5.3 bore need help?
#1
5.3 bore need help?
Im a newby to engine building im currently going to school to become a tech. I was wondering what is the most i could bore out of a 5.3 block. I want to turbo that block. thanks
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The MAX that a 5.3 cam be bored out to is 3.905", but have the block sonic checked. That bore with a 4" stroke will yeid 383 cu in. kmtrider did exactly this setup.
A 408 is a 6.0 bored .030 over with a 4" stroke
A 408 is a 6.0 bored .030 over with a 4" stroke
#7
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Hello Silverado tur, I would say the max bore on the 4.8/5.3 blocks ( same block and bore ) is 3.905" from the stock 3.78". My min thickness after the bore was sonic checked to 0.157". Came up to 383ci or 6.3L.
The truck runs cooler than it did with the standard bore size and I have had no issues with leaks or detonation. Lots more 4.8/5.3 engines out there for cheap compared to the 6.0L models.
The 408ci motor is the 6.0L block bored out 0.040" ( stock bore is 4.00" ). Other popular one is the 402ci, again the 6.0L bored out 0.030".
The truck runs cooler than it did with the standard bore size and I have had no issues with leaks or detonation. Lots more 4.8/5.3 engines out there for cheap compared to the 6.0L models.
The 408ci motor is the 6.0L block bored out 0.040" ( stock bore is 4.00" ). Other popular one is the 402ci, again the 6.0L bored out 0.030".
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