shovelhead compression test|1982 Harley Davidson FXR Shovelhead Compression Test HD : online sales A detailed video on how to do a cranking compression check on a Harley Davidson Motorcycle.
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shovelhead rebuild worries
I just picked up a 1978 Lowrider and the owner has had it since new. He swears that the 9.300 on the odometer is correct. I got it home tonight and did a compression test. Found 150# one the rear and 135# on the front. I added a little oil to the front cylinder and the .
Shovelhead compression test question (s)
To determine whether this is what is wrong, I would remove the plugs and ground . Quick kick on shovelhead compression test question. So I'm starting a winter hopefully top end only rebuild on my 77 shovel. I did what I think is a "proper" compression .
Compression could be due to how they tried to manage EPA requirements in a particular model year, along with jetting, ignition timing, etc. Pinging can be due to lean .Shovelheads have a big, open, lazy chamber (but it's a HEMI!). So, they are subject to spark knock and detonation at relatively low compression ratios as compared to an automobile . A detailed video on how to do a cranking compression check on a Harley Davidson Motorcycle.
I would avoid raising compression higher than 8:1 on your Shovelhead since they will detonate. Some say this can be avoided with dual plugs but I'm lazy and that's a lot of extra hardware and wiring. Original 80" .
1982 Harley Davidson FXR Shovelhead Compression Test HD 1080p. The latest project in the fleet of madness. This old Shovelhead has a story and it's one that I do not . My Twin Cam service manual does not have compression values, but both my Evo and Shovelhead manuals say compression should be over 90 psi. @ operating temp., .
Shovelhead compression ratio and pinging
Shovelhead Compression Ratio.
static torsion test
To determine whether this is what is wrong, I would remove the plugs and ground them out. Then do a compression check with the engine warm and throttle open. If the .
I had nearly 0 compression in my front cylinder suddenly and suspected the intake valve because of some history I won't get into here. Removed the head did a leak test and sure enough both valves had a minor leak. Got the valveseats recut, a fresh valve guide, lapped the valves and put it all back together. Compression is now at 60. WTF.
Learn why a motorcycle compression test is an important starting point to get a good view on the health of an engine. Made a leak test and compression test today, after about 20 min warmup, at my 1958 FLH with following results: Leak Test: Front Cyl 16-18% / Rear Cyl 15-17% Compression Test (dry): Front Cyl 86 PSI / Rear Cyl 115 PSI Copression Test (oil on piston): Front Cyl 101 PSI / Rear Cyl 138 PSI
Hey I need some help finding the correct PSI reading when doing a compression test on a 2012 wide glide with a stock unmodified 103 engine. Anybody know what it is? . My Twin Cam service manual does not have compression values, but both my Evo and Shovelhead manuals say compression should be over 90 psi. @ operating temp., with less than 10% . Performing a cylinder leakdown test is crucial to determining the mechanical integrity of an engine. I'm demonstrating this on a Harley Davidson Shovelhead, .
Shaving heads on a Shovelhead is a serious mistake. They run best at 7.5:1 compression. They will rn OK at 9:1 but if you take another .050 or so off, you will have pinging, detonation, pre-ignition, spark knock (pick one). I bought a set of heads at a swap meet. I did not realize that they had been shaved about .060. I went with the 93 after spending a lot of time checking out the SS options. I even spent a couple of hours with the factory reps at the SS factory. (In-laws live 20 miles from factory.) I chose the 93 regular compression over other options simply becasue the factory reps believed it was going to give the best engine life over other units.Shovelhead Compression Ratio. 08-27-2019, 11:17 AM. Choosing pistons for an 80 inch Superglide. Keith Black, Forged. S&S Heads with 121 CC combustion chamber. Stock spec says 8:1, 8.5:1 for the FXST. For the 81 and later drops to 7.4:1? The KB options are calculated based on a 117CC (slightly smaller) Chamber, and are 8:6:1 and 9.5:1 .
Did a top-end rebuild last year, of a '71 Shovelhead with S&S 84" stroker kit, solid lifters and Andrews B cam (same configuration since '79). New guides and seats, new S&S pistons, 0.020". Also replaced the old Stromberg with a Mkuni HSR42. Other than the front cylinder consistently showing 10 PSI lowerThose Dyno Guys. Building 2, 7200 73rd Street North, Pinellas Park, FL, 33781, United States 763-263-3966 [email protected] What is the average psi on a compression test for a stock 74 cubic inch shovelhead? And what is the tolerable variance between the cylinders? My dry reading was front cylinder 90 psi and rear cyclinder was 110. My wet reading .
