What did you do to your FX / QX70 today?

tchuck said:
At the exhaust shop having my defective muffler replaced. I just revved it a little without the muffler installed and its STILL RASPY! It must be coming from the cats, which is not the answer I wanted at all. Ugh.
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:eek.: You need to take your exhaust out for drinks and work this out man......
 
tchuck said:
At the exhaust shop having my defective muffler replaced. I just revved it a little without the muffler installed and its STILL RASPY! It must be coming from the cats, which is not the answer I wanted at all. Ugh.
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Kakumei Y-Pipe + HKS mid and rear section
Kakumei Y-Pipe, Mid section and rear section

These combinations above are my favorite setups for no rasp, drone, quiet at idle (but with a rumble) and screams at higher RPMs. Very high quality SS too.

My local mechanic said he's changed a lot of Nissan/Infiniti OEM exhausts, including FX35/FX45 due to rasp and rusting through. Sounds like a perfect excuse to go aftermarket (trusted brand).
 
AeroBFA said:
Yep, that is Espresso for 45 only and is sick looking in person. Just before I bought my 45, I was looking at Espresso and Brick. I ended up choosing Brick, because it was always my first choice. If the Espresso had a black headliner and matching dash panels in espresso like brick, then I would've flipped a coin to see which interior to get.
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Exactly Andrew, that's what got me to lot brick a bit more ...
 
AeroBFA said:
Yep, that is Espresso for 45 only and is sick looking in person. Just before I bought my 45, I was looking at Espresso and Brick. I ended up choosing Brick, because it was always my first choice. If the Espresso had a black headliner and matching dash panels in espresso like brick, then I would've flipped a coin to see which interior to get.
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i dunno, that is a tough call.. i do like both to be honest but i think i'd have to chose the expresso one after i saw it in my friends... i kinda makes me want to 2 tone my ugle wheat/willow to black/wheat.. if onlyyyy

aiya said:
The 45s come standard with sport, but the wood console set up does not have the etched look on the aluminum bits.
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ohh ok, now i got u!

---------- Post added at 03:49 PM ---------- Previous post was at 03:48 PM ----------
Logan said:
:eek.: You need to take your exhaust out for drinks and work this out man......
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that never goes out well, usually one gets more emotional than the other and starts throwing tantrums.. ohh i've been there
 
playing with cats almost always =rasp, even just swapping to high flow cats, forget test pipes, that's big time raspy/ricey... the stock cats are what really kills all the raspiness
 
turbocad6 said:
playing with cats almost always =rasp, even just swapping to high flow cats, forget test pipes, that's big time raspy/ricey... the stock cats are what really kills all the raspiness
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Is it the cell count or the construction? These (Kinetix) cats don't throw CEL's or smell bad but the rasp kills the whole system for me.
 
la_fx35 said:
...

Tim, I feel your frustrations. :argh: The right tone just take so much more when you go all out with a custom setup.
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It really does. I started down this path to avoid buying large sections without hearing them first. That part (cat-back) has worked out great but its sooooo time consuming to have to take it back to the shop for every little thing. Add in things like ugly welds, mystery rattles, and this godawful rasp and its enough to force me into submission.....almost.
 
Chedman13 said:
Kakumei Y-Pipe + HKS mid and rear section
Kakumei Y-Pipe, Mid section and rear section

These combinations above are my favorite setups for no rasp, drone, quiet at idle (but with a rumble) and screams at higher RPMs. Very high quality SS too.

My local mechanic said he's changed a lot of Nissan/Infiniti OEM exhausts, including FX35/FX45 due to rasp and rusting through. Sounds like a perfect excuse to go aftermarket (trusted brand).
Click to expand...

I didn't know kakumei made a mid and rear section... what are you running now?

If I have to make any more major changes I'm going to abandon the full custom route.
 
I can't say for sure but I would expect that a higher cell count should be better at filtering the rasp, I don't think it has much to do with outer case construction
 
Gave her a bath, cleaned the engine bay, revitalized all the plastic trim and lots of claybar love. Ran the buffer a few hours to a mirror shine till she was purring:tongue (2): No pics yet, it was dark by the time I finished.
 
Nice Joe! Getting it ready for the meet I see. :wink (2):
Slamming45 said:
Gave her a bath, cleaned the engine bay, revitalized all the plastic trim and lots of claybar love. Ran the buffer a few hours to a mirror shine till she was purring:tongue (2): No pics yet, it was dark by the time I finished.
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tchuck said:
It really does. I started down this path to avoid buying large sections without hearing them first. That part (cat-back) has worked out great but its sooooo time consuming to have to take it back to the shop for every little thing. Add in things like ugly welds, mystery rattles, and this godawful rasp and its enough to force me into submission.....almost.
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Keep up the struggle, must have faith!

---------- Post added at 06:14 PM ---------- Previous post was at 06:13 PM ----------
AeroBFA said:
Nice Joe! Getting it ready for the meet I see. :wink (2):
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Indeed :top:
 
turbocad6 said:
I can't say for sure but I would expect that a higher cell count should be better at filtering the rasp, I don't think it has much to do with outer case construction
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I was just wondering whether it was a matter of filtering or the internals rattling around (poor construction).

The OEM cats are going back on as soon as I get some time during the day. If that calms the bee hive then i'm done with the exhaust forever. I'm very much looking forward to moving on.
 
I don't think it's the internals vibrating because rasp is loudest with test pipes. it sounds like something rattling but it's not. factory cats have a high cell count and much longer cell blocks and a higher build thickness of the substrate coats which also restricts the cells that much more, high flow cats are using less cell count and shorter cell blocks and much less precious metal wash coat film thickness to increase flow but filter the rasp less... I'm not too sure if adding a resonator to the mix would help...
 
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