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sentra532 07-01-2002, 02:37 AM Sorry if this has been asked before. Im not good with doin archive searches (OK im also lazy). Do ALL JDM SR20DE's (Japanese manifold with NO EGR) have 9.5:1 compression??? Stock US is 8.5:1 right? Thanx in advance for answering my dumbass Q. playatx99 07-01-2002, 03:20 AM stock USDM SR20 compression is 9.5:1, while SOME JDM primera motors are 10:1, 8.5:1 is the bluebird/avenir SR20DET, IIRC sentra532 07-01-2002, 11:46 AM I see.... any easy way to tell if your JDM is 10:1 or not? *crosses fingers* :D NismoSER 07-01-2002, 01:56 PM not by looking on the outside. if there is, nobody is willing to share that info. see my post under the general section. . . FastNX 07-02-2002, 12:50 AM I think you can identify the 10:1 primera motors by their tubular headers....someone correct me if im wrong mpg9999 07-08-2002, 11:21 AM apparently you can look through the plug wells at the pistons to tell. There is another post somewhere around here (I think in the general forum) that has a picture of what to look for. sentra532 07-08-2002, 02:26 PM There's been a general consensus that you can't tell just by lookin' down plug hole with a flashlight. I know I wasn't. sentra532 07-08-2002, 02:27 PM Check the other forums on some posts about using coat hanger wires as a feeler... | ||