LTH with HFC + CBE = ?

SS_Firehawk

It does between 2000 and 2300 rpm. It isn't bad off throttle, but noticeable when accelerating in a higher gear such as 4th, 5th or 6th. You can hear the drone in the video where I drive it around the block. It's at the end of the video where I'm coming off the highway going downhill. I try and show the drone. I usually just throw it in a diff gear, speed up or slow down if I am avoiding it.

Regarding the rasp, I think I overreacted. Now that I've been driving it more, I only hear it when the exhaust and engine is cold. Once at operating temperatures i don't hear it anymore. The big thing I'm fighting now is this vibration coming from behind my firewall. It's much more prevalent when everything is warm. It resonates and buzzes under 3000 rpm. It will do it when I come off the clutch and rpm dips and when I cruise at about 2200-2400 rpm. I have an audio clip but I don't know how to upload it.

The last video I took, I didn't know it sounded like that outside the car. It sounded surprisingly exotic. I don't think I heard any setup on these forums sound quite like it. In retrospect, I'm happy with it and think I'm pretty lucky considering the exhaust, Y pipe, and the headers are three completely different manufacturers. It could have sounded like a$$.

I'll be doing a dyno the night I drop it off because the weather warmed up a bit and I'm running 93 instead of 91 this time around. I'm not sure if it's a good idea to throw it on the dyno without a tune with all the parts installed. Definitely after the tune, I'll post those results

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