if u get a good tune, then u wont blow the ringlands, simple.
What us sa guys have been disussin is that one major problem of engine failure comes when the stock injectors are pushed too far, and hence put out an uneven spray. This can cause the ringlands to go at higher outputs.
Steve on these forums was speaking to one of the mechanics of the D1 drivers i believe whilst they wer down for drift nats. Anyway according to them, they tune to 11.1arfs, with heaps of advance igntion timing. Hey they know what they are doing.
In other words, keep the afrs safe, below 12, and the stock internals should stay fine if u r nice to them. Steve has 310rwkws with stock internals.