108 vs 110 lobe separation 108 vs 110 lobe separation

Lobe Separation Angle "LSA "Jump to Latest Follow 1 - 17 of 17 Posts . 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. It made 472.4 lb-ft at peak, a 21.5lb-ft disparity from the 101 cam. Exhaust reversion is another undesirable side effect that can be caused by overlap. 110 LSA: The 110 LSA shows up mechanically advantageous in mechanical aspects like higher RPM, lower engine knock, moderate cylinder pressure, improved idle vacuum, and higher piston-to-valve clearance. I though my car would have a nice rough idle with the solid cam with a tight LSA I put in my car, its go a slight lope to it, but it pulls hard. Noah knows a lot about whats happening in the car industry with the latest piloting productions thanks to his professional experience. Because the lobes are closer together on the 101 LSA cam, the intake closing point is advanced (closes earlier) and the piston has more time to build compressionexactly what the gauge showed. 110 LSA: But, contrarily, at 110 LSA, you dont have to face the problem of engine knocking. 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. 10 Tuning the timing curve and fuel from the 42-lb/hr FAST injectors was handled by this Holley HP management system. On larger displacement units 116 to 118 degrees of separation are common. As lobe seperation spreads does the powerband. 112 will have a smoother idle, a wider power band, and will work better with fuel injection. The Wastegate works by releasing the pressure built inside, Read More What Are The Wastegate Stuck Open Symptoms?Continue, Oops! I'm surprized at these questions as well as some of the replies. " by Hoxviii Mon May 12, 2003 7:50 pm, Post This cam also offered the highest torque output at 4,000 rpm with 522 lb-ft. Based on the peak numbers alone you might be tempted to grab the one with the tightest (108-degree) LSA, but there is more to a cam test than power. I've seen that Webcam cams can be ordered with either of the above. As usual, Marc (aka Master) is correct. Some of the programs like engine analyzer pro and dynomation seem to like some of the wider lsa's.Thanks again JOE. The lobe separation angle is a comprise of what the engine needs depending on the compression, combustion chamber, rpm, engine size, head volume, and many, many other variables. I would say 114-117* would be a normal 1960's stock cam range and 117* to 120* is more what we see on modern engines. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. Again this is dependent on your shift rpm and assuming you truly have 14-1 compression. Aluminum flywheel & pullies. The same is true for intake valve closing. The 108-degree cam offered both the most power and torque, but idle quality suffered compared to the wider LSAs. I am pretty sure, right now, you find yourself in the middle of the rising debate of 106 vs 110 lobe separation angle. Wide LSA cams are also applicable in forced-induction applications where less exhaust overlap is required. The takeaway is simple on the surface: A tighter LSA makes more low-end and peak torque at the expense of just a few top-end ponies. also,, wider will produce a wider and more flat torque curve that doesn't fall off as abruptly up top rpms. Has anybody experienced it/ tried it? ~These are just some of the drawbacks weas guys who like to go mach 10 with our hair on fire and these little motors screaming at rpms that make other guys cryhave to deal with.~. 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. 106 LSA: So, if I talk about the powerband at 106 LSA, the powerband is narrow. The only reason the advance or retard a camshaft profile is to get the timing events where they need to be. The Fora platform includes forum software by XenForo. At a lower LSA, the engine reaches the peak of the torque earlier than the standard time but generates a lower RPM.On the contrary, at a higher LSA, the engine reaches the peak torque at a higher resistance level and generates a bulk number of RPM. Is it a hydraulic roller as well? As you can see in the graph, the 101 LSA cam actually had the highest cranking compression of the batch: 185 psi. 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. A 110-degree lobe separation angle means that the peak opening points of the intake and exhaust lobes are 110 degrees apart. Cam swaps are all the rage and for good reason. Either learn to fix it, or learn to write checks. " - Voltaire. NOTE: Classic Inlines stocks the above profiles in 108, 110, and 112 lobe centers. Let's just talk lobe sep angle. too much for the street? 