Here's what I know.... at our last dyno event with Bill at PHP I made 451rwhp, shortly after I ran a 14.1 and some change at a hair over 95mph with the truck weighing approx. 7750. Bill's dyno is accurate. With that being said, I that track times to back up numbers are important in most cases as they are here. I understand the skepticism on this, but the facts are that I just dynoed yesterday and the truck was having issues. I would like you guys to consider these numbers accurate, but I can't help it if you don't. I know what the truck has in it. We are using the dyno time we have to get any bugs worked out (like I experienced yesterday) so lets use the huge amount of knowledge here at PSA to help me get my boost issue fixed and then we'll try it again on the dyno. When I'm happy with my numbers on Bill's dyno and feel that there is no more power left in the stock fuel injectors, I'll give you the track times. But until I'm happy with what it has on the dyno, I'm not running it down the track. No need to break anything just yet.
After we establish the maximum we feel is possible from this turbo and everyone (or at least everyone who will) accepts the numbers, I'm gonna give JJ at Dozer's Diesel a call and get some 155's or 175's. For right now though the dyno numbers are what you get.
On to the problem with boost I'm having. I'll tell the whole story and let anyone who wishes to offer an opinion chime in. OK, about 6 weeks ago my LiveWire died while the truck was getting the powder coating done on the IC piping. I sent it back to SCT and they fixed it, but in the process they had erase everything on it. That meant I had no more stock file. The truck had the SPD loaded when the SCT died so thats what it recognized as my stock file when I got it back and reloaded my tunes. This was all well and good as long as I was running some version of the SPD tune, but when Vivian sent me the new Looney Wild to try, things started getting weird. Adrian and I think that since I can't go back to a true stock Ford file before loading a new tune, they are somewhat over lapping each other and confusing the piss outta the ECM. Add to that the massive amount of air the 4088 was moving at WOT and the ECM is just to confused to keep up, so it cuts boost and fuel. SCT can rewrite a stock file for my truck but it takes time and I havn't had any of that. I originally thought, why do I need the Ford file? I've got different tunes for every situation. What I failed to realize was that you need the stock file to program back to before loading a completely different tune. All these tunes are written from the stock files as a base, and trying to rewrite the ECM when it isn't stock apparently FUBAR's stuff. Like I said though, everything was fine as long as I was running Chris's tunes, but when I tried Vivian's (no fault of Vivian at all, they are just totally different tunes), it started acting up. Im gonna call SCT on Monday and get a stock file back. I'm also gonna pull my MAP,EBP and MAF sensors as well as reload a stock tune and get this figured out. Bill showed me on the data logs of the dyno pulls that my VGT duty cycle was falling off to <15% after 2400rpm. I have to believe 10+psi of boost is worth another 10rwhp at least, especially since it was smoking on the dyno and its been very clean. I guess its easier to see smoke at 0mph than 85mph, but this was more smoke than the last time we dynoed. As soon as the rain lets up, I'll start tearing this thing down and getting some answers. Whats really weird is that after installing Bills stock turbo, I blew a boot off on the interstate on my way home, at 40+ psi of boost. Then after reinstalling it and driving a while it wouldn't break 28psi. Today its down to around 24-26psi when we were going to Mother's Day lunch and hit 30+psi on the way home. Something is not running right. I also need to drop some line pressure on my 3-5shift, unrelated to the boost issue, but needs to be done after the GoGo solenoid install. Let me know if you guys have any idea's on what else I might need to check.
My main goal here is to push my stock injectors to the limit. Not what is considered the limit right now, but the actual limit. I don't know where that is, but I aim to find it. With this turbo, and tuners like Bill@PHP, Chris@TSD and Vivian@Quick tricks I believe 500 is attainable. I also agree with Windrunner408 that the 500 HP title should be reserved until the dyno chart shows 500rwhp.
