harley twin cam compression test|Piston compression psi help : suppliers See more tips and how to's on Countersteer : https://www.jpcycles.com/countersteer?utm_source=youtube&utm_medium=description&utm_campaign=How_to_Perform_a_Co.
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Firstly, 160psi is perfect for the 88ci motor from what can tell, with these cams installed and OEM headgaskets and pistons. 04 has 140 psi in . I am checking the compression on a 05 Twin Cam, the person that owns the bike thinks it has a 95 inch big bore kit and an aftermarket cam . Stock harley motors, in very good internal condition, no matter the vintage or size, or make and model they are installed in generally make around 140psi, depending on the .
My snap-on says to take two readings, one at 4 engine cycles and the other when the gauge reaches max pressure. The first seems to correspond to the dynamic pressure calc. . 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., . See more tips and how to's on Countersteer : https://www.jpcycles.com/countersteer?utm_source=youtube&utm_medium=description&utm_campaign=How_to_Perform_a_Co. compression releases . V-Twin Harley Davidson forum. Discussion on V-Twin Harley Davidson motorcycles including Dyna, Electra Glide, Softail, Sportster, and more. . Show Less . Full Forum Listing. Explore .
Twin-Cam Compression and Engine Displacement Calculator Choose Engine Size 88 ci 3.750x4.000 95 ci 3.875x4.000 96 ci 3.750x4.375 98 ci 3.938x4.000 103 ci 3.875x4.375 103 ci 4.060x4.000 107 ci 3.938x4.375 107 ci 4.125x4.000 110 ci 4.000x4.375 113 ci 4.060x4.375 113 ci 4.250x4.000 116 ci 4.000x4.625 117 ci 4.060x4.500 117 ci 4.125x4.375 120 ci 4 .
Twin can 88 compression test, whats acceptable
Did a compression test yesterday out of curiosity got 155 psig and 150 psig on each cylinder. Thought that was low so shot some oil into each hole and got the same readings. . General Harley Talk Twin-Cam Engine . A detailed video on how to do a cranking compression check on a Harley Davidson Motorcycle. Not having the money to do a Big Bore kit this winter, was thinking since i do have the money to do a Woods 555 cam would it be wise to have the heads decked to up the compression from 9.5 to 10.5 would also have releases installed also. eventually i would like to install somthing along the line of a 110 ci Big Bore. would this cam work well with the 110 ci . Twin Cam 103 Fat Bob - Disable ACR's for Compression Test? . On my manual it doesn't mention disabling them for the compression test, only making sure they're closed for the leakdown test. My bike has 48k miles on it, only 3k from me, it's a 2013. When I got it it had a Harley stage 1 tune on it and it was running hot as hell, but when I did .
I just did a compression test then I read you have to have the throttle wide open when doing it which I did not. I got a reading of 120 psi in both. HDTIMELINE. HDTIMELINE. . *Twin Cam CV Carb Rejet Suggestions - Harley Davidson Community . G. goofysniper Member. Apr 11, 2009 #7
Piston compression psi help
The air pressure will turn the motor over. and you want to keep it at TDC during the whole leak test proceedure. Keeping the trans in 5th and the rear tire on the ground. will keep the engine from turning over. . V-Twin Harley Davidson forum. Discussion on V-Twin Harley Davidson motorcycles including Dyna, Electra Glide, Softail . Most of the SE head kits cam combo's are int eh 10.1 and 10.5 ratio more than you would want to take a 37 g cam. You are limited to cams with the se heads and h/c pistons. The cam that really works is a woods tw5g as it will take the 10.5 ratio and still bolt in under the stock se springs, and it will give you the bottom end that the 211 and up .
IMO that is the best way to test the whole system. Remove plugs and open throttle blade all the way. Perform compression check. Note numbers. Pull CR fuse and repeat test. Numbers should be different by about 30-40 psi.
