by the time I started making good power and making 12 more would have been very possible without any more tuning. But I would think that once I had good airflow over the IC's, I could have squeezed a couple more degrees of timing out for another ~10HP gain to put me at 500FWHP... With that and aquamist, I should be able to hit 420's. Add in the S14 IC's and make another 10 for 430RWHP.