how much boost can the type s hold? i thought it was 14. is that correct? i havnt seen any evo's with the type s . this could be why. but correct me if im wrong.

 

They don't like much more than 17, but I was running 22+ with mine on my DSM. I've read on here of a few running them with their EVOs.

 

so ur sayin that our stock plastic diverter valve holds more boost then a machine crafted type s?

 

it will hold more then your stock turbo produces, my evo runs 20 just fine with the vavle and no leak

 

I think this is about type s:
https://www.evolutionm.net/forums/sh...threadid=24611

 

I'm running a type s as well and it works fine. I'm running stock boost for now. It spikes to 20psi and then creeps back down to 17psi After I did Silver Surfer's mod it works and sounds better than the stock BOV. If you don't take the smaller of the 2 springs out than the type s is no good for the Evos.

 

ive ran up to 23psi with no problems with the greddy type s

 

yea but did you take the smaller spring out? The BOV without the mod will hold up to 30 psi. With the smaller spring taken out it should hold 24-25psi with no problems.

 

Then why even take the spring out?

 

no modifications done to my greddy type s... no leaks and no problems

 

Or you can just go to www.roadraceengineering.com and order a Greddy Type-S kit which comes pre modified for our evo's and with the bracket, all for $230.

This is the respose I got from RRE reguarding what BOV they run in their cars...
"We use the GReddy Type S BOV. We modify it a little, we add a pressure
source to the adapter and that allows it to open easily. It blows back in
and is an easy bolt on. $230 for the kit.

Mike W"

 

never took out the little spring and it is perfect, i see no need to take it out

 

is the type s supposed to blow off in a whoosh type sound all at once or is it supposed to have a fluttering sound?

 

my friend is running 24.5 lbs on his evo with the type s, so go figure... i dont know how well it holds but is car is surely fast! makes an almost stock evo (mine) feel slow...