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. Nothing makes mouths drop like a car that sounds and looks like it can't keep it self still! Thanks again. The 234o duration kind of eliminates the RV usage. thanks. Similarly, 110 LSA is also found to be a more fabulous performer in several mechanical aspects. Valve lift will bear weight in any decision regarding LSA. The first cam featured a wide 120-degree LSA, while cam number two narrowed the angle to 112 degrees. Around 70 percent of muscle-car performance cams fall into this range. Widening their separation angle helps increase upper rpm power output. 114LSA +4 puts the intake centerline at 110 degrees before top dead center. O onovakind67 Registered Joined Dec 14, 2001 6,242 Posts Consequently, decreased torque rate often leads to more energy consumption. The tightest LSA (101) was worth 21.5 lb-ft of torque and a much broader powerbandat the cost of much lower idle vacuum, which would make it more temperamental in a street car. 110 LSA: On the contrary, 110LSA has a higher piston-to-valve clearance rate. dont sound like a verry street friendly motor butany thoughts? 68 Mustang, 306, AFR 185\'s, CI cam, FPA\'s, Bigs 650 DP, T5Z, 9" w/4.33's. Ultimately, it makes the 110 LSA an oil-consuming LSA. Another important measurement was the torque production at 4,000 rpm and this cam checked in with 484 lb-ft of torque. Torsion Beam Vs Multi Link: Who Wins the Battle? by Marc Mon May 12, 2003 11:38 am, Post Topping the short-block was a set of Chevrolet Performance CNC LS3 heads from Gandrud Chevrolet. A cam in the 110112 LSA range provides the necessary idle lobe to appease gearhead ears with acceptable manifold vacuum to run vacuum-operated accessories. This is one of the many reasons why Clay Smith Cams always recommends degreeing your camshaft in using the Lobe Center Method. So the wider LSA introduces a broader and therefore longer torque band.. As you tighten the centers ( 108 ) the same engine will make MORE power through the mide range and top end. If you drew a line that divided the intake lobe in half right at the point of maximum lift, then did the same to the exhaust lobe, then measured the distance in cam degrees between the two, that would be the lobe separation angle. by mrsmythe Tue May 13, 2003 5:45 am, Post Call for details with your specific combination. - Sheryl Crow. 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. A cams Lobe center angle equals intake centerline plus exhaust . When boost or nitrous are introduced, and engine builders contemplate choices between single-, dual- or reverse-pattern camshafts then the discussion gets muchmore technical. 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. LSA is a way of summing up the relative timing of the intake-valve events (intake opening, intake closing) to the exhaust-valve events (exhaust opening, exhaust closing) in relation to each other, and it's a great approximation of how the engine will operate. To demonstrate changes to lobe separation in action, we ordered three camshafts from Comp Cams, all ground with identical lift (0.541 intake and 0.537 exhaust) and duration (230 intake and 236 exhaust) but with three different LSAs: a 101, a 107, and a 113. Simply put, both 106 and 110 lobe separation angles have many advantages and disadvantages. A good amount of idle vacuum or increased idle vacuum found at 110 LSA advances the engines efficiency. Tests have shown that, for a given cam profile, a tighter (smaller) lobe center will produce more average horsepower and a quicker revving engine. 110 will be a bit punchier in the midrange and probalby make a little more peak horsepower as long as a good exhaust is used. I'd also go to a 110-112 lobe separation angle. I don't think your duration figures are too outlandish and with the tight LCA and high lift, it should make some big torque. 04 Minor modifications to the factory windage tray were necessary to work with the new stroker assembly. We will also custom grind any of the above profiles with a custom lobe center, for an additional $20 dollars. 108 is very tight producing lower vacuum and more of a 2 stroke "punch" powerband. Come here to talk with others who like to drive fast. If you take any of the . 