Toyota MR2 Message Board - View Single Post - 4A-GZE MK1 Engine Supercharger questions

englishmike · 10-26-2009, 03:36 PM

Supercharger questions

Being a new mr2 sc owner I have a few questions re the supercharger.

1. My mr2 has the bypass valve blocked, I believe this is due to sustain a higher boost level. Howcome there is a bypass valve fitted at the toyota factory in the first place?

2. How do I know if my supercharger has an upgraded pulley fitted?

3. What companies sell uprated supercharger pulleys and a matching belt?

4. My supercharger dashboard light is coming on whenever I press on the gas pedal. Someone has retrofitted a switch under the dash that is supposed to make the supercharger active all the time or just run at over 4000rpm. Has anyone heard of this? When I flick the switch either way, nothing seems to happen to the way the car drives. I can hear the SC at over 4000k under hard acceleration.

Is the purpose of the switch to disengage the electromagnetic clutch on the supercharger input shaft?

How can I remove this mod and how can I get the SC light to come on correctly? Could the light have anything to do with the throttle sensor?

10-26-2009, 03:36 PM	#1 (permalink)
englishmike Some Skills Join Date: Sep 2009 Location: Birmingham, Alabama Posts: 85 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Supercharger questions Supercharger questions Being a new mr2 sc owner I have a few questions re the supercharger. 1. My mr2 has the bypass valve blocked, I believe this is due to sustain a higher boost level. Howcome there is a bypass valve fitted at the toyota factory in the first place? 2. How do I know if my supercharger has an upgraded pulley fitted? 3. What companies sell uprated supercharger pulleys and a matching belt? 4. My supercharger dashboard light is coming on whenever I press on the gas pedal. Someone has retrofitted a switch under the dash that is supposed to make the supercharger active all the time or just run at over 4000rpm. Has anyone heard of this? When I flick the switch either way, nothing seems to happen to the way the car drives. I can hear the SC at over 4000k under hard acceleration. Is the purpose of the switch to disengage the electromagnetic clutch on the supercharger input shaft? How can I remove this mod and how can I get the SC light to come on correctly? Could the light have anything to do with the throttle sensor?