Slippi84 said:

I don't consider 20 psi high seeing how my goal is 45psi on my current setup and my old setup was tuned for 25psi daily Not to mention not all diesel's run that high.

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My dad's Ford F-350 runs close to 40psi with a chip and intake.. *cough* Oh and he drives it everyday. Not to mention the fact that the new Ford's run around 25psi in stock-form.

jrohner said:

Yeah, if 60-100psi is what you consider low (the insanely powerful diesels in pulling and racing).

The boost level means nothing on the diesel though, since diesels have no throttle and have no vacuum. They use a vacuum pump to run vacuum accessories and their fuel delivery, not a throttle, controls rpm.

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I know the cat in my dump truck is at 32psi god do I love that 550 horses when loaded with 20 ton of rock.

toofast82 said:

I was curious if any of the guys with auto trannies have eliminated the bov and put a blockoff plate in there? This would eliminate any potential boost leaks from the bov. I never see any other auto turbo cars with them anyway.

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I don't know why you would want to....why don't you ask this guy:

http://www.dsmtuners.com/forums/dra...o-iii-16g-stock-automatic-no-intercooler.html




He's obviously knows what he's doing- he's gone 10's with a 16G and no intercooler.



Don't forget.....just because you're not seeing a BOV / CBV on the intercooler piping of a certain car doesn't mean it's not there. Some European cars have the CBV right on the turbo:

Celica All-Tracs do not have BOV and I've seen MANY lightly modded turbo desiels run upwards of 45 psi. You can block off the BOV if this is a track only drag car, run low boost, or don't care about your turbo spitting it's guts.

well, guess what guys, all the hx35s you guys are throwing on used, was at least run at 20psi and maybe up to 40psi, with no bov for who knows maybe 200k, maybe 300k miles? And yes they really do have no shaft play. Grand nationals, typhoons, and every diesel truck out there without a bov. And those semis, they operate at like 40psi. I dont know, I do believe some diesels may have throttle plates but many do not.
Kevin gst, im sayin that because your brake booster vacuum goes to your intake manifold. i dont care what response i get, im not going to lose sleep over having to run my bov.

Ever since i went to speed density and dont recirc the bov. i get alot of compressor despool noise and dont hear it venting. I also had another bov that i crushed a little too much and it barely opens but doesnt leak. I was driving with that for awhile and didnt cause any shaft play.

And also, Thumbs up to the car with no intercooler and 10sec timeslips. Thats insane! Very effective use of parts with factory manifold, o2 housing, intake manifold and 16g. Some people have more money invested in their big tubular t4 manifold than this car does in mods probably only to have slower timeslips. And oh, its automatic, stock automatic!

my friends subaru legacy has well over 200k on the clock, and has no bov.

still running strong

BigSorn said:

my friends subaru legacy has well over 200k on the clock, and has no bov.

still running strong

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You're sure about that? What year is this BOVless Legacy?

Red97Eclipseboy said:

You're sure about that? What year is this BOVless Legacy?

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92

Just a FYI, Dodge Shadows come without a BOV.
So yes, car's don't NEED BOVs

block it off and let us know how it works out for ya.

Eliminating the BOV makes no sense at all. That surge that isnt being released is bound to mess the car up

dazzellerr said:

block it off and let us know how it works out for ya.

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its gunna turn out horrible

yes, on a 5spd i believe it would be quick destruction of the turbo, but im talking about auto where there is no instant rpm drop

I know. i still think its not a great idea but you could go ahead and try. Its not reccomended in any way though. Is it a stock BOV? if so it shouldnt be a big deal if its there regardless.

Its a stock one and they are prone to leak at high boost levels(yes i know i could do the doge mod). I had a overly crushed one that i ran for awhile, that held boost better but didnt really open imho with no ill effects on the turbo. There were numerous cars that were listed that did not run a bov. I was just curious if any dsm auto guys have done this. I know outside the import world it is pretty common. Theres a lot of semi trucks out there.

yeah thats true but i would only say dont do it becaues dsm's are fragile and prone to break if you mess with it too much or eliminate something like that. how many psi is your turbo putting out? that would make a differance too

toofast82 said:

well, guess what guys, all the hx35s you guys are throwing on used, was at least run at 20psi and maybe up to 40psi, with no bov for who knows maybe 200k, maybe 300k miles?

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Again...No throttle on a diesel. The whole point of the BOV is that when the throttle plate closes, the air has to go somewhere. The closest thing to a throttle on a diesel is in the exhaust not the intake, and it's used to slow down faster and to save on the brakes (and/or to increase exhaust back pressure to warm up a cold engine faster). A diesel engine itself doesn't even have vacuum to open a BOV.

Seriously, how can this thread keep going? And I can't even figure out why am I replying, especially more than once.

Because OP still thinks that because it's an automatic that RPM's have anything to do with it. Apparently it's got nothing to do with this:
Full boost through open throttle body
Throttle body closes- full boost meets wall... where's boost gonna go?

Just do it already and post up the results so we can quit talking about the "what ifs". I think you woulda done it already if you didn't think, yourself, that it was a bad idea. Resorting to grade school taunts... because this thread is pitiful.
If ye scared, say ye scared... chicken. I dare you, you won't do it.

I'm not scared, i was just curious if anyone does it because "I know" outside of the dsm world this is done. Im not scared because if my turbo blows, I can actually do the work myself and not take it to a shop like Kevin GST ( who thinks his brake booster hose goes to his bov, oh he wasnt sure because he has been under his hood in awhile). My discussion wasnt if it will cause destruction of the turbo, just if any dsm auto guys do this. Kevin gst- amount of posts do not equal wrench time my friend

toofast82 said:

not take it to a shop like Kevin GST ( who thinks his brake booster hose goes to his bov, oh he wasnt sure because he has been under his hood in awhile). Kevin gst- amount of posts do not equal wrench time my friend

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Look at the post above his. He was referring to the post above his where the other guy said you could turn the key off. This is why people need o use the quote function.

toofast82 said:

Im not scared because if my turbo blows, I can actually do the work myself and not take it to a shop like Kevin GST. Kevin gst- amount of posts do not equal wrench time my friend

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Take 1992awdlaser's advice. I guess your car is an exception, but I lose substantial braking power when I kill the ignition. While your at it... look again closely at my post count and then look when I joined. Yeah, 299 since early 2003... sure... I spend all my time on forums wasting my time saying dumb stuff. I had a 95 gst that I'd owned since '97 before I got this car. It had a 6bolt swap and a bunch of other stuff... only touched by a shop for alignments. Just like the gsx I've got now. Educate yourself and don't make stupid assumptions. This is the only shop I use and this is what I am working on now:

I will agree, i read your profile and you do have a great setup no doubt! Good luck on the build! Good job on doing the work yourself! The reason I started the topic is because I had never seen this on an auto dsm, but many other turbo auto cars. I was just curious if anyone does this. I had never seen a dsm bov block off and wanted to know if anyone sells these(yeah i know it could be easily fabbed up)

kevingst said:

Take 1992awdlaser's advice. I guess your car is an exception, but I lose substantial braking power when I kill the ignition. While your at it... look again closely at my post count and then look when I joined. Yeah, 299 since early 2003... sure... I spend all my time on forums wasting my time saying dumb stuff. I had a 95 gst that I'd owned since '97 before I got this car. It had a 6bolt swap and a bunch of other stuff... only touched by a shop for alignments. Just like the gsx I've got now. Educate yourself and don't make stupid assumptions. This is the only shop I use and this is what I am working on now:

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That is one extremely good looking block!