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Pettit Resonated Midpipe review
this is just a FYI for anyone that would be interested in buying one. I installed my resonated midpipe today and off the bat i noticed more power and quicker spool. it is, as its been stated before, louder and creates more smell. i replaced my RX-7Store hi-flow cat with it, and there isnt a difference in sound at idle. At wide open throttle it is definitely louder, but not by much. i dont have a dB meter to test the sound level. I am a little worried about sound limits set at tracks for racing, but i still have the silencer (which gives the worse performance feeling when driving with it on.)
Product: Pettit Resonated Midpipe T304 Stainless Steel material, 3" pipe Build Quality: 8 (out of 10)The welds are pretty nice, but couldve been cleaned up a little bit. the piping is really nice, as it is stainless t304 piping. The brackets are welded on well, but again, could be cleaned up. My only complaint with the build is that the hanger is straight, where as most are bent at the end to ensure that it doesnt slide out. i doubt it will slide out, but it would have been an extra assurance. Noise Level: 8 (out of 10)If the stock cat was a 4, the high flow cat was a 6, the high flow with silencer was a 5, and the mid pipe is a 8 at wide open throttle. i havent driven it with the silencer on yet, but it should be noticably lower in volume. From idle it sounds exactly as it did when i had the high flow cat on. Smell: 9 (out of 10) (questionable)My car has always ran rich, and i will be able to tell how bad it actually is for raw fuel smell after i get it tuned. it definitely smells more then the high flow cat as you would expect. id consider the high flow to have been at a level 7. Overall Grade of Product: 8.5 (out of 10) Positives: Quicker turbo spool, more power, less restrictive exhaust flow Negatives:Smell, emissions (i felt pretty bad installing it today on Earth day), sound (i personally love the sound of my whole engine and exhaust combination, but i am sure some could get annoyed with it,) negative attention from cops (i have always put my car in neutral or upshifted to lower RPMs when i roll by cops, but i need to pay more attention to it), and Price (compared to a straight un-resonated midpipe, its a lot more money.) Price: $350 + gaskets and hardware. http://i181.photobucket.com/albums/x...tedmidpipe.jpg http://i181.photobucket.com/albums/x...eresonated.jpg i hope that helps anyone interested in purchasing a midpipe. i am definitely glad i went with the resonated instead of the straight midpipe. |
Nice write up. Very detailed and will help others when making a decision. I had one on my car and got rid of it because I couldn't take the noise. It would drone at highway speeds and leave my ears ringing. Replaced it with a Magnaflow midpipe and haven't looked back. Of course I'm an old guy so noise (or the control of) is important to me:)
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Historically I've been partial to the magnaflow res mp that rx7store sells, it's a larger rectangular muffler and it cuts down on sound levels substantially more than the pettit unit.
Other problem I've seen a few times with the pettit res mp......over time they can blow out, and you'll hear the packing rattling around inside. These were on used units with some mileage on them however. |
thanks guys. that should be helpful information for future use as well. had i found a post like this when searching before i made my purchase i might have went a separate way.
David- is it significantly lower with RX-7stores over Pettit's? if so, i might have to eventually switch to that (set up 4.) i dont mind the drone, but are they similar at wide open throttle? |
I really like mine also, nice low rumble. Not droning thoe.
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Originally Posted by ZumspdRX-7
(Post 9081437)
thanks guys. that should be helpful information for future use as well. had i found a post like this when searching before i made my purchase i might have went a separate way.
David- is it significantly lower with RX-7stores over Pettit's? if so, i might have to eventually switch to that (set up 4.) i dont mind the drone, but are they similar at wide open throttle? |
Originally Posted by ZumspdRX-7
(Post 9081004)
Price: $350 + gaskets and hardware.
I'm really not sure how the smell of gasoline from a street car is even marginally acceptable. Do you guys not have any friends? I'd be willing to bet that that the horsepower difference between a resonated midpipe and a decent metallic cat would be within the limits of resolution of a dyno. |
do you own an RX-7? if so, what are you complaining about or what do you not understand?
i replaced my high flow cat for the quicker spool and response that goes with the midpipe. as for the horsepower numbers, you could be right but it still doesnt matter for me. i'm not building a dyno queen. im building a car that i need fast out of corners. if you really think there isn't a difference between the two products, you are mistaken. i will assume you know how back pressure works and that a cat, even high flowing, is more restrictive then a straight pipe. obviously i thought it was worth it or else i wouldnt have replaced the practically brand new hi flow with it. and for the record my high flow didnt smell much better then my midpipe. please note, i am by no means bragging about the fact that my car isn't close to being 'green;' but i do know what my car is. as for the remark about friends: after they squeeze themselves into the bucket seat and strap into the 4 point harness, they know they aren't in a hybrid. thanks for your input. |
I had one for a long time and switched to the Rx7store. Alot quieter, no droning and no loss in performance.
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I currently have a strait piped car and i think it may be a little on the loud side, even for montana. I might have to get one of these bad boys. Ha as far as the smell who cares that much, its the smell of power, definetly not a hybred:lol:
If you are really that concerned about the environment then you should really not drive the 7 they blow tons of smoke |
Originally Posted by moconnor
(Post 9083270)
Not wanting to sound like a tree hugger, but for only slightly more you could have, say, an SMB metallic cat - and not have to worry about installing it on Earth day or the smell of gasoline.
I'm really not sure how the smell of gasoline from a street car is even marginally acceptable. Do you guys not have any friends? I'd be willing to bet that that the horsepower difference between a resonated midpipe and a decent metallic cat would be within the limits of resolution of a dyno. I've thought about this for my 3 rotor as I don't like to come out of the car smelling like fuel. Of course, to each his own. |
Since the topic is resonated mid-pipe and power related, maybe some could offer some input on this aspect of it:
I have single turbo FD, no emissions of any kind. The exhausts consists of an RB dual tip cat back, and the pipes to get the exhaust from the engine to the RB. This car is not driven on the street. At low RPM's the noise is acceptable (my neighbors appreciated the change from Apexi GT to RB Dual), but at WOT it is really loud. Autox isn't so bad, but driving next to a wall on straight it is too loud for me with a helmet on. Would adding a resonated mid-pipe (or something like it, suggestions welcome) add enough back pressure to require re-tuning? |
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