apotocki

Hooray!!! For those that may be interested/read my posts from last fall, I have 'solved' my rear suspension banging noise. For those that haven't - here is a quick recap:
- installed Eibach springs
- after install, had a very loud banging coming from the rear anytime I would go over a moderate-severe bump
- after much discussion, I re-installed my OEM springs in the rear and the noise went away. (I suspected a possible shock issue but this kinda disproved it)
- When I took the car into the dealer for the recall, they 'suggested' that my problem may be due to the aftermarket (RX8Store) cat-back hitting 'somewhere.
- I removed the cat-back and 'customized it in a couple places that looked like they were close to the frame and such (using a hammer)
- the car went into storage for the winter and my plan was to re-install the Eibachs in the spring.

Well, spring is here and I also decided to change the shocks along with the springs. This week-end, I re-installed the Eibachs along with Koni yellows (1 turn up from full soft)...........my noise is gone!!!!! But.....the only thing that bothers me is I really don't know if it was the exhaust or a shock but I'm leaning towards the exhaust.(although the shocks 'look' fine). If it wasn't the exhaust, then I'm a bit sad that I bent up the pipe with a hammer (although I guess no one will know).
On another note - this car now handles amazing! the Eibachs provide a great look and the Koni's add to the road holding ability that this car is already great at. I'm very pleased!
To those that added comments/suggestions throughout my ordeal - a big Thank You! (especially Phil at DPE). Like I said - No more noise!!!!! Hooray!

Alan

IZoomZoomI

you used a hammer to bang your exhaust? Ouch...

NgoRX8

iTrader: (1)

was it a clanging noise? if it sounded like metal it might of been your exhaust.

but hey... at least its gone. haha

swoope

iTrader: (5)

wow,
a blast from the past. i wondered what became of this... i have a set of eibachs sitting in my trunk waiting to go on....

sounds like it was the cat.

beers

IZoomZoomI

yea i'm kinda having the same problem. Not bothering me a lot but i'm kinda confused where the noise is coming from.

swoope

iTrader: (5)

you have eibachs or a rx8 store cat?????

beers

IZoomZoomI

nah neither. OEM cat and zeal coilovers.

swoope

iTrader: (5)

how low did you make them??

beers

NgoRX8

iTrader: (1)

maybe its ur helix v-shaped exhaust...that thing is low.

apotocki

No...didn't really sound like a clanging metal noise....sounded like something was coming through the trunk. Hard to describe...it really sounded like a shock issue but..........
The noise didn't happen unless I was going over a 'sharp' type of bump and not with normal driving or going over dips in the road. It was very frustrating and annoying. And.....I could not see any place under the car that indicated the exhaust was hitting.....no marks on the underside of the car nor the exhaust pipe. It will be interesting to monitor this forum and see if anyone else has this problem and how they solve it.

IZoomZoomI

they're lowered about 1 1/2 inch all around. But it's not a banging noise more of a rattling noise. Sounds like a flange is vibrating on metal type of noise.

I think another owner that had the ms dual setup ran into to same noise too. I think its maybe due to the dual design.

Mazda-Rati

I was wondering what was the outcome to your banging noise too, apotocki. The thread just seemed to end on day without a fix. Glad to hear you figured it out. My Eibachs never did this with the RB exhaust. I would think it was the exhaust system hitting something.

mmats69

i have the magnaflow cat-back and i do get some rattling at idle from the exhaust. but i'm glad to hear you finally got the issue resolved alan. post some pics so we can see how it looks.