8.1L factory intake mods, homebrew style?
May 16, 2019 | 08:00 PM
#61
Teching In
Joined: Mar 2018
Posts: 20
Likes: 0
From: SW TN
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).
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).
May 18, 2019 | 12:18 AM
#62
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.
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.
Feb 28, 2021 | 05:15 PM
#63
Registered User
Joined: Feb 2021
Posts: 1
Likes: 0
Pcv
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?
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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