Kosij Donating Members 2,045 Member For: 13y 3m 5d Gender: Male Posted 06/03/13 06:19 AM Share Posted 06/03/13 06:19 AM Yeah well mine must have been special! It created 16psi back pressure! Once the 3.5" one was fitted all was good. 1 Link to comment Share on other sites More sharing options...
rednose RNS10S Donating Members 2,229 Member For: 18y 2m 30d Gender: Male Posted 06/03/13 06:41 AM Share Posted 06/03/13 06:41 AM Yeah well mine must have been special! It created 16psi back pressure! Once the 3.5" one was fitted all was good.Special or not, it supports a hell of a lot more than 320rwkw, mine has over 400 and others are at 450+ Link to comment Share on other sites More sharing options...
Paulie2256 Donating Members 7,441 Member For: 15y 11m 25d Gender: Male Location: SE Melbourne Posted 06/03/13 07:27 AM Share Posted 06/03/13 07:27 AM Rednose nose Maybe yours had a stuffed cat or sh*t mufflers 1 Link to comment Share on other sites More sharing options...
Panda Eyes flame magnet Gold Donating Members 5,674 Member For: 16y 5m 30d Gender: Male Location: adelaide hills- 'race air' central Posted 06/03/13 07:32 AM Share Posted 06/03/13 07:32 AM 4" is sweet... Link to comment Share on other sites More sharing options...
f6mark Member 2,908 Member For: 13y 9m 2d Gender: Male Posted 06/03/13 07:34 AM Share Posted 06/03/13 07:34 AM pinknose is always right kosij ok.. 1 Link to comment Share on other sites More sharing options...
BRK Member 361 Member For: 12y 11m 3d Gender: Male Location: Perth Posted 06/03/13 07:35 AM Share Posted 06/03/13 07:35 AM Either a single 90Mm or the twin 63 would be okay but they do produce a different exhaust note. In the early years of the Ford Turbo's the APS system was a single 90 then it ran into into twin 63 at out of the first muffler - and the system was noise compliant.As for 16 PSI back pressure - that is a lot in an aftermarket system IMO even with the power levels noted. I assume the testing was done at full power?A rough test on just the rear muffler off the twin 63 Manta shows very low readings (under 2 PSI) but at much lower power levels. I will say the test gear was none too charming but it did show that reading 1 Link to comment Share on other sites More sharing options...
Kosij Donating Members 2,045 Member For: 13y 3m 5d Gender: Male Posted 06/03/13 09:16 AM Share Posted 06/03/13 09:16 AM Yeah Wot on the dyno sensor bunged in before the cat! But the cat still is the same one as before. So that's was the problem! 1 Link to comment Share on other sites More sharing options...
f6mark Member 2,908 Member For: 13y 9m 2d Gender: Male Posted 06/03/13 09:52 AM Share Posted 06/03/13 09:52 AM just call Brownnose exhaust shop kosij. they know there stuff.. Lol Link to comment Share on other sites More sharing options...
Kosij Donating Members 2,045 Member For: 13y 3m 5d Gender: Male Posted 06/03/13 09:56 AM Share Posted 06/03/13 09:56 AM Hahahahhahah funny thing is my statement is facts that were gathered from a reputable tuner! 1 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 15d Gender: Male Location: South West QLD Posted 06/03/13 10:25 AM Share Posted 06/03/13 10:25 AM (edited) Kosij.. Your twin 2.5" probably was the one that came out with the restrictive rear muffler.. This was fixed in later products.. Edited 06/03/13 10:26 AM by Slightly Depressed Panda Link to comment Share on other sites More sharing options...
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