108 vs 110 lobe separation

. Kevko baffled oil pan & Milidon windage tray. whats the difference in how the car will run. But an interestingly shocking fact is that this event escalates the air-fuel mixtures reaction rates, causing temperatures to rise and causing the problem of overheating the engine. That way you can discuss what you want from the engine and how changes in LSA or any of the other specs will affect how the engine performs. by Kdub Sat Dec 06, 2008 11:05 pm, Post A lower efficient compression rate leads to a higher fuel consumption rate by your engine to produce higher power. Well, If I am not mistaken, you must be looking for which angle has what impact on your engine or which would be the best. Come here to talk with others who like to drive fast. by MELWAY Sat Dec 06, 2008 4:18 pm, Post 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. Generally speaking, decreasing the lobe centerline angle increases overlap. I bet you won't see a bit of difference. The 114 cam will give more low end torque, good midrange, less power up high. When choosing a cam, power gains shouldn't be the only consideration. music to your ears? by lazaris Fri Dec 12, 2008 2:18 pm, Post 110 LSA: On the other hand, 110 LSA is a wider LSA with almost no overlap. A forum community dedicated to Ford performance owners and enthusiasts. Known as "The Gladiator" around Westech Performance, this Dart SHP blockbased, 370ci, small-block Chevy has made thousands of dyno pulls testing all manner of heads, intakes, cams, and every other crazy thing us magazine folk have coerced Westech's Steve Brul to bolt to it. 1966 Toyota Landcruiserunder construction. 1-4 It is one of the most common neurological disorders worldwide, 1-5 is among the most common . = Extremely Tight . The standard bore block was then stuffed with a 4340 forged steel 4.0-inch crank and 6.125-inch rods, along with a set of flat-top, forged JE pistons. The center of those 2 events is the LOBE CENTERLINE (ECL). Torsion Beam Vs Multi Link: Who Wins the Battle? I have Crane hydraulic link bar style roller lifters, so I dont have to use the spider style. If you take any of the . 09 All testing was run through a set of 1 3/4-inch long-tube headers and 3-inch exhaust. Bad idea in my view. by xstfudonniex Sat Dec 06, 2008 4:21 pm, Post by bigjoe1 Sat Dec 06, 2008 10:48 pm, Post As you tighten the centers ( 108 ) the same engine will make MORE power through the mide range and top end. As you can see in the graph, the 101 LSA cam actually had the highest cranking compression of the batch: 185 psi. For a better experience, please enable JavaScript in your browser before proceeding. 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. by ANT Mon May 12, 2003 1:47 pm, Post 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. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Making this the biggest obstacle to overcome when selecting a cam profile with one of our tech advisors, explaining the definition and importance of the Lobe Center. 114LSA +4 puts the intake centerline at 110 degrees before top dead center. 106 LSA: There is an increasing chance of engine knock at the 106 lobe separation angle. The 108-degree cam (blue lines) outperformed the other two, but idle quality suffered. This may be of concern if you have vacuum assisted accessories, such as power brakes or steering. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! However, it is fixable. (ICL + ECL) / 2 = LOBE SEPARATION ANGLE (LSA) LSA is a RESULT of the PROPER events. The article was called "Separation of Power" and they tested 5 cams ranged from 106 to 114 LSA. The 108 LSA offered the lowest idle vacuum of the three (down 4 inches). by trmnatr Sat Dec 06, 2008 10:45 pm, Post LS Exhaust Manifold Bolt Torque (Everything You Need To Know), Holley Power Valve Sizes: Everything There is to Know. The first cam featured a wide 120-degree LSA, while cam number two narrowed the angle to 112 degrees. 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. That lopey idle that is universally loved, and part of the allure of a tight LSA cam, is actually misfire caused from a combination of exhaust dilution in the intake manifold and poor cylinder filling at idle. General topics - 76 LA built, CA car with m20. The lumpy-idling 101 LSA cam churned out an average of 484.0 hp at 6,100 rpm with 493.9 lb-ft of torque at 4,400 rpm. Hopefully it turns out great. Typically, narrower lobe separation develops peak torque at lower rpm and widening the separation tends to build peak torque higher in the rpm range. Yeah but do the experiment on the dyno and tell me your intuition is correct. Cam timing plays an important role not only in the power generated but also the overall character of the powerplant. "It's not having what you want, it's wanting what you've got!" 108* or narrower lobe separation angle (LSA) is "Narrow" and 114* or wider (up to 117* or 120* for stock cams) is "Wide" , with 110 to 112* being the "normal" hot-rod cam. Well, I saw that Erson makes some nice hydraulic rollers with 108 LSAs, and I know that tighter LSAs have more midrange, so I thought they might be worth a try. "When the low-pressure wave in the exhaust reflects into the intake, the pressure delta actually helps pull air and fuel into the cylinder. Okay, have a sigh because you have opened the right door. For example, an oval-track small-block that needs to motivate the car off the turns quickly might have a narrow LSA of around 106 degrees, resulting in more overlap. 