Originally posted by Zippy_Zetec:
on a side note, turbos would only make take off times worse if they dont have the proper mods to accompany it, turbo lag...unless the turbo kicks in at like 1200RPMs which is possible, but not economical. and they would have to be running a Higher PSI to give them a decent launch IMO.



Are you really this dumb? or do you just play it on the internet?

I'm sick of people spouting ignorant parroted gibberish about turbo lag, just so they can think they are smart.

1. Its not lag, its called boost threshold. For a given turbo system, there will be an rpm, under which, at WOT, there is still not enough exhaust energy to spool the turbo. Lag is the time it takes, when you are already above this threshold (and zero or "negative" boost), for the turbo to make appreciable boost from when you hit the gas.

2. How in the world could a turbo make launch times worse than the same car without a turbo???? (aside from excess power and limited traction) If the turbo hasn't spooled enough to create boost yet, the engine acts no different than the same engine with no turbo, at least until the turbo picks up enough rotational speed. Think of it this way, if you take two identical cars, add a turbo to one of them, and then line them up side by side. The two cars will perform virtually identically until the turbo car starts making boost. You could say the non-turbo car would behave just like a turbo car with infinite lag, or a boost threshold above its rev limit.

3. If a turbo is sized properly for an engine/application, it won't make boost unless its under load, ie accelerating. So except in extreme circumstances (ie drag racing setup w/ a two-step or stutter box to help build boost when not moving) raising the boost pressure at the wastegate won't do jack for the initial launch.

Balance is the Key. rarasvt@comcast.net