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Comparison
I guess I can finally offer my insight on the BB50trim now that I have had more time tuning and playing with it. First, I have owned and boosted the e316G, SBR G50, and the PTE BB5031 all at 21 psi. Spoolup on the e316G hits quick and hits hard. I was able to reach 21 psi by 3500 rpm and she pulled all the way until redline without dropping any boost. I then proceded to switch to a dry SBR G50 (your standard 50 trim) and it packs a huge punch up top compared to the e316G. The spoolup was definitely noticeable compared to the 16G and I hit 21 psi by 4100 rpm (probably had to do with my rich tune also). low-end and mid-range power from the G50 versus the e316G is noticeable also. The e316G is perfect for fast spooling, quick power, and mid to high top end pull. Overall my experience with the G50 was OK to say the least. Now, moving onto the BB5031. First of all, I noticed an immediate difference in spoolup. With the G50, It was hard to build any boost at all while driving around town. With the BB5031, the sucker spooled just like an e316G. 21 psi is achieved by 3800 rpm and it pulls much harder (again probably the tune) than the G50/16G. Up top the turbo screams. With that in mind, I was able to achieve a trap speed of 106 with my G50 @ 21 psi on my first night ever on the track. I am going to the track on Friday and I am more than confident that I will be able to trap 110+. (cross your fingers for me). I will report back when I get back. Lastly, at a measly 16 psi (major problems with boost control, now fixed) I was able to put down 293 fwhp and 269 ft/lb of torque !!! I can't wait to go to the track and go back to the dyno to tune for 350+ fwhp.
I hope this helps.
*edit* Also, all 3 turbos were all ported and were internally gated. the e316G creeped from 21psi to 23 psi. The G50 creeped from 21 psi - 23 psi. The BB5031 spikes at 22 psi and settles to 21psi, rock solid boost after that until redline.
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~Tom
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