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Message: [QUOTE="94.5stroker, post: 1114114, member: 1746"] I have a 94 zf5 running 160/0% with a D66. I haven't been happy with the combo since I put it on. It is smokey and laggy even with different tunes. I recently found out that I have a leak in my uppipes and intake plenums, so I've decided it's time to change it up. I've decided to go up to 230/100% and try to shoot for the 500-600 range. It's my daily driver and I use it for towing around the farm some, usually not too heavy, but I want EGT's to be in check. I also want to keep the setup as reliable as can be (understanding that when you mod you increase the risk) will I be pushing my luck on a stock bottom end? I've been told that if I get a 1.0 a/r housing for the D66, an intercooler set up with new uppies and intake plenums to eliminate leaks, it will be a great combo. That it would do much better lighting the turbo with my manual, and keep the EGT's in check. After spending a lot of time comparing prices between getting all the pieces to keep my D66 running and just moving up to a T4 with either a S366 or S468 the prices aren't very different. So my questions are which way should I go? I can sell the D66 and bellowed uppies, my stock turbo, 160 injectors, and a TS chip I had before my hydra to recoup some of the cost in switching to a T4. I just rebuild the D66 under 5k miles ago with a 360 kit and Beans new 66mm billet compressor wheel. Are there any issues I will run into with the D66 and the 230/100's? Drive ratio, turbo life? Will the D66 with the tighter exhaust housing have issues on the top end? If I should go up to T4 which is the better option the S366 or S468? Same question on drive/boost ratio and turbo life for those two. I've spent a lot of time trying to get the thing smoke free and drivable and I am just tired of high EGT's and smoke. I also want more power, strange I know haha. Thanks in advance, hopefully you can decipher that mess. [/QUOTE]