sc s15 New Member 16 Member For: 20y 26d Gender: Male Location: Brisbane Posted 15/07/10 08:44 AM Share Posted 15/07/10 08:44 AM twin 2.5 equals 5inch anyway so can't see why it would. But your suppose to have a little back pressure aren't you?Twin 2.5 actually equals 3.53. Also with turbo motors the less pressure after the turbo the better. Link to comment Share on other sites More sharing options...
xsicute Member 25 Member For: 15y 8m 28d Gender: Male Location: Perth,WA Posted 15/07/10 10:53 AM Author Share Posted 15/07/10 10:53 AM rhino all mods and tuning done at monsta torque in malaga. and as for back pressure..none is best as sc s15 said.Anchor sori mate yer its a 2008 BF MK2 ZF 6 speed. Link to comment Share on other sites More sharing options...
R-SPEC You are a dead set goose Silver Donating Members 3,968 Member For: 19y 1m 19d Gender: Male Location: Melbourne Posted 15/07/10 11:03 AM Share Posted 15/07/10 11:03 AM I had very similar mods on my old car. When you want some more power do the rest of the exhaust. I had almost the same exhaust setup (4" dump and 5" cat into stock exhaust) and the car picked up almost 30rwkw after installing a cat-back twin 2.5" Xforce exhaust. Godda let it breathe! Link to comment Share on other sites More sharing options...
xsicute Member 25 Member For: 15y 8m 28d Gender: Male Location: Perth,WA Posted 15/07/10 11:48 AM Author Share Posted 15/07/10 11:48 AM yer riteo cheers rspec. I like how its quiet now though with the standard that's why I didnt get the full job. I think I will be happy enough with the numbers its making now for a while. and all further funding will go towards rubber. haha Link to comment Share on other sites More sharing options...
MILES Donating Members 103 Member For: 16y 8m 10d Gender: Male Location: Townsville Posted 15/07/10 11:57 AM Share Posted 15/07/10 11:57 AM r spec, noticed you sig now says headsex tuned.. whats you fg f6 doin now?And also mate one of your vids of your old phoon on youtube made me go down the path of tuning. cost me a bit, but worth it bro. Thanks for the inspiration. Yours was the silver/grey F6? Link to comment Share on other sites More sharing options...
R-SPEC You are a dead set goose Silver Donating Members 3,968 Member For: 19y 1m 19d Gender: Male Location: Melbourne Posted 15/07/10 01:43 PM Share Posted 15/07/10 01:43 PM Yeah that's my old beast. Everyone loves those vids lol. It's almost back up and running now with a new owner and some fresh parts. He's hopefully getting it tuned next week. Can't wait to see it again.Heady got it up to 302rwkw and the injectors were having a whinge so going to make up some spacers and put the dekas in and go for 310rwkw. It would suit my new plates well until I get an exhaust Link to comment Share on other sites More sharing options...
FAST-XR EVIL T Member 259 Member For: 16y 1m 9d Gender: Male Location: Liverpool NSW Posted 16/07/10 01:10 AM Share Posted 16/07/10 01:10 AM I had very similar mods on my old car. When you want some more power do the rest of the exhaust. I had almost the same exhaust setup (4" dump and 5" cat into stock exhaust) and the car picked up almost 30rwkw after installing a cat-back twin 2.5" Xforce exhaust. Godda let it breathe!how much power where you making before the exhuast upgrade to gain you another 30rwkw? must have been pretty high power for that much of a restriction??? Link to comment Share on other sites More sharing options...
Dillz Three pedals are better then two.. Donating Members 15,637 Member For: 17y 7m 23d Gender: Male Location: Melbourne Posted 16/07/10 06:51 AM Share Posted 16/07/10 06:51 AM Twin 2.5 actually equals 3.53. Also with turbo motors the less pressure after the turbo the better.Can you explain that to me please? Link to comment Share on other sites More sharing options...
R-SPEC You are a dead set goose Silver Donating Members 3,968 Member For: 19y 1m 19d Gender: Male Location: Melbourne Posted 16/07/10 11:19 PM Share Posted 16/07/10 11:19 PM It was running just over 330rwkw then it went straight to just over 360rwkw with a wastegate port and flap with the exhaust Link to comment Share on other sites More sharing options...
mic Donating Members 1,725 Member For: 17y Gender: Male Posted 17/07/10 10:15 AM Share Posted 17/07/10 10:15 AM Can you explain that to me please?surface area and volume dude, couple of threads on this. 5 inch - 3.14 x 2.5 squared = 19.625. 2.5 inch - 3.14 x 1.25 squared = 4.9, then times that by 2 - 9.8. nowhere near the flow of a 5 inch. even if it was 5 inch is better because its not splitting up airflow. Link to comment Share on other sites More sharing options...
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