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IS F (2008-2014) Discussion topics related to the IS F model

Equal-length header sounds

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Old 06-23-16, 10:49 AM
  #31  
FFM
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Maybe a carbon surround insert to fill some of the open space around the tip might not be so bad. Just an idea. I definitely like Greddy's Ti muffler more but holy hell is it spendy.
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Old 06-23-16, 11:24 AM
  #32  
MileHIFcar
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Originally Posted by IredSF
Should ship this week and install next.
I'm guessing they'll dyno after install. Already have a baseline so should be simple to compare.
If you don't mind what is your baseline with stock manifolds I assume? What are your current mods for reference?

Thx
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Old 06-23-16, 11:36 AM
  #33  
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Originally Posted by MileHIFcar
If you don't mind what is your baseline with stock manifolds I assume? What are your current mods for reference?

Thx
My last dyno was all of 355whp 334 wTq (which is really low for mods, see my post about my dyno tests with novel ecu mod and what I think was happening and why)

I've got

Iss QES exhaust
Rr racing ti intake pipe
Toms super ram intake filter
Novel ecu tune

I'm pretty sure the car is putting out about 20 more hp and torque but lack of ventilation at m dyno shop I believe is causing it to pull power on the dyno.

I ran some 1/4 mile times at drag strip which indicated the car was making more power than suggested by the dyno, but never changed procedure at dyno so results all came back the same.

I would expect to see 400+ Whp and 390+wTq if the headers work as they are supposed to (assuming I can get the right airflow in the dyno to the car)
Last edited by IredSF; 06-23-16 at 11:43 AM.
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Old 06-23-16, 07:17 PM
  #34  
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Makes sense, keep us updated when you get those suckers on!
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Old 06-24-16, 12:06 AM
  #35  
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I also posted up another vid of it on the pavement.
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Old 06-24-16, 06:59 AM
  #36  
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sub'd for updates
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Old 06-24-16, 07:49 AM
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Originally Posted by FIGS
I also posted up another vid of it on the pavement.
FIGS PPE EL header and FIGS Proto exhaust first street run - YouTube
WOW that sounds amazing!!!!!
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Old 06-24-16, 11:57 AM
  #38  
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Old 06-25-16, 11:53 AM
  #39  
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I got wood Mike.
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Old 06-25-16, 12:27 PM
  #40  
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Sounds really nice.
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Old 06-25-16, 03:08 PM
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Sounds awesome
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Old 06-25-16, 08:32 PM
  #42  
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Ok f me running that sounds means as hell. I wasn't sold on the equal length until now for the sound only.

Plus I think that the equal length gains will show themselves with the supercharger.

What's your merge collector like, megaphone/reverse cone?
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Old 06-26-16, 10:28 AM
  #43  
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^^^^Like This:

Lou
Attached Thumbnails Equal-length header sounds-bares-headers.jpg   Equal-length header sounds-outlet-to-pipes.jpg  
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Old 06-26-16, 05:59 PM
  #44  
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Wonder if a version will be made for those goin short.

Their sound will vary.

Sure glad I went with the long tube headers.
Last edited by tas02; 06-26-16 at 10:37 PM.
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Old 06-26-16, 06:29 PM
  #45  
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Yes there is, they are the RCF shorties and modified to fit the smaller flange outlet for the ISF, can be yours for $2700
http://shopfigs.com/v3/index.php?rou...product_id=325
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