Rydeit Member 327 Member For: 12y 4m 3d Gender: Male Location: Adelaide S.A Posted 28/02/14 06:47 AM Author Share Posted 28/02/14 06:47 AM Yeh your on the ball ralph when you put it that way. And johno bruce says without a doubt going to twin 2.5 or single 3.5" this car will open up and see massive power gains. He actually said the system on it is a downgrade from the stock system in his opinion. Ill go 4" dump and twin 2.5s with no cat monday. Should make a giant difference. Nothing else really explains why adding a cooler kit and turbo side 4inch intake wouldnt make any difference in power according to bruce. Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 1m 21d Gender: Male Location: Perth Posted 28/02/14 06:52 AM Share Posted 28/02/14 06:52 AM he's bang on on regards to his comments about the downgrade.also SMB4LYF 1 Link to comment Share on other sites More sharing options...
masda74 To Loud Gold Donating Members 4,112 Member For: 12y 11m 14d Gender: Male Location: WA, Perth Posted 28/02/14 07:32 AM Share Posted 28/02/14 07:32 AM Spoke to my tuna today about going the twin 2.5" and was advised that they drone alot.Is this true? Link to comment Share on other sites More sharing options...
Rydeit Member 327 Member For: 12y 4m 3d Gender: Male Location: Adelaide S.A Posted 28/02/14 07:50 AM Author Share Posted 28/02/14 07:50 AM I dont mind a bit of drone imo. Will keep u posted when new system goes on hoping for 350rwkw 15psi Link to comment Share on other sites More sharing options...
Z2TT Member 714 Member For: 12y 5m 18d Posted 01/03/14 02:23 PM Share Posted 01/03/14 02:23 PM From my experience in other cars twin smaller pipes compared to single bigger pipe have droned less but also what type of mufflers are in there and how many make a difference. Link to comment Share on other sites More sharing options...
johno Donating Members 773 Member For: 14y 1m 3d Gender: Male Location: Mt Gambier, SA Posted 01/03/14 10:25 PM Share Posted 01/03/14 10:25 PM I run a single 3 1/2" APS system, standard dump, aftermarket cat, and mine sounds great.As I have stated, ask Bruce. Link to comment Share on other sites More sharing options...
Henz Tampon inserted, Auto Acquired, next purchase a new handbag Donating Members 9,946 Member For: 16y 7m 25d Gender: Male Location: Vic Posted 01/03/14 10:34 PM Share Posted 01/03/14 10:34 PM This is most unusual for a South Australian Dyno. 2 Link to comment Share on other sites More sharing options...
Panda Eyes flame magnet Gold Donating Members 5,674 Member For: 16y 5m 28d Gender: Male Location: adelaide hills- 'race air' central Posted 01/03/14 10:36 PM Share Posted 01/03/14 10:36 PM twin 2.5 with big cats will go over 400. not too noisy/ droney either. I run 2 100 cpi cats side by side and make 365rwkw. stock ba bottom end holding me back... 1 Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 1m 21d Gender: Male Location: Perth Posted 02/03/14 06:15 AM Share Posted 02/03/14 06:15 AM My old Aps ute system was 3.5",flowed enough to support 370rwkw. Link to comment Share on other sites More sharing options...
FiftyOne Bronze Donating Members 1,145 Member For: 11y 4m 12d Gender: Male Posted 02/03/14 06:39 AM Share Posted 02/03/14 06:39 AM I've previously working designing vacuum trucks. Awesome adaption of technology in those things. Knowing what I know from those things, I would take 2 x 2.5inch pipes over a 3 or 3.5 single any day of the week. The 2.5 pipes will have a higher gas speed running through them, there will be less tendancy for pulsing in the pipes (creating drone) and will be quiter. Other option is for a 'J' pipe arrangement. I was skeptical but a very good exhaust fitter I know fitted one up as a request for a customer. He didn't think it would do sh*t but we all ended up very supprised. If I was going down the road of big streetable power, I'd seriously concider a J pipe Link to comment Share on other sites More sharing options...
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