Resonated Midpipe??
 

Hey guys,

After reading many threads on single setups with exhausts noises being too loud, I have come to the conclusion to change my exhaust setup bc it is way too loud, and especially in Cali, this just dosen't fly. Currently running dp -> mp -> r-majic Ti, basically a complete straight through.

I am going to purchase a used blitz nur-spec catback, will have the WG plumbed, and run a resonated midpipe, hopefully this will significantly lower my db's. Only problem now is I don't want to waste more money getting a resonated midpipe from rx7store. I already have their midpipe and figure I could just buy a magnaflow muffler and have a shop weld it on to my existing MP, will this work?? Where can I get one for a good price and what size? Thanks for the help guys.

Did I ask a stupid question?? anyone?

I'm pretty sure this is the one you want, on center 3 inch inlet and outlet:

http://www.magnaflow.com/02product/s...ne=main&id=577

Found one for you, less than $90 shipped :)

http://cgi.ebay.com/ebaymotors/Magna...spagenameZWDVW

I'm in the same situation. I've heard good things about both Magnaflow and the Borla XR-1. Has anyone had experience with the two? Which is deeper quiter sounding?
I also have the Blitz Nurspec catback.

Definitely go with the magnaflow, it's straight through.

I've held one of the XR-1's in my hand, and it has a U-shaped baffle that runs the length of the tube. That can't be good for flow.

There's a different XR-1 which is the race version. Everyone on here gets the sportmsan. The race versin has three pipes with like a cone that split the air into them. It's alot more expensive.

The problem you may run into, which I allready had is the shape of the mid pipe or rather the bends. Mine is too far to the pasenger side to allow an oval shaped muffler to be welded in. I installed a metalit cat but that didn't do much for sound, although it cleaned up the smell. After that I installed a Moroso SS Spiral flow and that did help (maybe 10db) but allthough my ears don't (literaly) hurt anymore, it's still loud but not painfull. I was afraid I would be kicked off the track but 3 Hondas were way louder then me. The funny part is the sprial flow kinda makes it sound like a jet plane.

If you don't want a high flow metal cat and you want free flow then you could try welding in a DNA exhaust. If space is an issue, then try the collector version. I know my Spiral FLow has some restriction but I have no idea how much.
http://www.dnamufflers.com/DNA/full_throttle.html

oh btw: The Blitz is obnoxious with a mid pipe. Keep the R-Magic for shure.

i was thinking of the same thing... except running a DP - resonated MP - and a greddy SP2 or 3" cutsom magnaflow

what are you guys take on that... anyone run that setup before?

I have the same setup with the Blitz-NUR cat-back and Magnaflow resonated midpipe. Its pretty quiet at idle but it sounds great when you get on it:D I think its a good setup.

Thanks Goodfellas and everyone else who chimed in.

Hey GoRacer, I really do want to keep the Ti, but I don't know how much it will quiet down even if I did put another muffler on the midpipe.

Well the Blitz is a higher pitch noise and obnoxious without a cat. If the R-Magic is an oval shpe then it should have more packing then the round Nurspec. You could try the Borla Race XR1 or a DNA muffler but if your mid pipe is towards the side instead of the center then you could consider a Magnaflow offset same end muffler. There is also a strait section on the cat back pipe that you could insert a bullet type muffler.
http://www.magnaflow.com/02product/parts/offend.jpg

I have a borla XR1 (3.5") off of a 3.5" downpipe that does neck down to 3" at the flange to my Racing Beat dual tip exhaust. When my car is running again I can give feedback. I hope that is sometime VERY soon!

Midpipe I believe is in the center. In reference to the packing, there is none, haha it's as hollow as you can get on that R-Majic with just one slight bend. It's pretty much a canister like that of the apex gt exhaust. I heard the nur-spec with a rx7store resonated midpipe and I thought it sounded pretty throaty/beefy, although still noisy it was a kitten compared to the current setup I have. That flame shooting out the exhaust isn't really working out for me.

Update: Just notified by the shop where my car is currently being worked on right now that a guy with a FD is going LS7, he has a resonated MP, so my friend said i could have it. YES!!! I guess I'm going to try it out with the Ti and see how it sounds, worse comes to worse I'll just pick up the nur-spec and sell the Ti.

LS7?! wow... spending the quid. That engine is nice( even though it is a piston throwing thang) ;)

I know, I heard dude bought it brand new for $14k with titanium rods, etc. It sure does look bling bling.

