Increased TQ under 2000k RPM's
#11
08-19-2008, 01:08 PM
After looking at all my options, I'm not going to undertake the headers quite yet. Thank you for all the information, it helped me to decide I will go the standard route. I'm now deciding between the Volant or Ram Hammer intakes, Magnaflow duals or Gibson super truck, and will get the SCT. Mostly for the reason Dodge dealerships across the board see these modifications everyday, the cam would be a hard fight in the long-run if something happened even in spite of a correct installation. I will be dynoing the truck after every modification and taking MPG readings and will be sure to post my results. I do expect the small loss of Torque at the low RPM band, but you never know, I may be pleasantly surprised to find otherwise, even if its a long shot.
BTW: My local dealership voids your warranty if they find evidence of a "custom tune" but not if they see a "canned tune". Not trying to sway you, but just giving you a heads up...
#12
08-19-2008, 01:16 PM
I'm glad to know they have the broad authority to decide unilaterally what voids a warranty or not, without regard to silly things like federal law and proof that it caused the problem. I'd have a field day with them.
Well, that and I also realize that by screwing with my truck, anything I do break is my fault and I wouldn't change it all back to stock and try to trick them into fixing it.
Well, that and I also realize that by screwing with my truck, anything I do break is my fault and I wouldn't change it all back to stock and try to trick them into fixing it.
#13
08-19-2008, 01:39 PM
I'm glad to know they have the broad authority to decide unilaterally what voids a warranty or not, without regard to silly things like federal law and proof that it caused the problem. I'd have a field day with them.
Well, that and I also realize that by screwing with my truck, anything I do break is my fault and I wouldn't change it all back to stock and try to trick them into fixing it.
Well, that and I also realize that by screwing with my truck, anything I do break is my fault and I wouldn't change it all back to stock and try to trick them into fixing it.
However, there are many different ways to interpret Magnuson/Moss. Parts/Service and I had a pretty good debate on this a while back because he & his dealership don't particularly believe it pertains to vehicles, or at least to the degree that I do...
#14
08-19-2008, 02:01 PM
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I will go with the Superchip then. On the cam, its not that I wouldn't mind doing it but I would assume if the end user modified an internal component like a cam shaft that you could have a very good reason to void internal engine damage even if the cam wasn't a direct result. I know the MDS is not the best for a number of reasons but I would not want to give Chrysler any ammo. If its sealed at the factory and stays that way what can they really say against a claim. I know the thread is getting off topic, just didn't seem pertinent to start a thread pertaining to warantee's over internal engine modifications.
#15
08-19-2008, 08:47 PM
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Retarded ignition timing
will be most felt in the 1500 to 2000 rpm range
where is shows up as reduced torque.
Since the 5.7 has dual spark plugs
it might be worth considering
to remove one of the oem Champion plugs from each cylinder
and replace it with an iridium tipped sparkplug
with a very large gap,
say 0.060 to 0.080 inches
The tiny iridium center tip
should be able to fire such a large gap
and the iridium should keep the gap from growing with age.
The longer spark on one plug
might increase combustion speed
without causing misfires
and improve low rpm torque
You could also use the 8 oem plugs
to 'index' your remaining 8 oem plugs' gaps
to the best orientation
where the ground post only blocks the flame path
either toward the center
or toward the outside wall
leaving all other paths open
to encourage fast combustion
will be most felt in the 1500 to 2000 rpm range
where is shows up as reduced torque.
Since the 5.7 has dual spark plugs
it might be worth considering
to remove one of the oem Champion plugs from each cylinder
and replace it with an iridium tipped sparkplug
with a very large gap,
say 0.060 to 0.080 inches
The tiny iridium center tip
should be able to fire such a large gap
and the iridium should keep the gap from growing with age.
The longer spark on one plug
might increase combustion speed
without causing misfires
and improve low rpm torque
You could also use the 8 oem plugs
to 'index' your remaining 8 oem plugs' gaps
to the best orientation
where the ground post only blocks the flame path
either toward the center
or toward the outside wall
leaving all other paths open
to encourage fast combustion
Ive always known it to be that retarding will give you mushy bottom end and advancing gives you a crisper bottom end.
#16
08-19-2008, 10:34 PM
Yep, advancing the timing will increase low end power. Also, two mistimed flame fronts will cause major detonation. Not Good for head gaskets and pistons.
A good tuner (like the Predator if ever released) will give gains in the low rpm dept. It did on my 01 Ford, by advancing the timing and eliminating the tip-in retard. They are well wroth the money. Lower gears as mentioned will help as well, but may hurt highway MPH.
A good tuner (like the Predator if ever released) will give gains in the low rpm dept. It did on my 01 Ford, by advancing the timing and eliminating the tip-in retard. They are well wroth the money. Lower gears as mentioned will help as well, but may hurt highway MPH.
Last edited by lxman1; 08-19-2008 at 10:36 PM.
#17
08-20-2008, 07:34 AM
Both the original Dodge 5.7 Hemi dual plugs (wasted spark system)
and Mercedes V8 dual plug firing systems
were designed not to fire the two sparks
at exactly the same time
to promote turbulence and faster burn in the combustion chamber.
As many know here
Dodge originally try to bolster this effect
with 2003 5.7 Hemi unequal length ignition wires that crossed over,
but then gave up on that
for cost of extra wire reasons
It is not bad
to have the sparks at slightly different times,
it is good
and Mercedes V8 dual plug firing systems
were designed not to fire the two sparks
at exactly the same time
to promote turbulence and faster burn in the combustion chamber.
As many know here
Dodge originally try to bolster this effect
with 2003 5.7 Hemi unequal length ignition wires that crossed over,
but then gave up on that
for cost of extra wire reasons
It is not bad
to have the sparks at slightly different times,
it is good
#18
08-20-2008, 12:15 PM
I'm not surprised any dealership rep would disagree on the M/M warranty act. Having sold cars, it doesn't surprise me one bit that dealership management would somehow think it didn't apply to them even when there is plenty of evidence to the contrary.
People are usually sheep and will blindly accept it when they're told their warranty won't cover it. Some may threaten a suit but never follow through with it. On the other hand, I am just as hard headed and if I believe I am in the right, you can bet I'll see it to a proper conclusion.
As I said before, I also believe just as strongly in the "if you break it, you pay for it" policy too. It's not just words either - I blew the turbo in my car twice and never asked Subaru to pay for it. (After the second one, no more stock parts - it's now all aftermarket) Too many people put all the stock parts on and try to claim it under warranty. A warranty is not a "get out of jail free" card and shouldn't be treated as such. By the same token, I will laugh if somebody says my intake means my rear diff won't be covered if it blows up due to a LSD clip issue.
#19
08-20-2008, 12:24 PM