looking for recommendation on fast spool turbo
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From: twin cities
Good question on what your current A/R turbine housing size is. My go-to is 0.82 A/R. The 1.06 is too big and costing you ~200-300rpm of spool. But I would still drop down to the GTX3071R in the 0.82 A/R turbine housing.
G-series is a badass turbo, but would also require a change to the turbo kit setup as the G-series uses a v-band inlet on the turbine housing. The GTX3071R would be nearly a drop-in replacement with the only difference being a slight difference in compressor housing outlet location. But that can easily be taken up by the flex in the IC piping. The G-series is really a motorsport turbo too, so the extra cost may not be worth it for a primarily street driven car. Well, unless one must have the absolute best
G-series is a badass turbo, but would also require a change to the turbo kit setup as the G-series uses a v-band inlet on the turbine housing. The GTX3071R would be nearly a drop-in replacement with the only difference being a slight difference in compressor housing outlet location. But that can easily be taken up by the flex in the IC piping. The G-series is really a motorsport turbo too, so the extra cost may not be worth it for a primarily street driven car. Well, unless one must have the absolute best
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Yes, the turbos are in the same ballpark for price. But you'll have to spend extra money redoing your exhaust manifold to go from T3 flange to V-band used on the G-series. You can probably keep the same downpipe; the fabrication just has to be precise in the positioning of the new v-band flange to have the turbine outlet of the G-series line up with the downpipe location
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From: twin cities
Yes, the turbos are in the same ballpark for price. But you'll have to spend extra money redoing your exhaust manifold to go from T3 flange to V-band used on the G-series. You can probably keep the same downpipe; the fabrication just has to be precise in the positioning of the new v-band flange to have the turbine outlet of the G-series line up with the downpipe location
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From: Norfolk
I'm just letting you know that a turbo with a smaller turbine housing, although good for improving response can result in different (more catastrophic) problems without supporting modifications (i.e. changing the exhaust valves for something designed to take the heat of turbocharging). As good as the F20/F22 engine is, it was designed to be NA, so once you get to the limit of certain parts they can fail in a way that destroys the entire engine - a dropped valve being common on turbo S2000s where the limits are being pushed.
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Mid range is significantly improved. That is with a turbo that is probably a little too oversized as well, you can make a ton more power down low/mid with a slightly smaller one. Again, why would you brag about an NA power band on a turbo car lol?
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From: twin cities