Re: MPI whistle--How loud is yours?
Thanks for all of the ideas so far...
I was thinking that it would be good if I wrote up a better description of the situation under which it does whistle, so here it goes:
It starts to whistle after about 2-3 minutes after the engine is started. The whistle increaces in pitch with the rpm's. My engine RPM's haven't slowed down yet so every time I let it idle the RPM's go up. It whistles the most when not in gear while idling, and at a higher pitch b/c of the high RPM's. It doesn't whislte much at all in gear, but it does when it is in gear and I don't have my foot on the pedal. It also whistles a little in 5th gear when I have my foot on the pedal, but not as much as when I don't have my foot on it.
the flex tube that came with the kit was torn up so I replaced it with a pvc pipe and used soem rubber joints with pipe clamps to hold everything together to the aluminum pieces included with the kit. The pvc pipe is just a 45 degree bend, not a elbow. It has a nice gradual curve instead of a sharp turn like an elbow would. I used 2" pipe to join the bend to a coupler. I did leave in the rubber 90 degree bend that comes off the intake manifold that came with the kit. If I had a digital camera I'd take a picture of the whole thing to show.
Because the whistle changes pitch with the increace in rpm's makes sense to me, but why it doesn't whistle while in gear with my foot on the pedal does not.[img]/wwwthreads_images/icons/crazy.gif[/img].
My thought is to take the air filter off of the tube and connect it more directly to the intake manifold with on of the rubber cupler joints I have been using for the intake tube. So far that is my only idea besides putting a cut piece of pvc in the tube, paralell to the airflow, to split the airflow in two. My thinking here is to disrupt the airflow enough to stop the whistle.[img]/wwwthreads_images/icons/tongue.gif[/img] I have also thought to do the entire pipe with 2"pvc and get rid of all of the stuff that came with the kit except for the aluminum piece that the filter attaches to. What do ya'll think.
4.2 w/<font color=blue>(4.0 head & MPI)</font color=blue>
Process of a moonguy after beer
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