Impact of Exhaust Flow on Tune
Thread Starter
Launching!
Joined: Mar 2009
Posts: 203
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From: Chesterfield, VA
Impact of Exhaust Flow on Tune Running 3" Long Tubes into off road straight pipes then FloPro muffler, sometimes cutout before muffler (HiFlo Cats go on once a year for inspection). If I had it tuned with Cats is it worth re-tuning with the straight pipes if that's the way I normally run it or would that be a waste of time?
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10 Second Club
Joined: Jul 2008
Posts: 224
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From: Columbus Ohio
There seems to be some hidden info in here, but I just want to point out that when the exhaust is free'd up (better flow) this will allow the engine to get more air in it. Depending if the car is tuned with a MAF or not will determine how far off the tune will get. If it has a MAF it will compensate for almost all of the change. If it is tuned in speed density it will change a lot and possibly go bad lean depending on the severity of change.
Just thought I'd throw that out there, carry on.
Just thought I'd throw that out there, carry on.
Thread Starter
Launching!
Joined: Mar 2009
Posts: 203
Likes: 0
From: Chesterfield, VA
Thanks ND2RACE. Yeah there is some background here. Some dispute as to whether or not the previous owner misled me. Bottom line- I don't care about what may or may not have been done to the car in the past. I quite simply want someone who knows what they are doing to tune it, sign off on it and then I'll move on to enjoy the car until I have the bucks to do more.
BTW- I more than likely could just walk away from all discussions and continue driving it to death as I am now (there are no drivability issues immediately apparent), but I like knowing my baseline so I can progress from there.
BTW- I more than likely could just walk away from all discussions and continue driving it to death as I am now (there are no drivability issues immediately apparent), but I like knowing my baseline so I can progress from there.
Joined: Nov 2003
Posts: 6,216
Likes: 236
From: Wichita KS / Rancho San Diego
Apart from the background issues, taking off or installing hi-flow cats is not going to make a huge difference. Fuel trimming will compensate for whatever small change in airflow there may be.
Thread Starter
Launching!
Joined: Mar 2009
Posts: 203
Likes: 0
From: Chesterfield, VA
Haha I'm just messin with you. Yea it's up to you... I really don't know how messed up ur current tune is now. So you have stock inj and someone messed with the ifr???
Thread Starter
Launching!
Joined: Mar 2009
Posts: 203
Likes: 0
From: Chesterfield, VA
