raising the limiter wont help without going into the head of the engine anyway. Any of the fe heads with toyotas arent designed to rev high. they are designed for good emissions and low end torque to make your grandmother proud. Raising the limit, if a rod doesnt end up poking through the block, will just net slower acceleration and more noise.

Same goes for the old camry 4 cylinder, the 5sfe, same motor thats in my MR2. I shift at 5500...because thats where the ideal shift point is.