Turbo Back Exhausts? - Printable Version +- 306oc - Peugeot 306 Owners Club & Forum (https://www.306oc.co.uk/forum) +-- Forum: Engines (https://www.306oc.co.uk/forum/forumdisplay.php?fid=16) +--- Forum: DW10 HDi section (https://www.306oc.co.uk/forum/forumdisplay.php?fid=10) +--- Thread: Turbo Back Exhausts? (/showthread.php?tid=27634)

Turbo Back Exhausts? - JTaylor2005 - 06-11-2014 Hey all. When having a turbo back exhaust what would be a good size to go for? Also on turbo back exhausts will this part need fabricating? Thanks RE: Turbo Back Exhausts? - Piggy - 06-11-2014 If you are using a standard turbo, I would just go from that flex joint back. 2.25" is standard I believe, so 2.5" would be a good improvement. 3" would be a bit overkill unless you are hunting for big bhp with a bigger turbo RE: Turbo Back Exhausts? - JTaylor2005 - 06-11-2014 Fair enough mate, Cheers I suppose a nice mandrel bent 2.5" would probably flow a lot nicer anyway than a 2.25" crush bent muffled setup anyway haha. RE: Turbo Back Exhausts? - Eeyore - 06-11-2014 from my limited diesel knowledge you want to get everything out of the turbo as quick as possible. So ideally youd have no exhaust but in reality the bigger the better. 2.5" is the right size to go for in reality. What you want to go for is the decat, standard centre pipe and then remove the backbox and replace it with a straight pipe or a cut down centre pipe. The manifold elbow part you posted a picture off doesnt need changing. RE: Turbo Back Exhausts? - JTaylor2005 - 06-11-2014 Nice. I was thinking along the right lines then haha All good. Thanks guys RE: Turbo Back Exhausts? - Eeyore - 06-11-2014 No Worries. Hooroo! Turbo Back Exhausts? - Frosty - 06-11-2014 All about 3" though I can't take credit for the 1 on the estate. It sounds epic RE: Turbo Back Exhausts? - Poodle - 07-11-2014 Just a warning, if you go too big it can be counter-productive, quite aside from being pointless. Besides, the bigger you go the more expensive, heavier and more of a pita to fit it becomes. 2.5" has more than enough flow for stage 2.