Seconday Boost Issue.
#1
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Seconday Boost Issue.
Hey guys, I'm having trouble sourcing what seems to be a boost leak during the operation of the Secondary turbos [4500 rpm]. I've already conducted the autosportracetech boost test and I found that my Primary turbos are working fine -- boosts up to 10 PSI no problem -- but I've noticed that when I pass the 4500 RPM mark, right when the second turbos are suppose to kick in, the boost gradually goes down and nets less than 5PSI; it is also accompanied by loud whoosh (no, not the BOV) when the throttle is let off.
Can someone help me source this problem ? I've tried the majority of troubleshooting procedures on the autosportracetech site , and I'm stumped. Some say I need new spark plugs ? But I don't know, maybe, it's worth a try.
Can someone help me source this problem ? I've tried the majority of troubleshooting procedures on the autosportracetech site , and I'm stumped. Some say I need new spark plugs ? But I don't know, maybe, it's worth a try.
#4
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All clips are intact for both vacuum and pressure hoses ; I reinforced the hose with tie-wrap. I found that the pressure hose wasn't fully in, there was about 1 cm more to go in but I don't think that was the problem because the state the hose was in - is enough to receive boost pressure.
I'm gonna check if the hoses goes where its suppose to be - thank god we have the rats-nest diagram.
I'm gonna check if the hoses goes where its suppose to be - thank god we have the rats-nest diagram.
#5
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I've uploaded the sound it makes when I let off the throttle.
http://www.megaupload.com/?d=5XE0YM8I
You can hear the described whoosh sound at 0:02.
http://www.megaupload.com/?d=5XE0YM8I
You can hear the described whoosh sound at 0:02.
#7
Senior Member
iTrader: (10)
I had same issue for about 7 month hope it gave my engine nice break in time, my 3rd woudnt boost all the way and lost power but 1, 2nd was ok , after new Greddy pro racing plugs it boosted immediately and after couple street driving it was running very nice, Ryuji dont worry anees will help you
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#8
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I had same issue for about 7 month hope it gave my engine nice break in time, my 3rd woudnt boost all the way and lost power but 1, 2nd was ok , after new Greddy pro racing plugs it boosted immediately and after couple street driving it was running very nice, Ryuji dont worry anees will help you
thewird
#9
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I can not understand how plugs would make a whooshing sound.
https://www.rx7club.com/showthread.p...ight=secondary
https://www.rx7club.com/showthread.p...ight=secondary
https://www.rx7club.com/showthread.p...ight=secondary
https://www.rx7club.com/showthread.p...ight=secondary
Doubt this one - although that reminds me. Marco did you fix the issue with the car you had? I do not remember who's it was but you said it got boost ok in some gears, and not others....
https://www.rx7club.com/showthread.p...ight=secondary
Maybe this one
https://www.rx7club.com/showthread.p...ight=secondary
https://www.rx7club.com/showthread.p...ight=secondary
https://www.rx7club.com/showthread.p...ight=secondary
https://www.rx7club.com/showthread.p...ight=secondary
https://www.rx7club.com/showthread.p...ight=secondary
Doubt this one - although that reminds me. Marco did you fix the issue with the car you had? I do not remember who's it was but you said it got boost ok in some gears, and not others....
https://www.rx7club.com/showthread.p...ight=secondary
Maybe this one
https://www.rx7club.com/showthread.p...ight=secondary
#11
amemiya7
iTrader: (6)
I had same issue for about 7 month hope it gave my engine nice break in time, my 3rd woudnt boost all the way and lost power but 1, 2nd was ok , after new Greddy pro racing plugs it boosted immediately and after couple street driving it was running very nice, Ryuji dont worry anees will help you
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