[RMNB]

Originally Posted by stellutz462

Sorry for bringing this back from the dead, but what was the outcome in your case? I had the pe mod done last week on my e92 and it’s droning bad

Outcome...sold exhaust and catless DP. Put on catted DP and Corsa exhaust. Solved problem. NO DRONE whatsoever!

[datbimmer]

Time to dig up this thread again. Is anyone running downpipes, secondary cat delete, stock xpipe and muffler ? Mine became raspy as hell and I want to install these resonators to get rid of the rasp. Anyone got a sound clip ?

[mweisdorfer]

Originally Posted by datbimmer

Time to dig up this thread again. Is anyone running downpipes, secondary cat delete, stock xpipe and muffler ? Mine became raspy as hell and I want to install these resonators to get rid of the rasp. Anyone got a sound clip ?

I have done the resonator delete and secondary cat delete on my E90 sedan. I put an X pipe where the resonator was & put 1792 vibrant resonators where the secondary cats were. I also installed 335IS mufflers and clamped the vacuum tube so the driver's side muffler is always being used.

I still have the cats.

The first vid is a cold start & the second one is a warm start.

[datbimmer]

Originally Posted by mweisdorfer

I have done the resonator delete and secondary cat delete on my E90 sedan. I put an X pipe where the resonator was & put 1792 vibrant resonators where the secondary cats were. I also installed 335IS mufflers and clamped the vacuum tube so the driver's side muffler is always being used.

I still have the cats.

The first vid is a cold start & the second one is a warm start.

Thanks. The E90 however has another muffler or resonator before the mufflers, is it still there ?

[mweisdorfer]

Originally Posted by datbimmer

Thanks. The E90 however has another muffler or resonator before the mufflers, is it still there ?

Yes, the e90 does have a resonator right before the mufflers. I cut mine off & installed a 2.5" SS X-pipe in its place.

[cn555ic]

Catless with x-pipe and these resonators and there is little to no drone.

The key factor is the x-pipe. The H-pipe will drone.

[Rob09msport]

So the stock e92 xpipe with vrsf dp and 1792 in place secondarys and stock 335i mufflers will not drone correct

[cn555ic]

It shouldn’t as I have almost the same setup except I have a catback also. The stock mufflers will muffle the sound even more as it has more Fiberglass packing material I suppose.

[Rob09msport]

I did it vrsf dp to 1792s to stock exhaust no drone no rasp I even tried burbles on moderate and can barely hear them but at wot sound intoxicating a thick exotic tone like a gallardo or older v12 Ferrari I am very pleased. I heard 335is with same setup and was rasp and tin and the bmw pe is nice with cats but without I felt sounds good but I dont know if I would want daily I also have my flap disabled which I was going to keep as a backup encase drone. I am entertaining the one side pe mod and using my flap so I have more wot sound and same or less light throttle but it is so perfect I dont think i will mess with it for fear of changing tone I would only do if was guarantee of increase in volume of exact same sound

[Rob09msport]

I'll post video shortly as soon as took car off lift started raining so I had 5 min of traction

[mweisdorfer]

Originally Posted by Rob09msport

So the stock e92 xpipe with vrsf dp and 1792 in place secondarys and stock 335i mufflers will not drone correct

The e92 has an H pipe. You need a SS 2.5" X-pipe.

Something like this

https://www.jegs.com/i/Magnaflow/642...iABEgKO7fD_BwE

[cn555ic]

Like I said guys. X-pipe is the key if you using these resonators.

[Rob09msport]

Originally Posted by mweisdorfer

The e92 has an H pipe. You need a SS 2.5" X-pipe.

