the APS tbe on STi's shoots crazy flames with a bov. me n my friend w/ an 06 sti got about a 6' flame out of it. APS=$$$$=performance=awesome. he also got a 13.2 in the 1/4 mile all stock w/ tbe n bov on an uphill track w/ headwinds at like 10mph. pretty cool.

 

which bov?

 

APS != $$$$. I got my 3" TBE for $997.00, one of the least expensive full SS TBEs on the market. Everything APS makes is mid- to low-priced, even the more exotic pieces like tumbler delete valves. The only thing they make that seems overpriced is their TMIC ($800.00). Oh, and full-atmospheric BOVs will eventually cost your friend that motor. Enjoy it while it lasts!

 

But if he has the APS bov, he should be safe. The APS bov is not 100% atmospheric. The primary vent is recirculated, and the smaller secondary vent (which only operates under high boost) is atmospheric. I haven't heard about anyone having a problem with this bov yet.

 

is this true? anyone

 

http://www.airpowersystems.com.au/wrx/blow.htm

Dual-stage BOVs are indeed safer than atmospheric, but won't produce the sound people want (this one won't "phhsssttt" at all on a stock motor running stock boost; you have to be running quite a bit more boost than stock to get it to go off).

 

I got my APS top mount for $695 brand new . You can adjust the APS bov too.

 

hks ssq

 

Really? is this just because it doesnt re-circulate the air.... since you have to put the plug thing it... i never knew it could cost you and engine

 

Well, I'm exaggerating slightly. A full-atmospheric BOV can cause your engine to run excessively rich, because you are letting out air that has already been compensated for in the A/F mixture by the ECU according to its measurements at the MAF. If you've got a host of other badly-planned mods (say, a manual boost controller turned up too high, the 3/16th mod, a CAI) all of those together can cause enough knock and other trouble to burn a valve or a piston ring. The reason I'm wary about this is that for some reason, people with the full-atmospheric BOV are also likely to have the other cheapo, dangerous mods as well, because those mods are really common in the Civic/Acura modding scene.