My car went heaps better after a high run and the muffer pack blew out the back,,I was shocked to see a roster tail of sparks out the back but evey thing seams fine.
Malcolm ----- Original Message ----- From: "Bob" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, April 26, 2004 4:34 PM Subject: Re: exhausts questions > I don't think I support that theory, if I recall correctly a simple > approximation to the ammount of a fluid (or gas) that can flow through a > pipe of a certain diameter is proportional to the crossection of the > pipe - ie the bigger the pipe, the more fluid you can flow. For a set > ammount of flow a liquid will certainly flow faster through a smaller > diameter pipe, however faster flow will lead in general to higher > friction - ie more backpressure. The design of the extractors is > certainly going to have a big effect like Brad said. Out of curiosity I > wonder if the weight makes much difference? Assuming the wall > thicknesses are the same a 3" exhaust is going to weigh twice that of a > 1.5" exhaust - may not be much in it though. > > On Tue, 2004-04-27 at 16:12, maldat wrote: > > I use 4-1 headers that are quite long, the 4-1 collector is just about > > under the seat. > > I also use a exhast thats one size down from 2"..everyone else had 2+" > > and my car was faster..?? > > > > Malcolm > > "new theory, you can move more air quicker thru a smaller pi[pe than a > > big one.... what do you guys think of that?. > > > > ----- Original Message ----- > > From: Jeff Oldham > > To: [EMAIL PROTECTED] > > Sent: Tuesday, April 27, 2004 1:51 PM > > Subject: RE: exhausts questions > > > > There is some debate about exhausts being too big & not > > providing enough back pressure. > > But i think its only the first part of your exhaust (the > > headers) that affect this. > > that why some new exhaust systems run variable exhaust > > manifolds as it affects your torque at various revs. > > > > go to about halfway down on this web page for some info. > > > > http://www.autospeed.com/cms/A_46/article.html > > > > > > I am running 4-2-1 motivator extractors into 2 1/2 with 3" > > tail pipe & turbo muffler. > > the 4-2-1 (or "y" extractors) give a slightly more spread > > torque range than 4-1 > > I think 2 1/2 inches is biggest that will fit in the rear > > cross member of a 510 > > without enlarging the hole :) > > > > When i got rid of the bit of curtain rod that was on my car i > > noticed not more power > > but that the engine felt like it could rev out further easier. > > > > BUT i could have it all wrong so ask some professionals :-) > > cheers Jeff > > > > > > > > > > > > > > > > > > > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] Behalf > > Of kla > > Sent: Sunday, April 25, 2004 12:47 AM > > To: [EMAIL PROTECTED] > > Subject: exhausts questions > > > > > > I've been wondering about sports exhausts, as i was > > thinking of getting a system installed (extractors to > > the back) > > and i was wandering. as a general rule. sizes. > > obviously too small means not enough flow, but what > > about big? > > what happens when you get too big, and what is > > generally the best size for a 1.5litre (standard, > > non-turbo etc.) > > if its too big do you get a dead space effect where it > > cant move enough of the air or what? > > cheers. > --membersozdat------------------------------------------------------- > > OZDAT Mailing List Please Note:- > > Send (un)subscribe requests to > > [EMAIL PROTECTED] > > Send submissions to [EMAIL PROTECTED] > > No unauthorised redistribution of this email > > http://www.ozdat.com/ozdatonline/index.htm > > http://www.ozdat.com/ozdatonline/listindex.html > > http://www.mail-archive.com/[EMAIL PROTECTED]/ > --------------------------------------------------------------------- > > > --membersozdat------------------------------------------------------- > > OZDAT Mailing List Please Note:- > > Send (un)subscribe requests to [EMAIL PROTECTED] > > Send submissions to [EMAIL PROTECTED] > > No unauthorised redistribution of this email > > http://www.ozdat.com/ozdatonline/index.htm > > http://www.ozdat.com/ozdatonline/listindex.html > > http://www.mail-archive.com/[EMAIL PROTECTED]/ > --------------------------------------------------------------------- > > > > --membersozdat------------------------------------------------------- > > OZDAT Mailing List Please Note:- > > Send (un)subscribe requests to [EMAIL PROTECTED] > > Send submissions to [EMAIL PROTECTED] > > No unauthorised redistribution of this email > > http://www.ozdat.com/ozdatonline/index.htm > > http://www.ozdat.com/ozdatonline/listindex.html > > http://www.mail-archive.com/[EMAIL PROTECTED]/ > > --------------------------------------------------------------------- > > > > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[EMAIL PROTECTED]/ ---------------------------------------------------------------------
