This evergreen was on BG's old site. Maybe he can comment it.
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*Mitsu turbo/stock motor*
I believe the 20g setup is as big as you -should- go on the stock injectors. It is a good turbo to bolt on if your stocker is dead, you want the stock look, or you just want a bit more turbo. I recommend the 20g with 10cm2 housing for those who want VERY stock drivability, on stock converter. The 20g with 14cm2 has a bit of lag with a stock converter, where a stall converter would make that large housing a bit more responsive on the bottom end. The 12cm2 housing is difficult to obtain, and I believe it requires machining to fit. I found a source for the 12cm2 housings, and they are expensive.
*small Garrett/stock motor*
Past the Mitsu point, the Garret turbos are hard to beat. Lots of combinations available. If you want to use a stock converter, the TE44 is best, with a 60 series working OK if you have a low restriction exhaust, and a well tuned truck. You may be able to run well with a 44 series turbo & stock injectors if you don't run big boost. Many have run good numbers with stock injectors on larger turbos, but that is dangerous in my book, and the high octane being run is what allows those engines to live. For the PTE turbos, their housing is a high flow one, with a bit slower spool than regular 3 bolt housings that the ATR setups come with. I am guessing that a PTE44 will work on a well tuned truck on a stock converter & low restriction exhaust. If you have a stall, or are planning one, and want the most out of a turbo, the PTE51 may be the turbo for you. Don't get caught up in the bigger is better game. Responsiveness and bottom end spool are *very* important. The 44 has gone mid/high 11s in Buicks, and the 51 has gone low 11s in Buicks. If you are planning future mods and have a stall converter, or willing to sacrifice some drivability etc, a TE62 or PTE52 may fit your plans on your current stock motor. Stock intercooler with modifications (pump, 3/4" heater hose, aux. heat exchangers) should really be done before any turbo upgrades IMHO. I believe you will make good gains going to a larger IC once you go to a Garrett based turbo....
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