The radar gun was turned off at First Data Field. So much for that data.

For Matt Harvey, it’s not about speed right now. He believes that will come. Tim Tebow was the sideshow. Matt Harvey was the main attraction Friday.

Scouts registered Harvey’s fastball at 91-92 in the first inning and he did reach 93 in his three innings of work, but regaining velocity is one of the challenges following thoracic outlet syndrome surgery.

It’s just the way it is, and Harvey has come to grips with it — for now.

“It’s better, definitely an improvement from the first one,’’ Harvey said of his second spring start. He gave up a long home run to lefty swinging Reid Brignac, the Astros No. 8 hitter in the third inning of Houston’s 7-6 win.

“I think it’s just a matter of time before things click and mechanics click and the timing clicks,’’ said Harvey, who allowed that one run and two hits, one walk and two strikeouts over his three innings.

The Dark Knight needs to be more of a pitcher than just a superhero blazing fastball like he once was — that’s just the way it is these days and Harvey seems to have the right approach that is needed at this early stage of his second surgery comeback.

“Getting out there, getting comfortable. I threw some good sliders, I threw some good changeups, obviously the fastball was up in the zone a little bit early, but then in the outing it was starting to come back down and I was starting to figure out the timing a little better,’’ Harvey said.

As for his stiff neck he said, it was “90 percent better than it was before.’’

Manager Terry Collins said he was encouraged.

“I liked a lot of what I saw,’’ Collins said. “I liked the changeup today, he had some life on his fastball. He’s getting his strength back, we need to get his release point down so he gets his command.’’