how to balance a flywheel and clutch

Rotational integrity is maximized, as well as the ability to provide a perfectly flat surface for the clutch disc to optimize wear and performance. The lighter a flywheel is, the faster it spools up RPM; but also means the harder it is to start from a standstill. But it still merits checking, and some people may be more particular (especially for a race engine). I'm sure it will be just fine it was before. Billet aluminum is suited well for the road course where you can have instant acceleration out of the corners. I think that bolt in the back of the Flywheel may hit the block anyways. A flywheelimbalance can destroy engine bearings and other driveline components if the flywheel is not balanced, and also not in its allowable tolerance. Was a 50 ounce imbalance flywheel and it's a very common upgrade to make those a 10 and 1/2 inch whenever you go to swap out the clutch. cam and bearings, frt. The flywheel should be zero balanced and the rotating assembly balanced to itself. ENGINEERED FOR BOTH STREET AND RACE APPLICATIONS. Who balanced your previous motor? Issues can still come up if the two pieces are not balanced together, creating small problems like vibrations or chatter, or even larger issues like crank bearing wear, seal wear, or worse. balancing , align-bore, tell him, you want the competition package done on her. Changing a clutch in a car is never an easy task. Add to that the flywheel and clutch when used on an externally balanced crank need to be balanced with the crank assembly which means the engine has tp come apart. Hope this helps some. Static is a good place to start but spinning the assembly is better also if you have the clutch plate centered in the assembly. All of our aluminum flywheels include a hardened steel friction surface that is designed to be replaced versus being resurfaced. 5.0Resto, SVE, LMR are registered trademarks of Latemodel Restoration Supply, Inc. Ford, SVT, Special Vehicle Team, Ford Mustang, Ford Lightning, Mach 1, Mach-E, Shelby GT500, GT350, GT350R, New Edge, Boss 302, 5.0, Cobra R, Fox Body Mustang, Ghia, Turbo GT, SVT Cobra, Cobra Jet, Bullitt, California Special, Cobra, GT, V6, S197, SN95, S550, S650, Dark Horse, F-Series, F-150, Triton, F150 Raptor, Raptor, EcoBoost, Bronco, Bronco Sport, Badlands, Big Bend, Black Diamond, Outer Banks, Wildtrak, and Sasquatch are all registered trademarks of Ford Motor Company. Were a forum community dedicated to the Chevy Z06 Corvette. An example of this would be a vehiclesdriveline set-up orthe type of clutch being used (pull versus push style). The balancing machine in the picture is supposed to have the piece being . Norton/SPEC:The flywheel is the component that contributes the mostto the performance and the overall drivability of the clutch system. THen the harmonic balancer and the flywheel need to match that. They are now taking the clutch back out to balance the flywheel and clutch together. Action Clutch specifically designed our Chromoly flywheels for a reduction in weight and inertia for better engine response. A neutral balanced flywheel or flexplate means that it isn't balanced out of balance or what is called "Detroit-balanced" like the 400SB and 454BB that are both "externally-balanced" engines. Labor costs are usually the most expensive part of any intensive job, such as changing a clutch, so its recommended to get the flywheel resurfaced every time the clutch is replaced. Another broken crank would suck!. I have been told that for an external balanced flywheel that there should be 3 large circular areas taken out further in towards the center away from the starter ring. 3 0 obj which way the piston rings go on the piston as well as how to index them on the piston? I know this sounds funny because the crank ass'y should be balanced in it's own right. YES! I built my first Cooper S engine in 73/74 and when I started it and got it running perfect it shook so bad at certian RPMs I took it apart and had it balanced and installed new rings. I trust my engine rebuilder implicitly. Replaced my Clutch (Sachs) and flywheel (Sebro) on my 88 911, and now have a vibration/chatter at low RPM's (2000 - 2500) under load/acceleration progressively worse in higher gears. (REGISTERED USERS DO NOT SEE THIS POST/AD! The bike is back together and it is very smooth. A quick image of a SPEC clutch and flywheel combination being manufactured. Every piece also needs to be indexed so that you get back in the exact place that it was balanced. As we mentioned earlier, the flywheel is a specific component which must also be matched with the correct clutch assembly for that application. Should you need information on something not found below, there will likely be a little more research to be done. Login with your E-Mail Address. This video shows how I went about balancing my LC Engineering flywheel (35 lb steel) and AISIN CTX-107 pressure plate. Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum. 4 0 obj Steel is the best friction surface for most materials because it offers a good seatability and wear pattern. When parts for the old balance machine went NLA they spent $28000. Each flywheel option the company offers is manufactured for a specific vehicle application, and different driving habits. Our Chromoly lightweight flywheels have gone through and passed engineering tests up to 15,000-18,000 RPM.All our Chromoly Flywheels are heat treated for extreme durability and saves you money by resurfacing multiple times. This s a big reason but not the only one why serious racers build niter ally balanced engines as then all that needs to be done to interchange parts like the flywheel or flexplate . I would balance them before I put them in so you don't have the same problem I'm having. He indicated that 4 cylinder cranks usually are fine and don't need balancing. