Alloy head saved 16kg, forged pistons saved 90 grams each. Ok, but In a car weighing twice as much as it oughta* the torque is more useful * It oughta be a midget ;-) Lightened flywheel High performance clutch plate and cover Power approximately 200+ bhp Carburation: Triple 45DCOE Weber carburetors Cast alloy intake manifold. MGC; MG Magnette; 1100 & 1300; T-Series The flywheel was lightened and now it weighs 15 pounds. Price here in Ca. Just out www. Gene your killing me. 3kg * Total Weight saving approximately 2. Feel your MGB rev with this light weight Aluminum flywheel. " It would allow you to match revs better and easier when shifting up. Has anyone lightened their flywheel and still maintained a relative smooth idle? Jul 14, 2010 · It helps the motor be a bit less sensitive to tall gearing, and reduce clutch abuse. Just out Jan 12, 2023 · So, I sourced another flywheel/ring gear to go with my B&B clutch assembly recently acquired. 9 kg seems to be the standard weight off the flywheel. Fitment. Jul 15, 2004 · Jul 15, 2004 06:32 PM. Definitely have the flywheel lightened as much Apr 25, 2010 · A heavier flywheel makes the engine very smooth and enables it to retain energy at part throttle cruise and up long grades for better fuel economy. Nov 20, 2023 · My TC is an ex-racer. Jul 28, 2009 · I have 1968 UK C and I lightened the flywheel by 11lbs. Chromoly flywheels – 14-21 lbs. Just out A good street cam seems quite afdordable while a lightened flywheel seems quite expensive in aust at least. meaning under 4000 RPM. It has all the usual upgrades including triple webers, lightened flywheel, fast road cam, upgraded suspension etc and has been maintained by one of the ‘experts’ north of London UK. 7. Feb 7, 2010 · Posted February 10, 2010. this is all heresay though as I have not measured or done this myself. ca. Sold on an exchange basis, with good usable ring gear and clutch face. 4 x 89 mm and neither uses siamesed ports. Stock weight is 20, this one is 19 and the aluminum is 14. We all know that weight is a destroyer of performance so a lighter flywheel also makes the car Jul 25, 2008 · A lightened flywheel helps the motor rev up (and rev down) easier. Engine response is crisp with faster accel/deceleration and higher rpm capabilities without the fear of flywheel explosions when using severely lightened 70 year old iron flywheels B&G also offers a solid aluminum flywheel and B&B Aug 11, 2023 · So, I sourced another flywheel/ring gear to go with my B&B clutch assembly recently acquired. 5" competition clutch. It obviously does not make the car go faster, but it does make the engine a lot more livelier when changing gear and gives the affect of a more sportier First off the MGA/early MGB 3 syncro tranny flywheel are a totally differnet animal than the later MGB (1968-on) 4 syncro tranny flywheels. com. 979 Posts. Genuine mileage of 83k Downton motors period modifications Will actually a lightened flywheel will make the car accelerate faster, the difference is most noteable in 1st and 2nd as more improvement is seen when the overall gear ratio is greatest. Sep 19, 2019 · Use the proper grade and change every 6000 miles/10,000KM along with a new filter. . 83. As the result of fitting an MGC xmsn, there was zero free play in the throwout brng, so the entire face was skimmed 0. We just finished rebuilding an 1969 MGC engine with BW 35 transmission. Jul 24, 2008 · Re: 8V with lightened flywheel (Charlie_Foxtrot) The main difference for me was that it allowed faster upshifting, as the engine revs dropped faster when I pushed in the clutch pedal and let off the throttle. This will be a street driven 1600 engine with perhaps a mild cam that improves torque at lower rpm's. THE FLYWHEEL CAN STILL BE FITTED WITH THE STANDARD 6. Gary Jan 12, 2023 · Looking forward in anticipation to a "Grand Reassembly" of the flowed head, refreshed transmission, new flywheel/clutch, ported intake, and dress-up parts, sometime in early Spring. Carl, just a thought, I would have the flywheel balanced by itself. Has anyone lightened their flywheel and still maintained a relative smooth idle? Apr 20, 2016 · The flywheel keeps your engine spinning. When I was choosing needles for the triple carbs, I did it by comparing