Should you be able to? Probably yes. At one time I would have sworn my old NA wouldn't lock the brakes. Then I had a friend co-drive at one of our club autox events. He locked them up multiple times. The truth was I had just so conditioned myself to smooth application of the brakes, I just wasn't hitting them hard enough even with what I thought was "aggressive" braking.
I have raced a Spec Miata (NA) including a win, and I can assure you that you can lock the brakes. In fact not locking them was the most difficult part of adapting my driving coming from Spec Racer Renault.
A sliding tire loses traction and leaves some rubber on the pavement.
I bought a '95 Miata base M5 a few months ago. Braking feel during the test drive was... lacking. My wife driving said the brakes were gone and not working. We switched places and I did a little quick stop and got it to lock up immediately (pushing mightily hard by today's standards.) No big deal, though. Weeks later I noticed about an inch of different fluid in the master cylinder. I guess that was water? After I bled them the brake pedal was firmer-feeling, but still nothing near today's brake feel.
My point is, if stock rotors & pads and horrific brake fluid contamination can squeal the tires when stopping, then I think you have a problem. I don't know the answer, but I doubt what you are describing is normal, especially after what you've done to it. Just my 2 cents.
The only cars i've ever driven that i couldn't lock up the front (street) tires in had something wrong with the brakes.
You'll need to log in to post.
