I live in Northern IL too, little bit south of Naperville, and I leave
my cold air intake on all winter long on my 05 4.7. Haven't had any
adverse affects for 5 years now.
Gary
On Sat, Sep 18, 2010 at 5:39 PM, MICHAEL CABE <mikecabe@prodigy.net> wrote:
>
> ray,
> thanks for your post and jon your input.i have one more question.i live in northern illinois and it can be below 0 for a few days and in the 0 to teens the rest of the time.should i leave my k&n setup on in the winter or could the cold affect my truck in some way? now i got some reading to do . thanks again guys.
> mike
>
> --- On Sat, 9/18/10, Ray Block <BPracing@wowway.com> wrote:
>
>> From: Ray Block <BPracing@wowway.com>
>> Subject: RE: DML: Re: K&N fipk
>> To: dakota-truck@dakota-truck.net
>> Date: Saturday, September 18, 2010, 12:28 PM
>>
>> > -----Original Message-----
>> > From: MICHAEL CABE
>> >
>> > ray
>> > i will check out all those links. thank you.i guess my
>> thought is,even
>> > with modest mods (exhaust,air intake)are the factory
>> settings in the
>> > computer able to make the best of said mods without
>> some sort of
>> > reprogramming?
>>
>> The short answer is yes. In part throttle
>> driving the PCM will read the O2
>> sensor, Intake Air Temp (IAT) sensor, MAP sensor and the
>> Coolant Temp Sensor
>> (CTS) to determine the proper Air/Fuel ratio regardless of
>> any mods.
>>
>> During Wide Open Throttle (WOT) the PCM ignores the O2
>> sensor and refers to
>> predetermined parameters (lookup table) to adjust the
>> timing and A/F ratio.
>> Typically, all factory computers (ECM or PCM, whatever you
>> want to call
>> them) are programmed to be extra rich at WOT to prevent we
>> idiots from
>> causing any engine damage. For a racer this can be
>> detrimental to maximum
>> performance but there are external ways to
>> compensate. A mostly street
>> vehicle wouldn't know the difference.
>>
>> > i haven't looked at your links yet so maybe after
>> doing so
>> > i will understand more about "speed density systems"my
>> next question is to
>> > the group.have any of you reprogrammed for fuel
>> economy or performance or
>> > both? i would like to stick to the 4.7 on this
>> subject but all
>> > experiences too.thanks again ray.
>> > mike
>>
>> I acquired a Superchips tuner several years ago for my Jeep
>> 4.7. (same one
>> is used for Dodge truck 4.7s) I've tried the
>> "economy" and "performance"
>> modes. The fuel mileage difference is
>> negligible. The performance mode
>> does show a slight performance improvement at the track but
>> it is not
>> significant enough to "feel" on the street.
>>
>> FWIW, when I race the Jeep without the tuner I use 87
>> octane fuel. Higher
>> octane didn't do anything for it. If I use
>> the Superchips performance mode
>> I run 92 but can't confirm it really needs
>> it. I've run just as good times
>> with 89 in most weather conditions.
>>
>> Hope this helps.
>> Ray
>>
>>
>
>
>
-- Gary Hedlin Show Car Signs by Hedlin Designs www.showcarsign.com--Many talk about those who died, but too few talk about those who survived... THANK A VET!
This archive was generated by hypermail 2b29 : Mon Nov 01 2010 - 10:47:31 EDT