[dgt_mustang]

Which is better for MPG,
Aluminum Driveshaft

Underdrive pulleys

Dualing out the car with high flow CATS and Flow 40/s

[6er_w/a_Vengance]

i would asume #3...but im usually wrong

[Baker02125]

ummm i went from duel flowmasters to LTs highflow cats H pipe and flow 40s and my MPG went down and my mechanic said it was normal so id cross 3 right off... and CAI isnt noticable... and niether is udp... all together you may see some difference

[DeMello]

change number 3 to an o/r pipe and it'd have my vote

[dgt_mustang]

now if your saying o/r pipe for sound then im not into it right now, but if its for MPG then yeah, id change it.

[DeMello]

Originally Posted by dgt_mustang now if your saying o/r pipe for sound then im not into it right now, but if its for MPG then yeah, id change it.

well it creates a better flowing exhaust then with cats

when i changed just my midpipe i got an extra like 10-15 miles out of a full tank

[whitemustang02]

Originally Posted by DeMello well it creates a better flowing exhaust then with cats when i changed just my midpipe i got an extra like 10-15 miles out of a full tank

but you have a GT not a V6
on the 6 the cats help with back pressure so you get more low end tq, witch helps with gas millage, particularly in the city.


and DGT i would say either go with the ud's or the aluminum DS. not sure which will help more but i would go with which ever you can get cheaper.

[DeMello]

thank you for correcting me

its nice to learn shit

(even if its bout a lil sixxer lol jk)

[itschristorres8]

an aluminum driveshaft will not help gas. i said pulleys

[Youngin]

id vote UDP. but is a tuner out of the option?

[whitemustang02]

Originally Posted by DeMello thank you for correcting me its nice to learn shit (even if its bout a lil sixxer lol jk)

no problom.

and better watch what you say to this little sixxer, cause i now also have a v8 with 69 more cubes then you

[Avaric3]

Originally Posted by whitemustang02 but you have a GT not a V6 on the 6 the cats help with back pressure so you get more low end tq, witch helps with gas millage, particularly in the city. and DGT i would say either go with the ud's or the aluminum DS. not sure which will help more but i would go with which ever you can get cheaper.

back pressure has nothing to do wit low end torque, the less back pressure the better. id go wit underdrive pulleys and a handheld tuner for gas mileage

[MIA]

Originally Posted by Youngin id vote UDP. but is a tuner out of the option?

+1

[NavySeabee87]

i say u have a sixxer, you dont need to worry bout mpg, you already get more than us guys with gt's, you got what u need already

[Tlord18]

I have no idea but i do know that for every 100 pounds you take off a car you gain about 1 MPG.

[GreenFaleen]

pulleys if anything since the engine will be running less items which means less gas needed to accelerate the car at partial throttle but dont expect much gain in mpg

[JTS]

gas is starting to go down lil by lil so dont worry about it lol

[dgt_mustang]

its is a sixxer but like everyone else i want to get the most out of my car, looks like UDP pulleys FTW,

just for a reference, i actually found the three piece set of UDP, everywhere else i kept finding two pulleys but here is a three peace, will these work?
JET Performance 90151 - JET Performance Underdrive Pulley Kits - summitracing.com

edit* i already have a tuner, thats why its not listed.

[itschristorres8]

Originally Posted by Avaric3 back pressure has nothing to do wit low end torque, the less back pressure the better. id go wit underdrive pulleys and a handheld tuner for gas mileage

sorry but this is false
get long tubes with dual 3inch pipes no cats or mufflers no back pressure at all and see if you get a performance gain. low end power will be horrible
so will mid range and even top end cause thats way to much

the more back pressure you have the better your low end but top end will suffer
less back pressure is the opposite.
so you want something in between

[6er_w/a_Vengance]

so a good setup would be LT's, (x or h) pipe, high flow cats, good mufflers...or am i missing what u guys are saying...