It's the cam sound that I like

 

That popping is backfire/misfire. It's loading up on fuel and running poorly. It may sound good but its not for your engine. You're basically wasting gas. (Referring to the Neon video)

 

As for "loping" sound of a cam, that's usually because of larger duration. Larger duration isn't generally needed unless you have a larger bore/displacement than stock. The larger duration allows more air n fuel to enter the chamber to compensate for the larger cylinder/displacement. Some will tell you that its lift you need for that but that's somewhat wrong. Lift is how far the valve "unseats" or opens from the Cyl head. Duration is the length of time that the valve stays open. So in short yeah, you could open the valve more but the valve is still the same size so its only gonna allow x amount of air to pass. Now if you hold the valve open a little longer, it will allow more mixture to enter or exit the chamber. It's a direct relationship between the two for the engine to operate efficiently.

 

This will help you "see" the two.

 

That's correct but you can also get the pops with a bad exhaust leak. Ask me how I know.

 

This too.

 

I've had a 2-chamber Flowmaster on my Dodge Ramcharger for over 20 years (That's right-20 years) and it still works like a champ. Good tone and no rust (of course, I live in Arizona, lol). When the stock muffler on my '93 XJ dies, I'm going to replace it with a Flowmaster.)

 

This is an inline engine. You'll never get the sound you are hoping for...exhaust pulses are all wrong.

 

I personally like having my straight cat, it sounds like a mix between a diesel and a V8 at idle, then when you rev it up it keeps a pretty deep sound, then has a sick gargle when it comes back down, I love it!

 

with mine, i have a lope at warmed up idle.

my exhaust is a walker down pipe with OUT the pre cat. then 2.5 in/out highflow cat into a 2.5 c/b with a spr 44. it is as described above. it sounds like a diesel and a v-8 at idle. its awesome.

I love the sound. Just because a car that has been cammed has a lope doesn't mean its over cammed, not even close. wow...lol.

there is a fine line between being cammed and over camed. lift,duration and lobe seperation is everything.

 

True.

 

so how many cats do i have in my 98 XJ? 2? i try finding it but can't. anyone got any picture?

 

Tommorow ill upload a,video my jeep has that tone u want that loud clappy 4.0 idle all I have is a resonator/empty glass pack with o2 drilled,in.

 

No plah plah to my exhaust but this is how mine sounds... I like it.


Sounds like this under a load..

 

I have an Iron Rock cat back system on mine. Sounds great. Its been on the Jeep for almost two years. It does drone a little but thats at low rpm. Iron Rock has a sound bite on their website, my Jeep sounds a little deeper than it does online, but that could be my laptops crappy speakers.