What all do I need to be aware of when building up my '06 Mustang GT to 800-900 HP?

I drive an '06 Ford Mustang GT 4.6L. I'm by no means an automotive expert. I'm somewhat new to the hobby but am learning all that I can and have a lot of experienced friends to guide me. My current issue is that I don't know what the whole drive assembly (Axels, driveshaft, ect.) are rated at stock. I don't know if they will fail or break apart when my car hits those high levels of power.

I currently have it supercharged with a Kenne Bell 2.6L V3 Model TS pushing 8.5 Lbs of boost. I already know how to hit 800 HP by kicking up the boost to 19 lbs, replacing the engine internals with forged components and getting a new set of cams.

So my questions are what are the drive assembly (I'm sorry I don't know what its called, the axels, driveshaft ect. Basically anything that can break under extreme power) rated at? Can the stock components handle 800 HP? My second question is will the engine block be able to contain everything without cracking or otherwise breaking?

You're already running more boost than is recommended for a stock 3 valve 4.6L. The aluminum 3 valve 4.6L block is good for around 700 HP, any more than that and you'll probably have to get the cylinders sleeved.

" Can the stock components handle 800 HP?"

Hell no, you'll need a new transmission, the stock TR-3650 will not handle that kind of power, nor will the stock clutch. You'll probably want to look into the carbon fiber driveshaft from a later GT500. The rear axle can be rebuilt to handle that much power, but you may want to consider a 9 inch swap.

Getting a 3 valve 4.6L to 800-900 HP is probably not a realistic goal. People who are making that kind of power usually start off with an 03/04 Cobra 4 valve 4.6L or start off with a FRPP alluminator block. Or most commonly a 5.4L-5.8L GT500 block. Either one of those would be easy and cheaper to get to 800-900 HP.

No offense, but you're already treading on thin ice by running 8.5 pounds of boost on an engine with cast internals Sounds like you have more money than knowledge, a dangerous combination.

That STRENGTH is very important. Especially connecting rods and crankshaft.

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