2008 Long tube headers need tuned ??
- Thread starter 2snakes
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rcl4668
Enthusiast
You warranty can only be legally voided if the aftermarket part in question was a direct cause or a contributing factor toward a given mechanical failure.
I don't know the answer to the tuning question but I plan on installing some Belanger/Mopar headers on my 08 and my Viper Tech and Belanger stated that a tune is not required.
/Rich
I don't know the answer to the tuning question but I plan on installing some Belanger/Mopar headers on my 08 and my Viper Tech and Belanger stated that a tune is not required.
/Rich
mjorgensen Woodhouse
Enthusiast
As far as I know the computer will compensate for the headers. This was the case with Herb Helbigs car but we have not yet confirmed the production PCM will do the same. We will have a set on a 08' after a baseline dyno on Wed. if all goes well and will let you all know the results of our findings.
MTGTS
Enthusiast
I thought it was gonna take a while before people (tuners) could figure out the ecu?
Dyno Dave
Enthusiast
After working on these engines for the last couple of years I would venture to say that you should be able to pull some fuel out, maybe quite a bit, at top end with headers. I never got the chance to run any headers but I would expect them to want the exhaust cam timing to have an earlier closing event also.
During development I noticed that any increase in exhaust back pressure liked a later exhaust closing. The blowdown portion of the cycle probably needed more time to accomplish at higher back pressure numbers. The reverse would be true at lower back pressures.
Boxer12
Enthusiast
Dave, you are talking specifically about the -08?
rtigert
Enthusiast
One tuner has made it clear that the exhaust ports on the Gen IV are much larger than the Gen III; and thus requiring a minimal 1 7/8 diameter header tube. Not that the Gen III won't fit; just that it will be bottle-necked by the previously available headers. I have not verified this myself; as my '08 has not arrived yet. It's just something to consider when selecting YOUR headers for the Gen IV...
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Dyno Dave
Enthusiast
Yes, specifically what I've mentioned is about the '08.Dave, you are talking specifically about the -08?
mjorgensen Woodhouse
Enthusiast
They are a completely new design and I doubt they will be compatible.
mjorgensen Woodhouse
Enthusiast
We are on the way to the dyno this morning and will soon have the baseline numbers from our dyno. (Mustang dyno)
rcl4668
Enthusiast
mjorgensen Woodhouse
Enthusiast
We did the baseline today on our standard Mustang dyno so the numbers are not as "impressive" 
as some but are accurate at 602 crank hp (481 whp) . We did 4 runs back to back with the car warm and the numbers were all very close to the same, which is good. We will have the headers/exhaust on and to the dyno tomorrow. We will not be putting on the miles needed to get the most hp out of the headers as they will gain down the road but we should get a good picture of their potential and change to A/F.
The 08' ran VERY rich above 4700 rpm so the gains up top will be significant I'm sure. We will post more very soon!
as some but are accurate at 602 crank hp (481 whp) . We did 4 runs back to back with the car warm and the numbers were all very close to the same, which is good. We will have the headers/exhaust on and to the dyno tomorrow. We will not be putting on the miles needed to get the most hp out of the headers as they will gain down the road but we should get a good picture of their potential and change to A/F.The 08' ran VERY rich above 4700 rpm so the gains up top will be significant I'm sure. We will post more very soon!
rtigert
Enthusiast
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