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. This recommendation is only if you shift at no more than 7000. My duration will be about 230 degrees. My lift will be about .580" intake and exhaust, with about 230/236 duration with a 1.7 rocker ratio, utilizing a Jesel shaft rocker system. Really wide lobe separation angles are used in boosted applications. However, it is fixable. After consulting with many experts, you are still in confusion between 106 and 110- lobe separation angles. A forum community dedicated to Ford performance owners and enthusiasts. If the cylinder heads are the lungs of an engine, the camshaft is the brain. 106 LSA: The overlapping is higher as 106 LSA is comparatively tighter LSA than 110 LSA. 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. This wave tuning is what helps performance engines achieve volumetric efficiencies of more than 100 percent. Engine builders Chuck Lawrence, left, and Doug Patton. Retarding the camshaft (a higher intake lobe centerline number 108 vs. 104) will generally start the power band later in the RPM range and decrease the cylinder pressure. We use 86b webcams with 1.25 rockers frequently in stroker motors.It's a nice way of getting close to .500" for hot street motors with average heads. 4 Impaired episodic memory and semantic knowledge are common in TLE, although dysexecutive traits . I had an XE 274 in it. I have Crane hydraulic link bar style roller lifters, so I dont have to use the spider style. . 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. "It's not having what you want, it's wanting what you've got!" pump gas, no additive's as well, runs good, i will put the highest octane in, which is 93.. Moreover, a user from the Chevelle forum said. There are General guidelines about the effects of LSA but it should not be the deciding factor in choosing a cam. Howards Cams Retro-Fit Hydraulic Roller Camshaft and Lifter Kits CL120325-08. This overlapping has a direct influence on the oil consumption rate of the engine. When you don't have any overlap, you can't have any wave tuning. If all the specs remained the same what will going from a 110 to a 112 lsa do to driving characteristics? It is the angle that separates the intake and exhaust lobe for a particular cylinder, and is measured in camshaft degrees. THis is a real generalization, but the weaker your heads, the more you will like the smaller centers ( 106-108) the better the heads, and the higher the compression, the more it will like the wider centers ( 112-114)everything else falls somewhere in the middle( 108-110) Once you get close with the cam centerlines, it wont make much differance if you change it up or down by 2 degrees. But it is a piece of good news for your engine. Howards Cam Vs Comp Cam: Which Is The Best Option For You? The introduction of Lunati'snew Bootleggerhydraulic series - with its wicked 108-degree lobe-separation angle, fast opening profile and plenty of area under the lift curve - will serve only to fuel the flames on this heated bench-racing topic. Like choosing a cam in general, the key to eliminating separation anxiety is to find the proper balance of driveability and performance. A 112-114 degree lobe center will have a better idle and produce more vacuum with less overlap. How To Properly Replace Ignition CoilsContinue. by SStrokerAce Sun Dec 07, 2008 12:22 am, Post If that were the only consideration, the 101 cam is the clear winner. 08 Additional components used to build the stroker included a set of Comp hydraulic roller lifters, ARP head studs, and a new oil pump. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Read More Chevy 350 Ignition Coil Location And Everything About ThemContinue, What causes a car to bog down when accelerating? 554"/577" lift. It is an important note you must keep; due to the lobe separation angle, there creates an overlapping of intake valve opening time and exhaust valve closing time and vice versa. 