similar engines in this case the Triumph 2 litre - it has a similar bore and stroke ratio to the MGC (83mm x 92 mm. Sign In; Forums. It was also re-drilled for a diaphragm spring clutch cover (a Ferrari 365 GTB/4 clutch, as it Lightweight Steel Flywheel Part Number: TKC1840X Notes: Use with clutch cover GCC196. The oil conversion to spin on style makes changing a lot less messy. The end result is a healthy and willing 217bhp – a whopping 50% up on the MGC’s output from the factory. I would like to maintain a smooth idle. vs. The suspension has been very well set up with ball joint front suspension with torsion bars, modified rack and pinion, adjustable shocks absorbers front & rear and fully poly bushed. How much is reasonable to remove. I have a stock XPAG engine. With over 42 years in business, our team are here to help you rebuild, restore, and maintain your car. Jan 12, 2023 · Lightening the flywheel helps and I did have a set of rods lightened. Please contact us on 01473 730996 or e-mail info Product Code: CENG635A. Heavier the vehicle the heavier the fywheel generally. I have a B engine at a good shop. (author photo) The MGC and MGC GT lingered through the 1969 model year with few changes, but production ended in August 1969. Oct 15, 2013 · We have, starting at top, polished ports, triple su's, maniflow exhaust, "mild road cam" and lightened flywheel. If you balance both the clutch assy and the flywheel together and you need to change the clutch, both it and the flywheel will have to be balanced together again. i'm not sure but I think the stock flywheel is something like 21 lbs. 5kg more than the original. Cut it down close to 16 lbs and you'll get a real treat that includes improved fuel mileage. 5. An aluminum one is about 8. Without doing so can cause premature case, piston, rod bearing and even possible crank damage. Plan accordingly this is heavy. Warranty requests should be submitted to our sales department and must be supported by the original Moss Motors purchase invoice and documentation of the failure. Our flywheels are dynamically balanced and incorporate an integral ring gear for high rpm safety. Bob I'd been very keen for an 8" version. It has a radically (?) lightened flywheel. Engine rebuilt by Damico race engines in Norfolk UK now dynoed at 285hp. garage@sympatico. May 20, 2019 · The primary motivation at the time to have the flywheel cut, was because I was fitting an MGC gearbox, and I had to have 1/8" (. Drawbacks from light flywheels. Electrics & Ignition Single 12v battery Geared starter motor Lumenition constant energy ignition system Distributor modified for 18 degrees mechanical advance Lucas Sport Coil I have a stock XPAG engine. Shaun's beautiful alloy rear engine plate saves more but I haven't weighed to see the difference. Clutch has great holding power. 5 but the amount of machining time makes that cost prohibitive. Apr 19, 2024 · 18,067 Posts. The inertia of a flywheel is in direct proportion to the mass of the flywheel. When mated to a stiffer clutch, a lightened flywheel can improve acceleration and shifting feel. Hap Waldrop. all thoughts are appreciited. E-mail PLEASE for quote/questions/orders. Yes my MG Car Co flywheel lightening removes about 4 or 5 pounds from an original cast iron flywheel. Of course, this means faster wear of the baulk rings (synchro rings), but in racing this is a small matter as victory is all that counts. This means you can't lighten as much as you could with a conventional flywheel like a stock MGB, although there are clearly some benefits to be had. Business phone 563 323 1017. Had an interesting conversation with Ace engine modifier Vic Young last afternoon. mgexp. This makes the engine more willing to rev quicker and higher with an all round improvement in performance on a standard or fast road car. Newton's first law of motion states, "An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force" Feb 4, 2007 · Let off the gas, and it will drop revs quicker. The crankshaft and the flywheel should always be balanced separately. I've seen Kent Prather get one down to 12. Just out CNC machined in our UK based factory from forged billet steel. But I'm installing a roller cam and I'm thinking of lightening the flywheel. Flywheels for four-cylinder and small-displacement six-cylinder applications may be lighter, as weight is related to flywheel diameter. It certainly made a big difference to the liveliness of the engine, with no, or very little apparent affect on the smooth running of it. I have heard guys having good luck lightening the stock flywheel down the to 15-17 lbs range. All weights are approximate. 