Bought a demon few weeks ago with a pretty healthy 416. Car ran a best of 11.40 but seemed sluggish and slow to Rev to me compared to a very similar 408 I have with less cam in another car. Long story short had to change Trans and when pulled exhaust apart found these. Obviously removed them now car feels like it should rips to 6500 shift. Why would someone install these,
and any guess on et without?
Header insert killing power
- Thread starter MoparDave
- Start date
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diymirage
HP@idle > hondaHP@redline
Lake Header Inserts 3.5" Kit - Car Chemistry, Inc.
they are inserts that act as mufflers when running lake pipes or open headers
if the demon had full exhaust AND those my guess is the PO forget to take em out
they are inserts that act as mufflers when running lake pipes or open headers
if the demon had full exhaust AND those my guess is the PO forget to take em out
Northern Grit
Well-Known Member
10.9
I'm hoping. Car feels like a whole different animal.
Rat Bastid
Dunamis Metron
I use those mufflers. You have to increase the collector size to use them and have them work. If your header has a 3 inch collector you need a 3.5 inch collector with those mufflers.
You also need to test. I doubt your collectors are anywhere near long enough. You can add 20 inches of collector onto what you have and go quicker and faster than just open collectors.
You also need to test. I doubt your collectors are anywhere near long enough. You can add 20 inches of collector onto what you have and go quicker and faster than just open collectors.
Signed up years ago, but haven't been on in a long time account must have been deleted. Couple of my babies.
moparstud440
Well-Known Member
Kinda odd they had those and full exhaust, I'm guessing they were trying to really quiet the car down.
rustycowll69
Well-Known Member
Some dragstrips have sound limits. IIRC, Woodburn, OR had muffler/sound requirements.
My friend Charles has a 29 Model A with an old school 392 Hemi. He runs those type inserts with a turnout on them on the street. He ran it at the strip a while back and when he pulled the inserts out, the car went a solid .5 quicker. Yeah a HALF a second.
Like both your Demons, but the black one? WOW, just stunning!
One is a duster. Kim
Thank you sir. Quite fond of them myself
PRH
Well-Known Member
That doesn’t look like it would do anything good for engine output....... but it would make for a fun dyno test.
That Looks like Car Chemistry stuff
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