1275 mg compression test|acceptable compression 1275 : MG Midget Forum : The MG : factory Let it set for about 26 hours, blew it out, and did another compression test. This time . Precisa de ajuda para acessar? Entre em contato com
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It could have been machined badly, as mentioned above, or built to be high compression. Have you seen if it has flat-top pistons fitted, for example? The payen gasket would not cause the high compression.My Sprite/MG Midget Handbook and Service Manual lists a compression of .Let it set for about 26 hours, blew it out, and did another compression test. This time .As was said, easiest way is to take ALL plugs out, put your tester in #1 socket .
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acceptable compression 1275 : MG Midget Forum : The MG
Everything MG Fans Should Know About The 1275CC
My Sprite/MG Midget Handbook and Service Manual lists a compression of 120 for a 8.8:1 1275 engine (seems a bit low). However, I will be rebuilding, with parts from Hap to .
Let it set for about 26 hours, blew it out, and did another compression test. This time my results were 100, 110, 110, and 130 from the front to the back. What should these . hi, i have just bought a clubman with a 1275 engine. i want the engine for my other mini and will check it over before i fit it. i did a dry compression test it last night and and got . The 1275's came with two compression ratio's and likely two differenct horsepower ratings. The 8.8/1 enginese were in the 1967 to 1971 range and the 8.0/1 engines . I'm going to do a compression test tomorrow, check for any intake leaks, earth connections, recheck rocker and plug gaps, reconnect vacuum pipe, and once having a play .
does anyone know how much cyl. psi a 1275 austin engine should have to run properly? currently at 120-125 psi. thanx, bob. If you are considering the purchase of an MG Midget Mk3 with the 1275cc engine, here are a few tips: Cylinder compression readings should be somewhere in the 130psi to 160psi range, with.
As was said, easiest way is to take ALL plugs out, put your tester in #1 socket and with the throttle wide open turn the engine over a few times and record the pressure. Proceed . a lot of oil, perhaps more than you should be for the test. Remember that in a 1275cc engine with approx 10:1 compression the combustion chambers are in the order of 30 . That head was replaced by a 12G940 head which are an excellent head with no issues, I replaced the smog head on my 74 Midget with a 12G940 that I bought on eBay for 0.00 and it came with hardened seats. Anyway, . I just did a compression test on my 1275 and here are the results: one =140, two=125, three=125, four=140. I installed new rings about 1200 miles ago and had the head/vale’s professionally rebuilt. I also checked cylinders .
He gets into the specs on all the various engines up though 69. The 1275 engine compression ration changed from GAN4 MKIII to GAN5 MKIII. The piston dish changed. The 1969 1275 GAN4 was a 8.8 compression . Ok have done the new compression test with plugs out and throttle open readings were as follows from front to back #1 was132, #3 was115 #4 was 90 #2 was 90 the car has only ran a total of maybe 1 hour since I put oil in the motor, could the rings still need to seat, I did spray some wd-40 in the cylinder before running test. 1275 compression test high. Posted by Berks4x4 . Topic List Forum List Newer Older Start New Topic. 1275 compression test high. #1. . MG/ Triumph Performance Street Engines - Cylinder Head Porting for street performance and race - DIY Engine Rebuild Kits With Free Tech Advice - VTO alloy wheels for British Sports Cars, and others. John Twist briefly walks through how to check MG engine compression on an MGA. Thanks for watching, be sure to subscribe, and Safety Fast!Visit University Mo.
Classic Mini High Compression 1275 piston +.020 | Sold Each. 21253-20-EA. 7.95 Classic Mini High Compression 1275 piston +.040 | Sold Each . Russell Engineering 73mm Dished Piston Set With Pins, Sprite, Mg Midget, Mini. RE-A1117-00. No Longer Available. Russell Engineering 72.5mm Dished Piston Set. 20% Lighter Than Ae Equivalent. RE-A1117 . The MG Experience. www.mgexp.com . MGExp. Sign In; Forums. Forum List; Latest Topics Table; MGB & GT; . 1275 compression. Posted by rhodyspit75 . Page 12. Topic List Forum List Newer Older Start New Topic. 1275 compression . I decided to do a compression test today and number 1 & 4 are at 145 pounds and 2 & 3 are 120. I put oil in .
1275 compression test high. Posted by Berks4x4 . Topic List Forum List Newer Older Start New Topic. 1275 compression test high. #1. . MG/ Triumph Performance Street Engines - Cylinder Head Porting for street performance and race - DIY Engine Rebuild Kits With Free Tech Advice - VTO alloy wheels for British Sports Cars, and others.
