What turbo lag?
08-17-2012, 01:26 AM
#31
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08-26-2012, 11:08 PM
#32
here ya go guys. Vid from a dead stop... kinda missed the gauge in the first part but it goes up as soon as I mash on the pedal.
Boost off idle - YouTube
Boost off idle - YouTube
08-27-2012, 09:20 AM
#33
Most people call turbos laggy in reference to blowers. By blower standards he defnitely has lag, by turbo standards thats pretty low. When rolling down the highway most turbos have very little lag. From an idle most have quite a bit when compared to a blower.
I know but turbos just make freaky power without having to worry about belts and a expensive exhaust to let it all breathe. Theres some billet wheel, ball bearing units out there that I think could come pretty close to no lag, especially if I added about 40 cubes breathing into the turbine of it.
This time next year Ill be strapping some form of forced atmosphere onto my heavy pig. Everyone with a turbo truck just needs to let me drive it so I can make a better decision
I know but turbos just make freaky power without having to worry about belts and a expensive exhaust to let it all breathe. Theres some billet wheel, ball bearing units out there that I think could come pretty close to no lag, especially if I added about 40 cubes breathing into the turbine of it.
This time next year Ill be strapping some form of forced atmosphere onto my heavy pig. Everyone with a turbo truck just needs to let me drive it so I can make a better decision
08-27-2012, 09:28 AM
#34
Nice videos I have read you build thread but forgot what gears are you running and converter? I know that plays a good role in turbo spool up time too. On my 6.2 t72 setup I had instant boost with a stock converter 3.08s and 6l80. What would be ideal on a 4l80 setup?
08-27-2012, 10:19 AM
#36
here ya go guys. Vid from a dead stop... kinda missed the gauge in the first part but it goes up as soon as I mash on the pedal.
Boost off idle - YouTube
Boost off idle - YouTube
08-27-2012, 12:26 PM
#37
here ya go guys. Vid from a dead stop... kinda missed the gauge in the first part but it goes up as soon as I mash on the pedal.
Boost off idle - YouTube
Boost off idle - YouTube
08-27-2012, 12:33 PM
#38
Yes and no...
In the video, boost isnt instant, it actually takes about 2 seconds to get up to 10lbs (at which point the tires spin anyway). When you open the throttle quickly, the entire track between the compressor and the cylinders goes to atmospheric pressure, and doesnt increase until you build boost. So what you see is just atmospheric (0 boost) pressure right when I put the pedal down.
I do miss having all that torque instantly, it made it fun to drive...when the ground was dry. When it was wet it kind of sucked because the wheels spun so easy. However, once it got into the higher rpm the blower was very lacking compared to the turbo. This was probably due to the very undersized blower I was using, but its still a product of belt driven blowers everywhere. The solution of course is to use a bigger blower, but then you constantly have belt issues.
The top end of a turbo is so much better, and for a race/street/strip type application, I would definately go with the turbo. For a DD you never rev past 4k, I would get a blower.
In the video, boost isnt instant, it actually takes about 2 seconds to get up to 10lbs (at which point the tires spin anyway). When you open the throttle quickly, the entire track between the compressor and the cylinders goes to atmospheric pressure, and doesnt increase until you build boost. So what you see is just atmospheric (0 boost) pressure right when I put the pedal down.
I do miss having all that torque instantly, it made it fun to drive...when the ground was dry. When it was wet it kind of sucked because the wheels spun so easy. However, once it got into the higher rpm the blower was very lacking compared to the turbo. This was probably due to the very undersized blower I was using, but its still a product of belt driven blowers everywhere. The solution of course is to use a bigger blower, but then you constantly have belt issues.
The top end of a turbo is so much better, and for a race/street/strip type application, I would definately go with the turbo. For a DD you never rev past 4k, I would get a blower.