Subject	Not true. Their HP "suggestions" are still based off of a
Posted by	Scotts94z32 on October 05, 2006 at 2:28 PM
	This message has been viewed 65 times.
In Reply To	It's neither... turtleboy has the idea posted by BigTDogg (MA) on October 05, 2006 at 02:22 PM
Message	cross-sectional area. So if they say 500RWHP is for a (single) exhaust pipe and should be 3-3.5" in diameter, then WE (Z32TT) would need 500RWHP per bank, or twice that amount to 1000RWHP. It is still very vague, but I've seen other articles mention 300RWHP per "motor", for 3" exhaust systems, or ~600RWHP. This is just the math - Greg has proven it on the track. I still think we (a few local cars) hit the nail on the head. Start off with a 3" downpipe to keep the exhaust gases moving. After the testpipe, cone down at calculated diameter over distance to 2.5" to increase the scavenge affect as the exhaust gases have cooled down from mass transfer to the stainless steel. To be fair, I have never had a 3" full-exhaust on my car, but I'm willing for have flaws in the logic pointed out. SS ____________________________________________________ 2-19... always remember 2-19...
Follow Ups	Exhaust piping diameter size info - interesting info - The Devils Z 13:53:50 10/05/06 More info .. I think this has been said before though - The Devils Z 14:01:30 10/05/06 You mean "take the RWHP # and DIVIDE by 2" ;-) (n/m) - Scotts94z32 14:12:43 10/05/06 Take the rwhp in the article and multiple by 2 ..or - The Devils Z 14:14:40 10/05/06 It's neither... turtleboy has the idea - BigTDogg (MA) 14:22:41 10/05/06 Not true. Their HP "suggestions" are still based off of a - Scotts94z32 14:28:26 10/05/06 I thought he was multiplying pipe dia by 2. I'm going home - BigTDogg (MA) 14:30:32 10/05/06 It's just two different ways of looking at the same thing - turtleboy 14:39:57 10/05/06 lol, you inadvertantly introduced quantum physics... - Kenny 16:20:01 10/05/06 Oopsie. Now Jim will chime in. ;-) (n/m) - Scotts94z32 16:27:40 10/05/06 [chime noise] :D (n/m) - CaliguyPurdue 17:57:11 10/05/06 2.5 dual = 3.53 single ; 3 dual = 4.24 single (n/m) - turtleboy 14:15:34 10/05/06 True (n/m) - Scotts94z32 14:17:56 10/05/06 how are you getting this math ??? isn't the formula - The Devils Z 14:20:27 10/05/06 Area = pi (d/2)^2 (n/m) - Scotts94z32 14:24:15 10/05/06 new maf (n/m) - RSR 14:44:23 10/05/06 Here's how you do it: - turtleboy 14:25:16 10/05/06 Or for a look at a single equation: - turtleboy 14:31:48 10/05/06 thanks ! (n/m) - The Devils Z 14:42:01 10/05/06 I should point out I used the diameter in this particular - turtleboy 22:15:36 10/05/06 That article is a load of crap. - Kenny 14:38:09 10/05/06 But you're wrong about one thing... - BigTDogg (MA) 14:40:56 10/05/06 Some ass is good ;). (n/m) - Kenny 14:42:47 10/05/06 Haha I noticed that two when changing my cats the other - turtleboy 14:43:41 10/05/06 I think that article is based on single exhaust systems - The Devils Z 15:11:19 10/05/06 I think it never specified, thus generalized all exhausts. - Kenny 15:32:00 10/05/06 Wasn't the link to an RSX forum? Hence single bank/exhaust. (n/m) - Scotts94z32 15:37:07 10/05/06 NSX forum "Exhaust Theory from Overboost.com" - Kenny 15:43:49 10/05/06 I think it's safe to assume they are talking about single - turtleboy 15:54:18 10/05/06 Re: I think it's safe to assume they are talking about singl - Kenny 15:59:23 10/05/06 I'll agree with you there. (n/m) - turtleboy 16:19:30 10/05/06 I never said it was a "2 for 1 swap".. don't put words - The Devils Z 17:12:34 10/05/06 "someone with your intelligence should be able to get it" - Kenny 17:23:47 10/05/06 no ..this was your point and your point is proven pointless - The Devils Z 18:15:16 10/05/06 Another reply? - Kenny 08:19:42 10/06/06 If you read the article, the author comments both about - Scotts94z32 16:01:32 10/05/06 I'll go with that. - Kenny 16:10:17 10/05/06 I believe straight DPs would benefit turbo cars over an - turtleboy 17:50:44 10/05/06 I would think the best idea would be to - pallen 15:06:05 10/05/06 Great idea! Now get on it! Changing dp/tp/exh is easy! - Scotts94z32 16:30:02 10/05/06 Does the same concepts apply to downpipe diameter ? - The Devils Z 15:16:46 10/05/06 Pretty much, - zboost(tx) 15:18:54 10/05/06 I wouldn't say "as soon as possible", but I'm sure Dee gets - Scotts94z32 16:26:31 10/05/06 Did you read the rest of my other post? >>> - Scotts94z32 15:38:13 10/05/06 just read it .. that was the setup that I have had for the - The Devils Z 17:19:51 10/05/06 I've always liked the idea of having diameter decrease >> - Arnel 16:36:13 10/05/06 It does seem logical when you think about thermal losses. (n/m) - BigTDogg (MA) 15:24:13 10/06/06 do you ever attempt to understand concepts before - Spee 21:40:43 10/05/06
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