04-18-2016, 08:38 PM | #169 | |
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Based on your gains you are getting exactly as advertised power. Are you on the stock MAP sensor? If you are that probably explains it. It loses resolution after 5 psi I hear. Maybe you are losing boost pressure due to some valve overlap? |
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04-18-2016, 08:43 PM | #170 | |
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Jackson Racing C38-81 Supercharger - CARB legal
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Nope, we upgraded the map sensor. We checked intercooler piping and all hoses that could cause a leak. Everything checks out. Car runs strong, just not getting up to 9psi. |
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04-18-2016, 10:40 PM | #171 |
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Figured of the issue. The bypass valve doesn't hold the boost past 7psi.
Had a turbo smart bpv that I had from another car so threw it in and boost is now 9-9.5psi Sent from my iPhone using Tapatalk |
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04-18-2016, 10:43 PM | #172 |
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Was thinking that was low with that header
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04-19-2016, 01:27 AM | #173 | |
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Wait so the C38 bypass valve won't hold over 7psi? Meaning it's restricting potential power at 9psi or did I misunderstand? |
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04-19-2016, 01:29 AM | #174 |
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04-19-2016, 09:46 AM | #175 |
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Guessing it's just a faulty BPV. I'm sure others are working fine and holding past 7psi.
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04-19-2016, 11:56 AM | #176 |
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It's pretty common for those BPVs to fail. They're some cheap Volkswagen crap that JR/KW use on all their kits. Upgrading to a metal unit from a reputable source is a common practice for Rotrex kits on other platforms.
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04-19-2016, 12:20 PM | #177 |
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I would imagine I've seen more of these kits than anyone else, and I've yet to see a bypass from the JR kit fail without a good reason (e.g. bad removal on a used kit).
If for some reason yours DID fail (never say never), then @Jackson Racing will gladly replace your unit; their warranty is solid. |
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04-19-2016, 12:39 PM | #178 | |
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04-19-2016, 12:39 PM | #179 | |
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04-19-2016, 12:43 PM | #180 | |
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also knew something was up when we were tuning and i was making about 20whp less than similar setups. |
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04-19-2016, 03:10 PM | #181 | |
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Alternatively, an external boost gauge would also catch it. Most people probably wouldn't notice the loss of power unless they had a fully functional, but identical car for comparison. |
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04-19-2016, 04:36 PM | #182 | |
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