Yes the rest of the exhaust is stock. Im still very impressed on how it sounds, Saved a chunk of change and freed up a couple of horses.

 

I need to see if i can get the War department (Wife) to vidio a WOT drive by

 

I know what you talking about

 

WOW,.....you shoulda done some research first, i've considered this, but i found out how not having the backpressure can seriously mess up your engine.... I believe you might need to reset the ECU, b/c the lower pressure will cause too much air to enter the combustion chamber and it will run lean. Running lean too long will burn exhaust valves....

 

Cant believe that. sure seems i would have more back psi than a complete aftermarket exhaust system, Because I still have a muffler under the car thats about the same size of a fooseball table,stock Y pipe, and cats.

 

i want to bump this thread b/c i would lke to know if running a straight pipe instead of muffler will burn exhaust valves... i'm considerig this so i can custom my own dual-exhaust

 

If your worried about back pressure you can always install dynateck cones, Ive run these on our circle track race cars before and there good for a few pounds of back pressure and the cut down on the noise a little. Im not worried about the back pressure because like i said before the cars has a huge muffler below the driveline and its not to loud, If it didnt have enough back pressure it sure seems like it would be very loud

 

so your set-up is still running fine? no glitches, knocks or stuttering? would be glad to hear it so i can get to work

 

Yeah runs great! I commute 120 miles a day and not a single problem. I stll havent had time to vidio it, but will soon.

 

I just installed a 350 midpipe on my car and it sounds amazing. But today, I noticed that my engine oil pressure light turned on for a bit than turned off. i read the manual and said it could relate to my oil and I checked the oil its fine. I also noticed that there seems to be a clicking noise now coming out of my engine (seems like something might be hitting my timing belt).

Has anybody had this problem before? Kind of worried that it might be the midpipe.

 

Backpressure is not what keeps an exhaust going, it's velocity. I'm SO uber sick of hearing "oh I has no backpressure what does I do nows?!"

As long as you can keep the exhaust gases moving at a certain velocity (determined per motor), they will not get back fed into the motor. End of story.

Want proof? A KA24de motor (USDM 240sx) will benefit from a larger diameter exhaust system up until 4", with NO other modifications. You think there's really any back pressure out of a 2.4L breathing through a 4" pipe?!

 

Lucky you need to research the difference between reversion flow(why harleys sound like they do) and backpressure(opposition to flow) as they both apply to velocity in an enclosed premeasured environment. Two completely different animals. Using your logic a standard VQ would benefit from running open headers all day long and not suffer any consequences. Not true. As for your bigger is better mentality........Have you ever noticed that in the summer time when you open the window in your house all the way the breeze blows in a little...........but when you open it only a little it blows in about 10 times faster? There's your velocity increase through a hole 2/3rds smaller that even you can understand.....maybe? Every engine has an optimum intake and exhaust volume/runner size based on many factors. Once that size is determined it's inherent backpressure may need to be increased for optimum velocity to occur in the pipe based on valve timing, displacement yadda yadda yadda. There's an actual science to it and not just strapping on the bigest pipe laying around. What does the intake on your car look like..........a maf sensor duct taped to 3 feet of 6 inch PVC plumbing pipe? Hows that working for ya? Ya say it won't idle worth a crap but above 4000 RPM it's the bomb? you go dude............you go.

 

I never said bigger is better, did I? I said it will benefit UP TO a set point, which will be determined on a per motor basis. I gave the example of a KA because I did a ton of research before I bought an exhaust for my S14. Anything 4" and larger and you not only lose the horsepower you would've gained from an exhaust, you actually end up with less than you started with.

You sound like you're arguing merely for the sake of arguing, and all you're arguing is semantics. We said the same thing, you just used bigger words. Make you feel smarter?

 

Actually as you can see above you referenced backpressure as exhaust gasses being fed back in to the motor which is not at all what it is...........hence me mentioning reversion flow and you learning the difference. So we didn't say the same thing at all.

 

i heard if the backpressure drops, it increases the intake rate and runs the engine lean..... since there's a balance between how much gases are going into and coming out of the engine..... you can't put out more than you take in..