Duder
Watch it man, there's a beverage here!
- Joined
- Dec 9, 2009
- Location
- Torrance, CA USA
You can't go wrong with a 28 on a Redblock from what I've seen. I guess considering your stated use case and preference of stoplight-to-stoplight performance, you might prefer the 28 actually. ATP isn't wrong; they are using their massive experience to help guide your decision. Again a 3067 would be optimal but those are only available as a GTX; more expensive.
I remember talking with a 1.6 Miata guy at SEMA when the 3067 first came out - he did a proper twin scroll setup with fully divided wastegates and said that response and spool-up was massively improved over the smaller GT28 he had on the engine before. For a budget-minded setup with single scroll and lots of wastegate & turbine housing options, 2871 is a good choice.
The other factor is the turbine blade design on the 28 is a bit better than the 30, so it makes up for some of the gains you'd get with a larger wheel if it was apples to apples.
I remember talking with a 1.6 Miata guy at SEMA when the 3067 first came out - he did a proper twin scroll setup with fully divided wastegates and said that response and spool-up was massively improved over the smaller GT28 he had on the engine before. For a budget-minded setup with single scroll and lots of wastegate & turbine housing options, 2871 is a good choice.
The other factor is the turbine blade design on the 28 is a bit better than the 30, so it makes up for some of the gains you'd get with a larger wheel if it was apples to apples.