biggy

so its not actually removing any materials , its just putting a more aggressive angle on the actual fan then?

ok

100%rice

mmm if u get sum lag its ok if u get ttoo much thats then ur runin a turbo thats too big for ur motor,that is y runs turbo u should ahve the turbo for the engine combined good that way u wont get almost anylag n ull have good boost n ur car will accelerate faster, it jus depends on ur setup n wat u wnana do

tmac

Turbo timers are a waste unless you rott the outta your car and shut it right off... even at the track after doing a pull, by the time i get back to the pits my manifold and oil temp has dropped down to normal leaving no reason to leave the car running...


as for the issue of lag... lag is a term that has been confused from the begining.. the term "turbo lag" refers to the amount of time a turbo takes to reach its operating boost when the engine is within the turbo's operating range.. when people say "my turbo lags till 4 grand." or " that larger turbo has another 1000rpms of lag" or when people refer to lag as the amount of time a turbo takes to spool from a stand still.. is false.. this is referred to as turbo threshold. turbo threshold is the minimum engine speed (or flow rate) required to spool the turbo.

for example:
a t3/O4 on a teg that i work on has a lag of 0.7 seconds once the engine is at a rpm that will spool it..
a gt40 on the same engine take 1.1s.. not that much difference in lag...

but the t3.04 will spool at 4000 and the gt40 spools around 6400.. this is where people confuse the term lag.. the gt40 would appear to have much more lag, since if you were to do a roll on side by side in 4th from 4000 rpm, the hybrid would have boost almost instantly where the gt40 would take a couple seconds. This is mainly due to the threshold of the turbos. if the roll on begun at 6300rpms, the lag would be amost the same since both turbos are withing their boost threshold..

hope this helps a little.. im kinda tired though so it may be confusing

I hope that wasn't too confusing.

DSMonster

Don't forget what this thread is all about.....a clipped turbo will also give you more lag.

4cefed6

It is relative to the size of your turbo, how much boost you are running, whether you have an oil cooled and or water cooled turbo and how good your oil/water cooling system is.

Try driving a car with a 100mm turbo @45psi. That is pushing a lot of heat.

And yes a clipped exhaust wheel will increase lag, but not to badly. The increased flow definetly out weighs the slight lag increase.

tmac

That is definately an application where one could be used.. but if i was running that much boost id let it cool down with me in it... i see turbo timers as being for people who use them when they go to the grocery store... seems pointless for that

Boosted Rio

With the technology in turbos these days it is hard to find virtually any lag in a well designed turbo setup.. Properly sized turbo, ball bearings and extreamly ballanced rotating masses Turbo's today are designed to spool uber fast.. It just has to be sized for the application.

Dan

fousse69

iTrader: (1)

clipping a turbo allows it to spool alot faster and create boost alot faster making turbo lag pretty much obselite and for bigger turbo clipping is almost a nesessity