Update: Just notified by the shop where my car is currently being worked on right now that a guy with a FD is going LS7, he has a resonated MP, so my friend said i could have it. YES!!! I guess I'm going to try it out with the Ti and see how it sounds, worse comes to worse I'll just pick up the nur-spec and sell the Ti.[/QUOTE]


LS7?...Nice!
If you do install the MP can you update this thread with the differences in exhaust note?
Thanks, D

I have one more question in regaurds to the midpipe.
After searching for many hours I've decided that I would like to go with a High Flow Cat to help with both noise and the "Gas Smell" especially. I'd be willing to sacrafice power on the street for this.
Instead of chopping up my straight thru midpipe I think I'd rather go with a complete midpipe with cat so I can have the option of swaping it out for track days. What do you guys think about the rx7store section?
http://www.rx7store.net/product_p/highflowfd3s.htm

Are there any other options out there for a good price?

Thanks for your help! Dan

That should work pretty well. If you've got the money and can stand to wait a little while, though the SMB Metallic Cats are supposed to be more effective than plain honeycomb-cats, and will flow even better.

http://www.smb.net.au/fullsystemsmazdarx7.htm

It's about halfway down the page.

Just FYI, the high flow cat will most likely be louder than the Magnaflow resonated mp.

I was hoping you would stop by and see me today while you where in Manhattan. I need to get a good look at your tail pipe. Tell Ihor I miss his beefy mits on my engine.

But what about the smell? Will the Resonated MP help with that? I'm assuming it's a stright thru design for noise only. Tell me if I'm wrong though.
I've decided to go with this for now:

Here's a pic on Ebay, but I'll be purchasing this from Summit here in Reno.
(The Metallic Cat)
http://cgi.ebay.com/ebaymotors/Magna...spagenameZWD1V

I will be cutting my MP afterall. (It's cheap anyways lol)

You assume correctly, it won't help a bit with the smell. But for some us, the smell is a kind of perfume :D

That's the one I have on the FC, it did wonders to the single 3 inch catback sound level! If I have to do it all over again, I would go with a magnaflow instead, less restriction(?), and waaaay cheaper!

YES sir!

I replace the borla MP with a magnaflow high flow cat for street use; DBs go way up, almost as high as when not running a MP at all.

That's the one I have, without the Borla MP (the cat replaces the borla MP); my single exhaust FC is LOUD X 2!

I agree. But in this case the perfume gets me high :aroused:
Plus, I have the challenge of getting a Smog certificate and need every bit of help I can get.

LS7?...Nice!
If you do install the MP can you update this thread with the differences in exhaust note?
Thanks, D[/QUOTE]


Update per your request: Got the nur spec last weekend and brought it to the shop where my FD is at. Friend installed it, came back the next day, fired it up (this is with MP and nur spec catback), I noticed a significant change in Db's right off the bat as opposed to the Ti i had before in there. But still it was noisy and not quite satisfied. I then told him to bolt up the resonated mp from the guy going ls7. I wasn't sure what kind of resonated mp he was using, but it definately did not look like a magnaflow, the muffler on it was circular.

Came back the next day after work and again he fired it up. I noticed just a tad of a change in db's now with the resonated midpipe on. Exhaust note on idle was more of a drone like Goracer mentioned and is rather annoying unllike the throaty Ti i had on before. Back to point, I decided this will do for now as there isn't much time left before tuning with Kan this saturday. I still haven't taken into account that it is still idling at 1500 not warmed up yet, and the echo of the shop causing it to seem louder than it really is. We'll see how it goes once fully warmed and outside of the shop. Worse comes to worst i will have to get the silencer to shut it up but it just looks :gayboy: and that will be my last resort.

The nur spec catback on twins w/ resonated mp i heard before i purchased it used was much quieter vs. nur spec catback with an a-spec single turbo and resonated midpipe....I anticipated this but the difference is still significant enough to be noticed if you were to be at a stop light lined up with a popo next to you. :fingersx: This definately is above 95db's which i think is the limit in CA.

I think will get some pics soon and list the R-Majic Ti and midpipe for sale soon.
I really don't want to part with it though considering its pretty rare :tear:

If you want a quiet(er) car, just do it the right way: resonated midpipe *with a magnaflow muffler* in the center, and you're done. Problem solved.

whatever they installed on your FD at the shop sounds like a typical Pettit style res mp with a glasspack in the middle, I'm not surprised the car is still loud.

Update per your request: Got the nur spec last weekend and brought it to the shop where my FD is at. Friend installed it, came back the next day, fired it up (this is with MP and nur spec catback), I noticed a significant change in Db's right off the bat as opposed to the Ti i had before in there. But still it was noisy and not quite satisfied. I then told him to bolt up the resonated mp from the guy going ls7. I wasn't sure what kind of resonated mp he was using, but it definately did not look like a magnaflow, the muffler on it was circular.