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. Check out the full installation of this SPEC Clutch on our autocross C5 Corvette here. However,a lightweight flywheel isnt always ideal depending on the application. Exactly !!!!! Factory flywheel was cast iron, and six bolt pattern, and also 50 ounce imbalance. This is also why companies manufacture heavier weighted flywheels. Hovsepian/Quarter Master:Whether its a lightweightor neutral weightedflywheel, itmust be balanced no question about it. In drag racing, having too light of a flywheel will not slow the engine enough to allow for up-shifts. Early Access To Exclusive NEW Products, News, Tech & MORE! 94 04 mustang stream Check with the vehicle manufacturer for testing specifications. Colin Chapman. Were all for getting new parts, but does the flywheel really need to be resurfaced? Search Engine Optimization by vBSEO 3.6.0. #6. Any guidance would be appreciated. We'll send you the most interesting LSX Magazine articles, news, car features, and videos every week. All Fidanza Performance aluminum flywheels are made from high quality 6061 T6 billet aluminum to deliver the optimum in strength and durability and are often SFI approved for race use just like steel flywheels. I sometimes feel I'm wasting my time talking to you guys. .Bi@f|nsK_A2^xMxTL-''P EU4Y#~'iwfR?Ny?|yE]EJ^yZ?6O&_'@g The clutch plate/disc does not get balanced with the assembly. In order to prevent any issues after installing a new clutch, or later down the line, its important to get the flywheel resurfaced by a qualified mechanic. They are balanced and no metal had to come off or be added. : For registered members this ad will NOT show, Location: Palma de Mallorca, Spain, I want to register an account for free right now! On a 40+ lb flywheel / pressure plate assembly, that's good enough for the pickup truck. Cobra Make, Engine: Contemporary with 482 KC/SO, TKO600,IRS Jag/AMP, 3.54 Salisbury PL, Now that I have to order a new shortblock to replace my busted Pond sideoiler by courtesy of Eagle Cranks I have to separately balance the flywheel with the pressure plate attached, and also the harmonic balancer. Also, enthusiasts must prioritize performance and drivability. I would order a new front pulley and damper. I think that bolt in the back of the Flywheel may hit the block anyways. You may want to go ahead and step up to billet steel. Any imbalance will be felt , like a road wheel out of balance. :0). Flywheel Runout. Welcome to Club Cobra! In our hay day we got 17 sets of V8 heads out each day. All of our flywheels are SFI Certified which meet the top performance standards in the automotive and motorsports industries. We know all too well how difficult and confusing it can be to match a flywheel with the appropriate clutch. dogdo yourself fav. I have a vibration that starts a little over 2000 RPM and seems to fade way above 3000 RPM. Our aluminum flywheels are made from 6061-T6 Billet Aluminum or 1045 / 4140 Billet Steel depending on application. i know you don't with that done and you somehow manage to assemble the rest correctly..you will be able to beat the liven crap out of her for a long time. As for the clutch disc don't bother with it as it is light and stops in a different place each time. Everything is lubricated (bearings, etc.) If the flywheel and clutch assembly are out of balance, noise, vibration, and harshness levels will dramatically increase,and will inevitably cause extreme damage to the engine, transmission, or driveline. At one time or another, most of us have had to replace our clutch assembly in our vehicles; and we all know what a giant pain that can be. The style of driving or racing will usually determine the need for a specific style clutch, which will strictly translate to the type of flywheel necessary as well. Colin Mc Rae MBE 1968-2007.Give a car more power and it goes faster on the straights,make a car lighter and it's faster everywhere. The ability of the flywheel to control heat and maintain tolerance can also prolong clutch performance and wear under extreme conditions. They are specifically made for light to high tuned racing cars that see drag racing, drifting, autocross, street use, and rally events. 1 0 obj Most lightweight flywheels can be used in both street cars and race applications. Another broken crank would suck!! Saleen is a registered trademark of Saleen Incorporated. Do it right once or continue payingits an easy choice really!! To balance it, you would drill holes, not weld or bolt anything to the flywheel. Do I need to get the flywheel balanced together with a new clutch disk & Pressure plate? After rearranging the parts (moved the clutch housing and spring plate marks closer together to offset the flywheel) it hung level. Have you tried to spin it with the presure plate moved around one hole at a time untill you find the best spot first? "the disc can land anywhere" - I shoulda thought of that! I had a really bad vibration. FW Clutch have rebuilt a number of NLA clutches for vintage cars we've worked on. Never built another without balance. Was a 50 ounce imbalance flywheel and it's a very common upgrade to make those a 10 and 1/2 inch whenever you go to swap out the clutch. Here a copy of a post that I did a few months back. In most cases, a ring gear can be replaced after starter damage or failure, without the end user having to purchase a completely new unit. Hovsepian/Quarter Master:It is possible to resurface a flywheel in most cases. Clutch diameter: 10.400" Starter ring gear teeth: 153; Lightweight nodular iron . It is a small block LA Motor with a mild camshaft backed up by a 833 4 speed trans. Now comes the next question, what materials do you want to use with what? Oct 27, 2007. let them pistons reach for the stars. MSC offers new as well as several other suppliers. As received, a new flywheel from the factory should be balanced within some industry standard, like a few grams or a few ounce-inches. Our goal for this question-and-answer session is to discuss many frequently asked questions regarding the flywheel, and to help enthusiasts gain a better understanding of the science behind them. When you get into the realm of replacement flywheels, you do have a few options and it can be a little confusing. 3912 Whittier BlvdLos Angeles, CA 90023(323) 269-6051. If you put a 28 oz flywheel, one that has a 28 oz weight tacked on somewhere on the outer circumference of the flywheel , the motor will vibrate like mad, eventually breaking something. Some drag racers prefer the additional weight to aid in launching off the line. Once you've indexed the pressure plate you can drill some holes in the casing to remove metal. It should also be checked Posts: 7,924. As it pertains to machining and manufacturing tolerance, parallelism and concentricity are the important measurement standards. This route gives you an almost infinite lifespan for the flywheel, allowing it to be rebuilt multiple times without changing the dimensional features required for correct clutch operation.