Quote:
Originally Posted by 427BDR
Hi Roy
Looks like you have the older pipes I think, yes? Our pipes look very different on the inside. They are definitely less restrictive than yours but they waddle, rattle and sound down right like **** on deceleration IMO.
This may all have to do with the level of power the engine produces. Seems like backdraft is doing a lot of coyote installs and they claim few complaints. maybe smaller engines with ~400hp don't shake these pipes as much as larger displacement engines with 550-600hp.
Before you order the new pipes from backdraft let's make sure we pinpoint the source of the issues. Otherwise you may end up disappointed with the pipes.
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You should put your car on a chassis dyno and see. Those Smeding motors, just saying... Our smaller engine Coyote car just did 715rwhp
The sound you are not used to is the sound of a glasspack muffler. Yes, these are glasspacks... and they save upwards of 50hp (if you are actually making 600hp, it's all relative).