Can I use a Grainger to LIMIT Boost?

[TurboBaron]

Just wondering if I can use a Grainger to make the Turbo only boost to around 5 psi. Can it be done or am I not understanding the proper use of a Grainger valve??

I'm thinking about economy in the long run....

[Una]

You can't get less boost than your wastegate actuator will give you. If your trying to get less boost, adding a grainger will not do that. The absolute minimum boost you can get would be achieved by running a line straight from the manifold (or the small nipple on the TB) directly to the wastegate actuator can. How low you go varies from car to car. Sometimes it's 5psi, sometimes it's 9psi..

[87shelbyt2]

Skip the WG solenoid and run from manifold to WG can. this should net you around 5-7psi depending on engine, and will be the least you could go. A grainger is a bleed device designed to reduce the amount of pressure pushing the WG open, thus creating more boost.
Damn Una beat me... lol I know it didn't take me 20 minutes to type this...

[TurboBaron]

Allrighty, Thanks guys

[A89aries]

i supposed you could adjust your wastegate arm to the swingvalve as well?

[Koreth]

If you wanted to run without boost entirely, you could always disconnect the acuator rod from the swing valve.

[Rocket]

Quote:

Originally Posted by TurboBaron Just wondering if I can use a Grainger to make the Turbo only boost to around 5 psi. Can it be done or am I not understanding the proper use of a Grainger valve?? I'm thinking about economy in the long run....

I dont think lessing the amount of boost will help you with fuel economy.
The car and engine need the boost to get motivated......other wise you`ll just use more fuel to get the car moving without boost.

My car is a good example...when i`m lugging it, and short shifting (not much boost), it uses more fuel than if i just drive the car normally and rev it out a little. (using the boost)

best way to use less fuel is to get a lighter shoe....

[Phreakish]

best way to save gas: vac/boost gauge and an A/F meter

Seriously, I'm running 14~15 psi with a grainger and have noticed little to NO change in mpg from going from 7 to 15. I get 40 highway miles (37 with sticky tires) and 20~25 in town depending on if I park up or downhill (suspect a gas leak at the filler neck doughnut, also have a dented tank ).

But if you mean economy as in fewer broken parts... then I can't help much, lmfao.

[TurboBaron]

I was under the impression More Boost = More Fuel = Less Fuel Economy.

I have a boost gauge and A/F meter IN the car, when I really get motivated, I'll actually hook them up.

[TurboBaron]

Oh, and it's to stop the pinging until I get the Garrett Turbo and intercooler on.

[QKsilverF1]

Quote:

Originally Posted by TurboBaron I was under the impression More Boost = More Fuel = Less Fuel Economy. I have a boost gauge and A/F meter IN the car, when I really get motivated, I'll actually hook them up.

this is true, but how often do you go WOT and go to full boost, even driving around in traffic you might only get up to 1 or 2psi if youre accelerating quickly, otherwise you are in vaccum the whole time so whatever your max boost is set at is irrelivant. The only time you should really be hitting max boost is when you really need to merge into traffic or something like that or if youre racing.

[Marcus86GLHS]

"...I dont think lessing the amount of boost will help you with fuel economy...."

my 1st thought exactly when i read TURBOBARON's first post. fuel economy will suffer for sure if your engine is working off-design. keep the boost at the factory setting, then use standard driving techniques for better fuel mileage (ie: slow starts and stops, get into the proper gear asap, avoid full-throttle, all that stuff they teach you....)

[Aries_Turbo]

Quote:

Originally Posted by TurboBaron Oh, and it's to stop the pinging until I get the Garrett Turbo and intercooler on.

if you are getting pinging on a mostly stock setup, I would suspect that your knock sensor is shot or your boost is higher than normal or you are running crap gas or the timing is off. you shouldnt hear anything if the setup is stock and healthy unless you are at the limits of timing retard then youll hear stuff.

Brian