kuntzie Posted January 16, 2011 Report Share Posted January 16, 2011 btw the longer you keep off that wastegate actuator the more damage to the turbo you are going to do, its working overtime trying to push that 20psi, proably at the eff. of 30-40 psi + why not start with the other issues and removing the boost controller what actuator did you get with the turbo? ~7 or~ 15 psi version Quote Link to comment Share on other sites More sharing options...
kuntzie Posted January 16, 2011 Report Share Posted January 16, 2011 i watched again, and i can hear the boost leaks Quote Link to comment Share on other sites More sharing options...
Mach 5 Posted January 16, 2011 Author Report Share Posted January 16, 2011 I have exhaust leaks which i know Im gonna fix that tomorrow. I have a 7psi actuator installed right now. I would still think that if it did in fact have a boost leak that it would still cause an over boost situation if the wastegate was wide open. Quote Link to comment Share on other sites More sharing options...
Mach 5 Posted January 16, 2011 Author Report Share Posted January 16, 2011 i guess what your trying to say that without the actuator hooked up it will cause the turbo to overspin excess rpm which will cause damage..?? I agree with that but I dont think the manual boost controller has anything to do with it. I had it disconnected so I could diag to make sure the actuator was working properly before I removed it. ok well Im gonna see since I found the other post online about this issue is to port the wastegate housing they seem to think that if I leave 1/16" left to seal the wastegate I will be ok. But idk that seems to be alright for a 4 cylinder like the sr20 and the 4g63 where I got that info from. I will list those websites later when I have more time. -Jarek Quote Link to comment Share on other sites More sharing options...
Jonpro03 Posted January 16, 2011 Report Share Posted January 16, 2011 Realize that the SR20 probably flows about the same, if not better than a 3.1. It's the reason they got the same turbos stock (T25 60mm for TGP and T25 54mm for sr20). But, the SR has a 60mm TB stock while the 3.1 had what, 54mm? I know you have some engine work so you probably put the 3.1 close to spec with the SR20DET. What I'm trying to say is that if it worked on a SR20, it will probably work for you as well. Quote Link to comment Share on other sites More sharing options...
Mach 5 Posted January 16, 2011 Author Report Share Posted January 16, 2011 yeah thats what Im thinking too. Im pulling the turbo off today and I will report back. oh and stock tb is 52mm Ive ordered a 60mm so Im sure this issue will be a little worse if I dont take of it. -Jarek Quote Link to comment Share on other sites More sharing options...
Turbo v-sick Posted January 16, 2011 Report Share Posted January 16, 2011 Garrett has an optional housing for the t25 frame. With some modifications it should work with our platform. Quote Link to comment Share on other sites More sharing options...
Mach 5 Posted January 16, 2011 Author Report Share Posted January 16, 2011 Adam I liked that housing but I think that without a different downpipe and crossover this would be too close to the coolant line and the intake system.. At that point I would just switch to v band. update- I found that my crossover had cracked underneath the header wrap and its leaking at both tapered ends. yay!! -Jarek Quote Link to comment Share on other sites More sharing options...
Mach 5 Posted January 20, 2011 Author Report Share Posted January 20, 2011 all fixed. ported wastegate 4mm larger Quote Link to comment Share on other sites More sharing options...
GOT2B GM Posted January 20, 2011 Report Share Posted January 20, 2011 I'm gonna say port WG port. ^^ Quote Link to comment Share on other sites More sharing options...
Mach 5 Posted January 20, 2011 Author Report Share Posted January 20, 2011 I'm gonna say you removed enough back pressure that the turbo isn't as limited flow wise anymore. So now turbo is spinning faster / moving more air, your wastegate port needs to be bigger to allow enough exhaust to bypass the turbine wheel to slow it down. To me if the issue didn't arise until after the 3" DP, then its not actuator issue. I'm gonna say port WG port. thumbsup!! since that was the fix thanks for everyones thoughts and help! -Jarek Quote Link to comment Share on other sites More sharing options...
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