Subject	Re: empirical data -->
Posted by	RobWR14 on September 11, 2003 at 11:17 AM
	This message has been viewed 30 times.
In Reply To	empirical data --> posted by genic on September 11, 2003 at 11:00 AM
Message	well in theory it depends on the temperature difference between the exhaust gases in the downpipe and in the main pipe. If the temperature difference is great enough, then the air in the downpipes would have a greater volume, possible requiring a larger pipe than the cooler air in the main pipe. Of course, this is all "no shit" type of stuff, but you didn't take it into account in your 'empirical data'. I'd guess the temperature difference is probably negligible, so the pipes would then be better off the same size. It would be interesting to see the actual data for all of this.
Follow Ups	2.5 or 3.0 test pipes - robriw3 08:08:44 09/11/03 0.5in is the difference - JC_NS 08:28:04 09/11/03 Get the same size as the rest of your exhaust. (n/m) - Kenny 9 psi 08:29:33 09/11/03 2.5 supports huge amounts of power. (n/m) - BigTDogg 08:34:07 09/11/03 read this...greg dupree's take on this - genic 08:38:45 09/11/03 I agree with most everything except exhaust speed. - JC_NS 08:45:49 09/11/03 thats what greg said. 3 slows it down. 2.5 doesnt - genic 09:31:59 09/11/03 I don't agree with the 900 HP thing. - tonydanza 10:42:09 09/11/03 downpipes first "downpipes own, they own everything" - Scotts94z32 09:19:06 09/11/03 2.5 even if you went twin T88s. (n/m) - KàPPá¹ 09:29:57 09/11/03 Bad advice. - Chip(GinnMotorSports) 10:05:19 09/11/03 Sarcasm. Laugh a little. (n/m) - KàPPá¹ 10:10:04 09/11/03 2.5 x 2 > 3.5 x 1 ...*shrug* (n/m) - genic 10:11:37 09/11/03 Just barely though - U ZCREAM 10:16:46 09/11/03 "yea 2.5" is way more than enough for a Z32" - genic 10:23:21 09/11/03 yeah but to say that dual 2.5" is good for a 1799 hp Z - T0M 11:08:10 09/11/03 If he is using TWIN T88s, surely he would have 2 downpipes - Chip(GinnMotorSports) 11:03:48 09/11/03 dont fight with me...i have a mullet :) - genic 11:07:42 09/11/03 I shouls stop giving advice for "hypotheticals" - Chip(GinnMotorSports) 11:14:06 09/11/03 i want twin t88's on the bird (n/m) - genic 11:24:49 09/11/03 It helps if downpipes are larger than the rest o the exhaust (n/m) - tonydanza 10:43:26 09/11/03 Since the air there is a lot hotter. (n/m) - tonydanza 10:45:28 09/11/03 tell samantha hi and stick to your mid-80's day job (n/m) - genic 10:57:40 09/11/03 Do you have any empirical data to support this? - Kenny 9 psi 10:56:56 09/11/03 empirical data --> - genic 11:00:11 09/11/03 Re: empirical data --> - RobWR14 11:17:03 09/11/03 That doesn't make any sense. - tonydanza 11:18:13 09/11/03 You will create way too much turbulence - Only1Z 16:35:05 09/11/03 Re: You will create way too much turbulence - tonydanza 20:30:31 09/11/03 At the expense of back pressure... - Only1Z 22:15:29 09/11/03 Re: At the expense of back pressure... - tonydanza 10:06:23 09/12/03 use search ---this topic has come up a lot as - Slowninja(Delaware) 09:41:21 09/11/03 Stock turbo's 2.5 ( CFM dependant ) - ZBlacktt 11:57:08 09/11/03 I think you had an answer in mind when you asked this Q... - Boris 18:18:44 09/11/03
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