So my friend and I put the single spring mod Greddy Type-S on my stock evo last night. We checked to make sure none of the lines were pinching or restricted. My car doesn't make full boost quite as often or holds it longer than stock DV anymore.

So therefore I might have a leak? Do i need to adjust to harder setting or my friend said its my restrictive stock airbox causing this.

Anyone else have ideas?

 

Tighten the spring.

 

agreed and go get a intake a mailin flash

 

Put the stock back on or a MR BOV, because the Greddy is overkill and if it vents to atmosphere is causing you to loose power.

 

oh yeah, forgot to mention, I am recirculating.

 

Does a dirty intake filter in the stock airbox make low boost like this happen? Can it even?

 

i had the same one, i didn't have any problems with the type-s, infact i noticed that the boost seemed to kick in a few 100 rpm earlier, and i also got that nice whistle between shifts

 

i have the type -s. put both springs back in. if you have an 05. I have an 05 and the single spring mod was not working out that well.

 

how do I know if I've made it too hard??

 

bump

 

you'll start to hear more fluttering at lift-off