Like choosing a cam in general, the key to eliminating separation anxiety is to find the proper balance of driveability and performance. The Wastegate works by releasing the pressure built inside, Read More What Are The Wastegate Stuck Open Symptoms?Continue, Oops! lobe centers and lobe separation are 2 different things . Kevko baffled oil pan & Milidon windage tray. = Moderately Wide 110-108 Deg. See all 14 photos 13 The three power curves indicate that the wide (120-degree). And better gas mileage. 106 LSA: The overlapping is higher as 106 LSA is comparatively tighter LSA than 110 LSA. I have seen a dyno test where an engine using identical duration and lift made more peak power with a 112 LSA than a 110 LSA. But, after comparing these two LSA based on a few mechanical aspects, such as maximum Torque, RPM, powerband, oil consumption, and many more, you will find the 106 LSA with better performance output. Say you have a cam ground on a 115 and the other on a 110. TH400 Vs Powerglide: Which One is Ideal for You? On a torque graph it tends to resemble a triangular shape.. Maybe even 114. but less of it at the same time. Generally speaking, decreasing the lobe centerline angle increases overlap. 106 LSA: 106LSA results in a decrease in piston-to-valve clearance. What Are The Wastegate Stuck Open Symptoms? For a better experience, please enable JavaScript in your browser before proceeding. But i would nt go any wider than 110. Mistakes that weaken a supercharger's performance by Mr. P. Fri Dec 12, 2008 6:36 pm, Powered by phpBB Forum Software phpBB Limited, General engine tech -- Drag Racing to Circle Track. Again this is dependent on your shift rpm and assuming you truly have 14-1 compression. its got a 3.73 posi and the Stock 4 speed with a very low 3.42 1st gear. The LSA, or lobe separation angle, is ground into the cam and cannot be changed. I think the compression ratio has something to do with LSA too. Aeromotive; 913.647.7300; AeromotiveInc.com, AFR Heads; 661.257.8124; AirFlowResearch.com, Federal Mogul/Felpro; 248.354.7700; FederalMogul.com, Mahle; 248.347.9700; Mahle-Aftermarket.com, Scat Enterprises; 310.370.5501 ScatEnterprises.com, SuperFlow Dynamometers and Flow Benches; 515.254.1654; SuperFlow.com. He also enjoys reading books a lot and his favorite author is Paula Coelho. The power and torque curve lay directly in between the last two cams, as did the peak horsepower and torque, 488.7 at 6,200 rpm and 487.1 at 4,600 rpm, respectively. Supercharged and nitrous race engines typically benefit from a wider LSA because they dont require as much overlap for exhaust scavenging as does the naturally aspirated engine, continues Bolander. Going from a 110 to 112 lobe separtaion - Ford Muscle Cars Tech Forum Because during the lower units oil change, you can go through the issue that the lower plug, Read More Yamaha Lower Unit Drain Plug Size [Explained Everything]Continue, Among the crucial parts of a vehicle ignition system is the ignition coil, also called a spark coil. Lobe Separation Angle. - 332-428 Ford FE Engine Forum Since we were only changing the lobe separation angle, we had to make sure every variable (air/fuel, timing, water, air, and oil temps) was identical during testing. Changing the lobe separation angle changes the amount of overlap that exists during the time the intake and exhaust valves are both open, echoes Doug Patton of Pro Line Race Engines. My engine shop builds all kinds of hot rod motors, and they told me that because I am running a 4 speed manual, I will better be able to take advantage of the 108 LSA. Most street cams are ground 4 degrees advanced which boosts bottom end, throttle response, vacume, mpg driveability etc. ALL bolts are ARP. As lobe seperation spreads does the powerband. Exhaust reversion is another undesirable side effect that can be caused by overlap. 13 The three power curves indicate that the wide (120-degree) LSA (green lines) lost considerable torque to the other two cams. True enough, the tight LSA improved power through the entire rev range, from 3,600 to 6,500 rpm, but the extra power came with a penalty in idle quality. A 112-114 degree lobe center will have a better idle and produce more vacuum with less overlap. As you can see in the graph, the 101 LSA cam actually had the highest cranking compression of the batch: 185 psi. Around 70 percent of muscle-car performance cams fall into this range. But, you may find a lobe wider than a 120-degree angle in any car engine.But, I must let you know that those are customized car engines prepared for any special purpose, such as racing, drag racing, off-road riding, or performing stunts. Whats a good LOBE Separation for nitrous | Yellow Bullet Forums A mobile functional near-infrared spectroscopy (fNIRS) was used to record cerebral oxygenation signals in the left prefrontal cortex (LPFC), right prefrontal cortex (RPFC), left parietal lobe (LPL), and right parietal lobe (RPL) and analyze the EC of the cerebral cortex. Really wide lobe separation angles are used in boosted applications. Call for details with your specific combination. But, after comparing these two LSA based on a few mechanical aspects, such as maximum Torque, RPM, powerband, oil consumption, and many more, you will find the 106 LSA with better performance output. The lobe separation angle is the angle in camshaft degrees between the maximum lift points, or centerlines, of the intake and exhaust lobes. so it is a solid flat tappet, torker intake, 1" 4-hole tapered spacer and 750 carb (QFT) transmission is a wide ratio toploader, rear is a 9" 3.89 geared 26"rear tires. 