Stupid question about turbos...... HELP

Spencer · #1 (**permalink**) 12-20-2001, 03:57 PM

I was just thinking, since you can have an electronic boost controller on a turbo'd car, would it be possible to turn the boost to 0 and essentially turn off the turbo? And then basically be running NA again, and have no additional strain on the engine (because there is no boost)???

Just curious. Thanks

mrsha007 · #2 (**permalink**) 12-20-2001, 04:00 PM

very good question. i would think no cuz the turbo lets out the exaust fumes so it would have to run to let the fumes out. but that would be nice if you could. maybe a pro could answer cuz im just guessing.

fourfa · #3 (**permalink**) 12-20-2001, 04:01 PM

depends on how big the wastegate and wastegate piping is. most turbos, probably no. probably 5 psi is doable.

///MCubed · #4 (**permalink**) 12-20-2001, 04:03 PM

nope, turbo will still make some pressure (and hypothetically, if you lowered the compression and had no boost, you would not have the same output as an NA engine).

sweetlikealemon · #5 (**permalink**) 12-20-2001, 04:06 PM

I had a mate with a Ford Sierra Saphire Cosworth, 2ltr Turbo....anyway his turbo blew.....it ran shit when it blew, slower than the 1.6ltr shitter.

His car needs high compression for it to work at top performance and this was not happening without turbo

SupraDreamer · #6 (**permalink**) 12-20-2001, 09:41 PM

Yeah most likely you would be making some sort of boost, but it ultimately depends on the wastegate spring. All a boost controller really does is change the amount of pressure that the wastegate "sees" so that you can make more boost because the wastegate will stay closed longer. The lowest amount of boost you could make would be what ever the wastegate spring is. So if the spring only holds 5 si then that is the minimum boost you would make.

trying to run 0 PSI on a turbo motor would be pointless though, cause the car would run like crap and most likely cause more problems from running pretty rich.