Lexus IS350 06-07 Prostreet S/C Kit
10-02-08, 11:58 AM
#211
iSuxeL & KMRIS350 do I have this correct??
Is this sucking through the MAF? With this set up does the BOV discharge go anywhere between the MAF and Supercharger inlet or outlet??
10-02-08, 02:33 PM
#213
That's exactly how the set up is. My custom tensioner pulleys are just made different sizes and out of 6061 aluminum to reduce some weight but I don't think that matters in this case. So with this setup do we still need to recirc the discharge synapse??
10-02-08, 03:02 PM
#214
So you added a couple of pulleys on the bracket to help the belt wrap on on the S/C pulley?
I'm not sure on the BOV recirculation air, waiting for Synapse to reply. But I thought that you do not need it unless your getting some stalling.
I'm not sure on the BOV recirculation air, waiting for Synapse to reply. But I thought that you do not need it unless your getting some stalling.
Last edited by GILLEXUS; 10-02-08 at 11:27 PM.
10-02-08, 09:03 PM
#216
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From the BOV directions with the current setup in the picture a couple of posts back there is no need to recalculate. I had a couple of tuners ride with me and they said it will help if the car is stalling. Like I said in my first post about this issue. Mine ONLY does it when sitting in parked and I rev it high and let off. So basically parked…slam the gas BOV does its big swooooosh and let off. It will drop in RPMS for a slight sec and bounce back up. It has not stalled but it gets kinda close some times. I honestly don’t do it that much just to kinda show the guys what the BOV sounds like. Driving its not a issue at all.
10-03-08, 09:59 AM
#219
bypass valve > blow off valve
http://en.wikipedia.org/wiki/Blowoff_valve
BOV= car makes ricey sound.
Bypass valve= car actually works properly.
http://en.wikipedia.org/wiki/Blowoff_valve
BOV= car makes ricey sound.
Bypass valve= car actually works properly.
The unique sound caused by a blowoff valve (but not a compressor bypass valve) sometimes comes at a price. On a car where the blowoff valve is mounted after the mass airflow sensor, venting to atmosphere confuses the engine control unit (ECU) of the car. The ECU is told it has a specific amount of air in the intake system, and injects fuel accordingly. The amount of air released by the blowoff valve is not taken into consideration and the engine runs rich for a period of time. Engines with a manifold absolute pressure regulated ECU or where the blowoff is mounted upstream of the MAF sensor are not affected.
Typically this isn't a major issue, but sometimes it can lead to hesitation or stalling of the engine when the throttle is closed. This situation worsens with higher boost pressures. Eventually this can foul spark plugs and destroy the catalytic converter (when running rich, not all the fuel is properly burned in the cylinder which can allow unburned fuel to combust upon contact with and melt the converter or to cause incompletely combusted fuel to leave heavy carbon deposits).
10-04-08, 01:58 AM
#221
Disadvantages
The unique sound caused by a blowoff valve (but not a compressor bypass valve) sometimes comes at a price. On a car where the blowoff valve is mounted after the mass airflow sensor, venting to atmosphere confuses the engine control unit (ECU) of the car. The ECU is told it has a specific amount of air in the intake system, and injects fuel accordingly. The amount of air released by the blowoff valve is not taken into consideration and the engine runs rich for a period of time. Engines with a manifold absolute pressure regulated ECU or where the blowoff is mounted upstream of the MAF sensor are not affected.
Typically this isn't a major issue, but sometimes it can lead to hesitation or stalling of the engine when the throttle is closed. This situation worsens with higher boost pressures. Eventually this can foul spark plugs and destroy the catalytic converter (when running rich, not all the fuel is properly burned in the cylinder which can allow unburned fuel to combust upon contact with and melt the converter or to cause incompletely combusted fuel to leave heavy carbon deposits).
The unique sound caused by a blowoff valve (but not a compressor bypass valve) sometimes comes at a price. On a car where the blowoff valve is mounted after the mass airflow sensor, venting to atmosphere confuses the engine control unit (ECU) of the car. The ECU is told it has a specific amount of air in the intake system, and injects fuel accordingly. The amount of air released by the blowoff valve is not taken into consideration and the engine runs rich for a period of time. Engines with a manifold absolute pressure regulated ECU or where the blowoff is mounted upstream of the MAF sensor are not affected.
Typically this isn't a major issue, but sometimes it can lead to hesitation or stalling of the engine when the throttle is closed. This situation worsens with higher boost pressures. Eventually this can foul spark plugs and destroy the catalytic converter (when running rich, not all the fuel is properly burned in the cylinder which can allow unburned fuel to combust upon contact with and melt the converter or to cause incompletely combusted fuel to leave heavy carbon deposits).
10-06-08, 07:05 PM
#223
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