ok, heres the deal. i want to buy a jdm 10:1 sr20de. the place i might buy from says they did leakdown/compression tests on the motors. They also said that they "were told they were 10:1 compression motors" yeah right, like im going to beleive that. my question is, since they said they did compression tests, and i ask what the results were, wouldnt the 10:1's be in general higher than the 9.5:1's. that is, granted they were all lower mileage specimens. does any one know what compression the 10:1's should be compared to the 9.5:1's so i know if im getting a true 10:1 compression motor?


Please help me! im stupid!

thanks

Since the motor is not in a car, I can't see how they'll get an accurate compression number on the motor. The FSM specifies the test to be done on a hot motor.

Chris

This si all true. they must have gotten the numbers from their suppliers-if they got them at all. And a person-or conpany for that matter to beleive these numbers and tell cusyomers the engines are leakdown/compressionm tested is wrong. leakdown and compression testing amotor does not mean it's in good shape. what the numbers ARE is what makes/breaks a motor.

Call Andreas... he knows.

the compression and leakdown numbers are a decent reference to be taken with a grain of salt so to speak. if all used engines are tested there would be some pattern of test result for such imported engines which cannot really be compared to a warm engine that actuall has al the surfaces propperly lubricated. many shops/importers do these tests. take them for what they are worth. i certainly wouldn't say they are useless. these test can also show a serious unforseen problem that keeps the shop/importer from buying them in the first place. which means you most likely arent going to get an engine with bent valves or something or that nature. it is an assurance of some basic quality.