VTT Stage 2 with Silicone intakes Preliminary results 576WHP/615WTQ

Put the car on the dyno tonight, for a few runs with the new intakes on. The results were pretty much as expected, we can most likely get more power out of the car, but 640WHP on stage 2's (or RB's), very very doubtful. These results were had with no tuner on hand, Dzenno is Skiing, and made me 2 maps one with low timing and one with the high timing (the same timing we ran last time on the dyno), well due to a miscommunication on my part they were left for IJEOS(shop car), instead of I8AOS for the car these are on. So they were unusable meaning we had one back end flash, with timing set to 10-13.5 up top, which is 2 degrees less then we ran on the previous dyno session records.

We also were having a very hard time getting boost smooth in the JB, Terry, and I worked at it for about 20-40 logs, and got it to this level of smoothness, for some reason the PID had to be dropped way down as very small PWM changes were making big swings in boost, even with PID this low boost would still do weird things. It would spool then quickly drop boost, then build it again, which is that little depression in TQ you see from 3500-4250 or so, after that boost would smooth out, and track pretty well to redline. On the previous dyno the Stage 2 record was achieved on 29psi peak to 17.5 psi at redline as that is all we could make. These numbers were achieved with 27 psi peak to 22 psi at redline. We couldn't go any higher as we were getting a LOT of corrections, and LPFP was going nuts, but we can easily hold 25+ psi to redline if we can get the other issues figured out, but BP and shaft speed with those little compressors is going to be up there, and not healthy. If we matched the previous boost in the midrange, and fixed the boost drop off then rebuild issue, the curves down low would basically be identical. As far as LPFP something is really going on there, I will investigate tomorrow, as its pretty scary. With this against us, we still managed to make 576WHP/615WTQ with all these issues, once Dzenno gets back, and we can have a tuner on hand as we dyno, as well as get the LPFP, and boost figured out, the graph will smooth way out, and we have no doubt should achieve 600WHP with a few more psi, and less timing corrections. Either way, the intakes do exactly advertised, offer you much more flow to redline, and a much more flat power curve where it counts in the high end of the rev band.

I threw a graph in there against 2+ as well, there really is no comparison, 2+ leaves the 15T's in the dust on about the same boost midrange and 2 psi more up top.

All, and all we are happy, and these delivered as expected, once we get tuning sorted, we should have nice clean graph, and right around 600/600. Not bad for a set of Stage 2's...:naughty:

Break down:

VTT Stage 2's Billet 15T's
VTT Silicone intakes
VTT Silicone Charge pipe
VTT Double Barrel HPFP upgrade
Fuel-it Stage 2 LPFP with 450 inline
Cobb AP with PTF custom back end flash
JB4
100% E85
All runs done in 4th gear

Attached Files

• run 11 27-23.csv (7.6 KB)