strange noises

A

Anonymous

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Guys i need your help on 2 noises my cars making.
1st is a nocking noises especially when i turn the car hard. I was told by nissan that my subframe was ripping away from the chassis. Rich at Powerstation said that th subframe is bolted on so again im confused.
2nd is since ive got the car back from powerstation and had it tuned(full system, hks induction, uprated fuel pump, bleed setting to 1 bar got 288BHP!!!) everytime i boot it only in 1st gear when it gets to 5-6000 revs its screaches. ive been told it could be my dump valve. My dump valve is a collins one and its always been shit ie makes hardly any noise. All you can hear is the actuater flutter really load which sounds really good but i want that whooooosh noise. i was told that the spring may be f*+ked and now because of the high boost it is making that screaching noise. anyone got any ideas? ill be at the reading meet next month so please let me know your thoughts my reg is H187 JLD :D
 
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