GNU UP Member 124 Member For: 15y 5m 27d Gender: Male Location: sydney south Posted 07/09/09 02:06 PM Share Posted 07/09/09 02:06 PM hi guys,I have a ba xr6turbo auto with a twin 2.5 inch cat back x force exhaust,otherwise stock... looking at carrying out tune as I have a capa but unsure if I should change dump pipe and cat from standard?I intend on keeping cooler stock for now ,everyone has different ideas, appreciate to hear yrs.. Link to comment Share on other sites More sharing options...
freeze_dk I am dissatisfied with my current employment situation Donating Members 8,610 Member For: 18y 4m 24d Gender: Male Posted 07/09/09 02:36 PM Share Posted 07/09/09 02:36 PM Change the cat,, Appart from that you'll be fine with the standard dump for high 200's Link to comment Share on other sites More sharing options...
jaymen Member 57 Member For: 15y 8m 28d Gender: Male Posted 08/09/09 12:10 AM Share Posted 08/09/09 12:10 AM I'm getting 304rwkw's with Standard Exhaust & Cat, but I did remove the centre muffler & replaced it with straight through pipes...looking at getting the Nizpro 4" System soon. Link to comment Share on other sites More sharing options...
IH8TOADS Silver Donating Members 3,618 Member For: 19y 7m 14d Gender: Male Location: OZ Posted 08/09/09 05:05 AM Share Posted 08/09/09 05:05 AM Cat is your issue. The 3" section to the cat is fine for most people, I was running 360rwkw's with a BF dump, 5" bodied cat and then changed to an xforce 4" - 3.5" and didn't actually make anymore power! Get a big cat and have a Y section made to suit the xforce and it will flow & go well. Link to comment Share on other sites More sharing options...
XtRmn8 570Nm @1800rpm Donating Members 2,441 Member For: 21y 5m Gender: Male Location: Perth, WA Posted 08/09/09 05:12 AM Share Posted 08/09/09 05:12 AM I am going to run the same setup with a Herrod cat back. Should be good for low 300's. Link to comment Share on other sites More sharing options...
MercuryXr6Turbo Member 361 Member For: 16y 4m 23d Gender: Male Location: Perth, WA Posted 08/09/09 09:45 AM Share Posted 08/09/09 09:45 AM If just adding a cat to stock system (BF dump however) with injectors and tune... better to go 100cell or 200cell? 100cell too much flow for stock turbo etc? ie overboosting? Cheers Link to comment Share on other sites More sharing options...
Robos F6 Donating Members 407 Member For: 15y 11m 20d Gender: Male Location: Vic Posted 08/09/09 11:42 AM Share Posted 08/09/09 11:42 AM A 100 cell cat overboosting should be fixed when tuning. Link to comment Share on other sites More sharing options...
XtRmn8 570Nm @1800rpm Donating Members 2,441 Member For: 21y 5m Gender: Male Location: Perth, WA Posted 08/09/09 11:57 AM Share Posted 08/09/09 11:57 AM Got for a 5" bodies 100 cell cat mate. Link to comment Share on other sites More sharing options...
GNU UP Member 124 Member For: 15y 5m 27d Gender: Male Location: sydney south Posted 09/09/09 12:44 PM Author Share Posted 09/09/09 12:44 PM cheers guys, I have been told 200 cell on cat is what I should be chassing. I think ill leave the standard dump pipe... xforce would be the best to follow up on to match rear?I also got injectors but unsure if they are worth chucking in.. I been told you then need a bigger fuel pump etc, then I been told u dont.. appreciate yr ideas on this one guys Link to comment Share on other sites More sharing options...
XtRmn8 570Nm @1800rpm Donating Members 2,441 Member For: 21y 5m Gender: Male Location: Perth, WA Posted 09/09/09 01:43 PM Share Posted 09/09/09 01:43 PM What injectors do you have?Standard injectors are only good for about 250-260rwkw max. Standard fuel pump is good for high 200's. So if you put a set of 42lb injectors in you can go maybe about 280rwkw.High flow cat, xforce cat back, 42lb injectors, F6 or monza intercooler and you should get ~280-290rwkw with a custom tune. Link to comment Share on other sites More sharing options...
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