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Forced Induction Turbo, Supercharger, Methanol, Nitrous


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Old 09-21-2020, 02:41 PM   #3907
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Originally Posted by Smaay View Post
When under full boost it sounds like the bypass valve is open, how is that possible? if its under spring tension? What is causing the P0171 codes? its all metered air going in so whats making the lean condition?
So if doesn't close.. as pointed out.. you will have a leak and a lean condition. I understand and agree it's a lot riding on a inexpensive part.
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Old 09-21-2020, 03:59 PM   #3908
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Should the coolant expansion tank for the supercharger be on the MAX line when it’s cold, or should it be in the middle on a cold engine?
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Old 09-21-2020, 06:42 PM   #3909
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Should the coolant expansion tank for the supercharger be on the MAX line when itís cold, or should it be in the middle on a cold engine?
My understanding was that it should be just below the middle line on a cold engine. You want enough in there that it circulates properly on a cold start, but has room for overflow during hard driving.
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Old 09-21-2020, 08:45 PM   #3910
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i figured as much. thanks. i had to add a teensy bit.
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Old 09-21-2020, 10:53 PM   #3911
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so I finally shined a light under the runners, I have the 3 bolt bypass valve. If I pull off the hose at the manifold and suck on it, the valve doesnt budge and I can suck in quite easily. I attached the hose and at idle I can see the valve get pulled open. If I pinch the hose the valve immediately closes. Based on the post 2368 I have a huge leak in the diaphram. This is the source of my P0171. The fuel trims are like 40%.



So I need to fix that first.
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Old 09-22-2020, 12:01 AM   #3912
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I've been reading that edelbrock changed to a dry air filter. Does anyone have a part number for it?

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Old 09-22-2020, 03:44 PM   #3913
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I received my kit today. Looks like the updated K&N PN is SP3737, Edelbrock PN 51-0157.
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