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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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Thu, 14 August 2003 14:21
 
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| BlackSupra wrote on Thu, 14 August 2003 21:09 |
Stewart - lay it on me, what is your best suggestion for the system i should use?
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ummm, i'll give it a go 
what is your:
cam timing (and rpm range it's designed for)
exhaust port size or area (at manifold flange),
what rpm range you want max torque in,
what rpm you will be going up to,
cylinder size and number of cylinders,
what rpm will you be sitting at on the highway and around town? (ie 110-120 and 60-80)
do you have to have a cat? do you have much underfloor space for mufflers?
for my motor:
275/285, 65deg overlap (4000-7000)
24x27mm (6.5cm^2)
4000-7000
8000
330cc x 4
4500 on highway, 4000-4500 around town.
my extractors are 4-2-1, 37mm, 43mm, 50mm (OD's) lengths are 38cm, 38cm, 75cm, then into first resonator (4"x12"). this is designed for pulse tuning between 4500-6500, ie peak at 5500rpm.
Then about 1-1.5m of 50mm pipe to second resonator (taking that buzzy 4cyl noise out), then 50mm mandrel bent over diff housing to a 6x9x15" reverseflow muffler.
my torque peak is at 4600rpm (just above cruising speed) and tails off due to intake restriction. exhuast is much quieter than intake, and starts to resonate a lot at 5300rpm. resonance tails off about 7000rpm.
lemme know your details then i'll get back to you 
Cya, Stewart
[Updated on: Thu, 14 August 2003 14:24]
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| | Subject | Poster | Date |
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N/A exhaust diameter and decreasing diameters vs flow.
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BlackSupra | Thu, 14 August 2003 08:30 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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boudan | Thu, 14 August 2003 09:43 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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BlackSupra | Thu, 14 August 2003 10:03 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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oldcorollas | Thu, 14 August 2003 10:18 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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BlackSupra | Thu, 14 August 2003 10:22 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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oldcorollas | Thu, 14 August 2003 10:35 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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BlackSupra | Thu, 14 August 2003 11:09 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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oldcorollas | Thu, 14 August 2003 14:21 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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oldcorollas | Thu, 14 August 2003 14:22 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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BlackSupra | Fri, 15 August 2003 01:51 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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oldcorollas | Sun, 17 August 2003 14:21 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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BlackSupra | Mon, 18 August 2003 02:47 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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oldcorollas | Mon, 18 August 2003 03:38 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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boudan | Thu, 14 August 2003 10:06 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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draven | Thu, 14 August 2003 10:08 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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BlackSupra | Thu, 14 August 2003 10:14 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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draven | Thu, 14 August 2003 11:39 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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BlackSupra | Thu, 14 August 2003 11:50 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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draven | Thu, 14 August 2003 12:28 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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BlackSupra | Thu, 14 August 2003 12:30 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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7M-Brisbane | Fri, 15 August 2003 13:21 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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ed_ma61 | Mon, 18 August 2003 14:22 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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gmsta27 | Mon, 18 August 2003 18:27 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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oldcorollas | Tue, 19 August 2003 02:06 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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BlackSupra | Tue, 19 August 2003 08:34 |
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Re: N/A exhaust diameter and decreasing diameters vs flow.
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ed_ma61 | Tue, 19 August 2003 11:13 |
