Vortech supercharger pulley size - Mustang Evolution

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Old 09-01-2015, 10:46 AM   #1
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Vortech supercharger pulley size

So my car is completely stock aside from a vortech v2 supercharger, kenne bell boost-a-pump, cold air intake, h-pipe and pro chamber mufflers.

I believe my pulley is around 3.5". Can I safely put a smaller pulley on this car without worry that I will damage the motor or supercharger? I do NOT have an intercooler on this car either.

I've heard some say that the 2003 GT engine can only take 400 hp at the crank before its close to running a rod through the block. I also heard that without an intercooler, you shouldn't run too much boost.

What kind of hp gains would I see from utilizing a 3.13 pulley?

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Old 09-02-2015, 08:38 AM   #2
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You need to figure out exactly what pulley is on there now for one...

Two is that you need to make sure you are running a stock crank pulley to make sure you are actually going to run the boost number you want.

Third is, get with a tuner and talk to them. You can't just toss a new pulley on without a tune anyway and a good tuner will be able to recommend a correct pulley size based on your mods and desired power level. Non-intercooled should be limited to 6-8 psi anyway.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
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