108: 110: 112: 114 . However, in application, there is a lot more to consider. It idles very well at 650 rpm with a nice lope and runs strong. But, you may wonder knowing that a higher valve clearance rate reduces the chance of damaging the valve by the piston. The graph above compares intake valve closing points of the three cams used in the test. "Ninety-nine percent of cranking compression is dictated by static compression ratio and intake-valve closing point," said Comp Cams' Billy Godbold. Mechanical aspects like maximum torque, narrower powerband, higher cranking compression rate, efficient compression rate, effective EGR effect, and lower oil consumption rate increase the car engines efficiency and make it energy efficient. Also present during testing was a set of 1 7/8-inch Kooks headers, Comp hydraulic roller lifters, and F-body oil pan. So, now you, Read More Chevy Transmission Wont Shift Into 3rd: Finding the Main CulpritContinue, While changing the oil on your boats lower unit, you may need to change the drain plug, too. Lobe separations gives lots of overlap and lobe centers just happens when the grinder decides how the peak of the lobe will arrive on a specific grind by their tooling. by 3V Performance Sat Dec 06, 2008 4:38 pm, Post We even treated them to some chamber work before installation. 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. Typically, narrower lobe separation develops peak torque at lower rpm and widening the separation tends to build peak torque higher in the rpm range. For large port heads like the CNC 044's which can use the extra lift 1.4's make a noticable difference. Comparison Table Between 106 Vs 110 Lobe Separation Angle. 110 LSA: On the contrary, if you look at the powerband at 110 LSA, the powerband is comparatively broader. The ported heads were capable of supporting over 700 hp, so we knew they would not be restrictive on our stroker. Adding an aftermarket cam to an otherwise stock engine can boost output by 40-60 hp (or more) with no other changes (except possibly a valvespring upgrade). ALL bolts are ARP. by xstfudonniex Sat Dec 06, 2008 4:21 pm, Post If you want a lumper idle go with a cam with 108 LSA, the tigher the LSA the idle will be rougher. Elle concerne 264 taxons des degrs divers. However, a cam with 108 will only pull 12-16", which is not enough for power assisted accessories. Build your own custom newsletter with the content you love from EngineLabs, directly to your inbox, absolutely FREE! "When the low-pressure wave in the exhaust reflects into the intake, the pressure delta actually helps pull air and fuel into the cylinder. 13 The three power curves indicate that the wide (120-degree) LSA (green lines) lost considerable torque to the other two cams. Pretty much standard for an RV type cam. But you always have a cam card with the engine. It will also give you a smoother idle and probably even better gas mileage. I normally run a 106 to a 108 because I like the "hit" a tighter LC cam has when it come up on the came. Pick the cam with the valve timing events that fit the engine best, forget about LSA, it is only a result of the events. Tight lobe separations, such as 108 or shorter, will cause the peak torque to build earlier in the RPM range and peak-out in a short amount of . They also reduce stress on the outdrive. Everyone has a different idea of gentle.While its true that the duntov cam may seem rough in a 283 it is still a factory offering and they never go to radical on there profiles for street cars.If you want a rough idle, try a 283 with a .550'lift roller and 13.5 to 1 compression,THATS ROUGH. dur. Its also critical that valve overlap is kept to a minimum as the induction system can create a suction that pulls water into the motor, adds Bolander. The engine will have weak performance in the low-end range.A low vacuum can also cause the brake pedal to be quite difficult to press. You must log in or register to reply here. It affects the powerband and temperament of a motor more than any other single part, and a slight change can turn a car from a mild-tempered grocery-getter to a downright nasty machine. Thanks. After the next three pulls, it was clear the 113 cam was way down on low-end torque. That notion is completely false. JavaScript is disabled. It should still make close to 600hp and 600tq in my 512" stealth headed big block. I personally prefer to sacrifice the small amount more power for better idle quality. 