Curiosity has the best of me. MPG.

**JT2002GTP** · 07-26-2013

I'm getting 6 mpg less now after light mods, is this normal ? I'm not complaining just curious. Or is it just that I have a hard time driving it without the twizlers spinning. 02 gtp, catless down pipe,jmb fender intake, 180 stat, 605 plugs, wbody flashed PCM, modular 3.5 pulley.

**Scottydoggs** · 07-26-2013

if your driving it with your foot to the floor, yeah, mpg will suffer. re set the dic. and drive it like a old lady for a few days. see what you get then.

**TLSheff** · 07-26-2013

Errmmmm.... I'd say you have bigger issues.

I say this because I drive my 99 like the money grubbing dirty hooker she is... I swear she owes me money.

I have this addiction the Wha- Whiiiiiiiiiiine noise at full throttle. If it breaks it breaks, that's what spare parts and maintenance is for right? I drive 80% city too, light to light playing, making Rustangs and Civics mad, making Vettes and Maros wonder what I'm thinking, IDGAF.

19mpg on the DIC, about 15 just city by my calculations.

**REDCRAPGP** · 07-26-2013

Yea I believe a tuneup is in store.

**JT2002GTP** · 07-26-2013

Well, I'm right in the ballpark then, 28.6 granny driving b4 mods, 22.6 after mods granny driving.

**matt5112** · 07-26-2013

Amazingly enough, you'd get some fuel economy back by going to 606 plugs, and a 195 t-stat. If I had one of these again, that's what I'd run with the fans set to I at 205 and II at 215.

Also you might be running into the cat test issue. Is your rear O2 sensor connected?

Originally Posted by TLSheff

Errmmmm.... I'd say you have bigger issues.

I say this because I drive my 99 like the money grubbing dirty hooker she is... I swear she owes me money.

I have this addiction the Wha- Whiiiiiiiiiiine noise at full throttle. If it breaks it breaks, that's what spare parts and maintenance is for right? I drive 80% city too, light to light playing, making Rustangs and Civics mad, making Vettes and Maros wonder what I'm thinking, IDGAF.

19mpg on the DIC, about 15 just city by my calculations.

I was about to say, no way you'd get 19 driving like that.

15, yes.

**ericspecullaas** · 07-26-2013

Originally Posted by Scottydoggs

if your driving it with your foot to the floor, yeah, mpg will suffer. re set the dic. and drive it like a old lady for a few days. see what you get then.

HAHA i cant do that. When i go to work i hit a highway in about 2 mins so for me driving like grandma wont do. They love to do 80 or 90 here so yeah MPG whats that lol.

**TLSheff** · 07-26-2013

Sputtering down the highway on the weekends for Date Nights with the GF bumps it back up on the DIC

Reality figures tho are much lower. City is killer.

But 6MPG is crazy low, Unless you stay in 1st everywhere you go and don't care about driving at 5500 rpms to work.

**Scottydoggs** · 07-26-2013

Originally Posted by ericspecullaas

HAHA i cant do that. When i go to work i hit a highway in about 2 mins so for me driving like grandma wont do. They love to do 80 or 90 here so yeah MPG whats that lol.

if your on the highway asap, your mpg should be great. lol and you can drive like miss daisy on the highway. light on the pedal. thats all you can do.

some honda boy was changing lanes back and fourth earlier when i went out, ( for no reason) so i got up to him, floored it and looked for that wtf look from him. yes i got the look lol he can have that fart can......my car whines, take that ricer.

**JT2002GTP** · 07-26-2013

Im not sure what wbody set fans at, they do stay on now after turning eng off. Would I lose any perf running 606 plugs ? 02 sensor deleted in PCM flash.

**matt5112** · 07-26-2013

Originally Posted by TLSheff

Sputtering down the highway on the weekends for Date Nights with the GF bumps it back up on the DIC

Reality figures tho are much lower. City is killer.

But 6MPG is crazy low, Unless you stay in 1st everywhere you go and don't care about driving at 5500 rpms to work.

The OP states 6 mpg less than he used to be getting. Still not a very useful figure though.

Originally Posted by JT2002GTP

Im not sure what wbody set fans at, they do stay on now after turning eng off. Would I lose any perf running 606 plugs ? 02 sensor deleted in PCM flash.

Well how are the 605's burning? Do you have much KR? and so on.

If they're a little cold, then it will run and idle better with the 606's. Will be a touch more prone to KR, but I'd pulley up if that's the case.