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Old 08-22-2005, 01:30 AM   #1
GonnaDie4TheGov
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Part Name?

I can't remember the name of this part that like 2 hours ago i was having an entire conversation about . Its the part that makes that high pitched air release sound in a car when shifting. I was informed that you can get these for automatics now and if it was a decent price i would maybe buy one..only b/c it sounds nicer. Please help me if you know the name and/or who makes one for an auto trans?
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Old 08-22-2005, 01:31 AM   #2
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Blow-off valve?....
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Old 08-22-2005, 01:35 AM   #3
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thats it!!!!! that was bothering me so much that i couldn't remember
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Old 08-22-2005, 02:07 AM   #4
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the blow off valve(BOV) doesn't make a noise when you shift gears, it releases boost into the atmosphere from a forced induction engine when releasing the throttle.

the whole process for releasing boost with a BOV also involves a dump pipe, what happens is the boost from the turbo, flows through the dump pipe, hits the closed up butterfly wall from the throttle body, then it doubles back through the dump pipe into the now open butterfly wall from the BOV and releases into the atmosphere.

basically, a BOV isn't just for show, it's actually a helpful instrument when it comes to an engine with forced induction, a piston blow off valve is actually recommended for high powered turbo/supercharged cars.

most of japans high powered drag cars and street cars have piston BOV's with high powered HKS Turbo's, it's actually quite interesting when you start to learn about it.
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Old 08-22-2005, 02:09 AM   #5
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Quote:
Originally Posted by GonnaDie4TheGov
I can't remember the name of this part that like 2 hours ago i was having an entire conversation about . Its the part that makes that high pitched air release sound in a car when shifting. I was informed that you can get these for automatics now and if it was a decent price i would maybe buy one..only b/c it sounds nicer. Please help me if you know the name and/or who makes one for an auto trans?

HKS, GReedy, GO FAST BITS, BLITZ etc... they'll all supply an 'automatic' BOV, all BOV's fit anything, the transmission has nothing to do with it really, just aslong as you have a engine with a forced induction then you can have a BOV.

you can also get a Compression Release Valve (CRV), it just releases high compression combustions into the atmosphere, it's the same basic concept as a BOV.
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Old 08-22-2005, 02:17 AM   #6
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Quote:
Originally Posted by HyundaGuy
HKS, GReedy, GO FAST BITS, BLITZ etc... they'll all supply an 'automatic' BOV, all BOV's fit anything, the transmission has nothing to do with it really, just aslong as you have a engine with a forced induction then you can have a BOV.

you can also get a Compression Release Valve (CRV), it just releases high compression combustions into the atmosphere, it's the same basic concept as a BOV.

Well i have a 4 cylinder 96 accord auto...which one do you recommend for mine? Also price?
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Old 08-22-2005, 02:18 AM   #7
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Quote:
Originally Posted by HyundaGuy
the blow off valve(BOV) doesn't make a noise when you shift gears
- so what makes the noise then?
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Old 08-22-2005, 02:20 AM   #8
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Quote:
Originally Posted by GonnaDie4TheGov
Well i have a 4 cylinder 96 accord auto...which one do you recommend for mine? Also price?

has it got a forced induction? if not, is the c/r over 13:1?
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Old 08-22-2005, 02:21 AM   #9
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Originally Posted by windsonian
- so what makes the noise then?

is boost passing through the blow off valve, so technically, the BOV doesn't make the noise, the boost passing through it does, therefore, the four stroke cycle makes it from goin' through the turbo, through the dump pipe, double backing up through the BOV.

in other words, the BOV helps release the boost into the atmosphere, in the process it makes a PHIIISSS sound.
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Old 08-22-2005, 02:26 AM   #10
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Quote:
Originally Posted by HyundaGuy
has it got a forced induction? if not, is the c/r over 13:1?

I am semi-new to working on cars...what is forced induction? though now you prob think im an idiot lol
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Old 08-22-2005, 02:43 AM   #11
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Now come to think of it when my and friend were talking about intake i believe he said my car is a forced induction, thats why i can use a ram air or something...it was like 2 or 3 months ago
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Old 08-22-2005, 04:05 AM   #12
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Quote:
Originally Posted by GonnaDie4TheGov
Now come to think of it when my and friend were talking about intake i believe he said my car is a forced induction, thats why i can use a ram air or something...it was like 2 or 3 months ago
What in the hell was your friend talking about lol There are no Accords (or pretty much any Honda for that matter) that are force inducted from the factory.

A car with forced induction is a car that has a blower (basically a huge supercharger), supercharger, or a turbocharger.
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Old 08-22-2005, 04:08 AM   #13
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Quote:
Originally Posted by HyundaGuy
has it got a forced induction? if not, is the c/r over 13:1?
Im pretty sure his car (since its stock) doesnt have a forced induction system on it. Or high compression for that matter. If he wants to turbo charge his car, he needs to start with the basics (i.e. cold air intake, header, exhaust system, etc.) He'll also have to get a better ECU.
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Old 08-22-2005, 04:23 AM   #14
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Originally Posted by SlipKnoT
Im pretty sure his car (since its stock) doesnt have a forced induction system on it. Or high compression for that matter. If he wants to turbo charge his car, he needs to start with the basics (i.e. cold air intake, header, exhaust system, etc.) He'll also have to get a better ECU.

I have ram air intake, im getting headers, and a muffler...the rest of the exhaust is brand new so im not even gonna bother to change it. If i need anything else then w/e im not gonna worry about it. I jsut thought it might be something different
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Old 08-22-2005, 04:26 AM   #15
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Originally Posted by GonnaDie4TheGov
I have ram air intake, im getting headers, and a muffler...the rest of the exhaust is brand new so im not even gonna bother to change it. If i need anything else then w/e im not gonna worry about it. I jsut thought it might be something different
You could get a small turbo set up from Turbonetics for a reasonable price. It would only put out about 6-8psi. It would add about 40+hp.
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