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. If the intake valve opens too early, it will push the new charge into the intake manifold. A narrower LCA will increase valve overlap and close the (intake) valve earlier, which explains the typical rougher idler and more midrange behaviour. The extra cubic inches will smooth out a rough idle in a 327. Knife edged & profiled 4MA Cleveland crank weighing 50lbs. Pontiac 326 Vs Chevy 327 Differences & Similarities. The 114o lobe will add a lot more vacuum at idle. 03 The 4.000-inch crank and 6.125-inch rods were combined with a set of forged asymmetrical pistons from JE. The only reason I . Kevko baffled oil pan & Milidon windage tray. The article was called "Separation of Power" and they tested 5 cams ranged from 106 to 114 LSA. A wider lobe center will give you more overall torque (comes in earlier and stays later). Pinning the tail on the perfect cam can certainly be a difficult task. The lobe separation angle is the angle between the two camshaft lobes that act on the valves. The second cam would have a rougher idle, produce more torque and would rev quicker. L'auteur prsente une nouvelle contribution de floristique nord-africaine consacre la flore du massif du Rif et des rgions du nord du Maroc, dans le cadre gographique prdfini par le Catalogue des Plantes vasculaires du Nord du Maroc de Valds et al. Methods: We evaluated 30 individuals with PD (62.47.2 years) and 22 age-matched healthy controls (61.06.4 years). This is why the LS series, and many other modern engines, can make great power on top and bottom with wide LSA camshafts and why a plethora of factory cylinder heads are flowing near (or above) 300 cfm. This comparison highlights that the 106 LSA is a good performer in a few mechanical aspects than the 110 LSA. 06 The ported heads featured a 2.165/1.590-inch valve combo. The 112-degree cam offered nearly all the low-speed and mid-range torque of the 108 cam but the peak power suffered above 5,200 rpm. lobe centers and lobe separation are 2 different things . What Is the SBC Header Bolt Torque? The absence of engine knocking ensures that your car engine is reasonably combusting the fuel. = Tight Below 104 Deg. I do believe that stock VW seperation is 108 and 112 is used alot in turbo and midrange cams for VW's while 106 is used for the top end cams. Introduction. A wider lobe separation angle can often provide more power, but it can also lead to more wear on the engine. The center of those 2 events is the LOBE CENTERLINE (ECL). For any additional clarification or questions please contact our Tech Line at 714 523-0530. https://www.youtube.com/watch?v=57gfBu8uc6k&t=1s. GRIND #: CRB3 3194 /3196 HR111. The custom cams we selected all featured 0.624-inch lift (both intake and exhaust) and a 232/242-degree duration split. In the 106 LSA, the engine can reach the maximum torque, making the driving more efficient and saving energy. by bigjoe1 Sat Dec 06, 2008 10:48 pm, Post . Looking at 108vs. Frankly cams with a 108-114 lca unless in the perfect combo you won't usually see more than 15hp and you won't really feel the difference except for either a peaky or broad power band. I think you are asking a lot of a cam . All rights reserved. It also depends on what the vehicle will be used for and if economy and vacuum are important. Cam timing plays an important role not only in the power generated but also the overall character of the powerplant. I just bought a 86b Webcam and Im using 1.5's. I'm sorry to disagree with that incredibly well written article, but lobe separation by itself is absolutely freaking meaningless. Maybe even 114. The 114 LSA is good for a blower or nitros motor. I forgot to add that poor vacuum is not much of a concern to me because I have no power accessories. Generally, naturally aspirated engines run narrower lobe separation angles of around 106 to 108 whereas supercharged, turbo or nitrous engines operate with 112 to 114 and higher. 09 All testing was run through a set of 1 3/4-inch long-tube headers and 3-inch exhaust. LSA CAM TEST-108 vs 112 vs 120 Richard Holdener 239K subscribers 168K views 2 years ago WESTECH PERFORMANCE GROUP FULL RESULTS-CHANGE ONLY LSA-LS CAM TEST. A lower efficient compression rate leads to a higher fuel consumption rate by your engine to produce higher power. by ANT Thu May 15, 2003 6:44 pm, Copyright 2022, S&S Motorsports LLC, All Rights Reserved - Powered by phpBB Forum Software phpBB Limited. Despite no changes in lift or duration, this cam sounded much more aggressive than the other two with wider LSAs. I know a little about cams. It's the scavenging effect of the high velocity exhaust gases rushing out that pulls the fresh fuel/air charge into the chamber. A cam 112LSA with 4 degrees advance puts the intake centerline at 108 degrees. Pretty much standard for an RV type cam. by ANT Mon May 12, 2003 1:47 pm, Post Again, these are general bits of conventional wisdom. 