Coley Member 110 Member For: 17y 3d Gender: Male Location: Ipswich Posted 23/09/08 11:31 AM Share Posted 23/09/08 11:31 AM I'm looking at getting a 4" dump pipe with a 3.5' cat and 3.5' piping to a muffler (which I havent decided which to go with yet). I only want to run no more than 13psi with the tune and I was wondering whether the 4" dump and exhaust would effect the turbo's ability to hold boost? Or does this only happen when the boost is higher? Link to comment https://www.fordxr6turbo.com/forum/topic/50049-advice-about-exhaust/ Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 18y 2m 28d Gender: Male Location: SW Sydney Posted 23/09/08 11:38 AM Share Posted 23/09/08 11:38 AM The larger dump will make it harder for the standard actuator to hold steady boost. A good idea would be to get an 8 or 10 psi wastegate actuator that will hold your desired boost level with ease. Why do you only want to run 13psi specifically? What do you run now? Link to comment https://www.fordxr6turbo.com/forum/topic/50049-advice-about-exhaust/#findComment-739142 Share on other sites More sharing options...
Auscraft YBSLOW Member 281 Member For: 16y 8m 23d Gender: Male Location: Victoria Posted 23/09/08 11:43 AM Share Posted 23/09/08 11:43 AM Or go for 3.5 inch dump pipe, that way your turbo will not spin out of control. Link to comment https://www.fordxr6turbo.com/forum/topic/50049-advice-about-exhaust/#findComment-739144 Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 18y 2m 28d Gender: Male Location: SW Sydney Posted 23/09/08 11:49 AM Share Posted 23/09/08 11:49 AM ^^^ This is also a good point - if you only intend to go to 13psi, you will not need the massive flow potential of a 4" dump Link to comment https://www.fordxr6turbo.com/forum/topic/50049-advice-about-exhaust/#findComment-739150 Share on other sites More sharing options...
Coley Member 110 Member For: 17y 3d Gender: Male Location: Ipswich Posted 23/09/08 08:11 PM Author Share Posted 23/09/08 08:11 PM The larger dump will make it harder for the standard actuator to hold steady boost. A good idea would be to get an 8 or 10 psi wastegate actuator that will hold your desired boost level with ease. Why do you only want to run 13psi specifically? What do you run now?At the moment I'm only running the factory tune until I finish all my mods and have it tuned. I only want to run low boost (13psi) because its a fairly new car and its my everyday driver. If it was my old r32 I would run 17 no worries. I just dont want to push my car that far when it is only 2 years old. So if I go 4" dump with a 10psi wastegate actuator it should be fine? That way later on if I decide I want more power I can just get a new tune saves buying another dump. Only problem with the 10psi actuator would be I cant run a 8psi tune ( which I would run when I'm just driving the car to work). Can you get an actuator that can range from 8-15psi? Link to comment https://www.fordxr6turbo.com/forum/topic/50049-advice-about-exhaust/#findComment-739294 Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 18y 2m 28d Gender: Male Location: SW Sydney Posted 23/09/08 10:19 PM Share Posted 23/09/08 10:19 PM you can get an 8psi actuator I believe, that would probably be at its limit at around 15psi, but who knows. The stock actuator is rated at like 3psi, but it can hold up to 12 in some applications!Either way you will need a stronger actuator, so have a chat to your workshop and they will point you in the right direction - oh and keep us updated! Link to comment https://www.fordxr6turbo.com/forum/topic/50049-advice-about-exhaust/#findComment-739312 Share on other sites More sharing options...
Coley Member 110 Member For: 17y 3d Gender: Male Location: Ipswich Posted 24/09/08 06:49 AM Author Share Posted 24/09/08 06:49 AM you can get an 8psi actuator I believe, that would probably be at its limit at around 15psi, but who knows. The stock actuator is rated at like 3psi, but it can hold up to 12 in some applications!Either way you will need a stronger actuator, so have a chat to your workshop and they will point you in the right direction - oh and keep us updated!I think I might keep the standard dump and do a 3" system with the 3.5" high flow cat Link to comment https://www.fordxr6turbo.com/forum/topic/50049-advice-about-exhaust/#findComment-739469 Share on other sites More sharing options...
Worm A much better forum Silver Donating Members 3,808 Member For: 16y 9m 12d Gender: Male Location: Victoria Posted 28/09/08 03:22 AM Share Posted 28/09/08 03:22 AM 3 inch system has less flow then standard twin 2.25 exhausts... Just removed center muffler Link to comment https://www.fordxr6turbo.com/forum/topic/50049-advice-about-exhaust/#findComment-741457 Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now