Aem Truboost not holding boost?
Aem Truboost not holding boost?
ok so i had my car tuned at peak 19 lbs, i have the stock 5 LB spring in the tial wastegate that came with the dezod auto kit (no im not auto im now manual), so i will hit 19 lbs full but sometimes in some gears it will only hit like 17 then 18 and 19 and back down to 18 or 17, the truboost says im almost maxing it out i guess because the wastegate spring is so tiny, will putting a 10 lb spring in the wastegate fix this issue?
prolly your best bet is to swap out springs...i cant remember what the figure is but you can only go so high i think above the wastegate spring with most boost controllers...then again i could be way off...iv never had that issue cause iv never been that high in boost...lol
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From: Atlanta/Charlotte/Auburn
Originally Posted by gingles
whats the reason behind the 2x wastegate thing?.....any explanation?
The spring constant is a measure of how stiff the spring is. A spring that is very hard to stretch out has a large spring constant. A spring that is easy to stretch has a small spring constant. As the term spring constant implies, the spring constant is always the same for a given spring, assuming you don't put so much force on it that you break it.
When you use a boost controller to increase boost it is putting more force on the spring, more than what it was designed to handle. When you do that you could break the spring or it becomes unreliable, that's why the say no more than 2x the WG spring.
I am sure someone else can chime in but from what I know about physics and springs that's the gist of it.
^^ you got a point but yeah.. a spring provides a more constant/consistent force to hold boost.. a boost controller is only an aid/help to the spring. What happens if your spring is so soft is that boost pressure does all the work trying to push the wastegate close.. remember boost pressure is more variable and less consistent since there are a lot of factor that affects it like changes throttle position, turbo spec, changing temp, air/fuel mixture and others.. If boost works most of the job you boost will be inconsistent, you're lucky you still get 17 psi on 5 lbs spring
Originally Posted by ecko04
Originally Posted by gingles
whats the reason behind the 2x wastegate thing?.....any explanation?
The spring constant is a measure of how stiff the spring is. A spring that is very hard to stretch out has a large spring constant. A spring that is easy to stretch has a small spring constant. As the term spring constant implies, the spring constant is always the same for a given spring, assuming you don't put so much force on it that you break it.
When you use a boost controller to increase boost it is putting more force on the spring, more than what it was designed to handle. When you do that you could break the spring or it becomes unreliable, that's why the say no more than 2x the WG spring.
I am sure someone else can chime in but from what I know about physics and springs that's the gist of it.
