Attention: TDR Forum Junkies After I just got the transmission taken care of, I thought I would try and optimize the stock turbo configuration for my truck by just playing around with the wastegate. Where the gate was set (never touched it since I got the truck with just the #6 plate kit, I had my boost elbow screwed all most all the way out and I could go past 42 lbs on the gauge if I wanted to. 
I thought I would try to tame it down to around 30 or so with the gate, then fine tune it up with the elbow. I had read on here that 1 turn equals ~3 psi. So I went and gave it 5 turns to see what I would get out of that. Took the truck out for a drive. Right away I notice a lot more lag, for some reason, and the smoke that I see a lot of people get with bigger housings on there turbo. It literally looked like I was trying to spool up while dragging a sled. The most smoke I have seen out of that truck. Also I lost the turbo whistle that I had before. I know it sounds stupid but before I could even get about 15 lbs in park revving the throttle, and I could here that whistle. Boost was definately lower in park than it was before. On the highway, taking it easy slowly accelerating, I glance at the pyro and it showed about 1000° pre-turbo. I thought WTF. So I get it up to highway speed, set the cruise, and I notice the gauge slowly getting down to about 800°. I thought that was decent, but the high EGT at part-throttle really got me. Then I went WOT and noticed the gauge climbed a lot slower and I could get up to about 90 or so and the gauge was at a respectable level, around 1400°. Boost was still up at 38 lbs. So just for curiousity I brought the truck back to the shop and tried to tune the boost down to around 30 lbs or so. Turned the rod out two more turns and buttoned everything back up. So 7 total turns from where I had it. By this time it had just gotten dark out so I couldn't tell the smoke effect. The lag was still there of course, and hadn't changed at all. This time EGT's climbed even slower yet, and I could only hit 33 lbs of boost on the gauge. But with the slower climbing EGT's, I also loose the response in all rpm and speed ranges. It seriously feels like I put a different exhaust housing on the turbo. Reminds me of one of Jim Fulmer's dyno videos exactly, while spooling up. A bit less smoke though. :-laf
Can we come to any conclusions on this as to why the adjustments affected the performance that much? I really don't know where to set it. I really miss the response of the old setting. And I thought I would have gotten a bigger change of boost than I did in each turn of the actuating rod. Any recommendations?
I thought I would try to tame it down to around 30 or so with the gate, then fine tune it up with the elbow. I had read on here that 1 turn equals ~3 psi. So I went and gave it 5 turns to see what I would get out of that. Took the truck out for a drive. Right away I notice a lot more lag, for some reason, and the smoke that I see a lot of people get with bigger housings on there turbo. It literally looked like I was trying to spool up while dragging a sled. The most smoke I have seen out of that truck. Also I lost the turbo whistle that I had before. I know it sounds stupid but before I could even get about 15 lbs in park revving the throttle, and I could here that whistle. Boost was definately lower in park than it was before. On the highway, taking it easy slowly accelerating, I glance at the pyro and it showed about 1000° pre-turbo. I thought WTF. So I get it up to highway speed, set the cruise, and I notice the gauge slowly getting down to about 800°. I thought that was decent, but the high EGT at part-throttle really got me. Then I went WOT and noticed the gauge climbed a lot slower and I could get up to about 90 or so and the gauge was at a respectable level, around 1400°. Boost was still up at 38 lbs. So just for curiousity I brought the truck back to the shop and tried to tune the boost down to around 30 lbs or so. Turned the rod out two more turns and buttoned everything back up. So 7 total turns from where I had it. By this time it had just gotten dark out so I couldn't tell the smoke effect. The lag was still there of course, and hadn't changed at all. This time EGT's climbed even slower yet, and I could only hit 33 lbs of boost on the gauge. But with the slower climbing EGT's, I also loose the response in all rpm and speed ranges. It seriously feels like I put a different exhaust housing on the turbo. Reminds me of one of Jim Fulmer's dyno videos exactly, while spooling up. A bit less smoke though. :-lafCan we come to any conclusions on this as to why the adjustments affected the performance that much? I really don't know where to set it. I really miss the response of the old setting. And I thought I would have gotten a bigger change of boost than I did in each turn of the actuating rod. Any recommendations?
