What would be the best starter/basic bolt on performance mods for a 4BT?
Things that can be done before dropping the engine in or after it's in.
I'm thinking a custom 3" exhaust with a Magnaflow muffler, Pyrometer and Boost Gauges, also thinking of a turbo timer. Just read fitty's write up on tuning the pump.
A good free flowing exhaust is a must if you are going to "bomb" the engine. Guages are also a must. You can gain quite a bit of a performance boost by turning up the pump, installing a 3200 rpm spring, and advancing the timing.
Depending on what you want, performance wise, you might want different injectors, and more air.( turbo upgrade, and intercooler, larger diameter intake plumbing)
Mine has a 3500 rpm spring (aftermarket), New Era Diesel 370 injectors, turned up pump with custom fuel pin, 7.3 Powerstroke IC, HE351 turbo, 3" intake plumbing, 4" exhaust from turbo back with Magnaflow 30" long stainless muffler, 60 lb. valve springs. Guages-Autometer Ultralite II-pyrometer, boost, tach, oil pressure, coolant temp, oil temp. Clutch is a Centerforce Ceramic puck type. Don't have Dyno results yet, but will post when I get them.
I don't think you really need a turbo timer though. Just keep your foot out of for a couple of minutes before you turn it off. Can't hurt though.
Bob B.