Upgrade HDD to SSD (Do i need to re-install?)

Question

I just bought an SSD (Samsung 470 series is the one thats best with MBP right?) and i want to replace it with the stock HDD that came with my 2011 MBP 13".
What if i upgrade RAM from 4GB to 8GB and transfer from HDD to SSD by carbon copy cloner. Do i need to re-install Lion then?
Is TRIM automatically enabled if i transfer from HDD to SSD?

Answer 1

Upgrading the RAM is fine by itself. Just know you only have two slots, and thus need matching pairs of 4GB modules to increase the RAM from 4GB to 8GB. If you have $900, OtherWorld Computing has 16GB of RAM (two 8GB modules) for sale. (no compensation)
Use the online Crucial checker and MacTracker to make sure your getting the correct specs of the RAM (and the amount of modules) before purchasing.
What you need to do is use the free to use (donations accepted) Carbon Copy Cloner on the HDD while it's still in the machine, clone to a external powered drive and hold option to boot from it, test it out that it works.
Then make the HDD to SSD switch and option boot from the clone again, format the SSD HFS+ Journaled and use CCC to clone it onto the SSD.
OtherWorld Computing and iFixit has videos, pictures, instructions and tools needed.
When you clone, it clones the OS X partition only, not both your OS X partition and the Lion Recovery Partition, which in your case is unnecessary to have if you have a "hold option" bootable clone. (should keep two at times)
If you need to download Lion installer again, simply use MacAppStore and hold option and click on Purchases, either in Lion or Snow Leopard and then make a couple of " hold c" bootable DVD's from these instructions.
http://www.eggfreckles.net/notes/burning-a-lion-boot-disc/
These DVD's made from these instructions contain the full OS X Lion, not a Recovery Lion disk or the Lion Recovery Partition which Apple provides a download for and requires a lengthily Internet connection to download Lion before it's installed.
Far as setting the TRIM, I don't know about that. Hopefully someone else will answer.
If not ask Dave (Bmer) over here:
http://macosg.com/
He replaced his hard drive with a OCZ Vertex, the fastest SSD's on the planet and also his Superdrive with a 7,200 RPM 750GB drive for storage (note: you can't boot from a Lion/Snow/Windows DVD from a external optical drive) so he would know best what to do.
Also OCZ just came out with a 480 gb or so very fast SSD, the Vertex 3 series, just as fast as the smaller SSD's but with more storage capacity, so that would be worth checking into. (smaller SSD's are faster, larger older ones are just a bit faster than a regular hard drive)
Also check out your Mac model's SATA number using the fre MacTracker and System Profiler, this way you can by the right SSD for the price and know your bus speed limitation accessing the SSD.
Good luck.