347Rwkw-Yeeow

[sc s15]

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.

[xsicute]

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.

[R-SPEC]

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!

[xsicute]

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

[MILES]

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?

[R-SPEC]

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

[FAST-XR]

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???

[Dillz]

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?

[R-SPEC]

It was running just over 330rwkw then it went straight to just over 360rwkw with a wastegate port and flap with the exhaust

[mic]

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.