53" lift by Pipers. Okay, confused! From PTP's website: Performance Parts Flywheel (Ultra lightweight) - £159 (ex VAT) * Total weight 4. Regular Price: Maybe this should be on the B forum but here it is. Cross Ref. Just out Aug 13, 2023 · So, I sourced another flywheel/ring gear to go with my B&B clutch assembly recently acquired. Like. Get on the gas, and it will let the motor rev faster. kirkbrit@yahoo. Buyer will pay actual shipping cost. Custom parts are no problem, we can add a trigger wheel for an ECU, change ring gear sizes and clutch fitments to suit your build. seems that most of you that have done this range from 6 to 10 lbs off. 5” clutch. I talked to the engine builder who did it, but he couldn't find the records, but he said he only used either the Kent or Piper mild road profiles (MGB) intake exhaust timing lift rpm range Nov 29, 2018 · A very light disk with the mass in the rim, a bicycle wheel, has k=1. Matching revs for a downshift required less of a throttle blip, but a bit more precision to get it just right. If you can lighten a stock flywheel to under 15 pounds, you're good. 00. Nov 17, 2012 · Once triple SU's and manifolds along with dual headers and exhaust the engine looks totally different when pulled down. I was thinking of having 8 lbs taken off, May 14, 2007 · I think it would be great in the Subaru, it would definitely help what some people call "hanging rpm's. this is a brown and gammons steel flywheel with a weight of 5. Just out I have a dramatically lightened flywheel on my car. Regards, Robert Kirk. Mar 21, 2023 · Lovely seller offers no refund. Nov 14, 2023 · MGC flywheel. Thanks from Canada, Bob Grunau, grunau. It has a pinned ring gear and removable steel clutch facing. So the prob appears "later", several thousand miles after having fitted the aly pulley. My mechanical engineer friend preferred this way of lightening rather than milling holes around the rim (he said if this milling is not done with the correct cutter cracks can form) and the mass removed is not as great as with the method you have used. The early 3 syncro flywheels while are 1" smaller in diameter, are much thicker and do weight more than the 4 syncro tranny units to begin with. However two months ago work was done to carbs and ignition timing. Photos show how the flywheel was cut and the finish weight. I use the ceramic disc. CP had a big write up about this over on PS awhile back. Just out Is there anyone running a 1500 twin SU set up with a lightened flywheel. Bob Grunau. With Triple Weber 45DCOE carbs fitted, the engine delivered 205bhp at 4,800rpm on rolling road tests. If you ride and keep the revs up, like dune riding, then it really isn't an issue. The MGA 1600 flywheel would not bolt on to the crank so I purchased a New MGA Ring Gear and had the 5 main flywheel O/D trim down to the MGA ring gear inside diameter. Lightweight Flywheel (customer's own unit) Part Number: ENB11. 00 each. If you reduce the weight in the flywheel it will reduce the work the engine has to do allowing it to rev more freely. I'll be taking my flywheel to my machine shop soon to get some weight taken off. Feb 21, 2016 · Instead of lasting over 400k km (that was the Rover spec I believe), the crank is more likely to fail at much less than 100k km due to fatigue. This must have been recognized to be a good thing, as the lighter flywheel was subsequeltly carried over into MGB production. And a Triumph flywheel is 305mm wide, and a really lightened version can weigh 5kgs. It was in the car and working fine when we took it apart. 