chip MPG?

[scoobert]

has anyone gotten the 80 chip? did it hurt your mileage? did it help? what were your numbers for and aft chip? i do 90% city driving, i need good gas milage, but dont want the low power.

[sixnickel]

I put the SSDiesel Power pkg. 2 in my 2000 K3500SRW (4.10s auto)I drove the truck about a month with the exhaust and intake on it without the ECM. I did feel a improvement in performance an picked about 3 MPG on the highway. When I did install ECM WOW!!! It woke it right up (Bring on the Power Jokes) But I lost the 3 MPG on the highway. Iget about 17 MPG at 70MPH on cruise control. The thing that hurts me is the 4.10s. Some day I want to put a Gear Venders OD/UD unit on it. With that on it I should see about 1800 RPM at 70 MPH not 2350 RPM and 20/21 MPG. My 99 Burb with 3.42s and a 40 hp ECM and stock exhaust gets 20 MPG@1900 RPM. Some day that will have the 4" exhaust and I expect to get 22/23 MPG

[scoobert]

isent the 4" system overkill? i thought of doing a 3" DP and bye bye cat, but not the whole 4" system.

i have the low gears in my truck, like 3.6 or whatever. i know at 100 i am pushing 3400RPM's. but all said and done i get 13MPG 80%city and 20%highway

i would like to see 17 at that ratio.

[sixnickel]

Ya it might over kill but in exhaust bigger is better and it looks good.

[christja]

I found a 10 foot 3 1/2" piece of thin wall galvanized pipe at a scrap yard local to me that i got for $45. I think thats good enough..

[nathan]

i just went to the local exhaust shops and found someone that was pulling the factory pipe of a d max for 4 or 5 inch and then i got there 3.5 inch for free.