Originally Posted by Gregski (Post 7628618)

so now that we took care of the big exhaust leak I can actually hear the new Flowmaster 40 Series exhaust, and I'll be honest with you, it needs some work

first it has a drone sound, around 1500 RPM it sounds like you are driving in a 4 door car and your kids rolled the windows down in the back, whoa whoa whoa... annoying to say the least

so it pays to have car buddies, I convinced my Mopar buddy Seth to loan me his brand new DynoMax mufflers for a test run (on the account of his Dodge truck being sidelined do to an enjin rebuild)

Notice how you can see right through the DynoMax mufflers, they have that straight through design, you can't see through the Flowmasters like that, some will argue that they flow better than the FlowMasters, I can't say either way. Also I've been told these are not directional, you can mount them offset in front or offset in the rear, there is no Input and specific Output.

so since these be 2.5" like mine they just bolted right up, and what's the verdict?

Well, they do sound different, these have a much more raspier sound, he calls it 60s muscle car sound, but more importantly they drone as well, so I am convinced that most if not all mufflers will drone unless you tune your exhaust system (more on that later)

Originally Posted by hatzie (Post 7628774)

Be careful
GM oil pressure gauge senders are 0Ω=0PSI and 90Ω=max PSI.
Autometer, like the 1.5" gauge on my ATV, uses senders where 235Ω=0PSI and 0Ω=max PSI. Not sure who makes the Summit gauges but it appears they may be Autometer units or clones.

The way to be sure is to test the Ohmage with the sender installed and the engine running or with the sender installed on a pressure source.
It's a pressure transducer that converts pressure into resistance... There's no rule that says you can't screw the sender into a female thread Milton air hose disconnect fitting and attach it to your compressor hose, with the air hose regulator dialed down to between 30 & 60PSI or so, and observe what the ohmage does.

Originally Posted by enaberif (Post 7628826)

Told ya that exhaust would drone like mad lol. Welcome to a cab of nothing but sheer metal and no insulation.

Originally Posted by Gregski (Post 7629173)

interesting, yes I will try to rig up some sort of bench test

Originally Posted by hatzie (Post 7629205)

Depends on how low your regulator will go. My old compressor has a decent regulator that will dial down to 10PSI. Great for painting.
Run it down as low as you can and slowly dial it up to the max on your oil gauge while you watch the resistance. If it changes fairly smoothly in the correct direction the sender is not the issue.

Originally Posted by hatzie (Post 7628774)

The way to be sure is to test the Ohmage with the sender installed and the engine running or with the sender installed on a pressure source.

It's a pressure transducer that converts pressure into resistance...

There's no rule that says you can't screw the sender into a female thread Milton air hose disconnect fitting and attach it to your compressor hose, with the air hose regulator dialed down to between 30 & 60PSI or so, and observe what the
ohmage does.

Originally Posted by Rich84 (Post 7631986)

Thats good news..

Originally Posted by Gregski (Post 7634092)