turbo question

[Black Knight 00]

why doesnt a turbo spoon when the car is in neutral?

[eclipsed4utoo]

Originally Posted by Black Knight 00

why doesnt a turbo spoon when the car is in neutral?

spoon? i didnt know a turbo spooned.

[cficare68]

Turbos don't spoon when they are in gear. I believe they spool, but they don't spoon, fork, or even knife.

[Black Knight 00]

yeah yeah yeah spool... but why dont they spool out of gear, the engine is still making exhaust?

[eclipsed4utoo]

Originally Posted by Black Knight 00

yeah yeah yeah spool... but why dont they spool out of gear, the engine is still making exhaust?

it does spool, but at a very very slow rate.

[buckchuck27]

theres nothin to to keep the pressure in. the engine can rev up freely so the pressure doesnt build. can someone back me up or am i wrong???

[eclipsed4utoo]

Originally Posted by buckchuck27

theres nothin to to keep the pressure in. the engine can rev up freely so the pressure doesnt build. can someone back me up or am i wrong???

i dont understand your statement, "theres nothing to keep the pressure in". what do you mean by that?

if you rev the engine in neutral, you WILL build boost and that turbo WILL spool.

this is my logic(not proven, just logic). the engine is producing exhaust(yes very little, but it is producing some). the exhaust coming out of the engine will spin the turbine wheel of the turbo(basic turbo operation). since there is very little exhaust being created, then the turbine wheel is spinning very slowly. since the compressor wheel is connected to the turbine wheel, if the turbine wheel is spinning, then the compressor wheel is spinning.

thats my logic of a turbo sitting at idle. can somebody tell me if i am wrong?

[cficare68]

Sound about right to me

[buckchuck27]

im not sayin it doesnt spool, it does. what im sayin is it doesnt build boost becuz theres no load on the engine, without any load, the boost cant build.

[Sleepr awd]

^^ yeah, when there is a load on the engine, its easier to spool the turbo, without a load the engine rev's up too fast to build boost where you think it should be

[eclipsed4utoo]

Originally Posted by Elchicoloco86

^^ yeah, when there is a load on the engine, its easier to spool the turbo, without a load the engine rev's up too fast to build boost where you think it should be

if the turbo doesnt build boost when revving in neutral, then why does the BOV release air?

[buckchuck27]

becuz when u let off the the throttle the turbo is still spinnin. so since the throttle is closed the vacuum opens the BOV and the pressure that is now building up in the intake pipin get blown off.

[buckchuck27]

becuz when u let off the the throttle the turbo is still spinnin. so since the throttle is closed the vacuum opens the BOV and the pressure that is now building up in the intake piping get blown off.

[eclipsed4utoo]

Originally Posted by buckchuck27

becuz when u let off the the throttle the turbo is still spinnin. so since the throttle is closed the vacuum opens the BOV and the pressure that is now building up in the intake pipin get blown off.

first thing...

boost = pressure

if the turbo is building pressure in the intake, then its building boost.

first you said that pressure doesnt build b/c theres no load on the engine when revving in neutral. but then you said that, once the throttle body closes, the pressure that is building is vented by the BOV. so which one is it? not trying to argue, just trying to get you to clarify what you are saying.

[buckchuck27]

ok to start from the begining. the car is in nuetral and u rev it up opennin the throttle, the air is blown into the engine but its is not buildin pressure becuz there is no load on the engine. when u close the throttle, the air that was gettin blown into the engine now has no where to go becuz the throttle is closed. the vacuum in the in intake manifold opens the BOV and the air that had no where to go before (becuz the throttle closed) now blows out the BOV. i hope that clarifies it, im not to good at explaining.