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Author Topic: Longtubes and tuning TwoTone91GT ¯ Member # 7254 posted                              Who in here actually got a tune after installing longtubes ? Is it needed ? All these questions for a fox For those who didn't get a tune how did it run? Posts: 469 | From: Elk Grove,Ca | Registered: Nov 2006  |  : 89bluenotch ¯ Member # 7454 posted                              don't waste your money -------------------- -Gunnar 89 coupe 54 f100 R.I.P. SILVERLX Posts: 1857 | From: HEALDSBURG | Registered: Feb 2007  |  : Jaejae5.0 ¯ Member # 7958 posted                              ive never heard of anyone gettin a tune after longtubes??..why would u need one? Posts: 4890 | From: the combustion chamber | Registered: Oct 2007  |  : TwoTone91GT ¯ Member # 7254 posted                              my friend had to for his car because it started to run rich Posts: 469 | From: Elk Grove,Ca | Registered: Nov 2006  |  : CobramanPhil ¯ Member # 2170 posted                              Well it depends really on a couple of things. Just the basic design of a longtube header compared to what you had on there before might necessitate a new tune in itself. Depends if your car was tuned to the ragged edge before with a smaller exhaust. You might go a bit leaner, but it won't matter if you did not have a tune in the first place as a reference start. Most people run into idling issues with longtubes since the 02 sensors are now placed further down the exhaust path and get reduced heat from the exhaust (eec thinks it is still in warmup so it pushes more fuel and you get that rich condition). To cure that you can change the delay time to OL to enable the 02s to get heated after startup or you can force OL to run all the time (depends on your application, of course). Now I am not saying it is absolutely necessary to get a tune after longtubes, but to run with no negative issues then a tune is required. Posts: 1016 | From: California, Bay Area | Registered: Dec 2002  |  : TwoTone91GT ¯ Member # 7254 posted                              cobraphil thanks you made it plain and simple Posts: 469 | From: Elk Grove,Ca | Registered: Nov 2006  |  :

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