bov adjustment confussion??

Post by **7o7drft240sx** » Sun May 31, 2009 8:24 am

yes i searched and im confuse on how to get rid of the "ch ch ch" shound from my bov..am i suppose to put it on hard or am i suppose to put it on soft?? ive searched and some ppl say soft and some say hard....which way is it suppose to go to get rid of the sound??

Post by **dc1984** » Tue Jun 02, 2009 6:23 am

im assuming this noise sounds like its coming from ur air filter. that would mean that ur blow off valve either isnt opening, or just isnt opening enough to let out all of the pressure so it has to go back through ur turbo and out ur air filter. not good for ur turbo. u need to figure out why ur BOV isnt working properly. chances are, u either dont have it hooked up to a proper boost/vacuum source or ur spring is set too stiff or it is just to stiff of a spring period and setting it softer wont help. some BOV's have different springs for different applicsations.what BOV is it?

Post by **rc1honda** » Tue Jun 02, 2009 10:06 am

Yeah that sound your hearing is compression surge. I would check my vac lines, then the very next thing i would do is get on ebay and buy a HKS SSQV it's self adjusting and sounds the best. I would also check my old BOV to make sure it;s not stuck closed.

Post by **7o7drft240sx** » Tue Jun 02, 2009 11:52 am

dc1984 wrote:im assuming this noise sounds like its coming from ur air filter. that would mean that ur blow off valve either isnt opening, or just isnt opening enough to let out all of the pressure so it has to go back through ur turbo and out ur air filter. not good for ur turbo. u need to figure out why ur BOV isnt working properly. chances are, u either dont have it hooked up to a proper boost/vacuum source or ur spring is set too stiff or it is just to stiff of a spring period and setting it softer wont help. some BOV's have different springs for different applicsations.what BOV is it?

i used the vacuum line on the top right of the throtle body for my bov and t' it to my boost gauge....the bov came wit the fmic kit i got frm ebay its made by cx racing it looks like the greddy rs....

rc1honda wrote:Yeah that sound your hearing is compression surge. I would check my vac lines, then the very next thing i would do is get on ebay and buy a HKS SSQV it's self adjusting and sounds the best. I would also check my old BOV to make sure it;s not stuck closed.

if i had enough money i would but i dont...

Modified by 7o7drft240sx at 3:03 PM 6/2/2009
Modified by 7o7drft240sx at 3:04 PM 6/2/2009

Post by **duffman1278** » Tue Jun 02, 2009 2:20 pm

Loosen up your tension, if it's a greedy remove one of the springs.

Post by **Justin35ll** » Tue Jun 02, 2009 2:37 pm

I have the s***ty knock off one too. I took the purple top off and took out one of the springs inside. Then I cut the other one in half and then adjusted it with the adjuster on the top. If I were you I would just take out one of the springs and then try adjusting it from there. Mine still surges a little, but it's working a lottt more then it was before

Post by **7o7drft240sx** » Tue Jun 02, 2009 6:59 pm

Justin35ll wrote:I have the s***ty knock off one too. I took the purple top off and took out one of the springs inside. Then I cut the other one in half and then adjusted it with the adjuster on the top. If I were you I would just take out one of the springs and then try adjusting it from there. Mine still surges a little, but it's working a lottt more then it was before

alrite ill try that thanks..does it matter on which spring i take out??

Post by **dc1984** » Tue Jun 02, 2009 11:33 pm

ive heard that u shouldnt tee off the line u use for ur BOV. there should be planty of sources to get a solo line for it of the intake mani area.

i had the same exact problem when i bought my blitz DD BOV off ebay. no matter how i adjusted it, i was still getting mad surge. so i went and bought an HKS BOV and shortly after, i found out that blitz makes two different springs for that BOV, a stifer one for higher boost apps, and a softer one for lower boost apps. sure enough, i had the stiffer one in there. coulda saved a couple hundred bucks. ohh well, now i have two good BOV's, im sure itll come in handy some day.

anyways, do what justin says and see if that does anything for u, sounds like its right on the money. let us know what happensgl

Post by **Justin35ll** » Wed Jun 03, 2009 8:49 am

7o7drft240sx wrote: alrite ill try that thanks..does it matter on which spring i take out??

I think I took out the inner one so the top piece would still sit nicely on the wider oneAnd I left my bov atmospheric too cause with the recirc line hooked up it was still fluttering

Post by **dc1984** » Wed Jun 03, 2009 9:13 am

Justin35ll wrote:
And I left my bov atmospheric too cause with the recirc line hooked up it was still fluttering

i think the main cause for that is when the tube used for the recirc is too small. i havent done it yet myself but ive heard that i decent sized tube is needed for recircing.

Post by **Justin35ll** » Wed Jun 03, 2009 2:42 pm

Yeah, I was thinking the same thing. The hose was about an inch in diameter I thought that would be wide enough, but maybe not oh well I don't have any stalling problems so it doesn't bother me

Post by **snake240** » Wed Jun 03, 2009 3:55 pm

dc1984 wrote:ive heard that u shouldnt tee off the line u use for ur BOV. there should be planty of sources to get a solo line for it of the intake mani area.gl

Ive always heard and read this as well. Its okay to t' the gauge to the fpr line. the bov needs a direct source.

Post by **dc1984** » Sat Jun 06, 2009 7:59 am

snake240 wrote:
Ive always heard and read this as well. Its okay to t' the gauge to the fpr line. the bov needs a direct source.

just make sure that if u do mess with the fpr line, that nothing comes off. if that hose comes loose then u wont get a rising fuel pressure under boost and u will run lean. and that can lead to unwanted damage.

gl

Post by **Justin35ll** » Sat Jun 06, 2009 12:47 pm

I have my bov tee'd with my wastegate, cause I don't have a seperate pressure source for the wg, but it works fine

Post by **dc1984** » Tue Jun 09, 2009 8:24 pm

Justin35ll wrote:I have my bov tee'd with my wastegate, cause I don't have a seperate pressure source for the wg, but it works fine

that doesnt sound right at all. ur wastegat line shouldnt have any vacuum in it. it should be just a boost source. ive always heard that vacuum can ruin ur wastegate. and im not sure about this but i always thought that a vacuum/boost line was needed for a BOV. u might want to look into this a little bit.

Post by **7o7drft240sx** » Fri Jun 12, 2009 4:31 pm

alright guys thanks for the help...unfortunately i couldnt solve the problem but i was lucky my friend gave me an hks bov so now i dont have that problem anymore...but i have one question..i drilled my hot pipe and insertedd a fitting for my wastegate is that fine?? heres the pic...........

Post by **snake240** » Fri Jun 12, 2009 5:23 pm

that will work.... as long as there is no leak from it.

Post by **7o7drft240sx** » Fri Jun 12, 2009 7:16 pm

snake240 wrote:that will work.... as long as there is no leak from it.

alright thanks

Post by **zach-Ka** » Sat Jun 13, 2009 3:48 am

This tread popped up in impeccable timing I am fixing my crappy BOV today.

Post by **DrifterProdigy85** » Sat Jun 13, 2009 1:10 pm

Just curious but has anyone actually messed up a turbo from compressor surge? I ran my old 2871R for 2 years with surging to 15psi and never any problems or visible wear. Ive ran my T04Z the same way for the past 1.5 years without a problem. Alot of supra guys run a tight bov and havnt seen any ill effects from there setups either. Some Grand Nationals ive seen dont even have a bov.

bov adjustment confussion??

bov adjustment confussion??

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