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Damn, yeah! I?ve managed it, to get that exhaust much quieter and still very nice sounding!
SETUP: Kamikaze ceramic header with the 2,5" downpipe. Thermal 3" exhaust with an Carsound cat 3" and a 650mm midpipe resonator (includ a dezibel restrictor. This is a short pipe, which restrict the diameter of the exhaust pipe a little, but I think the restrictor speeds the flow of the exhaust gases up?!?)
The exhaust is still loud and (mostly between 4krpm and 5.5krpm) and has a BIG rumble at Vtec crossover! Above 5.7krpm it is much quieter! Why?!?!
MY car is SOOOO nice sounding, I love it. I can feel the Vtec x-over much much more, like in the times when I was N/A. http://www.hostboard.com/ubb/smile.gif
Perhaps I?ve lost a few hp from the cat and resonator, but it was way too loud for street driving and I don?t want to drive with ear-protector or a helmet.
On Friday is dyno-time and I hope I can add 25-30whp with the exhaust setup, tuning my cam-gears and fine-tune the a/f mixture with my new cartech FMU and the Apexi VAFC. I?ll let you know of corse!
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98? ITR
supecharged @ 6psi
BTC unit, apexi V-AFC,
K&N ram air filter, skunk2 cam gears, ingalls camber kit
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For those thinking about doing this, get thermal to weld the 'quiet mod' into yours before you install it. When I talked to thermal, they said that a resinator WOULD take power out of the car, but that their modification does not as much.
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http://www.groupbuycenter.com/
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Since I don't have the kami yet, I'm interested to see if Austrian type R can succeed in getting fair hp benifits out of it while quieting it down quite a bit
good luck
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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by lundgren:
When I talked to thermal, they said that a resinator WOULD take power out of the car, but that their modification does not as much.
<HR></BLOCKQUOTE>
Of course Thermal say so. They want to make the business! MY mid-pipe resonator is a full 3" one, and I think there is not much lost in power. Hell, my JETEX resonator is made for rally cars and I don?t think it?s eating lots of power!
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Thermal didn't charge me for installing their quiet cone and the option is available on all new systems for free.
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Do you mean with a "quiete cone" a little pipe like I meant in the 1st post?
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Thermal didn't charge me either. They said a resonator took power out of the car, because it does, of course it makes it much quieter too.
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How much power does a straight through, unlouvered, rockwool packed resonator take away? I'd be surprised if it were measureable.
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told ya so! http://www.hostboard.com/ubb/tongue.gif
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-JG-
-1994 Civic EX-
-Rebuild in process, turbo in the mail-
-vapor-trail.net-
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What kind of resonator? Saying a resonator costs 1 to 2 HP is not meaningful unless you mention what kind. A well designed straight through that works by sound absorbtion flows within a couple of percent (if that much) as well as a straight pipe. Does that cost measurable power?
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The reference on how much power is lost is to a true in-line resantator, not a glasspack muffler. Outside of that I have no more information. I never claimed that bit of info was worth a whole lot....
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For what it is worth I have been told that the resanator costs 1-2 hp.
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Here is a azz-windows-paint graph of my resonator with the dezibel restrictor.
http://albums.photopoint.com/j/View?...762&p=48953341
