Low boost problems
I have a 95gt that I swapped a 351w into and put an on3 351 swap kit in.
It's been to the Dyno 2 times and had the same problem both times. The problem being low boost. After the first trip to the Dyno, the on3 turbo had a bunch of play in the shaft and seemed a bit undersized for the job, so I went back with a bigger Borg Warner turbo, but it didn't solve the problem.
For whatever reason, the car makes 5.6psi and nothing more. We've tried 2 boost controllers, 1 electronic,1 manual. And 2 different wastegate springs, none of which made any difference. I'm not sure if we have a huge boost leak or restriction somewhere, or if the boost pressure is floating the valves and just blowing the boost right back out the exhaust?
I brought the car back home to troubleshoot it and figured I would see if someone on here had any ideas to try while I'm working on it this weekend.
Any input would be greatly appreciated!