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. However, finding them might be challenging if you dont have any prior knowledge. [img]http://i67.photobucket.com/albums/h291/downsideup09/DSCF2616-1.jpg[/img], [img]http://photos-g.ak.fbcdn.net/hphotos-ak-snc1/hs139.snc1/5928_111214857139_110806152139_2127222_6826389_n.jpg[/img]. . Most cars use more than, Read More Does It Matter Which Ignition Coil Goes Where? Simply put, the lobe center of the camshaft controls where the power curve is applied. 106 LSA: At 106 LSA, the cylinder pressure is a bit higher. On a tight lobe separation, like 106-108 degrees, the engine will build torque quickly and reach its peak early. 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. to use this representational knowledge to guide current and future action. If you changed the lobe separation of a street engine from 112 degrees to 106 and didnt do anything else, adds Kaase. After swimming through the entire article, I hope you are now well aware of the 102 vs 110 lobe separation angle. In this segment, I am going to compare those two lobe separation angles based on a couple of mechanical factors. by bug1914 Tue May 13, 2003 2:56 am, Post 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. I bet you won't see a bit of difference. Lobe sepsration is an advanced description for overlap.If you take a cam on a 112,and grind it on a 108,you add more overlap,the time the valves are both open.Narrower lobe centers mean more low end and midrange torque,along with a peakier powerband,and a slightly rougher idle.Tradeoffs are sensitivity to octane ratings,total timing, and air fuel ratio.A lot to swallow I know,hope this helps you. In my opinion, the rougher the idle the better! Lobe separations on 383-406 cids.104-106-108-110? LS Exhaust Manifold Bolt Torque (Everything You Need To Know), Holley Power Valve Sizes: Everything There is to Know. 106 LSA: 106LSA results in a decrease in piston-to-valve clearance. Now its not shifting into 3rd and you are here. I just bought a 86b Webcam with 112 lobe centers for my 2276. It affects the amount of valve overlap; that is the brief period of time when both the intake and exhaust valves are open.. Alternatively, if you are running a bigger camshaft to gain maximum top-end power, cam makers often suggest reducing the lobe separation angle to recover power lost in the lower rev range.. Well, it is quite a natural event that you may not find the lope separation angle mentioned at the engine body. 110* LSA - lobe separation angle (lobe displacement angle) The +2* means your intake lobe centerline is advanced to obtain a 108* ICL - intake centerline and a 112* ECL - exhaust centerline. Part Number: HRS-CL120325-08. by lazaris Fri Dec 12, 2008 2:18 pm, Post The 108 LSA offered the lowest idle vacuum of the three (down 4 inches). All three terms are similar, as they all relate to the relationship between the centerline of the Intake lobe and the centerline of the Exhaust lobe. 106 LSA: At this LSA, the car machine has to confront the reduction of idle vacuum rate quite often. A cam with 110 lobe center will pull approximately 14-18"of vacuum is borderline for that type of application. 106 LSA: As you know, the intake and exhaust lobes centerline distance is known as lobe separation angle. Idle vacuum showed a considerable spike to 14.7 in-Hg, likely the difference between being able to run power brakes and a mandatory leg workout. so the power will come on a litter sooner with the 114, and fall off a little sooner? I've seen that Webcam cams can be ordered with either of the above. Lobe separation angles, he continues, are influenced by the camshaft grind. 238/248 duration, 300/310 adv. You get a better idle, vacuum, and response from a 112o-114o lobe. It a 355. thanks in advance. Here are the basics: higher lift values open the valves to increase airflow and longer duration keeps the valves open longer. A cam with a 112 lobe center will idle smoother than a cam with a 110 lobe center. Enter lobe separation angle. You cannot look at just the LCA without looking at other specs too. Although both wide (112-116) and narrow (102-110) lobe separation angles do have an effect on overlap, it's still possible to get a lot of overlap with very wide lobe separation angle cams. The intake lobe centerline is measured in crankshaft degrees. TH400 Vs Powerglide: Which One is Ideal for You? Anybody here run a 108 LSA? Check out the Comp Cams catalog, even the biggest hydraulic rollers use 110.