like the topic say ... If I want to boost something like 20 psi and the spring is a 5 psi spring does it influence something like faster spool or anything like this ??? I got a TIAL 38 MM ...

I had a Greedy turbo kit controled by my AEM EMS before and I didnt change the spring so I belive that with an external wg this is the same thing ???

Thanx for the info even if it seem stupid I dont know ???

 

I believe the rule of thumb is don't boost past twice what your spring is rated. Probably because of spiking/reliability issues.

-PHiZ

 

Some EBC's, like the Profec B, can't go more than double the wastegate spring for some reason. It's a huge pain in the ***, that's for sure.

I'm not sure if AEM is the same, probably not.

I would run a spring a few psi less then the lowest boost you want to run, no reason to use a 5 psi spring really.

 

the higher you go above the wg spring the harder it is to control the boost level. you can do 30psi with a 5psi spring but its a bitch and a 1/2 to tune.

 

perfect guy so my question was important... finally ... I will boost around 15 psi so I should get a 10 or 12 psi spring it is right ?

 

anyone could confirm this by experience...

 

normally we like to run on the wastegate spring for low boost. it makes things easier. but if you want to use the boost control to raise it then a 10-12 psi spring would work well for 15psi boost.

 

yes I will use the boost control with my AEM... this is what I was doing last summer with my Greddy kit ... I have all it require... so I will order a spring

Thank you