I upgraded to the X47. I am currently having knock issues (knocks with 7deg less timing than before turbo swap, currently on just the 1st revision of tune) and in addition looking at the vdyno the boost pressure has a oscillation at the top end. One thing about the new turbo is that the barb for the pressure line coming out of the turbo outlet is straight instead of at a 90degree like the stocker. This is putting a sharpish bend in the pressure line. I have mocked up what it looks like in Red in the photo, pressure spots in yellow.
I have replaced the line using some 3/8" fuel line from Napa (rated 50psi on the tube) I was going to use their vacuum lines but they couldn't tell me what PSI they can run at. Does anyone see any future problems using this product? (heat?) Would vacuum line be better? (I bought some just in case). Also I just did this last night, have not done a log yet to see the result.
Anyone have any thoughts to my other symptoms?
* I changed out from stock plugs to the colder plugs everyone recommends (and gaped them myself) - No change
* I use Costco 92 Octane gas (always have) Figured bad tank. Used up what I had left and refilled. - No change. I did use the same pump, maybe the pump itself is not swapping between lines properly, will try either Chevron or a different pump next time. Thanks all.
I have replaced the line using some 3/8" fuel line from Napa (rated 50psi on the tube) I was going to use their vacuum lines but they couldn't tell me what PSI they can run at. Does anyone see any future problems using this product? (heat?) Would vacuum line be better? (I bought some just in case). Also I just did this last night, have not done a log yet to see the result.
Anyone have any thoughts to my other symptoms?
* I changed out from stock plugs to the colder plugs everyone recommends (and gaped them myself) - No change
* I use Costco 92 Octane gas (always have) Figured bad tank. Used up what I had left and refilled. - No change. I did use the same pump, maybe the pump itself is not swapping between lines properly, will try either Chevron or a different pump next time. Thanks all.
