[N719SG]

Originally Posted by Gunmetal Speedster

Correction- as long as you buy the SCTx4 tuner from him (or any tuner I'm assuming) he will provide you with free tune updates for life, not just if you buy the parts from him. That's what sets him apart from Janetty in my book. Example: if you bought headers and needed a tune, Janetty would only provide you a free tune if you bought the headers from him. Whereas DynoSteve would provide you with a free tune regardless of where you purchased the headers as long as you bought the initial tuner from him. Pretty sure anyway. That's what makes DynoSteve so great, among many other of his great qualities.

As far as OP, people notice a night/day difference in the L99 tune from him regardless because of the aggressive transmission shifts. Even if you weren't adding a power mod, you would notice a huge difference from that part of the tune alone. As far as how much rwhp you will be making, that depends on several factors. Take a look at those who have a similar set up as you and base your gains off of that. It's really the only way to have a good idea without dynoing it. Every car is a little different from the factory to what they put down stock. Every dyno will read a bit differently too. Especially if you're comparing a mustang dyno to dynojet. So there isn't really a clear way of knowing until you get it on one. Until then, just assume you're making close to what others with similar mods are

Yep that's the way I understood it