19-05-2012, 10:07 PM
It's always a trade off.
I bet a really good intercooler the size of the HDi110 one piped in really well, could make you 155bhp without issue.
The problems is you can't get the ideal intercooler and ideal piping, so it's about saving money on the hardest bits to get right that make the smallest difference.
I've seen loads of people spending money/time on adding bulges to their end of their boost pipes for the silicone pipes to stretch over, then pay £££ on Mikalor clips.
I just ran roughened up ally pipe ends (sandpaper wrapped around the last 1inch and rotated around a few times), and then used good quality jubilee clips. That is cheaper (clips), less time spent (not making lumps), and will reduce internal flow friction massively as each of those lumps will probably cause flow separation and thus pressure drop.
I ran 22psi, my brother ran 25psi, and we never had one pipe leak, pop off, or even look to not be in perfect condition after a year of use.
Maybe if you are running 30psi you might want to run a bigger pipe, then you can get more friction over the bigger pipe ends.
Just look what OEM's are doing too, they don't have money to burn (much like us), but they want the best system possible too... none of them have fancy bevels on their pipe ends, or mikalor clips etc. They just use jubilee or spring type clips, and use barbed ends on their pipes (no disruption to internal flow that way) etc etc...
Hmmmm
Dave
I bet a really good intercooler the size of the HDi110 one piped in really well, could make you 155bhp without issue.
The problems is you can't get the ideal intercooler and ideal piping, so it's about saving money on the hardest bits to get right that make the smallest difference.
I've seen loads of people spending money/time on adding bulges to their end of their boost pipes for the silicone pipes to stretch over, then pay £££ on Mikalor clips.
I just ran roughened up ally pipe ends (sandpaper wrapped around the last 1inch and rotated around a few times), and then used good quality jubilee clips. That is cheaper (clips), less time spent (not making lumps), and will reduce internal flow friction massively as each of those lumps will probably cause flow separation and thus pressure drop.
I ran 22psi, my brother ran 25psi, and we never had one pipe leak, pop off, or even look to not be in perfect condition after a year of use.
Maybe if you are running 30psi you might want to run a bigger pipe, then you can get more friction over the bigger pipe ends.
Just look what OEM's are doing too, they don't have money to burn (much like us), but they want the best system possible too... none of them have fancy bevels on their pipe ends, or mikalor clips etc. They just use jubilee or spring type clips, and use barbed ends on their pipes (no disruption to internal flow that way) etc etc...
Hmmmm
Dave