anyone of you guys know if the fuel pressure regulator is a 5bar on the 225 TT
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4 bar absolute or 4 bar relative to manifold pressure? John says the regulator on the 225....
regulates fuel pressure to 3-bars above the manifold pressure if I'm not mistaken. So if the manifold pressure is about 1-atm then it would make it a 4-bar (absolute) regulator.
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Stock is 358cc @ 3 bar, that's 462cc @ 5 bar, good idea to keep boost low.
Stock turbo chipped will produce 2.5 bar absolute pressure so with 5 bar regulator you're asking pump to keep up with flow rate at 7.5 bar, that's a lot for the stock pump.
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