108 vs 112 lobe seperation. If the cylinder heads are the lungs of an engine, the camshaft is the brain. Before we all start suffering from separation anxiety, we need to understand what lobe separation angle actually is and then how it affects your engine. Cam Advise - 332-428 Ford FE Engine Forum on average with a N/A motor if you stick the two cams in at the track the tighter lsa will be faster at the expense of idle quality. So, this LSA is suitable for your engine and its components. so the power will come on a litter sooner with the 114, and fall off a little sooner? by ANT Tue May 13, 2003 1:08 pm, Post The #1 intake lobe centerline is usually between 100 Increasing the EGR effect has a good side in that it reduces the amount of oxygen in the combustion chamber. That is why 106 LSA consumes less oil. This cam split the difference between the 101 and 113 down the middle, and in theory should have walked the line between the results of the last two tests in every waywhich it did. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! Pretty much standard for an RV type cam. Typically, narrower lobe separation develops peak torque at lower rpm and widening the separation tends to build peak torque higher in the rpm range. Many later model engines use wide lobe separation angles to reduce overlap for idle quality and fuel economy. It will also give you a smoother idle and probably even better gas mileage. Whatever you do, stay under 270 advertised duration and shoot for a 110 lobe separation. by Hoxviii Mon May 12, 2003 7:50 pm, Post But there is a drawback of higher cylinder pressure: higher cylinder pressure may sometimes lead to piston or piston ring problems. LCA (lobe center angle) vs LSA (lobe seperation angle) That means your engine can produce more power with a minimum amount of fuel combustion. The piston and cylinder damage possibility is pretty low at 110 LSA. Nitrous engines, which make plenty of power and torque, often run wide lobe separation angles to moderate cylinder pressures and temperatures. Comparison Table Between 106 Vs 110 Lobe Separation Angle. All rights reserved. But remember, although a broader powerband has a couple of acceleration advantages, it also comes with a few drawbacks. Lobe seperation cant be seperated from duration,the 2 are connected.the old duntov cam had a lot less duration than many new cams so the valve overlap was not extreme and the engine ran with a gentle lope.Increase the duration by 20* and this cam would shake a 283 out of the car at idle,but then increase the lobe seperation by 4* and the motor will have a gentle lope again. A forum community dedicated to hot rod owners and enthusiasts. http://www.mustangworks.com/cgi-bin/moi-display.cgi?220, http://www.popularhotrodding.com/en6em_camshaft_specs/lobe_seperation_angle.html. The second cam would have a rougher idle, produce more torque and would rev quicker. The engine has AFR heads, Crane rockers, a TCI balancer, a Scat Rotating assembly with Mahle pistons, an Edelbrock RPM Air-Gap intake, an MSD ignition, and an Aeromotive fuel system. 110 LSA: On the contrary, 110LSA has a higher piston-to-valve clearance rate. Well, there can be different reasons for this problem. But, the narrow or broad powerband choice varies from person to person. 108: 110: 112: 114 . A narrower lobe separation angle can provide less power but can also lead to less wear. JavaScript is disabled. After spending 8 years in plant production engineering, Noah wanted to join Engine Addiction as a key member of all cars specific guides, reviews, repairs, suggestions, and more. JavaScript is disabled. A cams Lobe center angle equals intake centerline plus exhaust . GRIND #: CRB3 3194 /3196 HR111. Save my name, email, and website in this browser for the next time I comment. Our content is merely suggestive, not intended to use without proper safety precautions and advice. I also like the 106 lobe separation with the intake on 103. Brul spun the engine over with the dyno's starters and recorded 185 psi of cranking compression. On a naturally aspirated engine, the lobe separation angle has an effect on whether the engine reaches peak torque a little earlier or later in the rpm range. hydraboost is the same as a vacuum brakebooster, only the booster is replaced by a unit that does the same but under hydraulic pressure. In terms of horsepower, the disparity between all three cams was only 6.5 hp, with a scant 100 rpm separating the peaks. The 120-degree cam minimized torque production through most of the curve, while the 112-degree cam offered more torque but slightly less peak power. It had a robust powerband with tons of usable torque. AquaTraction Vs SeaDek: Which One Is Better For you? VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 112 will have a smoother idle, a wider power band, and will work better with fuel injection. These favorable mechanical features depict the powerful acceleration capacity of the engine with higher oil and energy consumption rate, overheating problems, and other mechanical problems. I think that cam had 110 lobe sep. Im loking at a summit cam with close to the same lift and duration #s but 114 lobe sep. by xstfudonniex Fri Dec 12, 2008 5:24 pm, Post With the first cam loaded in the engine (the 101 LSA) Westech's Steve Brul made three dyno pulls, the average of which was saved to compare to the next cam. by bug1914 Tue May 13, 2003 2:56 am, Post But that doesnt mean high-strung racing engines cant see gains, as well.