bossmang FREAKY Donating Members 12,423 Member For: 14y 10m 29d Gender: Male Location: Melbourne Posted 18/12/12 11:47 AM Share Posted 18/12/12 11:47 AM ill keep trolling these threads till I find the answer im looking for Link to comment Share on other sites More sharing options...
The Outsider Donating Members 1,205 Member For: 13y 6m 8d Gender: Male Location: Burwood, NSW Posted 18/12/12 12:54 PM Share Posted 18/12/12 12:54 PM http://smb.net.au/fullexhaustsystems-fordfgfalconturboxr6sedanute.htmjust saying 1 Link to comment Share on other sites More sharing options...
XYZ Donating Members 1,171 Member For: 15y 2m 6d Posted 18/12/12 10:34 PM Share Posted 18/12/12 10:34 PM Nizpro Just saying... 1 Link to comment Share on other sites More sharing options...
Impellor Member 835 Member For: 14y 4m 3d Gender: Not Telling Posted 18/12/12 10:36 PM Share Posted 18/12/12 10:36 PM Ralph, at what location does your system reduce back down to the 3 1/2 inches.Cheers Link to comment Share on other sites More sharing options...
Never had any say Panda I <3 Floods Silver Donating Members 11,198 Member For: 13y 3m 22d Gender: Male Location: South West QLD Posted 18/12/12 10:43 PM Share Posted 18/12/12 10:43 PM (edited) Reduction in diameter helps keep gas velocity up as the gas cools as it travels through the system. Tapers down to 3.5 just before the centre muffler.He said back earlier in the thread before it went to sh*t..Looks like some of the newer SMB systems taper on the dump though...I'm actually finding this quite interesting.. Normally I only deal with water in a pipe.. So it's not pulsing flows or anything like that.. Edited 18/12/12 10:44 PM by Sharp Dressed Panda Link to comment Share on other sites More sharing options...
Impellor Member 835 Member For: 14y 4m 3d Gender: Not Telling Posted 18/12/12 11:13 PM Share Posted 18/12/12 11:13 PM (edited) Just a couple of thoughts on this. Firstly I think that one could adopt the factory strategy. Which uses the centre muffler as the reducer. What would mean that you could run a 4 inch system into a 3.5 inch centre muffler and exit. Surely X-force could provide such an arrangement. But if not its just a matter of taking it into an exhaust shop. Secondly, the power figure that is able to cope with this configuration would be up to 420RWKW's I suggest. So if going over that then the equation would go from a 4 1/2 inch from dump/cat into a 4 inch. Working back on 300rwkw's, should look something like 3 1/2 inch into a 3 1/4 inch.Just throwing some idea's around, because there are so many benefits to a properly balanced exhaust. Such as Power and economy. I have added this as it may also be helpful. http://www.mk5cortinaestate.co.uk/calculator5.phpCheers Edited 18/12/12 11:14 PM by Impellor Link to comment Share on other sites More sharing options...
Impellor Member 835 Member For: 14y 4m 3d Gender: Not Telling Posted 18/12/12 11:19 PM Share Posted 18/12/12 11:19 PM That* Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 5m 27d Gender: Male Location: @ my laptop Posted 18/12/12 11:38 PM Share Posted 18/12/12 11:38 PM do not believe there is an exhaust out there that will improve economy on these cars over what the car has fitted standard while driving normally Link to comment Share on other sites More sharing options...
Impellor Member 835 Member For: 14y 4m 3d Gender: Not Telling Posted 18/12/12 11:43 PM Share Posted 18/12/12 11:43 PM Ratter, wouldn't improved scavenging improve economy. I didn't mean better than factory, just better than what you are already getting.Cheers Link to comment Share on other sites More sharing options...
GTEXXED Banned Banned 910 Member For: 12y 4m 3d Gender: Male Posted 18/12/12 11:44 PM Share Posted 18/12/12 11:44 PM do not believe there is an exhaust out there that will improve economy on these cars over what the car has fitted standard while driving normallyWhen I fitted my 3" catback from Xforce it improved economy,the car was in std tune also.Its still the exhaust I run now.I know why this happened but won't go into in this thread. Link to comment Share on other sites More sharing options...
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