Seventyfour, 80, 88, 96, 103 the quest for more power from our vtwins has brought us a curious set of iconic numbers that might appear meaningless to most of the population but to vtwin enthusiasts, they are important and this quest for more pulls us steadily up the ladder to bigger displacement. Liquidcooled engines are mostly used to reduce heat and improve performance. He also shows us where to grab power for our electronic accessories. Twin cam 96 engineequipped model from 96 cubic inches 1584cc to 103 cubic inches 1690cc. All i can do it search out the people that i believe know better than me.
Brisk performance spark plug harleydavidson softail breakout br14ys9. Brembo calipers, abs, cableless throttle and a new frame are just a few upgrades from the twin cam 88. Average life of a twin cam 96 harley davidson forums. After i read it, i sent him an email concerning a cure for my red hot engine. I have been using mobil 1 v twin in my 2004 88 twincam since the 0 mile mark and i am happy with it. We have included information on the 40 evolution engine, twin cam 88, twin cam 95, shovelhead 74, shovelhead 80, sportster evolution, sportster ironhead, sportster xr, and buell. Harleydavidson twin cam vtwin motorcycles history of. Twin cam 96 harley davidson engine harley davidson forums. Our entrylevel performance head is for the customer who is looking for an increase in horsepower and torque while working with existing stock components. Boost the performance of your harleydavidsons twin cam engine with 101 projects broken out by each specific aspect of the motorcycle, including engine, suspension, transmission, exhaust, brakes, and body. Toph bocchiaro, photography by toph bocchiaro april 9, 2009.
If you need increased torque to launch a heavy bike off the line, or high horsepower to improve trap speed with a lightweight bike, screamin eagle cams are available in a wide. Bob walks us through many of the upgrades that we see on the twin cam 96 and 103. The twin cam 96 engine was redesigned to include 700 new parts when it first appeared in 2007. Although these engines differed significantly from the evolution engine, which in turn was derived from the series of single camshaft, overhead valve motors that were first released in 1936, they share a number of characteristics with nearly all previous harleydavidson engines. They made changes to the crankshaft, connecting rods, crankcase, transmission case, and all transmission parts. Comparable to screamin eagle se211251257 and andrews 31h32h55h67h cams. Screamin eagle performance parts harleydavidson usa. Fits 1617 softail except flss, flstfbs and fxse and 1016 touring models except 1416 models with twincooled engines equipped with a twin cam 103 engine. We talked on the phone a year ago about installing a tw222 camshaft in my hd 2016 ultra. The number of 2007 performance engines is increasing. Twin cam 88, 95, 96, 103 and 110 cid engines horsepower gallery. Performance and technical information on stage 3 modifications to a harleydavidson tc95 motorcycle engine. We are only listing a few boltin cams right now that meet the performance needs for all but the most radical of engine builds.
Ngk iridium ix dcpr7eix spark plugs for 19992016 harley davidson twin cam pair the ngk plugs are made from a fine wire center electrode that comes with a copper core and an iridium alloy tip. Includes big bore cylinders, big bore flat top piston assemblies and a stage i air cleaner kit with onepiece back plate, integral breathers, all mounting hardware and gaskets. You can get the same or better advice and ideas on the many online hd or vtwin forums. The stroker motor adds additional lowend grunt and similar to the earlier twin cams, responds very well to performance upgrades. Information provided in the v twin motorcycle performance guide covers engines made by harleydavidson and its clones. Harley heads, big twin, big twins, performance, perfomance parts, parts, high perfomance, harley parts, harley davidson parts, valves, sreaming eagle, screamin eagle. Out of the box the twin cam 96 provides a power improvement over its 88inch predecessor. The twin cam 96ci produces 1,584 cubic centimeters, or 96 cubic inches, of piston displacement. Performance and technical information on stage 3 modifications to a harley davidson tc95 motorcycle engine.
Heres a look at the technical elements and developments that allowed the. Articles in this book provide good common performance ideas but it. This head will accept up to a 625 lift cam and top dead center tdc lifts of. This package delivers awesome acceleration and an incredible amount of torque throughout the entire rpm range. Recommended upgrades for 20072008 hd twin cam engine. Boost the performance of your harleydavidsons twin cam engine with 101 projects broken out b more. The twin cam, 1584cc engine will give you more torque, but lacks in horsepower. If youre looking for an engine with more horsepower, try the vrod, 1200cc engine.
Big boyz head porting twin cam camshaft comparator. Bolt in power to upgrade twin cam 96 or 103 inchers to fire breathing 107 cubic inchers with no head work or other parts required. Shop screamin eagle performance parts at the official harleydavidson online store. The vrod has better air flow, 4 valves, and dual cams, which allow the engine to spin faster. Jul 08, 2011 deciding which kind of power you want is the first step in increasing harley performance. And of course the job winds up with a power commander and a custom dyno tune, a performance map written specifically for this engine. Performance and technical information on engines for harleydavidson motorcycles. Graphic proof that an exhaust system can make or break a performance package.
