The big benefit of just buying a hellcat is that you're paying for a design of all parts that are planned to work well together instead of increasing engine horsepower and torque then hoping for the best. I would absolutely recommend upgrading to something similar to the hellcat's 265 or 275 if you're not on something like that already, I forget which size they are. If you're not doing hard launches you're probably ok here. The modern Dodge diffs are generally pretty decent but 600-700hp is no joke.Īxles. More likely to break an axle than the driveshaft.ĭifferential. From what I've read it'll usually handle more than the axles can take. Don't quote me on that - do some searching yourself to confirm. I want to say I read that the 8 speed auto generally can tolerate up to 600hp. It also opens the consideration to stick with stock displacement or go ahead with a stroker kit. Install = motor rebuild so the labor is significant. Forged kits will run something like $1500 give or take. How much can the stock internals handle before they melt? I can't remember the exact compression of the 392 but it's something like 10.5:1. Install will be ontop of that of course.įorged internals. Supercharger kit will range from $6k-$8k. But off top of my head you'd want to be looking at: I haven't done a ton of research/forum crawling to see what the guys boosting their 392s are running up against.
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