I wouldn't be counting on much of an increase in mileage. Fuel mixtures are
closely controlled by the PCM by reading exhaust gas oxygen content.
What are you currently getting for fuel mileage.... and, please, try to keep
everything regarding this subject in one thread to avoid any possible
Sounds to me like some kid wants to put headers on and needs an excuse.
Increase in HP is less than 5% on the up side... usually less. And that
only occurs in the higher rpm's.
Radical headers that will give low RPM gains cost a LOT, and often screw
up the fuel management system.
For 'seat of pants kick', paint the manifolds with high-temp and pretend
it's something that makes it run better... same result. You know.. like
when you wash and detail the truck.
Increase in economy is negligible. You'd do far better in looking for
fuels that have least ethanol in them,
Economic Payback, looking optimistically, would occur at just about the
time the truck is hauled off to the crusher.
Take a tip from a geezer that was THERE in the early sixties when Headers
first became something you could buy instead of make. Car manufacturers
used to just bolt on exhaust components that would physically fit without
much regard to how they actually performed. ( See 59 Pontiac Bonneville)
That has not been the case for years. Exhaust tuning is a good way for
manufacturers to get a fraction of a gallon in EPA mileage.. because it's
- - - -- - - - - -- - -
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!
Starting to sound more like a used car lot.... one with a rather eclectic
selection of "cream puffs" (I've been itching to use that word in a sentence
for years...."eclectic" - has kind of a yuppy bastuhd ring to it, no?).
Once the fleet started "growing", I started wondering if "iola" wasn't
related to MustangGurrrlll.... Is there a full moon going on????
You'll just have to trust me on that. Unless your are
constantly demanding peak performance or in a competitive
situation, headers are pretty much a waste of time and money
in addition to adding to the maintenance when you have to
replace the gaskets periodically. A few years ago, I was
using my F150 for some max rated tows and installed a set of
equal length headers that was supposed to be the best for
the job. Right off the bat, I had an EGR fault -r replaced
EGE that had been sort of OK with manifolds and stock
exhaust. Gas mileage was never any better. I know this
because I have a log of every mile the vehicle has ever
traveled. If the performance is any better even at max
power, I have not been able to notice it. The noise level
in the cab is very noticeable and they are a b***h to
replace the gaskets. You will probably never see any
increase in fuel mileage. I have never seen anyone who
experienced a mileage increase w/o also installing a high
flow cat and exhaust. Then, they usually used the evtra
performance for - extra performance with a lead foot leading
to reduced fuel mileage. You decide. This is something
that every performance minded driver must experience for
himself before declaring that common sense is better. If
headers increased fuel mileage in normal driving, every car
sold would have them. After all, they spend millions of
dollars evaluating such things.
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