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Wastegate spring on '03 Spec V
01-03-2008, 12:54 PM
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Turbonetics Enthusiast
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Join Date: Feb 2007
Location: Queens, NY
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Wastegate spring on '03 Spec V
How much lbs of boost does the wastegate spring allow on a kit for an '03 spec v? I ask because I recently installed a 3" turbo back piping setup and boost went up to 10lbs.
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'03 Spec-V --> TN powered, JWT BSR, UR Pulley, Catless, APEXi WS2, Tein SS Coilovers, ES MMI's, 4 Pt. Lower Tie Bar, SAFC II, Wilwood BBK, TWM SS, 18" Racing Hart C5's..and then some..
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01-03-2008, 01:25 PM
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9psi, and after pressure drop across the intercooler core you should see 8-8.5psi.
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01-03-2008, 01:27 PM
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I'm running a custom manifold and 3" dp/midpipe/catback and I'm seeing 10psi currently. I changed the manifold and dp & midpipe first and was seeing 8-8.5, but when I installed the 3" catback, it instantly went up to 10psi...any ideas?
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Originally Posted by mjeffries
9psi, and after pressure drop across the intercooler core you should see 8-8.5psi.
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__________________
'03 Spec-V --> TN powered, JWT BSR, UR Pulley, Catless, APEXi WS2, Tein SS Coilovers, ES MMI's, 4 Pt. Lower Tie Bar, SAFC II, Wilwood BBK, TWM SS, 18" Racing Hart C5's..and then some..
QR25DE.net
B15NYC.com
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01-04-2008, 09:45 AM
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Turbonetics Owners Club Staff
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Join Date: Jun 2006
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Yes I know why. When the exhaust backpressure dropped as a result of the exhaust change the turbine became more efficient and the wastegate is having a tougher time keeping the boost in check. Its not uncommon and in fact most factory turbo cars switch to a bigger exhaust with the intent of making this happen. All that being said if your AFR is looking good I wouldn't worry about it too much..
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01-11-2008, 09:41 AM
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Turbonetics Staff
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Ashwin if you are concerned you can always get the 7psi spring from us. I believe I have helped you in the past here at Turbonetics. If you do need the 7psi spring the part number is 30778-7 and retails for $26.39. You should be ok with what you have but just in case at least you have another option to look at.
Ed @ Turbonetics
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-2003 LEMANS SUNSET TURBONETICS 350Z-
-2006 POLAR WHITE SCION XB-
"You can take the New Yorker out of NY, but you'll NEVER take NY out of the New Yorker"
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01-11-2008, 01:06 PM
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Turbonetics Enthusiast
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Join Date: Feb 2007
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Hey Ed, yup you've helped me quite a few times lol. I'm getting a Boost controller, so that should help. Thanks for the tip on the spring though...
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Originally Posted by Ed 718
Ashwin if you are concerned you can always get the 7psi spring from us. I believe I have helped you in the past here at Turbonetics. If you do need the 7psi spring the part number is 30778-7 and retails for $26.39. You should be ok with what you have but just in case at least you have another option to look at.
Ed @ Turbonetics
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__________________
'03 Spec-V --> TN powered, JWT BSR, UR Pulley, Catless, APEXi WS2, Tein SS Coilovers, ES MMI's, 4 Pt. Lower Tie Bar, SAFC II, Wilwood BBK, TWM SS, 18" Racing Hart C5's..and then some..
QR25DE.net
B15NYC.com
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01-14-2008, 12:59 PM
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Turbonetics Staff
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Join Date: Sep 2006
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Anytime Ashwin you need help you can either PM or email me. Also where is my Carlos Delgado NY met Jersey you promised wise guy? 
__________________
-2003 LEMANS SUNSET TURBONETICS 350Z-
-2006 POLAR WHITE SCION XB-
"You can take the New Yorker out of NY, but you'll NEVER take NY out of the New Yorker"
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