Quote:
Originally Posted by sport the war
I'm getting conflicting info on the fuel systems, are they capable of supporting the max the stock turbo can handle? With the X, how strong are the internals? They use a semi closed deck with sleeves unlike the caliber block isn't it? How strong are the sleeves? Internals stout or suspect?
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The stock fuel system is capable of supporting basic bolt-ons (intake, exhaust, intercooler, etc.) with pump gas, once you get into the more specialized bolt-ons such as ported manifolds, throttle body, etc. you'll need to upgrade the fuel pump. The stock injectors are fine for any stock turbo/pump gas setup though. 343whp on a Mustang dyno was the limit of my stock fuel pump; after that I had to upgrade to a Walbro 255HP. I didn't touch my injectors until I upgraded the turbo.
The internals are fine, the weak point seems to be the rods just like the 4G63. 400-450whp (Mustang) is generally regarded as "safe" on the stock block with proper tuning. A bad tuner can blow up an engine at any power level though. A local here has hit a max of 466whp and his stock block is still holding together (~55k miles on it so far), he's actually going in for an E85 retune this week and I expect him to hit 480+.
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