Quote:
Originally Posted by Gardus@Supersprint
I can confirm that replacing the headers and the front pipe with pipe-only component often result in metallic vibration.
This can be cause both by heatshield rattle but it's often caused by the harmonic vibration of the pipes themselves.
Basically any long section of pipe with this engine cause the metallic rasp on liftoff and at certain rpm.
|
Thank you. I'm 99.9% sure that in my case the annoying resonance was the heat shields on the OEM over-pipe since replacing it eliminated the sound entirely.
One reason I posted about this is because I've seen many Borla header owners with stock over-pipes blaming similar noises on the header flex sections. I suggest that the stock over-pipe may well be the actual cause in some or all of these cases, as it was in mine.
Quote:
Originally Posted by FR-Sizzle
Get a tune first... free baseline dyno and when you get all your other bolt ons done itll make them perform much better and smoother.
If you get headers you will need to get a tune in the future regardless. The gains from a tune are the best option/route to go if you plan to get all basic bolt ons and to heavily mod it more.
If memory serves me right tunes also increase your MPG to which will save you gas and eventually pay it off after a long time but still good nonetheless. So the earlier you get a tune the more you save. Along with slightly better sounds from the engine, good gains, and extra goodies like revving to higher RPM's and things like launch control.
|
If you're addressing me, I already have a tune. I posted my before/after tune dyno results on the first page. Although the car ran flawlessly with the header and no tune, it did gain a few more ponies with the tune. As for increased fuel economy from a performance tune, I don't think it's very likely. I've certainly never seen it happen in recent years now that the OEM's already wring out every last mpg.