[Formula94lt1]

Hey Illumina the amount of boost before an intercooler is "needed" is TOTALLY a case by case thing. Depending on compression, timing, chamber design, octane, turbo compressor map and quench area the amount of boost you can safely run un-intercooled can vary quite a bit from application to application. If anything it will add power and it will be safer under boost at the cost of, well, being a possible pain to plumb everything up/ more system complexity. I wouldn't use just one 300zx intercooler if one 3.0 turbo car needed 2 of them, especially considering most stock stuff is fairly restrictive. I know you bought a turbo already but a really good one would be an HX35 off a cummins, some 5.0 ford guys use them and they say they are a bit on the small side for a higher revving 5.0 so I figure it would work VERY well on a 4.9 in its power range. BTW a diesel turbo usually has a large turbine housing compared to its compressor housing since diesel's apperently have more exhasut energy than gas engines so thats something to consider when using a diesel tubo on a gas engine. If nothing else before ensuing any further into the project get the most helpful turbo book EVER in existance by Corky Bell "Maximum Boost" I found it EXtremely helpful. Good luck....