+20psi w/ 34mm Flapper?

[RU2SLOW?]

I've done some searches and I found a number of threads that talk about whether or not the 34mm flapper mod helps out with boost creep at low boost levels on the E316Gs. However, I've only seen it mentioned in passing that the 34 mm flapper often blows open when the boost is set to around 20 psi or higher. I was thinking the 34 mm flapper may be a good idea, but I don't want problems when I run higher levels of boost. I know that Bulls Eye makes a 38mm flapper assembly to upgrade to and I was thinking of this, but a few people have been saying that there isn't really room for the 34mm flapper, so I imagine the 38 mm would be worse. Can anyone offer up any info and/or advice? Thanks...

BTW, I hated to add another 34mm flapper on an E316G thread, but I couldn't really find much info on this side of the pros and cons.

 

[Thomas91169]

i have the extremePSI evo16g with 34mm flapper and ported exhaust housing.

boost set to 20psi and stays there.

but then again i realized that boost creep is caused by crappy o2 housing, i got a tubular one from punishment racing.

my freind had creep on his 14b and was running 3" turboback no cat, then for the hell of it put the cat on, and got rid of creep. i also have my catalytic still in there, though thats coming out soon.

 

[RU2SLOW?]

What size downpipe do you have? That usually seems to make a difference. I think I've seen less creep on 2.5" dp & tp to 3" catback to setups from what I've been reading. It's usually a bit over 20psi that I'm hearing about these blowing open- have you ever tried to go above that level of boost?