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Message: [QUOTE="Ipkyss, post: 110438, member: 1737"] Spartan 250,275,300,310,350. Same results on all the tunes only I don't expect to see over 50 psi on the 250. I have had the regulator set up every way you can. After the other wastegate thread. I was positive the valve seat was missing. When I took it apart today and it was there, I was like wtf. This afternoon with no wastegate. The 275 was making 54psi almost smoke free running perfect. If the higher back pressure blows something up. I'll build it better next time around... The truck was seeing 71+ psi actual BP with the cold weather 310 issue. There was no valve train damage when the motor came apart the last time. [/QUOTE]

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