I have B16AG1 Engine in my car.So far I modified Intake,header and Exhaust. For electricity I installed MSD SCI Ignition,Crane cams PS91 coil and Spoon sport spark plug wires. Also I have a fuel regulator set on 4.2 Kg/cm2. My question is how big I should gap my spark plug to get the best performance. I use denso iridium IK20. Thanks.

 

Stock gap should be all you need.

 

Keep it at the stock gap. The only time you would need to close it down a little would be on a turbo application with high boost and no upgrades to the ignition system.

 

Thanks guys for the help.My Engine is from 1989 JDM Integra Xsi (B16A),just wondering this engine is exactly the same as what USDM Honda car? And one more thing what is the correct sprkplug gap for this engine? Thanks.

 

Being that the b16 wasn't offered in a car in the usa until the del sol vtec came out, I'm going to say NO it's not exactly the same as whats offered in the usdm equivulent. If you would like to know the differences between the non-obd, obd-1, and obd-2 b16a please do a seach that topic has been covered a million times. As far as the gap goes, I believe stock is .042