A large loss in backpressure will cause a loss in low end torque. You can
try a higher backpressure muffler or a hi-flo cat.
In a message dated 4/16/00 1:29:16 AM Eastern Daylight Time,
jrobert@voyageur.ca writes:
> Hey everyone
>
> My cat started to rattle so I decide to pull off my muffler and clean it
> out. Easy to do for me because my exhaust exists out the side in front of
> the right tire. After removing the muffler I was able to break up the
> "honey comb" material using a long pry bar. I would start the truck and
> with some quick cracks of the throttle blow the chunks across the shop
> floor. I kept repeating this until the cat was clean. I then replaced the
> muffler and started the truck and heard a rattling noise coming from under
> the hood so I shut it down. When I checked to see what was up I discovered
> that the waterpump shaft was bent! Checked all the pulleys, fan and belt
> and everything was fine. This pump was only about 3 months old. The only
> explanation I could come up with was that when I goosed the throttle the
> crank pulley pulled so hard on the pump that the shaft bent. I never
> redlined it, only went to about 3,000 RPM. I ended up claiming warranty on
> the pump and put a new one in. Anyone else ever have this happen!
>
> After cleaning out the cat my butt dyno tells my that my performance is
> down, is this possible? Thinking about installing a new converter but it's
> not necessary because we don't have emission testing.
>
> Dave R
> 92 Dakota 5.2L 3.55's LS, roll pan, Raider cap, 3 inch exhaust
> 71 Demon 340 3.55 suregrip 8 3/4,
> 92 Spirit ES
>
---------------------------------------------
Kelly in SC
'96 CC 5.2
'92 Daytona IROC R/T Finally!
'86 Daytona Turbo Z CS "Free 2 Good Home"
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