I was sitting back watching some show on the speed channel.They had a little review of a 9 sec Hot Rod class civic(i forgot who's car it was but it was definitely a 9 sec car) They showed a nice long shot of the engine bay.They said it was boosting close to 30psi and what shocked me was it had a Greddy Type S blow off valve.How's this possible,I was thought the Greddy was a low boost street valve with a max around 15-18psi.I figured if the Type S was pushed higher than that it would start leaking and lose boost,I guess not......anyone have a diff opinion on this valve,do you think its ok to use it under such hi boost?

 

i would imagine he had a stiffer spring in there.........

 

when I had a type S it would open up after 15 psi or so...

I have heard if you use multiple bovs it would hold better, but I dont know why.. in mine the spring was just being pushed open from the inside...

 

You can get a stiffer spring for the Type S.

And multiple BOV's are used in extremely high boost pressure applications where they need to release more than what ONE BOV can flow. But for most, one BOV is plenty.

 

If it's this red hatch with Pacific Performance stickers, it is Steven Thompsons car. He runs 30+ psi with i think a t66 but i know for a fact he runs the Type S bov. It seems to hold the pressure and not leak. Check out PacificPerformance.com for more info.

 

Yeah that looks like the car and set-up i saw...

I dont think they have a stiffer spring avail for the Type S or did at one time and dont anymore cause i dont see it on the Greddy site..only for the Type R blow-off valve.



[Modified by D-Man, 3:11 PM 12/29/2002]

 

I boost 18psi and the Greddy type-S is fine with it

 

I will be at Stevens shop tomorrow to get my car so i'll ask him if he has a diffrent spring in his bov.

 

Hey tell Darin Adam says hi, and tell him to make sure he has enough diesel...(he'll know what your talking about) eheh...

 

even if it is possible to hold 30 psi on a type s, why not just get a bov made for that much boost?

 

because its possible and i already have one

 

I would think they could use the Greddy Type R BOV ... But if it aint broke, don't fix it.

 

i have turbo mag with that car in it.. pretty insane

 

Not everything used on a RACE car is bought through a catalog.