Hey guys, just got my exhaust installed, sounds good. Also got a forge SPLIT-R! I remember reading about a resonance that occurs in a specific spot during the RPM range, and its normal. I think what I'm getting could be it, but I want to make sure.
Basically while letting the RPMs slow me down I get a nice rumble under the seat, a slight gurgle in the exhaust and a chatter/flutter from the splitter valve. This only occurs from 2400 to 2200 RPM and I get no warning lights. Any idea what the problem might be? At first I thought it was just the right frequency to rattle the car a little, but now that the splitter is sounding off too, I'm skeptical. The valve sounds a little like a bell being rung, but someone's holding onto the outside of the bell, so it doesnt reverberate. Just a higher pitched, clink clank clink.

Forge said the valve with rattle a bit and release boost at part throttle, and it does, but this only occurs at the above RPMs, only while engine braking and only in conjunction with the exhaust.

 

Really? No one has any comments to make?

 

Bump bump bump!!!!

 

any vid of the exhaust? sound and stuff like that hehe

 

I'll try to get one up. I was listening closer and now I'm thinking it might be exhaust hangers that were just cut off instead of removed.

 

Replace it with a TT DV and the noise will be gone.

Is it adjustable? Try running it at full recirc and seeing if the noise goes away.

 

Does the sound from the valve sound like blowing over the top of a bottle?

 

Not quite, it just vibrates under my seat for a short moment, like running over a lot of small, mild rumble strips.

 

Is it adjustable? Did you try to adjust it?

 

I ignored it for awhile and it got better, but now at like 3k rpms something resonates bad. It sounds like a hole is ripped in the exhaust and its LOUD. Right under the passenger seat, sometimes. Its off and on.