Does JLP sell a portedplenum ort just REM?? Or for that matter anyone else? Anybody running one that can give feedback?!

 

RUN AWAY!

https://www.f150online.com/forums/sh...=ported+plenum

Extrude honed is the way you want to go.

 

what's that supposed to mean??

 

nevermind...i didn't see the thread you attached! i just thought you said "run away"!

 

Not trying to rain on anyones parade but how can porting the upper plenum which smoothes out the airflow and should show a small cfm increase actually decrease hp???

 

Each casting is slightly different; so, unless you take your plenum off, and have it ported and smoothed then reinstalled, you take the chance of receiving a plenum that doesn't flow as well as the one you started out with. It's a crap shoot. Extrude honed removes more material and is less labor intensive. With a forced induction engine, this should equal better flow than ported, at a cheaper price. Even if the price were the same, it would be a better deal.

Porting by hand also leaves each piece susceptible to the patience of the man doing the porting. Or the amount of time he has to sink into each piece. This can make one part greatly inferior to another due to neglect, or the dreaded "That's good enough" disease.

The plenum I received didn't even change the shape of the dyno graph. Since the hp under the curve is where REM claimed the most improvement, this should atleast have happened. Yet, nothing at all.

 

PS- Paul and Tim did the right thing, and gave me a full refund for the part. That's good business and I am not suggesting that no one should buy anything from them. They stand behind what they do. I'm just saying that the ported plenum isn't that great of a product, based on the results I received.