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Message: <blockquote data-quote="the.greg" data-source="post: 1106804" data-attributes="member: 11226">Check out my build thread. I have a ton of info on the 1.5kb 4v. Another item you will "need" is a ford lightning iat sensor to be drilled and tapped into the kb intake manifold. This will allow the computer to accurately pull timing when it heatsoaks as it is post-blower unlike the stock iat sensor which is pre-blower obviously. 6psi is a waste, go 8psi or if you add meth go even more. I strongly recommend 93octane fuel as well for detonation prevention! No way to intercool a kb on a b head except for the one guy on svtp that had a custom made one, except he vanished all of a sudden(most likely his blew up, it was weak sauce). I recommend chemically intercooling it meth. This is why the 2v kb guys make more power than 4v b head kb guys, they have intercooling, we don't. Its not necessarily lack of airflow, but on a dyno it heats up by the time the tuner can make the tune. I strongly believe I'm pushing 400rwhp on a nice cool day, with a cool engine, but heatsoaked 3rd pull on a summer day I made 371/352. Regardless its really fun for a street car, but they make lousy 1/4 mile cars because of the heat soak issues they will never be consistent.</blockquote>