Hey I'm currently mid build on a single turbo (GT45) build and am ready to buy a wastegate. i am running the xs power manifolds that come with a wastegate port set up for a 38mm. The location of the gate is what i am concerned about due to it coming off the number on primary on the turbo side. i plan on running 7PSI for now and want to make sure i get a big enough wastegate. So will 38mm do the trick and has anybody had any luck with ebay wastegates?

 

Kyle86 on here has a thread on in the lsx swap section GT45 and a single emusa 38mm ebay gate. Seems to hold 7psi fine for him on the 4.8L and 5.3L. I personally would go minimum 44mm especially if you think flow is an issue.

In the past I have always had good luck with X02, I had two 44mm for my current twin scroll GT45 setup but they were too bulky and I snatched up some Tial MVS 38's on Black Friday for $200 a piece.

Jay

 

If in a good location to extract flow then a 38 could work but i agree, you should go 44-50 for ultimate low boost control on a single turbo

 

When I was just running an 8 pound spring and 44mm ebay wastegate, my boost would creep with the T72 turbo. Save yourself the headache and install a 50mm wastegate on that XS Power setup...

 

Good stuff guys i will get the 50mm not a huge price difference just means i get to install some awesome v band flanges! any suggestions on intercooler piping sizes just finished the hot side and will be in the market for intercool kits.

 

2.5" is fine for 500 hp. 3" for more. Big power singles use 4"