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1275 compression test high. Posted by Berks4x4 . Topic List Forum List Newer Older Start New Topic. 1275 compression test high. #1. . MG/ Triumph Performance Street Engines - Cylinder Head Porting for street performance and race - DIY Engine Rebuild Kits With Free Tech Advice - VTO alloy wheels for British Sports Cars, and others. 1275 compression test high. Posted by Berks4x4 . Topic List Forum List Newer Older Start New Topic. 1275 compression test high. #1. . MG/ Triumph Performance Street Engines - Cylinder Head Porting for street performance and race - DIY Engine Rebuild Kits With Free Tech Advice - VTO alloy wheels for British Sports Cars, and others. Page 1 of 2 - 1275 Compression Ratio - posted in Problems, Questions and Technical: hi all, i've got a 93' 1275 carb engine, as you may know these engines run a lower compression ratio than the coopers etc, would i be able to have the head skimmed to raise the comp ratio to a decent level or is it a case that the pistons in my engine are low comp ones? .Introduced 1961 - 1979 Number built - 224843 cars - all versionsThe MG Midget car revived the Midget moniker first seen with MG M Type Midget of the late 1920’s. It was based upon the successful Austin Healey (Frog Eye) Sprite but with significant body changes and similar Sprite versions continued alongside until 1971. During it’s life significant changes occurred including
High compression (9.75:1) performance pistons in +.020, +.040, or +.060" oversize . All our engines are test run with coolant to check for leaks and come with a one year or 12.000 mile warranty . Stock Factory Pushrod For A 1275 , Sprite , Mg Midget , Mini , Morris. Price : .86. Bolt, Spin On Oil Filter Head To Block. Helping a friend out his engine lost compression in number 3 put some oil in the cylinder ran compression test again compression was back to normal. . the stock bore of a 1275 is 2.780", so 2.800 would indeed be .020 over. . MG/ Triumph Performance Street Engines - Cylinder Head Porting for street performance and race - DIY Engine Rebuild . The MG 1275cc engine was an October 1966 redesign of the 803cc Austin A-Series engine that was originally developed for the 1952 Austin A30. . Cylinder compression readings should be somewhere .
My idle shakes pretty good and the exhaust note is not perfectly steady like you would find on other cars. It has new tune up and the weber had been cleaned. Otherwise the engine runs well everywhere else. Just did valves, they were all almost .018" and are all now .012". Engine shook bef What should the compression be in a 74B engine? It is an "L" engine which I always assumed had less compression thatn an "H" engine. I have one of those hand held compression jobbies that screws in the spark plug hole and has a guage with a pressure release button on it. It seemed to work well. A compression test will tell you if your engine has good compression. An engine is essentially a self-powered air pump, so it needs good compression to run efficiently, cleanly and to start easily. As a rule, most engines should have 140 to 160 lbs of cranking compression with no more than 10% difference between any of the cylinders.
I ran a compression test on my 1977 MG Midget. I had 100 psi in 3 of the cylinders and 75 in the other. I don't know what it should be. Do these numbers indicate that I need a valve job? . Any car with a sidedraught, you MUST do the compression test with the throttle WOT. But on the variable choke carbs (Su/Stromberg) this doesn't matter .
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Connect compression gauge to #1 cylinder. Have assistant crank engine (ignition switch—off) through six compression stokes with the throttle wide open. * Needle should jump six times. Record the highest reading. Repeat on other cylinders. Interpretation of Readings (Step 2) The MG factory never published pressure readings for compression checks.
In reply to # 2162583 by horse1936 Gary - This topic bas been covered a lot lately ( See earlier post starting with " breather lines".I am building a 70 1275 as well. From what I can gather, if you gave ditched the smog equipment, you need the Y- tube connection from the carbs to the timing cover and a vent on the valve cover, whether it be the oil cap or the hose .
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Page 2 of 2 - 1275 Compression Ratio - posted in Problems, Questions and Technical: why not give it a compression test with my standard mg metro head on wasaround 195, my mates with the lower compression was about 165the mg metro head and cam or 266 will make it go nicei thought that all of the 940 heads were the same "cc"...around 22-ish i .
John Twist demonstrates the proper method of taking compression readings from an MG engine. Good Morning All..I'm looking for feedback regarding the compression test results on my stock 1275 engine: #1 - 150 #2 - 140 #3 - 145 #4 - 150 Many thanks to this forum as it has led me to a neighbor and fellow MG enthusiast Don Prince who showed If the test light won't "break" look for shorts in the points etc. And an old favourite of mine, shorts in the rotor arm (the new ones have short life) Mk3 Midget 1970/1 UK spec. 1275 GAN5996*** and 2RWA wrecks "The Spice Girls" - "2 become 1"
I should note that this engine has just been rebuilt, has only maybe 30km on it, plus lots of idle time. To check about the blow-by, I did a compression test. 165 across all 4. Hooked up a vacuum gauge to intake, found a significant fluctuation between 15 and 17 inHG. Did a cylinder leakage test, 1 and 4 are good, 2 and 3 leaking between each .
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1275cc compression test results : MG Midget Forum : The MG
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1275 mg compression test|acceptable compression 1275 : MG Midget Forum : The MG