Reviving an OLD thread. Anyone still modding the 8.1s? I only tow, so is there any real gains to be made at low RPM? Extra grunt would be nice, fuel MPG increases would also be appreciated.
My new ride is an '03 2500HD Allison 3.73, with CA emissions. Four cats, four O2 sensors, but no AIR pump. Only mod is a Flowmaster 50 Series muffler. Dual 3" inlet, single 3.5' outlet. Currently does a nice job towing my 9,000 race car trailer (6" extra height). |
A friend of a friend got one from raylar and noticed the difference.
I modded one for a friend but it had to be sent out for welding since I don't have one. Still waiting for him to get it back and install it. |
Pcv
Originally Posted by Whipped383
(Post 5280865)
So here is how I redid the PCV system
Attachment 93500 Put a weld bung below the throttle body for vacuum Attachment 93501 And another at the back for a PCV valve Attachment 93502 I put a little screenon the PCV valve fitting for a baffle. Thoughts? Opinions? Criticism? |
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