WeirdStyles_net

There has been alot of useful information just flowing from this thread, but of all the useful info there is still one minor misinformation running around here, i would just like to clarify on turbo lag.

Lag is a measurment in time from when the throttle position is changed till the increases can be found as a result of forced induction.

Boost Threshold is at what RPM a turbo begins to produce power, aka "Start kicking ___".

Example of turbo lag:
In a stock turbo DSM (Talon/Eclipse whatever) cruise a brisk 2500RPM, increase the throttle and you'll see the responce is almost immediate, hence very little lag. Ittiy bitty turbo design, great responce....

Example of boost threshold
In the same DSM stage at a 1/4 race at 2000RPMs, drop the clutch and the power (turbo) is with you the second the clutch drops. Now do it again, but stage at 1100RPMs and notice the lag* between the launch and when the turbo actually produces power.

* Note, i used the word lag to define the distance between 1100RPM and 2000RPM to show how this term can easily be confused.


Easiest explantion: There is no such thing as lag off the line, there is only lag while in motion.

If anyone here is confused on forced induction and really wants to brush up, check out Maxium Boost by Corky A. Bell, then we'll start talking about throttle responce, boost threshold, turbo lag, inertial forces, tensile forces, efficiencies and all that crazy ____...

jrv2000

Why did you revive a post over a month old? We are all done with this discussion, lets let it be.