That car made 400+ on a built motor and AEM. That's a different ball game

There was a user here, not sure if he still is (soon2bevo)? or something like that...put down 378/386 on pump(93) 25psi in decent weather with his stock 8 turbo. This was done years ago tuned by Al, his combination of parts really worked, I remember people trying to shoot for those numbers.

The stock 8 turbo can be pushed to 25psi on pump93, without running out of efficiency?

Well you said "never" so i just pointed out thats its been done before. It's hardly a built motor, it was "built" with used internals and stock bore, stock compression iirc. And you can buy an aem setup for around $1k(used prices) which is the same cost of some aftermarket intake manifolds, exhaust manifolds, ti exhaust etc, so its not really out of the budget of most people.

I'm talking stock block on pump gas you will not see 400whp on a stock 9 turbo. Who cares if the rods and pistons were "used". That means nothing. They can take far more abuse and have more resistance to knock then the stockers.

NEVER say never...

stock compression setup, so I don't think it makes much of difference it was done with upgraded pistons...

I'd say go ahead and get a IX turbo, you will be able to get very good gains without spending too much... search around a bit for results and graphs on setups with IX turbo's and you'll find some great results

I went ahead and got the Evo9 turbo off another member here. I'll report back with results in just the turbo swap.

if your going from an 8 to a 9 you are gong to make more power period. its a larger turbo. anyone who says its worthless to upgrade from an 8 to a 9 is ignorant and simply stating their opinion. all of the great stock turbo times are done on the 9 turbo for a reason.. its very capable of making significant power over the 8s.

know plenty of people making around 375whp on a mustang dyno with evo9 turbo, so yeah the evo9 turbo doesnt fall flat on its face as quick as the 8 thats the difference. Is 400 whp achievable? yes...use some cams and every bolt on possible....if you want to run high 11's and your satissfied with that then evo 9 turbo is the way to go PERIOD..

This is by far the most erraneous thing said in the thread.
High 11s.. are you kidding me?. I run high 11s with a stock 03 8 turbo with nothing more then an exhaust and e85 tune. The 9 turbo can go much deeper then a high 11.. your obviously very busy posting stupid comments, if you took the time to research before you post you would know this.

for the record its not a bigger turbo as far as wheels go. the compressor and turbine wheels are exactly the same as a 8 turbo. but. the ix has a larger compressor COVER.
this is what gives the ix the edge. where the 8 would be out of puff after 6k, boost will more than likely be falling or just getting hot. the ix will hold boost after 6k and still be efficient. its not that much of a bigger/better turbo than a 8 so any real gains must come from more boost. running the same boost is going to be very very small gains

its a huge difference. the compression ratio doesnt matter if it was stock or not. i guess people dont realize how much further you can push the motor on upgraded pistons and rods

Joe, i made 402 on pump with my old setup on ISP's dynojet.. its doable.