View Full Version : Under or over?
Scooter
06-23-2009, 08:07 PM
Are most people running their exhaust under or over the rear axle?
Knestis
06-23-2009, 09:12 PM
Just far enough back to meet the rules, then a 90* turn down.
K
ulfelder
06-23-2009, 09:14 PM
When I saw the title of this thread, I thought it was going to be about the Great Toilet Paper Controversy.
:D
Steve
Knestis
06-23-2009, 09:41 PM
That's "fold, roll, or wad."
K
erlrich
06-23-2009, 10:28 PM
(c) in front of.
oh, and all the top wipers fold...
JeffYoung
06-23-2009, 10:53 PM
Priss!
Wad it up, scoop it out.....
And side exhaust, tuned length using that Header design program.
Ron Earp
06-23-2009, 11:01 PM
I clicked on it because I thought it was some sort of inane question about shotguns.
Scooter
06-23-2009, 11:20 PM
Alright nerds, thanks for the help. :rolleyes:
Anyone with a 2nd Gen Rx-7 have any input?
lateapex911
06-24-2009, 01:05 AM
1st gen under.
(And oddly, that's the second time today I've been asked that question, and I can't remember the time before that...weird)
mbuskuhl
06-24-2009, 09:29 AM
Alright nerds, thanks for the help. :rolleyes:
Anyone with a 2nd Gen Rx-7 have any input?
Under. A 3" pipe won't fit going over the axle.
Where the pipe goes under the subframe will be the low point on the car, be prepared to replace it often :)
tom_sprecher
06-24-2009, 10:04 AM
1st gen 3" over, and yeah, it's tight.
jhooten
06-24-2009, 12:21 PM
Just far enough back to meet the rules, then a 90* turn down.
K
Same here. Little irritating in a dusty paddock space. I don't have to worry what side of the track sound is working
C. Ludwig
06-24-2009, 04:03 PM
Under. A 3" pipe won't fit going over the axle.
Where the pipe goes under the subframe will be the low point on the car, be prepared to replace it often :)
The 2nd gen answer.
Scooter
06-24-2009, 07:12 PM
Ok, thanks!
Here's a quick follow-up. PRACTICALLY speaking, is it worth it to re-tune the ECU when going from one kind of high-flow exhaust to another?
I'm not talking full-stock with cats and small pipe to full-race exhaust.
I know this is percentages, and I'll probably do it anyway, but it seems unlikely to me that the maps could change that much. Anyone have experience with this?
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