Bull Run
Well-Known Member
- Thread starter
- #1
Installed VS2+ today on a stock motor with FBO+Meth. I am currently running an initial tune for it, which has the same "Torque Maximum" value as the final tune with stock turbo. I used "LTT Torque Final" values as comparison.
1. Best stock turbo run was made on a much colder day. Charge temp at the beginning of WOT 3rd gear pull for VS2+ was about 24 degrees hotter, but it made about same amount of torque. In comparison, stock turbo lost about 15 ft/lb on runs with similar higher charge temps.
2. During best stock turbo run, charge temp rose 14 degrees from the beginning to end. For VS2+, start and end charge temp was about the same. Note that both runs used WMI.
3. VS2+ should have more lag than stock, but I just can't feel it. Data log shows that both hit peak at about the same time, but note that 3rd gear pulls started at near 3000 RPM.
4. For lower gear acceleration, doing WOT in second gear resulted in traction control kicking in and staying mostly on until I left off the throttle to avoid going 10 over the speed limit. I was on Sport+ (I only use the track mode for 3rd gear data log runs, on long highway on ramps with no cars around me).
5. Not surprisingly, VS2+ can move air without heating it up as much as the stock turbo. While I will be nowhere close to the limits of this turbo on a stock motor, it will lesson the impact when the hot weather hits the Phoenix area.
Definitely a bigger turbo, swapped in a Turbosmart WGA before the isntall.
Looks stock under the head shield, which is great for my sleeper concept.
1. Best stock turbo run was made on a much colder day. Charge temp at the beginning of WOT 3rd gear pull for VS2+ was about 24 degrees hotter, but it made about same amount of torque. In comparison, stock turbo lost about 15 ft/lb on runs with similar higher charge temps.
2. During best stock turbo run, charge temp rose 14 degrees from the beginning to end. For VS2+, start and end charge temp was about the same. Note that both runs used WMI.
3. VS2+ should have more lag than stock, but I just can't feel it. Data log shows that both hit peak at about the same time, but note that 3rd gear pulls started at near 3000 RPM.
4. For lower gear acceleration, doing WOT in second gear resulted in traction control kicking in and staying mostly on until I left off the throttle to avoid going 10 over the speed limit. I was on Sport+ (I only use the track mode for 3rd gear data log runs, on long highway on ramps with no cars around me).
5. Not surprisingly, VS2+ can move air without heating it up as much as the stock turbo. While I will be nowhere close to the limits of this turbo on a stock motor, it will lesson the impact when the hot weather hits the Phoenix area.
Definitely a bigger turbo, swapped in a Turbosmart WGA before the isntall.
Looks stock under the head shield, which is great for my sleeper concept.
Sponsored