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02stx
Dodge Dakota
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5/28/2007
23:01:40

Subject: Larry? mods that decrease MPG
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I am 17 and have about 600 bucks to put into my truck(cutting grass pays well). I intend to get dual exhaust with the 2 1/4 piping and a flowmaster delta flow 40 series, a cold air intake and a tono cover. all of the mods i plan to do i am hoping will help my MPG. Would the IAT relocation effect it for the worse cause in my mind (correct me if im wrong) if the computer reads a lower temp in the air it will effect the fuel by increasing th amout dispersed in the mixture therefore decreasing the MPG. also wil the V8 throttle body increase or decrease MPG because if more air is entering wouldn't that mean more gas too. any other sugestions on getting a few extra MPG would be greatly apreciated. also correct me if i am wrong in my theories as I think i might be.



nice1
Dodge Dakota
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5/28/2007
23:44:26

RE: Larry? mods that decrease MPG
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sorry i'm not Larry but can tell you i had all these mods and DID notice a slight decrease in MPG. The mods help a lot when everything is in tip top shape and you have good sensors but if you're like every other red blooded male you can't help but take advantage of the mods and your gas mileage will suck!! as for me, i drive 70 miles a day highway and need all the MPG's i can get and have returned everything to factory except the flowmaster 50 series. check your mileage now then after a good 300 miles after all your mods and see if it differs. Despite the controversy over K&N improving MPG i have also gone back to the parts store brand air filter in the trek to saving more gas. I also believe more air in equals more power generated equals more gas used but some will argue till they're blue in the face! all trucks are different and i know Larry has a ton of mods and gets killer gas mileage so there's an example for you how all are different.



J and J Auto
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5/29/2007
03:06:24

RE: Larry? mods that decrease MPG
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Yes I would suggest first having all good sensors
before anything else is done

Heres a good example of a bad sensor

First indication

flooded out starting

gas pushed truck not responding
reving but no fuel

idle begaining to searge up and down

These symptoms all happening in 1 week

scanner showed throttle position sensor jumping
from .5 to .6 volts at idle

Replaced tps with factory org

problems all magicly disapeared

You need all sensors working properly just like
TV do you like a clear picture so does the
computer and needs good signals to work properly
than your truck will run very well

All of the mods are good for power and gas
mileage but will hurt on the ones with lazy
sensors

I should also add this tps did not trip a code
for being bad either

I have been hanging right around 23mpg with my
95 4x4 all mods and boltons


Larry
J&J Auto

02stx
Dodge Dakota
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5/31/2007
16:07:18

RE: Larry? mods that decrease MPG
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so as long as my sensors are in check I would be fine?

so what about the IAT location that would be good for a little power and possibly MPg when joined wioth the V8 throttle body



N56629
Dodge Dakota
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6/01/2007
08:37:18

RE: Larry? mods that decrease MPG
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The IAT sensor relocation reduces gas mileage slightly and only increases power slightly. The v8 tb only makes a difference at or near WOT. If you are using WOT you probably are not too concerned about your gas mileage.



J and J Auto
GenII
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6/01/2007
23:43:07

RE: Larry? mods that decrease MPG
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locate the sensor 6" from the throttle body in
bottom of air cleaner or air tube

1/8 npt plug for hole sensor came out off

if wires need lengthen solder and heat srink
wrap usualy it will reach sitting just behind
the cable bracket

I disagree with the V8 body performance described
above

The V8 body just as is do not polish or mod in
any way shape or form bolt on as is

Use all your V6 sensors because you know there
good

start and stop truck 3 times inital now start
and let idle you do not have to do a hard reset

The V8 body off idle low end to about 1800 2000rpm
will be virtualy the same

from 2000 on up you will notice the increase in
power with peak gains dyno prove hundreds of times
15 to 18hp and 20 to 25 torque at the rear wheels

if you drive the same and sensably the gas mileage
will also improve 1 to 3 mpg

The V8 swap is not the best but is a good swap

The F&B and Fastman both show gains from off idle
to redline unlike the V8 from around 2000rpm up
but still a good swap

This is providing all your sensors are good
and the NUMBER ONE SENSOR the o2 has to pickup
the increased flow to add fuel and make power

Larry
J&J Auto

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