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anyone of you guys know if the fuel pressure regulator is a 5bar on the 225 TT

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Old 01-07-2002, 05:14 PM
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Default anyone of you guys know if the fuel pressure regulator is a 5bar on the 225 TT
Any help would be appreciated
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Old 01-07-2002, 05:55 PM
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No it is not. It is 4 bar. Mike bought a 5 bar for his 225.
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Old 01-07-2002, 06:37 PM
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where did he get the 5bar FPR if you know? I need to order onw right now.
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Old 01-07-2002, 07:02 PM
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Default Here ya go. I ran too rich with it.
<ul><li><a href="http://www.machvw.com/5barfuelpres.html">http://www.machvw.com/5barfuelpres.html</a</li></ul>
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Old 01-07-2002, 07:08 PM
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Default Thanks a lot. I need it for a new turbo until I can get some larger injectors.
I will just turn down the boost with the 5 bar until I get the 440cc injectors.
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Old 01-07-2002, 07:17 PM
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Default 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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Old 01-08-2002, 05:12 AM
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How are you recaling so you are not too rich at lower/off boost areas? Recal MAF for diff injectors?
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Old 01-08-2002, 01:29 PM
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Default 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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