tune required?

[GaryG]

i was just wondering if a tune is required after doing lt headers, mid pipe an exhaust?

 

[MustangChris]

no.

 

[Jrgunn5150]

Nope, might help with the rear O2's though.

 

[NERD]

Yes, you'll need a tune. You wont have any sort of catastrophic failure because of it but the decrease in back pressure will screw up your Decay rate. As will switching your T/B. Also, as started above, you'll need your rear 02's turned off or you'll get a CEL. The rear 02's are only monitors and wont affect performance.

For a temporary fix you'll be able to do the IAC mod to adjust your decay.

 

[GaryG]

how hard is it to install lt's w/ an automatic tranny?

 

[GaryG]

Yes, you'll need a tune. You wont have any sort of catastrophic failure because of it but the decrease in back pressure will screw up your Decay rate. As will switching your T/B. Also, as started above, you'll need your rear 02's turned off or you'll get a CEL. The rear 02's are only monitors and wont affect performance.

For a temporary fix you'll be able to do the IAC mod to adjust your decay.

what is Decay rate? and will a SCT X3 tuner work turning off the rear 02's?

 

[NERD]

Haha, I wouldn't do it...lol

LT's are already a pain in the Arse with just a manual. I've seen some cheap headers so poorly designed you couldn't change a clutch without dropping the headers.

 

[GaryG]

well considering i've got an auto, mac headers r the only 1's i can find...if i find it to be to much of a pita, i'll have my work do it (i work for the ford dealership here)... ill need to see how many hrs it'll take an what it'll cost after my discount first

 

[MustangChris]

hm, my car has rear o2s and a full aftermarket exhasut... along with cats.... the previous owner had it all done...

can anyone explain this for me?

 

[vermilion]

if you have cats you're rear o2s read fine. however if they are clogged or busted id turn off the rear o2s

 

[GaryG]

if u dont have a programmer yet, can u go to AutoZone or any parts store to use their OBD-II and turn the rear o2's off?

 

[NERD]

No, that only checks and clears codes... After a full heat/coo cycle meets it testing parameters the light will be right back on.

 

[93PGT]

what is the "decay rate" ???

 

[NERD]

Basically it's how fast the rpms fall after you let your foot off the gas. (Idle Hang and idle)

 

[MustangChris]

Basically it's how fast the rpms fall after you let your foot off the gas. (Idle Hang and idle)

ohhhh

 

[GaryG]

if i have my car taken to work to install the longtube headers, do u think $432 is worth it? it'd be $720 before my discount

 

[93PGT]

do it yourself. just drop the k-member, buy stage 8 locking header bolts and rachet wrenches. I put mac LT's on mine back when it was automatic. I did it in my garage when i was 17 with help from my 12 year old brother

 

[Mario7820]

well considering i've got an auto, mac headers r the only 1's i can find...if i find it to be to much of a pita, i'll have my work do it (i work for the ford dealership here)... ill need to see how many hrs it'll take an what it'll cost after my discount first

I have an auto And I put BBK long tubes on its not that hard i unbolted my motor mount bolts lifted the engine a bit slid the long tubes in tightin them down and lowered the motor back in the car pretty easy but not at the same time by the way BBK long tubes sound GREAT!

 

[GaryG]

does BBK make lt headers for auto's now? last time i checked i didnt see any

 

[Brian95SVT]

I would a tune just because you could run into little issues here and there like I have. A tune would help with some headaches. I'm working on saving up for mine.