027" of runout and Using a lightened flywheel with a stock, non counterweighted crankshaft requires using a GB 440E Equalizer pulley to dampen harmonics, bending, torsional twist and vibration. We had at least 3 cars failing recently in our Elise community: 1 race car, 1 road car, 1 R&T car. Nov 21, 2023 · This is a race clutch for use on my high performance XPAG . There are 2 holes with bits of tube on them and 2 oversize holes on the PP to And as has been pointed out, much of the mass that would normally reside in the flywheel is carried on the crank itself (this applies to 2. Due to the long stroke characteristics of the 100 engine the flywheel can be lightened substantially with no noticeable loss of torque or detriment to smooth running. Just out So, I sourced another flywheel/ring gear to go with my B&B clutch assembly recently acquired. Not only are these lightened but they are modified to accept our heavy duty 9 1/2" organic or standard BJ8 clutch. 62#. Product Name: Lightweight Aluminum Flywheel by Fidanza. The clutch rattle I had ate it up in less than 10K. 3Kg Designed to increase throttle responsiveness and to assist in overall balance and smoothness of the engine due to been 30% lighter than standard flywheel. There are 2 holes with bits of tube on them and 2 oversize holes on the PP to So, I sourced another flywheel/ring gear to go with my B&B clutch assembly recently acquired. Just out This flywheel for a 1968 to 1980 MGB is made from 6061 T6 billet aluminum which give you the optimum strength and durability for a light alloy flywheel. Forum List; Latest Topics Table Jun 5, 2023 · So, I sourced another flywheel/ring gear to go with my B&B clutch assembly recently acquired. Forum List; Latest Topics Table Call Shaun on 07515368936 or Connor on 07877116047. Edited 2 time(s). The extra crank inertia will help hold rpms at shift points and will give more leverage on the launch (help with boggin at the line). Fits 73 to 80 Spitfire and 75 to 79 MG Midget with 7 1/4" Clutch. The holes for the PP mounting are now 3/8 UNC (Whitworth). These lightened flywheels feature a Mar 13, 2020 · Lightweight Flywheel Materials. That means removing the flywheel from the crank. 8 from 1988, and all 3. A lightened flywheel goes completely the other direction with almost no weight, letting the engine rev up very quickly and allows the engine to work easier due to the reduced weight spinning around Jul 14, 2017 · OK so at the end of day, say you could get a steel lightweight flywheel, but I still prefer, and run on my race car, and my in house engine builds, the aluminum model, because it is serviceable, the steel ones are not. It takes effort to change the flywheels speed, so drops or increases in RPM happen more slowly. MGExp. The cam was organised by PO. You drop 4 lbs off your tires, you picked up hp (and tq). I stopped in today to see how things were going and asked about the flywheel thing. The entire area outside the clutch cover was removed down to the height of the ringgear, and as much material as possible was removed from the backside, concentrating I had my flywheel lightened, actually had two done and then balanced along with a crank I have. GB 084 O'ring Flywheel, 12-volt 200mm as described previously. Stephen Strange. The more weight in your drivetrain, from the flywheel all the way to the wheels, takes horsepower (and therefore torque) to spin. The money spent on lightening a flywheel is a better performance gain per $ than a new cam, maybe even increased compression. ATI balancer weighs about 1. Jan 15, 2023 · So, I sourced another flywheel/ring gear to go with my B&B clutch assembly recently acquired. Billet aluminum flywheels – 10-18 lbs. I think for street use this is good. Cam is a 300 piper @112 0. I have done 4 this way and all have been an improvement over the stock unit imo. Why I welded the diff? because some vintage racers at my local race track have tried differents options and some of them had the best results with that configuration, so why not? I have a stock XPAG engine. I took this to the machine shop and had them resurface it and then as a secret trick I had him shave a little weight off. Substantial lightening is possible with no noticeable Jan 14, 2023 · Welch alloy flywheel saves around 11kg, probably too light but rods and crank original but balanced - crank has been wedged. £212. I have an MGC roadster set up (allegedly) for fast road use. The flywheel has been machined, drilled, tapped and dowelled to allow the fitting of the A. Has anyone lightened