CR From Hell
Never Satisfied
- Joined
- Oct 31, 2007
- Messages
- 1,031
Sure man no problem. All of this was on my previous truck, 05 5.9 CR with 100% exergys and Smarty TNT-R tuning. I started with a 475/83/1.0 after my Batmo blew up .3 miles after install, at the track I saw drive above boost by 5-10#. Generally it ran 55# of boost to 60-65# of drive, with smarty on #8. Basically the same boost/drive ratio on the street only with lower numbers obviously. That was with smarty on #5. Then I switched to a .9 housing. It was alot easier to drive on the street and ran harder at the track. Boost was again 55# but drive crept up to 65-70#. My best time with the .9 housing was 11.49. Believe the best with the 1.0 was 11.59.
Then I decided to try out the 87 wheel, 475/87/1.0. I was nervous about drivability but that wheel is ridiculous. I loved it! Regardless of the tune or how I drove it, boost was always 10# higher than drive and it made some awesome power. The only time I saw boost barely even with drive was right after the 1000' mark on the big end. I gained about 2 mpg going to that wheel and I felt it was easier to drive with than the 83 wheel. Fastest time spinning well past the 60' mark was 11.24@122.2. The only difference going to the .9 housing with the 87 wheel was quicker spool up getting on it on the highway. I was stunned how much air that wheel could move for its size.
Both of these turbos were standard cast wheel BW units. Got them both from Ashley Black. The one that was on there when I sold it was a 76/87/1.0, and it was just stupid. He had the comp wheel cut from a 80mm FMW wheel. So it had the 76mm inducer with the 80s 110mm exducer. Sounded like a supercharger and moved crazy air. Never saw drive above 40# with that set up, again same tuning and set up.