The ultimate video on increasing horse power for your harley davidson porting heads contact. Discussion in engine, fuel and exhaust started by goat c. Harleydavidson twin cam vtwin motorcycles history of the. Harleydavidson screamin eagle twin cam performance cams se255 2563807 5 out of 5 stars 4 product ratings 4 product ratings harleydavidson screamin eagle twin cam performance cams se255 2563807. You can get the same or better advice and ideas on the many online hd or v twin forums. The harley davidson twin cam 96 is an aircooled, pushrod operated, 45 degree engine with two cylinders in a v twin configuration that first appeared on dyna, touring, and softail motorcycles in 2007. Massive horsepower and torque increases from 3000 rpm right to redline. Get the best deals on complete engines for harleydavidson when you shop the largest online. That is why i read donny petersens book on the twin cam.
But still recommends staying with fairly conservative upgrades. The engine was released in 2007 and, according to harleydavidson, the twin cam system provides cleaner burning and improved engine performance. Helpful ideas for increasing your harleys performance. Screamin eagle twin cam stage iv kit 103ci to 103ci. Speed spotlight the 106 package for harleydavidson twin.
Thats why the harleydavidson howto books all have a photo of someone pointing. Race shop components for the heart of your beast from the brand that is racing. I also dont feel comfortable with 5000 mile ocis in an air cooled engine so i do 2500 miles with a filter change every 5000. Bore kit for 2007up 96 engines are an easy and cost effective way to do it. Twin cam engine kits high performance for your harley twin. If youre looking for ways to keep up with the pack or blow right past them this book has 101 of them. Stock 96inch engines average 62 or 63 hp, maybe 68 from an originalspec 103. As you noted, harleydavidson makes two different versions of its big twin engine. Fits 49state 1011 touring models equipped with a twin cam 96 engine with separate purchase of screamin eagle 378 big bore cylinder kit. A high performance twin cam model was added for 1958. The harleydavidson twincam vtwin was introduced in 1998. Sep 29, 2015 a frank discussion of the inherent flaws with the harley twin cam engine, produced since 1999 to the present. This head is compatible with the flat top 103 and new flat top 110 piston kits from harleydavidson but is recommended for use with the tman performance 107 kits.
The nickel electrodes have an extremely high melting point and come with. The twin cam 96 engine replaced the twin cam 88, which was produced between 1999 and 2006. This new book from wolfgang publications shows the how and why of performance engine building with over 500 color photos. Even more than the evo before it, emissionscontrolled devices aim to restrict the amount of air that goes into and out of. The harleydavidson twin cam are motorcycle engines made by harleydavidson from 1998 to 2016. The twin cam 96 redesign resulted in an engine that produced 17. Each chapter covers a specific subassembly of the twin cam motor.
If you have a new bike and are considering high performance modifications, the. Red shift cams 527 cams for 20072017 twin cam engines. Complete engines for harleydavidson electra glide for. Keep headlights in your mirrors and taillights out of your face with a simple twist of the throttle. Apr 30, 2012 the ultimate video on increasing horse power for your harley davidson porting heads contact. Purpose this is the perfect package for the performance enthusiast on a budget that is just looking to improve the torque output, smoothness, and longevity of the motor. The tc96 twin cam 96 cubic inches engine is used in all hd dyna and touring models. The real twin cam boss for 96 thru 124 ci minimum 10. Our most popular twin cam performance package, bar none. This is a list of verified horsepower figures for a variety of the twin cam 88 and 95 cid engines. Perfectly compliments many of the boltin torque cams available. There may have also been some sort of deal made with the aftermarket. The twin cam patented the engine to transmission mount as well as some other features.
Includes all twin cam engines, from the twin cam 88, 96, 96b, 103 and 110 cvos. Every cam has unique lift and overlap performance characteristics, which means you need to select cams based on exactly the kind of power youre looking for. Twin cam head porting packages at hd street performance head. Hightorque design developed as a boltin cam for 96 to 110. All that is required is boring your stock cylinders, reassemble, tune and go. A frank discussion of the inherent flaws with the harley twin cam engine, produced since 1999 to the present. Contrast that with whats on hand after that 106 kit joins the party. One of the things he said was that all 96 twinkys should have an oil cooler. This engine was the successor to the harley davidson evolution engine and at present is used to power dyna and touring models. We offer motorcycle parts, motorcycle accessories, motorcycle service complete including dynotuning, atvs, trikes, and utvs, as well as pit bikes.