Recently, I changed the moffle to my Evo... itīs comes with a Jasma moffle from Japan and I put it a HKS moffle...

Now with the new hks moffle the car sounds good but the boost level up! I have a wastegate for 25 psi with a MBC but itīs close. Now the boost level up to 26, 27 psi...
Can be possible this change of boost for the moffle???? Itīs more free the flow of turbo???

What can I do???

 

Does the HKS have a cat?

 

Cat??? i donīt know...

this is the moffler....
http://www.hksusa.com/products/?id=1155

 

It's most likely boost creep from the freer flowing exhaust. You might just have to turn down your boost a little.

 

Ok, thanx!!! So, my wastegate itīs external, so I need change the spring right??? because, with the MBC close the boost itīs too high!!! this is the only way????

 

My guess is it is boost creeping a bit. With a more free flowing exhaust there is less backpressure post turbine wheel. That means it will take less wastegate duty cycle to achieve the desired boost level. Turn the boost controller out/up 3 full turns. Take the car for a spin and see what the boost does.

Mikey

 

Ok thank you very much!!

I will do that!!!!!!