106 LSA: The scale of efficient compression rises at 106 LSA. On a tight lobe separation, like 106-108 degrees, the engine will build torque quickly and reach its peak early. A cam with a 112 lobe center will idle smoother than a cam with a 110 lobe center. Copyright 2022, S&S Motorsports LLC, All Rights Reserved - Powered by, http://www.webcamshafts.com/cam_glossary.html, http://www.newcovenant.com/speedcrafter haft/3.htm, Webcam 86A 108LC w/1.5 vs 86B 112LC w/1.3s. by SStrokerAce Sun Dec 07, 2008 12:22 am, Post Equipped with the 120-degree (LSA) cam, the hybrid stroker produced 570 hp at 6,200 rpm and 535 lb-ft of torque at 5,200 rpm. Average power was also down, but the engine pulled ahead of the 101 cam at 5,400 rpm, picking up 6.5 hp at peak. As a result of this fall, the idle of the engine has to face suffering quite often. The Fora platform includes forum software by XenForo. The higher the compression and the higher you try and rev it, the more it will like a wider lobe center. Realize what the engine is going in, however, as you may not be able to use the wildest cam out there. by SStrokerAce Sat Dec 06, 2008 7:36 pm, Post It produces peak torque earliercoming on quicker and strongerbut also it falls off quicker too. If two cams are identical with the exception of lobe separation angle (we'll say 108 and 114) the cam with 114LSA will make more low end power than the 108LSA cam? by jim martin Mon May 12, 2003 7:10 pm, Post . As the RPM's go up this is not as critical as the higher velocity of the air/fuel moving thru keeps it from getting contaminated. Due to the tightness and frequent overlapping of the intake and exhaust valves, the engine cant generate the high RPM as it is supposed to. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. The only reason the advance or retard a camshaft profile is to get the timing events where they need to be. by Hoxviii Mon May 12, 2003 7:50 pm, Post Simply put, both 106 and 110 lobe separation angles have many advantages and disadvantages. Some of the programs like engine analyzer pro and dynomation seem to like some of the wider lsa's.Thanks again JOE. The 112-degree cam (red lines) picked up much of the torque, but the big winner was the cam with the tightest lobe separation angle. Engine builders Chuck Lawrence, left, and Doug Patton. Now its not shifting into 3rd and you are here. by farmer Mon May 12, 2003 3:14 pm, Post Has anybody experienced it/ tried it? 110 LSA: On the contrary, at 110 LSA, the engine fails to reach the maximum torque, resulting in a decrease in torque rate. Lower cylinder pressure is advantageous for your engine. Knife edged & profiled 4MA Cleveland crank weighing 50lbs. If you compared these two cams side by side in identical engines, the first cam would actually have a slightly better idle and would produce slightly more peak power at upper RPM's. A wide lobe seperation is not always better than a narrow one, or vise versa. ditto with the above. Around 70 percent of muscle-car performance cams fall into this range. Getting back to the sound of an engine, its no secret that a raucous, lumpy idle is often preferred by street cruisers, regardless of the ill manners and inefficiency of such an engine setup. If that were the only consideration, the 101 cam is the clear winner. The idle quality was better with the 112-degree LSA but not as good as the wider 120-degree cam.The ultra-wide 120-degree LSA lost low-speed power and never recovered, but know that this wide LSA is often beneficial on positive displacement, supercharged applications. FWIW. Higher lift and longer duration profiles add power, but do so at higher engine speeds (especially true of duration). Call for details with your specific combination. Bolander says those cams help promote torque in a controlled and predictable manner, especially in no-wake zones and around the docks. While a cam with a 108 lobe center will idle rougher. Frontal lobe epilepsy (FLE), the second most common focal epilepsy syndrome after temporal lobe epilepsy (TLE), is frequently drug-resistant and MRI-negative. 15,215. ohio. 110 LSA: You will find the complete opposite scenario here. A cam with a 112 lobe center will pull approximately 16-20" of vacuum, which is good for power brakes. So, this LSA is suitable for your engine and its components. Build your own custom newsletter with the content you love from EngineLabs, directly to your inbox, absolutely FREE! The second cam would have a rougher idle, produce more torque and would rev quicker. 01 Choosing the right lobe separation angle for your LS cam shouldn't cause anxiety.