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SVTPerformance's Chain of Restaurants
Tuning À la carte
How should I tune around a compressor surge?
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<blockquote data-quote="robert presti" data-source="post: 15291658" data-attributes="member: 175530"><p>Today I thought maybe the bypass is not in a good spot. The bypass is in front of the intercooler which I would think is the worst place. I would think as close to the maf as possible to avoid the spring effect, but maybe it doesn't matter when the bypass valve is just to small any way. I checked and the bypass is working as it should. Even with the bypass working the way the supercharger is set up there is a lot of pressure around 2000 rpm. This was causing idle issues that I think are gone now. Set the isc and dashpot to near nothing. The IAC Is fed through the pipes subject to surge rather than the atmosphere. which is not ideal either. Engine is set to idle with no IAC flow and TPS voltage set to base reading.</p><p></p><p></p><p>This wasn't the answer. Not enough air flow for cold starts, but is great when warm. I don't know how many times I'll try to get the numbers right to prevent the hanging idle issue. All I know is there is no issue when I feed the IAC to atmosphere, rather than the intake tube. Might try a one way check valve to prevent air being forced through the IAC.</p></blockquote><p></p>
[QUOTE="robert presti, post: 15291658, member: 175530"] Today I thought maybe the bypass is not in a good spot. The bypass is in front of the intercooler which I would think is the worst place. I would think as close to the maf as possible to avoid the spring effect, but maybe it doesn't matter when the bypass valve is just to small any way. I checked and the bypass is working as it should. Even with the bypass working the way the supercharger is set up there is a lot of pressure around 2000 rpm. This was causing idle issues that I think are gone now. Set the isc and dashpot to near nothing. The IAC Is fed through the pipes subject to surge rather than the atmosphere. which is not ideal either. Engine is set to idle with no IAC flow and TPS voltage set to base reading. This wasn't the answer. Not enough air flow for cold starts, but is great when warm. I don't know how many times I'll try to get the numbers right to prevent the hanging idle issue. All I know is there is no issue when I feed the IAC to atmosphere, rather than the intake tube. Might try a one way check valve to prevent air being forced through the IAC. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Tuning À la carte
How should I tune around a compressor surge?
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