their flywheel and still maintained a relative smooth idle? Sep 24, 2022 · But I'm installing a roller cam and I'm thinking of lightening the flywheel. The real purpose of a lightened flywheel to permit lightening-fast gear changes while racing. Warranty. Aug 19, 2018 · Here are some photos of a C flywheel I had cut down and rebalanced about 90 days ago. MGC Performance Parts. brand new!!! MGC; MG Magnette; 1100 & 1300; T-Series & Prewar I have a stock XPAG engine. Speak To An Expert. But a lightened flywheel will have minimal mass at the rim, maximal at the hub, to minimise k and maximise strength, and will have a k of about 0. com . 4). The flywheel ring gears are heated then pressed on and secured with grade 8 button screws to insure they will stay affixed under high RPM's and heavy use. Soon, I'll pull my engine to fix the leaks and replace the clutch. Instructions & Videos. Order your MGB Flywheel & Ring Gear - 4 Cylinder ⛽ Low prices and fast, worldwide delivery British car experts ♚ Call ☎ 01522 568000 or ☎ 1-855-746-2767. Looking forward in anticipation to a "Grand Reassembly" of the flowed head, refreshed transmission, new flywheel/clutch, ported intake, and dress-up parts, sometime in early Spring. So, I sourced another flywheel/ring gear to go with my B&B clutch assembly recently acquired. 5 points. Has anyone lightened their flywheel and still maintained a relative smooth idle? Dean, That is the safe way to lighten the wheel and as you have found makes a great difference to the feel and capability of the engine. You can see the difference by checking a 79-81 XL500 vs XR500 or 85-87 XL600R vs XR600R flywheel. £452. This has lightened the flywheel by just less than half of the stock MGA. Clutch Cover Part Number: GCC196 Application: Spitfire 1500. My throwout bearing was non-existent when I pulled it apart. The branches have to be ported the extra quarter inch but according to Vic there is instant torque gains. Nov 20, 2023 · This is a race clutch for use on my high performance XPAG . ***NOTE: This flywheel can also be used on 1967 to 1972 1300cc Spitfires but must be installed using the 1974 to 1974 1500 Nov 14, 2023 · Don't have pictures, as I just rebuilt engine, (had to do a wiring harness while at it) with the most pathetic results in documenting the tear down with pics and bagging parts properly. The only downfall is there is no land on the back face of the gear and ensuring straightness was a bit www. Just out Jan 11, 2018 · Re: To lighten or not flywheel. 864-370-3000. For quicker response and improved performance, alloy flywheels are the racers choice. If you ride a lot of trails it probably won't be worth it as the bike will stall much easier while crawling along at slow speeds. Mar 19, 2021 · Among the modifications are a hot camshaft, a carefully balanced bottom end and a lightened flywheel, while the standard twin SU HS6 carburettors have been binned in favour of a trio of Weber 40DCOEs, plus a six-branch tubular manifold. So much so that the dowel holes to centralise the clutch pressure plate are gone. 5" CLUTCH WITHOUT MODIFICATION As can be seen from the photograph, the face shows no sign of wear (the engine had done fewer than 500 miles after fitting) Due to the weight So, I sourced another flywheel/ring gear to go with my B&B clutch assembly recently acquired. Had flywheel lighten, but not much compared to others, only took about 8 I know we all have hit on this subject a few times but I think I better go over it one more time. My car is a driver, but I do enjoy stepping on the gas and driving it spiritedly! I have a spare engine, with an old grungy flywheel, I was thinking I could have tha Rob Bell. Wether it is worth it or not depends on the type of riding you do. heavy flywheels could have a advantage over lightend at the track as well. Apr 20, 2019 · MGC ignition/ carb tuning. Supplied un balanced, to be done by the end user when balancing the crank line. 125" cut from the entire contact face of the flywheel to get any free-play between the throwout brng and release plate. The late production MGA MK-II used a lighter flywheel, about 20 pounds, which does give the car a more lively feel and slightly better accelleration in the lower gears. 