Is the car suppose to produce boost in park?

[bonnieblack96]

Can someone tell me if I have my car in park and is idling and I accelerate all to 4k is my car suppose to produce boost? my car is getting to 4k and bogging down is that normal?

[Franksdad]

Yea if it's in park it wont let you rev that high.

[bonnieblack96]

How can I determine if my supercharger is working? At idle I here rattling I was told this could be the coupler but I want to make sure before spending the forty bucks on the coupler kit that my supercharger isnt bad. Please help

[Franksdad]

Are you getting boost while driving? i dont have a supercharged bonnie nor do i know alot about them, but if you're driving and you get boost i'd assume its working. or a better question is why do you think it isnt working?

[bonnieblack96]

I am not sure. This is the first car I get that has a supercharger and I dont know how its suppose to work. If i am cruising at 75-80 am i suppose to maintain some kind of boost or no? I am not too mechanical so excuse the dumb questions and thanks for the replies.

[Jfridge92]

If your supercharger sounds like rocks rattling at idle, you most likely do have a bad coupler.

Try flooring it in gear and watch the boost gauge. If it goes up, your supercharger is working. There's really not a way for the charger itself to "not work" since it's mechanical, but there are a few sensors/valves that can fail and cause your boost to not work correctly.

Otherwise, that sounds completely normal. There's a park/neutral rev limiter that's usually set around 4-4500rpm that will bog down when you hit it. Change the coupler out and you should be good to go!

[bonnieblack96]

Ok thanks will do so.

[macksdaddy77]

no they dont produce boost in park. they redline at 4k aswell

[J Wikoff]

Hit the gas in drive. Does boost go to 5-10 psi and stay there until you let off the gas? Perfect. It won't show much for boost in park.

[bs009]

Easiest way to check the coupler is to remove the supercharger belt and rotate the supercharger pulley back and forth. If there is any slack then the coupler is loose and should be replaced.

A bad coupler won't stop the supercharger from producing boost unless it is completely destroyed. Usually they just loosen up over time.

You should only produce boost if your throttle is about 50% open or more. You shouldn't produce any while cruising unless you're going up a steep hill or something.

[BonnieBoy08]

Superchargers boost off of intake air, you're not shoving much air down its throat in park. Once you get some speed, different story lol. Sounds like a coupler to me.

[swampthing]

Like what everyone has said, the supercharger bypasses the boost when not needed, and the car rev limits at 4000 in park. At low throttle conditions such as cruising the boost is bypassed, if the car was receiving boost all the time under all throttle conditions it would get terrible gas mileage