macca2042 Donating Members 150 Member For: 15y 6m 12d Gender: Male Location: Yarrawonga Posted 14/04/11 12:27 AM Share Posted 14/04/11 12:27 AM Do I need a tune if I get a turbo back exhaust with hi flow cat? I have been told I will but I dont understand why Link to comment Share on other sites More sharing options...
RHR BOOST Moderating Team 5,698 Member For: 21y 5m 25d Gender: Male Location: Southern Highlands NSW Posted 14/04/11 12:37 AM Share Posted 14/04/11 12:37 AM lest restriction = less resistance for the turbo = more boost = limp mode. So in short yes Link to comment Share on other sites More sharing options...
Wenier Donating Members 1,736 Member For: 15y 1m 13d Gender: Male Location: Christchurch, New Zealand Posted 14/04/11 03:11 AM Share Posted 14/04/11 03:11 AM Yea as above, the standard cat creates a backpressure on the turbo. Once you remove the restriction you lower the backpressure which allows the turbo to overboost.So a tune is necessary. Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,331 Member For: 19y 5m 7d Gender: Male Location: Perth Posted 14/04/11 03:12 AM Share Posted 14/04/11 03:12 AM Okay we are done. This question has been asked and answered many many times. Link to comment Share on other sites More sharing options...
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