just got in the forge 007 piston dv, hoping it will solve my lost boost issue. got it from ttstuff so it came with a couple shims and the blue and yellow springs. i am unchipped, so can I just use whatever the default spring in there is? thanks

 

Yes, I believe that the stock spring in there is the red one. That is the best spring for unchipped cars. After you get it chipped a shim should do the trick. Im not sure what PSI the other springs are set for.

 

yellow is the chipped spring.

 

green is the stock spring! yellow with one shim is what i run...i might try 2 shims next

 

the 180 was running a green spring, 2 shims, on the APR 93oct. chip.

 

i replaced the dv because i wasnt getting the boost i expected to see, i have an 01 225q and am only seeing it hold 5psi and spike to 10-11psi. the forge dv def made some difference in spool time and boost recovery, but it didnt change the max boost i saw, so i assume i have a leak somewhere. i know i couldve flipped the bosch dv(thanks cicny) but i know i want to chip it later so i replaced the dv anyways in case that was the issue, apparently its not. i dont have a compressor so i dont know that ican check for leaks that way, other reccomendations? thanks.

 

buy/build a pressure tester, and take it somewhere that does have a compressor.

hell, a gas station would work...

 

I just swapped the green (one it shipped with installed) for the yellow no shims, and it definitely helped, it still wont go over 10-11 psi, but it will hold there under WOT and keep 7psi when it was giving me 5 before. Would like to get the APR 93 after I get the strut bearing/bushings replaced, if this boost situation sounds normal for an unchipped 225.

 

That sounds low for a 225. Pretty sure you should be 3-5psi higher. I don't currently have a boost gauge, so I can't tell you definate readings, but the numbers you're posting are as low, or lower than I remember for my 180 before it was chipped.

 

those numbers are correct for the stock 225