90. Detuned a little for new cam. Standard-weight flywheels store more energy, and these flywheels are a good choice for helping to move . While looking for a new clutch I found someone selling a 7 kg flywheel with fairly new clutch set attached. Mg MGC Flywheel to buy online new, used or refurbished, we have Mg MGC Flywheels available for fast delivery from Our Network of Dealers and Breakers across the UK. Nov 19, 2023 · My TC is an ex-racer. Whatever you do, do it right. was $300 for the cutting and rebalance. These lightened flywheels feature a removable steel face with a mechanically located ring gear. AT Power throttle bodies on Weber Manifolds running off a Typhoon ECU. Has anyone lightened their flywheel and still maintained a relative smooth idle? Sep 18, 2010 · Roughly 15% of MGCs had the three-speed Borg-Warner automatic, which cost £104 (about $290) extra; most buyers preferred the four-speed with overdrive. David Billington. I think the alloy flywheel from Moss is 9lbs. Nov 9, 2023 · This is a lightened flywheel for MGB. Cost is $450. or call 01522 568000 / 1-855-746-2767. Needed to work with the my Skyhook gear box. University Motors, MG’s London distributor, bought between 150 Jan 8, 2009 · XR100 Flywheel lightened! Not sure if you all know about this place, but ProCycle - Motorcycle Parts Accessories Performance Online will lighten your flywheel for $55 shipped! They just sent back my XR100 flywheel and it looks great, turn around time was 3-4 days! Great people to work with, thought I would pass on the info to everyone! Lightened flywheel, heavy-duty clutch, uprated radiator with twin electric fans, many duel parts fitted like coils and pumps. Application: Spitfire 1500. 125". It came from a spitfire being rebuilt to race spec. Backorder. Drives really smooth. Joined 20 years ago. Acme Speed Shop. P. Painful lesson learned, worse because enough people made it clear not to do that. Just out of curiosity, I threw the flywheel and clutch parts on a scale, and was shocked to see that the whole assembly weighs north of 55# (25 Kg)! Dec 14, 2017 · Is there anyone running a 1500 twin SU set up with a lightened flywheel. # 460-675. Just out Is there a way to drill holes in an MGB flywheel to lighten it? I've heard of it being milled to lighten but was curious if I could put one on the water jet and cut a number of strategic holes to get it lighter. The early 3 mains are about 18 pounds and the 5 mains are lighter. I was happy with the results but looking at the big picture not sure it was cost effective for a street engine but still cheaper than custom rods. New race harmonic balancer , roller rockers. The pressure plate flange that the carbon bearing rides on had . Feb 13, 2015 · I'd like some thoughts on lightening an MGA flywheel. Your cast iron exhaust manifolds will be caked with a very thick (3 mm or so) layer of hard burnt carbon as well if it was like my engine when first pulled down at 16,000 miles. It sounds like the ring gear is hitting the starter, note this is a hi torque unit. Accel /decell rates are stabilized somewhat reducing certain vibration frequencies aiding comfort. Jan 5, 2017 · MGC 2" carbs etc. We took a lot of pictures except for which way the flywheel mounted to the crankshaft and where the spacer plate went. Good unmarked painted wire wheels, good chrome and tyres (4 matching) A really genuine honest MGC that’s a pleasure to drive. 1 and 3. It came from a spitfire being rebuilt to Certainly has a balanced engine and lightened flywheel etc (receipts in the file) Brand new overdrive fitted not to many miles ago. The bottom line is, he claims instant benefits to porting the USA spec intakes and coupling Jag or Rolls 2 inch SUs. Lightened flywheel. 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp), Dec 1, 2009 · Different years are different weights. Has anyone lightened their flywheel and still maintained a relative smooth idle? MG Motorsport completely stripped and rebuilt the car to the best specification including a gas-flowed, lead-free converted head with bronze valve guides, Kent AH2 camshaft and a lightened flywheel driving via an AP HD 9. Some guys have suggested I lighten the flywheel. Full Race Alloy head completed by Damico Race engines. flrgkhnamhepybneyriw