S&S Cycle 509 Camshaft Kit For Harley Twin Cam. **551 cams are not recommended with compression ratio of 10:1 or higher.NOTE: Stock valve springs in 1999-’04 big twin models can handle cams with valve lifts as high as .515".". There are plenty of defects in the Twin Cam engines. Beginning in 1999, the Harley-Davidson Twin Cam motor made its debut on rubber-mounted bikes-the "Glides," being the Super, Electra, and Road. I think I have 3 basic options: Simply replace tensioners with stock; 2. 9.5:1 pistons when combined with a Cometic .030 head gasket put you right at the ideal range of 190 psi. Big bore conversion kit 88ci to 95ci for Harley Davidson Twin Cam 88 2000 – 2006, includes 9.3:1 compression cast pistons and black wrinkle finish cylinders. Discussion in 'Touring Models' started by ickysticky74, Mar 21, 2012. But I want to have some work done on the bike for other stuff and figured it might not be a bad idea to upgrade the tensioners and possibly cams. Bolt on kit ready to install and run. I ride 2 up majority of the time and mostly highway. The three questions to answer before choosing a new cam for your Harley Davidson® motorcycle are: 1. Not looking to do any other mods in the near future . Primary application: Is the bike going to be used for all around street riding or is the goal to have an engine which is running at the maximum torque … The 100" Power Package is the ideal combination of performance and savings to transform your Twin Cam HD without breaking the bank. Harley Davidson Forums. Bump the early Twin Cam from 88ci to 100ci as well as adding matched cams/cam plate/oil pump and everything else a high performance cam chest needs to reliably make big power. I have a 2006 Fatboy with about 34k miles on it. Log in or Sign up. 9.3:1 compression 95 cubic inch Bolt-on big bore kit for Harley Davidson Twin Cam 88 models The new design is very reliable and as of like 2009 I haven't heard of any problems with them. Stock valve springs in 2005-up … Harley, of course, made a fairly expensive upgrade including a new oil pump and hydraulic cam chain tensioners run by the engine oil and re-designed shoes. The choices are s&s 509,Andrews 21 or the screaming eagles 203 or 204. Once again, we know how much you adore the Twin Cam engine Harley Davidson motorcycles. Note: Although several cam grinds were used in stock engines from 1999-’06, the timing specs of the 475G cams is most similar to cams used in 1999-’03 EFI engines. The following year, a counterbalanced Twin Cam engine found its way into the solid-mount Softail line. Forums > Harley Davidson Motorcycles > Touring Models > Best Cams for a 88 engine. What CAM upgrade would you guys recommend to get more horse power and torque? Harley Davidson Twin Cam Engine Problems. Twin Cam 88, 95, 96, 103 and 110 CID engines Horsepower Gallery : Performance and Technical information on engines for Harley-Davidson motorcycles. However, you still need to know and be aware of what exactly are you buying so there would be no surprise expenses once you start driving the motorcycle. S&S has been in the business of making Harley-Davidson motorcycles go fast for a very long time, and their innovation in the world of bumpsticks is not exactly a secret. Had the cam tensioners checked about 5k miles ago and all looked good. At about 195 psi cranking pressure Harley engines start to dentonate. I am trying to decide which cam on my 2004 tc 88ci softail. They also went to a new style chain. I wold say about 80 % highway. Harley-Davidson. I think that 10.25:1 pistons are actually too much for this cam. This is a list of verified horsepower figures for a variety of the Twin Cam 88 and 95 CID Engines. You have to take into consideration corrected compression ratios with cam selections. Are actually too much for this Cam year, a counterbalanced Twin Cam engine found its way the. 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