03 Road King compression test Can someone tell me if the hollow bolts connecting the air filter to the cylinders have anything to do with compression readings. According to Clymer the torque on these bolts call for 124 142 inch pounds, which translates approximately to 10ft. pounds.Wondering if these factors have anything to do with readings. The Ironhead Sporty and Shovelhead engines have large hemi-like combustion chambers with high surface-to-volume ratios, which increase heat loss. . Test and tune to determine the optimum spark advance for your engine. A leak-down tester is an excellent tool for checking cylinder sealing and more revealing than a compression tester. A leak .In Example 1, cylinder #1 has a snap test reading that is much lower than the other cylinders. If a snap reading is low (much less than 80% cranking compression), look for air intake problems such as severe carbon deposits on intake valves, worn cam lobe,worn valve guides and springs, rocker or push rod problems, or "shutter valve" miss-positioned in the runners of a variable .
Much like the legendary tales of the open road, the Shovelhead engine epitomizes the spirit of vintage Harley Davidsons. . (1,200 cc) or 80 cubic inches (1,300 cc), providing you with the torque and power to conquer the open road. With a compression ratio around 8.5:1, it strikes a perfect balance between performance and reliability.
Harley-Davidson Shovelhead engine at the Harley-Davidson Museum. The Shovelhead engine is a motorcycle engine that was produced by Harley-Davidson from 1966 to 1984, built as a successor to the previous Panhead .
I just finished with the top end rebuild of my 83 shovelhead. installed a b grind cam, rebuilt the heads and rocker boxes, new tappets w/solid lifters and 40 over pistons. . Then do a compression check with the engine warm and throttle open. If the compression is low (or somewhat lower, perhaps more than 10% ) in that cylinder, especially . I need help finding TDC on my 75 flh shovelhead motor 74ci. Ok I set my points on the big and little lobe .18 I go to the primary side open the timing hole. I give it some bumps with the kicker and stair at the hole. Well I have 3# marks on the flywheel. WTF I have a up and down line, a dot towards the top and a dot
1975 Harley Davidson with factory tank shift What should the compression be on a Shovelhead? Your compression is fine. The factory shop book calls for anything over 90psi with not more than 30psi beetween the two cyliders. . How to do a compression test on a Harley Davidson? Hold your throttle wide open to allow for as much air as possible to enter the engine for its compression stroke . Having only just bought this bike I was wondering if someone can tell me what the compression should be on a 1340 Evo. I have a workshop manual from when I had my 1993 Springer which I am now using for my '88 Springer. . The manual claims it should have 90 PSI. I thought that was pretty low. I did a test on the bike and it read 190 PSI for .
The nice thing about the low compression is that the engine runs relatively cool and I don't experience pre-ignition with it under any circumstances, even when pulling hard. Any more compression and I would likely be forced to go to dual plugs. The best HD engines in which to use really high compression would be the Evo or the TC engines. Thanks for the tip on torqueing. Another matter I was concerned with (my heads aren't torqued) I knew that any improvised wrenching would skew the torque bar readings. I just can't understand why with a clear need for an application as critical as head bolt torqueing on shovelheads a tool is not readily available to shovelhead owners. Ok I did both test, this is what I got. compression front 75psi, rear 100psi. ok leak down test tha only air i can hear is out of the intake but very light can barley event hear it. So now what could be causing the front cylinder to smoke white and soak the inside of pipe in gas? Intake? head gasket? or any other ideas would be helpfull SHOVELHEAD RUN A COMPRESSION TEST,WET AND DRY.SOUNDS LIKE SOME BLOW BY . Save Share Reply Quote Like. Zack. 153 posts
This video shows how to check H-D Evo motor compression using an external (booster) battery. The test can be performed in the same manner on the carbureted . I also did a compression test, it seemed to go well. The needle jumped to 90 immediately and built up to 122 and 130 psi front and back within a few revolutions. I will have to tear up a spark plug and weld together the bits for a leak down test before I can be sure the valves are sealing well and the heads are tight.
Shovelhead 74" to 80"?
Quick kick on shovelhead compression test question
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shovelhead compression test|1982 Harley Davidson FXR Shovelhead Compression Test HD