14lb Spring in my Tial 38 but I'm only doing 10psi?

[BOOstGhost]

has anyone had this happen to them? and no I don't have a boost leak. at least I don't think so... i'm pretty sure I don't though, brand new FMIC and i tightened down all the clamps real good and no leaks before that. I'm going to check for leaks tommorow. Any others ideas when I get back will be nice.
-adam-

 

[koroshiya_jason]

check to see if the bov is bypassing the air.

 

[JiggahMan]

14 lb spring doesn't mean you're going to be running 14 psi... It means the spring pressure is 14 lbs, just use a boost controller.

 

[BOOstGhost]

14 lb spring doesn't mean you're going to be running 14 psi... It means the spring pressure is 14 lbs, just use a boost controller.

you serious? I was told a 14lb spring = 14 psi? If thats true thanks for the info
-adam-

 

[funniegus]

The 14b spring is rated for 10psi. If you want it higher use a mbc or put a different spring on it.

 

[BOOstGhost]

rep points for both of you guys..thanks

 

[Big Woo]

Perhaps a little pneumatic logic is needed here.

Say you have a 14 pound spring, we will assume that, that means at the installed spring height it will take 14 pounds of force to move it, plus the spring rate. (spring rate is generally measured in lbs per inch).

14 psi will only apply 14 pounds of force if the effective pressure area is 1 sq inch. Remember PSI= pounds per square inch, so 14 x 1 = 14. If we apply this same logic with 10 psi and change our pressure area to 1.375 we get 10 x 1.375 = 13.75.

 

[scottsee]

Thats the kind of stuff I come on here for. Nothing wrong with a little Math at 6:45am

 

[nanokpsi]

Perhaps a little pneumatic logic is needed here.

Say you have a 14 pound spring, we will assume that, that means at the installed spring height it will take 14 pounds of force to move it, plus the spring rate. (spring rate is generally measured in lbs per inch).

14 psi will only apply 14 pounds of force if the effective pressure area is 1 sq inch. Remember PSI= pounds per square inch, so 14 x 1 = 14. If we apply this same logic with 10 psi and change our pressure area to 1.375 we get 10 x 1.375 = 13.75.

That's no fun. I ordered the 1.4 bar spring in mine with hopes that it would be enough for what ever boost I wanted to run. Is it true that you can only double the psi of the wg spring with a mbc? I will run a search also.

 

[BOOstGhost]

Perhaps a little pneumatic logic is needed here.

Say you have a 14 pound spring, we will assume that, that means at the installed spring height it will take 14 pounds of force to move it, plus the spring rate. (spring rate is generally measured in lbs per inch).

14 psi will only apply 14 pounds of force if the effective pressure area is 1 sq inch. Remember PSI= pounds per square inch, so 14 x 1 = 14. If we apply this same logic with 10 psi and change our pressure area to 1.375 we get 10 x 1.375 = 13.75.

thanks for the info

 

[1fast97gsx]

That's no fun. I ordered the 1.4 bar spring in mine with hopes that it would be enough for what ever boost I wanted to run. Is it true that you can only double the psi of the wg spring with a mbc? I will run a search also.

a 1.4 bar spring will get you 1.4 x 14.5 psi. That's a different measurement than lbs. It comes out to just over 20 psi.

 

[nanokpsi]

a 1.4 bar spring will get you 1.4 x 14.5 psi. That's a different measurement than lbs. It comes out to just over 20 psi.

I am aware of that, but with the issues started above (14psi only giving 10 psi) it lkooks like the 1.4 bar spring would only support 15-16psi. I guess I will find out when I install it.