If the compression test was not run this way, the results don't tell us anything. 2. A compression test is too general to reveal the condition of the top end; next test should be a leak down test to find out where the compression is being lost. 3. 1/4 of oil consumed in a 250 mile ride = 1 quart every 1000 miles.Find Automatic Compression Release 28861-07A at Harley-Davidson.com. Free shipping on orders + and free returns. Select your store; . Test Ride; Dealer Locator; . ACR can be installed on stock or Screamin' Eagle ® Performance cylinder heads for all '07-later Twin Cam equipped models
V-Twin Compression Calculator Pick Engine Size . Your measured volume should be entered here-M8 89cc Twin Cam 88-103 is 87cc Deck Height Front Cyl: inches Negative number if piston . Harley Davidson . Harley Davidson Tune Pricing 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% variance between front & rear. The 180 psi Jack mentioned is what I normally think of as good. This is for stock or moderate cams. The most important type of compression you should be concerned about in motor design is the corrected compression. Corrected compression is controlled by your cam's timing and when the intake valve closes. Here's an example: in this case, the test bike is a 95-inch Twin Cam with a 9.5:1 static compression. Say you want to run the Andrews TW60 cam.
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compression test..HELP!!! Hi does anyone know what a maximum reading of compression psi could be for an '88 evo motor ,recently built a basket case motor and its was initially hard to start,thought it had a bad starter so bought an all balls 1.4 kw and new battery which seemed to cure it for a while then it fried!got a new one but struggled to turn motor over . :badmood:Hi - if you go to a high static compression (10.5:1 or 11:1) - you need the longer duration cam (min. a 259E or 585 S&S) to keep the actual cranking CR in the 9.2:1 to 9.8:1 range. the whole idea of the higher static CR is to maintain running cylinder pressure with the longer duration cam that allows the motor to pump more air & fuel .
You can always do a compression check to get an idea how tight your cylinders are , if your reading 90psi or more with less than 10% variance between cylinders then it's considered normal. . Had a 99 FLHR twin cam. Bought at 33k miles. Put S&S gear drive cams in at 65k. . I changed the clutch basket because i wanted all new bearings clutch .Harley-Davidson Twin Cam engine at the Harley-Davidson Museum. The Harley-Davidson Twin Cam are motorcycle engines made by Harley-Davidson from 1998 to 2017. 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 . the engine is stock bore, andrews 46 cam, and ported heads- shop said they had been milled before to bump compression about 1 point or so. The gaskets I used were from Harley- I even went to the service dept and asked specifically about that O .
This could give you an "all's well" leak down and compression test but still cause issues while running. 1998 Obsolete EVO Springer. . General Harley Talk Twin-Cam Engine Harley Davidson Evolution and Twin Cam Touring My Story, the Beginning. Harley-Davidson FXR. Top Contributors this Month View All. Compression test performed on 2000 Harley Ultra Classic with 100" S & S big bore kit and S & S 571 gear drive, Easy Start cams. Starting the engine during th. trying to get a read if I have high compression pistons. I have no contact with PO. 02 twin cam 88, probably been cammed. . IMO you can't tell if you have high compression pistons by doing a compression test. Too many factors of cam specs. involved. Not counting conditions of valves rings, etc. . A forum community dedicated to all Harley . Looking to see if anyone knows what the stock compression should be on an 88 (2001) . Discussion on V-Twin Harley Davidson motorcycles including Dyna, Electra Glide, Softail, Sportster, and more. . Show Less . Full Forum Listing. Explore Our Forums. General Harley Talk Twin-Cam Engine Harley Davidson Evolution and Twin Cam Touring My Story .
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Since no compression builds until after the intake valve closes, it's the corrected compression ratio that gives the best indication of how pump gas friendly your motor will be. Premium pump gas in the U.S. will generally tolerate corrected compression ratios of .just a quick, down-and-dirty video that shows how I performed a leak-down test on my 2000 Harley bagger that is equipped with a fuel injected Twin Cam engine. S&S recommends around 9.7 compression for this cam. The heads will be reworked and will use JE pistons. . Discussion on V-Twin Harley Davidson motorcycles including Dyna, Electra Glide, Softail, Sportster, and more. . Explore Our Forums. General Harley Talk Twin-Cam Engine Harley Davidson Evolution and Twin Cam Touring My Story, .
How to perform a cold compression test
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harley twin cam compression test|Piston compression psi help