340/E85/D1SC/FItech1200 big hp SB guys step inside please!

1mean340 said

Sub com, I am really interested in hearing about your build and what kind of problems you have been having. Can you elaborate? I have heard some great success stories from e85/forced induction Fitech builds and other people saying, like you, that they could never get it right. I am pretty worried about this, tuning is NOT my expertise and I was actually planning on hiring a professional tuner to dyno tune the car and then learn what I have to so I can tweak it from there. Wondering if the supercharged may be a little easier to tune than the turbo with the turbo having a linear boost curve. Any tips you can give me or insight into the problems you are experiencing would be a huge help!

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You have an intercooler. You may consider starting off with low boost and 91 or 93 pump or whatever you have in your neck of the woods. Like others have mentioned. Dual Walbros or the Boschs should have you covered for fuel delivery. I also think a supercharger will be easier to tune then a blow thru turbo app. If you go straight to E85, apply the same rule. Start with low boost and sneak up on your tune before you turn up the pressure. My issues are probably mostly my fault. But I'm controlling timing and doing boost and doing E85 all from the FITECH 1200. I had a couple of good runs on it before I added timing control and the FITECH did a great job of honoring my target AFRs under boost. Now that I'm controlling timing, I've introduced quite a few more variables and I have to start my tune over. Like you, I might end up going to a tuner or at least get some dyno time and play around with the tune before getting into the turbo too hard.