Came back the next day after work and again he fired it up. I noticed just a tad of a change in db's now with the resonated midpipe on. Exhaust note on idle was more of a drone like Goracer mentioned and is rather annoying unllike the throaty Ti i had on before. Back to point, I decided this will do for now as there isn't much time left before tuning with Kan this saturday. I still haven't taken into account that it is still idling at 1500 not warmed up yet, and the echo of the shop causing it to seem louder than it really is. We'll see how it goes once fully warmed and outside of the shop. Worse comes to worst i will have to get the silencer to shut it up but it just looks :gayboy: and that will be my last resort.

The nur spec catback on twins w/ resonated mp i heard before i purchased it used was much quieter vs. nur spec catback with an a-spec single turbo and resonated midpipe....I anticipated this but the difference is still significant enough to be noticed if you were to be at a stop light lined up with a popo next to you. :fingersx: This definately is above 95db's which i think is the limit in CA.

I think will get some pics soon and list the R-Majic Ti and midpipe for sale soon.
I really don't want to part with it though considering its pretty rare :tear:[/QUOTE]



Thanks for getting back/ I have a Magnaflow Metallicat in the mail and I'm going to purchase the Magnaflow muffler once I figure out where to mount it.

or why don't you add a 200 cell metal cat onto the resonated midpipe. You get quiet and no smell. Or weld 2 metal cats to your regular midpipe, and there you have it.

What do you guys think of this?
As I said above, I'm installing the Magnaflow Metallicat into my solid MP and want to also add a high flow muffler in there as well. Being that there's not much room to install both a Cat and muffler, I was wondering what I should expect if adding this on the front half of the MidPipe and the cat on the back portion.

Check this thread on the Delta series muffler from Flowmaster:
http://store.summitracing.com/partde...5&autoview=sku

Hopefully my car won't sound like Mustang lol.

I believe Max Cooper installed a cat and a muffler in the midpipe. The thread may be in the 3rd gen section.

https://www.rx7club.com/showthread.p...light=metallic

see page 6

Thanks books!

sry to revive the dead,

Will a resonated MP, such as Pettit or Rx7store still allow flames to shoot out?? And if im switching from a HF cat to a MP (with restrictor plates for creep), would i need to retune the car, or would it work to just control the boost to the tuned level?
THnx

Yes, you can still shoot fire.

Yes, you'll need a retune.

Get the magnaflow piece from rx7store, not the overpriced glasspack version sold by pettit.

I just installed the round style magnaflow with a JIC Ti and it took the raspy sound out. Very happy with the results. I would guess the oval (that is larger also) would quite it done more but was not sure if it would fit..

Ive read that the Rx7store one muffls is alittle too much, almost the same as a highflow cat. Im gonna buy a used one, so which i find ill take, but is their a big difference between the pettit and rx7store as far as noise resonation?

What is gonna get thrown off when the mp is put on, timing? or boost? (why do i need a retune)
not that i dont believe you, just curious.

Yes.
Less backpressure, more exhaust flow, potentially more boost despite the restrictor plate. You'll need to get richened up a bit.

I think you read wrong. I ran a Bonez high flow cat (new) back to back with an RX7 store resonated mid pipe using the Magnaflow muffler. The resonated mid pipe was just slightly quieter, had better sound quality and allowed the turbos to spool much more quickly and now allowed boost to creep.

Overall, its OK for the price.

Final question...
IS the resonated midpipe from Rx7store or Pettit really quiter than my rx7store high flow?? I want my car to be louder, but not stupid loud which logically made me want a resonated mp. the pettit prob is louder than the rx7store mp, so im prob gonna get that now. but damn, im pissed its quiter....

Here is my solution and it worked very well. 90db @ 15ft away (legal max is 95db), 94db @ 10ft away on the C scale and something like 80db & 75db on the A scale but since it's so deep of a note if measured they would use the C scale.

https://www.rx7club.com/forum/showth...custom+exhaust

someone answer my question......

What catback are you running? The magnaflow res mp is plently loud with a dp and the right cb.

Don't get the pettit glasspack, you may as well stick with a regular mp. Not only are they expensive, the glasspack blows out and then they really sound like shit. Ihor had one on his old single turboed silver FD, it blew out on him after a limited amount of use :icon_tdow

Quietest to loudest

Stock cat smog
Borla midpipe
HF cat smog
Resonated midpipe
high quality midpipe
ebay midpipe

i have a Greddy Sp1 catback. So the answer is that the rx7store res mp is quiter than my hf....wat other resonated mp are their that dont muffle the noise too much, other than pettit. Ill take goodfellas advice and stay away from pettit.

does anyone have a sound clip or can make a sound clip of their Blitz Nur Spec and RX7store RMP. I already have a Nur Spec, straigh mp, and 3' dp and was wanting to see how much of a difference their is between the straight mp and the rmp.

I'm happy with my Borla xr1 and RB dual tip combo.