle”? You’ll know. We will explore every aspect of the building of a monster big bore nitrous motor and when that’s complete, we will show you how to add all the goodies necessary to make that motor give us every last bit of horsepower it can possibly deliver. We will do this chapter by chapter and in exacting detail. No secrets will be kept from you (unless you fail to have super secret krypto clearance) and we will provide as many pictures as we have room for in each chapter.
Building a Busa Motor from the ground up is probably where we should begin and there’s no better place to start than at the foundation of a motor. First we start with a set of empty Hayabusa motor cases.
Then we send them to the “Worlds Fastest Aspirated Motorcycle” rider @ 222.123mph, Mr. Rick Stetson of Harry’s Machined Parts. If you’ve never heard the name Rick Stetson then you were captured by aliens and during the mind probe you never remember having been to a Prostar, NMRA or NHRA
drag race event.
Rick was the mastermind and crew chief behind the Worlds Quickest Funnybike at 6.451 E.T. @ 219MPH. Rick is also the machine shop used by the “Worlds Fastest Aspirated Motorcycle” builder, Mr. Dave Owens. Dave by the way builds some of the biggest and meanest big bore motorcycles on the planet and he rides them
on the street daily.
When the cases were returned to us here at the Tiger Racing R&D development center (my garage), they had been cleaned better than new and had some magical mysterious machine shop wizardry performed on them by Rick. Rick hones the main crankshaft journals in order to get them perfectly straight to within .0001” of an inch. That’s 1 tenth of a thousandth of an inch. Now that’s perfection.
The next important item on the list, Rick installs Heavy Duty Studs to keep the cases from moving under those High HP loads, there is nothing more important than keeping your cases from shifting once assembled.
Rick then closes some oil passages, and re-jets the piston oil spray jets. Without giving up all his secrets for his magic, suffice it to say, if you don’t start with a set of cases capable of lubricating and holding over 400HP on Nitrous, then this whole project is doomed before we even get started. Let me repeat myself, if you’re going to build a custom big bore, high HP motor, then you must have a set of motor cases capable of properly lubricating and holding that kind of HP!
Need I say more?
Rick’s main concern is to lubricate the rod journals more efficiently which is why he says that you must have at least .002” of an inch clearance in the Rod Bearings and .001” of an inch clearance in the Main Bearings. You have to keep the oil in the crank bearings and move the oil in the rod bearings. He shuts off the oil passage to the balancer shaft (which we will not be using) and removes the oil flow restrictor. Oil flow is the most important aspect of a race motor and can not be compromised. If your motor builder is not doing these important things to your Big Bore, Big Nitrous or Big Turbo motor, then you could be taking chances on your motors survival when running the Big HP.
Rick knows what he’s talking about because not only does he have 3 NMRA Pro-Comp National Championships behind him, but 3 NHRA Pro-Stock Wally’s from the NHRA and last but certainly not least, 4 Funnybike National Championships at AMA/Prostar as Crew Chief for Clark Racing. His credentials are beyond reproach and I for one am ecstatic about having him as part of my racing program. Thanks Rick.
In the next chapter, we will install into my pristine, magically built and modified motor cases, the heart of the motor, the Crankshaft. I bought a brand new crankshaft from Suzuki Motors and I have sent it to one of the premier crankshaft artist in the business, “Jay” at APE.
Special Thanks to:
Harry’s Machined Parts – Rick Stetson 508-366-1455