Small Aircraft; Low Wing; 1 Eng; Retractable Gear
Flight Crew Commercial; Flight Crew Instrument
Flight Crew Last 90 Days 18; Flight Crew Total 2750; Flight Crew Type 2000
Situational Awareness; Time Pressure
Airspace Violation All Types; Conflict NMAC; Deviation - Altitude Overshoot
Flight Crew Took Evasive Action; Flight Crew Returned To Clearance
Environment - Non Weather Related
I took off from San Carlos Airport; Bay Meadows departure.  Normal climb out to the Pacific Coast; and I had just leveled off at 3;700 to stay under the San Francisco Class B airspace that starts at 4;000 feet in that area. No sooner than I was level; both my Garmin GTN 750; and Garmin 650 (both driven by a Garmin GDL 88 TIS B for Traffic) lit up for a traffic conflict. I switched the GTN 650 to the 2 mile ring display; and saw that another aircraft was in direct conflict with my airplane. That aircraft was moving very fast relative to me; and if I did not take some evasive action; it was absolutely apparent that a mid-air was probable. That aircraft display was showing him to be 100 to 200 feet below me. The convergence was so fast that I had very little time to fully analyze the complete picture; but I needed to make a change in altitude and direction NOW. I immediately went to full throttle and climbed at my maximum rate of climb until I could see from the traffic displays that he had passed virtually directly under me; at a separation of about 400 to 500 feet. For the moment I kept climbing until I was absolutely sure that he had passed under me. I never did see that aircraft visually. In the process of evading the threat; I had climbed to 4;100 feet; or 100 feet into the SFO Class B airspace. I immediately descended back down to my previous 3;700 foot altitude. I regard my (minor) intrusion into the Class B airspace as necessary for safety.  I am convinced that had I not climbed away from the converging aircraft; a midair was all too likely.  I am also glad that I spent a very considerable amount of money rebuilding my avionics to include the GTN 750/GTN 650/GDL 88 equipment.  The traffic warnings alone are worth the price. In the last several months; I have 'seen' traffic via the avionics that I have not seen at all; or only when very close via 'eyeballs'.
A pilot departed SQL West bound; climbed to 3;700 feet and there took evasive action from GTN 750/650 TIS alerted traffic 400 feet below. During the climb he momentarily entered SFO Class B.