Eather40 New Member 19 Member For: 5y 1m 3d Posted 28/06/19 12:51 AM Share Posted 28/06/19 12:51 AM Hi guys I have an fg xr6 turbo making 430hp at the wheels I have a new turbo back exhaust for the car and I'm wondering if the car will need a new tune even though its been tuned before. Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 15y 10m 16d Gender: Male Location: Adelaide Posted 28/06/19 12:55 AM Share Posted 28/06/19 12:55 AM Most definitely will need one Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,277 Member For: 16y 6d Gender: Male Location: Melbourne Posted 28/06/19 12:57 AM Share Posted 28/06/19 12:57 AM Link to comment Share on other sites More sharing options...
Eather40 New Member 19 Member For: 5y 1m 3d Posted 28/06/19 01:28 AM Author Share Posted 28/06/19 01:28 AM What causes it to be tuned? Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,277 Member For: 16y 6d Gender: Male Location: Melbourne Posted 28/06/19 01:29 AM Share Posted 28/06/19 01:29 AM anything that compromises the PCM's ability to control the clean functionality of the stock tune and physical setup. Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 15y 10m 16d Gender: Male Location: Adelaide Posted 28/06/19 01:29 AM Share Posted 28/06/19 01:29 AM What’s different with a aftermarket exhaust vs a factory one ? Link to comment Share on other sites More sharing options...
Eather40 New Member 19 Member For: 5y 1m 3d Posted 28/06/19 01:38 AM Author Share Posted 28/06/19 01:38 AM The new exhaust is a 4 inch dump to a 3.5 inch exhaust where as the one I have now which is what it was tuned on is a stock exhaust with a highflow cat bolted to the stock dump pipe Link to comment Share on other sites More sharing options...
NA_TURBO Member 532 Member For: 8y 6m 8d Gender: Male Location: Mildura Posted 28/06/19 02:18 AM Share Posted 28/06/19 02:18 AM If you fit that exhaust, Rodney might come knocking...It'll overboost, lean out and probably go bang. 1 Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 15y 10m 16d Gender: Male Location: Adelaide Posted 28/06/19 02:42 AM Share Posted 28/06/19 02:42 AM 58 minutes ago, Eather40 said: The new exhaust is a 4 inch dump to a 3.5 inch exhaust where as the one I have now which is what it was tuned on is a stock exhaust with a highflow cat bolted to the stock dump pipe So we can agree it flows a large % more volume of air than the one it was tuned on previously ? A higher flowing exhaust creates a big change in the way the turbine wheel on the turbocharger spins thus creating a change in the way the turbocharger creates boost. This is a change in Load/reference points for what has been locked in place by your previous custom tune if you last tune is looking for “X,Y,Z” but now the turbo/engine is producing A,B,C we have a problem that can only be rectified buy modifying the old tune to see A,B,C ..... #easyas123 1 Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,277 Member For: 16y 6d Gender: Male Location: Melbourne Posted 28/06/19 02:43 AM Share Posted 28/06/19 02:43 AM alphabet tunes FTW! 1 Link to comment Share on other sites More sharing options...
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