Something like this

https://www.jegs.com/i/Magnaflow/642...iABEgKO7fD_BwE

I have the stock h or x whatever you want to call it and I just cut out my cats put 1792s in and no drone or rasp it is almost quieter at idle and light driving .I think one factor is everyone that does 1790s complain and everyone that does 1792s seems to like it I think the smaller resonator may have different tone to it also our stock exhaust is thick so people that cut full center section out and run new pipe prob raise pitch as well

[mweisdorfer]

Originally Posted by Rob09msport

I have the stock h or x whatever you want to call it and I just cut out my cats put 1792s in and no drone or rasp it is almost quieter at idle and light driving .I think one factor is everyone that does 1790s complain and everyone that does 1792s seems to like it I think the smaller resonator may have different tone to it also our stock exhaust is thick so people that cut full center section out and run new pipe prob raise pitch as well

I have the sedan. So, I did cut the stock resonator out and added a SS 2.5" X-pipe. The coupes do not have a resonator before the mufflers. I believe they have an H-pipe. I'm don't know for sure if the X pipe vs an H pipe changes tone or not.

https://www.bumberas.com/blog/2018/6...h-pipe-exhaust

According to this it can, but that's one article.

Regarding 1790 vs 1792? Fitment is the main deal there. It's a sh@t ton easier to just slide the 2.38" oem exhaust pipe into the resonator & weld it shut, than it is to cobble some sort of adapter pipe over both the resonator and oem exhaust pipe. The 1790 is 2.25" wide. So, the pipes don't match up.

I don't know if the actual resonators themselves are different in size? 1790 vs 1792? I can only say the pipes coming out of each of the resonators are different in size..

I don't have rasp or drone & I have an X-pipe.

[Rob09msport]

The resonator is same length but the baffle def smaller and from my mustang days an x pipe def gives that crackle like it deleted the vacuum cleaner from the sound if that makes sense. I had borla and flomaster both rumbled but when I did a bassani x pipe it gave a fuller sound

[Rob09msport]

That extra quarter inch should be an extra 9 sq inches of sound deadening

[mweisdorfer]

Originally Posted by Rob09msport

The resonator is same length but the baffle def smaller and from my mustang days an x pipe def gives that crackle like it deleted the vacuum cleaner from the sound if that makes sense. I had borla and flomaster both rumbled but when I did a bassani x pipe it gave a fuller sound

Gotcha. Seems you were able to compare both of them pound for pound. Good info.

So, not only is is easier to install the 1792, but it does give you better sound deadening too.

Cool beans !!!!

[cn555ic]

Originally Posted by mweisdorfer

I have the sedan. So, I did cut the stock resonator out and added a SS 2.5" X-pipe. The coupes do not have a resonator before the mufflers. I believe they have an H-pipe. I'm don't know for sure if the X pipe vs an H pipe changes tone or not.

https://www.bumberas.com/blog/2018/6...h-pipe-exhaust

According to this it can, but that's one article.

Regarding 1790 vs 1792? Fitment is the main deal there. It's a sh@t ton easier to just slide the 2.38" oem exhaust pipe into the resonator & weld it shut, than it is to cobble some sort of adapter pipe over both the resonator and oem exhaust pipe. The 1790 is 2.25" wide. So, the pipes don't match up.

I don't know if the actual resonators themselves are different in size? 1790 vs 1792? I can only say the pipes coming out of each of the resonators are different in size..

I don't have rasp or drone & I have an X-pipe.

1790 is for stock midpipes that are 2.25 in diameter and 1792 is for aftermarket midpipes which measure 2.50 in diameter

[mweisdorfer]

Originally Posted by cn555ic

1790 is for stock midpipes that are 2.25 in diameter and 1792 is for aftermarket midpipes which measure 2.50 in diameter

The diameter of the stock exhaust on a 335 is 2.38" or 60mm

[cn555ic]

Originally Posted by mweisdorfer

The diameter of the stock exhaust on a 335 is 2.38" or 60mm

Either way it uses 1790 resonators for stock midpipes.

[mweisdorfer]

Originally Posted by cn555ic

Either way it uses 1790 resonators for stock midpipes.

You can use 1790 or 1792, it doesn't matter which one you use. IMO you are much better off using the 1792's for the reasons of fitment.

[Rob09msport]

Originally Posted by mweisdorfer

You can use 1790 or 1792, it doesn't matter which one you use. IMO you are much better off using the 1792's for the reasons of fitment.

Agree unless clamping using 1790 is a pain and you will have slight drone