Hi there OP and from all of us here at the forums, Welcome to Bluelight! We're always happy to have new members. If you're curious about your specific variety of Tramadol, you should be able to easily discern whether they are controlled-release or not by Googling the imprint on the pill. We don't do pill-identification as a primary function on Bluelight, but it you are seriously desperate, I have no problem with reading the imprint and providing you with this information, as it could be important.
At any rate though, by crushing these pills, they are going to be made effectively into an instant-release product. With this information in mind, you just don't want to exceed 300mg in a sitting. You could use less or use more, but this is the generally recognized threshold in which the risk of seizures becomes much more pronounced. Given the fact that you are fairly naive to Opioids, I think a starting dose of 150mg should be ample. If you decide you would like to escalate the dosage, you could do so after about an hour, but still, don't exceed the 300mg mark.