Here is my M6 Trans Am gas mileage with cam/headers

**Hurley711** · 07-25-2006, 02:26 PM

First the details....I drove from my house in NE Philly to the Joisy shore and back. I had the T-Tops off and windows down for both rides, which from what I understand would worsen gas mileage with the extra drag on the car. I drove in stop and go for around 20 minutes total, the rest was pretty much 6th gear using 5th to pass. I launched like a bat outta hell at ALL ligts and toll booths. Here are the stats:

211.6 miles total
8.11 gallons of gas used=
26.1 miles per gallon rounded off (26.091 to be exact)

Not bad huh? I figured for around 20 or so with all my mods(in sig below), 26+ is a major surprise/bonus for me. To have a hog in the driveway with 425+ hp/tq and still get 26 mpg I am happy

**30thbird** · 07-26-2006, 07:59 AM

Sounds normal for a easy drive in an Fcar M6. How is it came to the "425+hp/tq " rating? Which is it , hp or tq?

**Fade2Black** · 07-26-2006, 10:34 AM

it seems like i dont get much..
and im stock..

**Fade2Black** · 07-26-2006, 10:35 AM

how can u tell exactly?

**Zboner** · 07-26-2006, 10:37 AM

man, i remember when that car was a stocker, lol. its nice to see it grow up like mine has

**Hurley711** · 07-26-2006, 12:47 PM

Originally Posted by 30thbird

Sounds normal for a easy drive in an Fcar M6. How is it came to the "425+hp/tq " rating? Which is it , hp or tq?

Dynoe #'s in sig, did you miss that? Put down 399 hp & 397 tq which equates on a low estimate to 425 at the flywheel

**Hurley711** · 07-26-2006, 12:49 PM

Originally Posted by Fade2Black

how can u tell exactly?

I filled my tank all the way to the top. Drove the 200+ miles to and from using the odometer to track my miles. Then when I got home I refilled the tank and checked how many gallons it took. You divide the gallons into the miles to get your total

**Hurley711** · 07-26-2006, 12:50 PM

After I get home tom from work I am going to test again to see how my stop and go city driving affects the mpg, I do alot of heavy stop and go in the morning, I'll post the numbers tom or friday.....hoping for 18-20 in stop and go crap.

**Hurley711** · 07-27-2006, 04:39 PM

OK it got worse....significantly worse. MPG with tons of stop and go driving, I mean TONS, I got 17.5 MPG. Guess it's still not too bad for city driving with my mods.

**Mr. Luos** · 07-27-2006, 05:01 PM

I was getting 27.5 MPG on the highway when I was cammed with bolt-ons.
They do pretty good.
It was a 226/234 554/575 112.

**Zboner** · 07-27-2006, 05:05 PM

Originally Posted by Hurley711

OK it got worse....significantly worse. MPG with tons of stop and go driving, I mean TONS, I got 17.5 MPG. Guess it's still not too bad for city driving with my mods.

I GET THAT HIGHWAY

**Mr. Luos** · 07-27-2006, 05:06 PM

Hell, getting 16 MPG with the 'baby' cammed 402 around town if I drive it light.
Soon to change though...4.11's.

Around town with the 226/234 I could get 22.5 MPG.

**hurtindude** · 07-28-2006, 07:03 AM

Originally Posted by Hurley711

First the details....I drove from my house in NE Philly to the Joisy shore and back. I had the T-Tops off and windows down for both rides, which from what I understand would worsen gas mileage with the extra drag on the car. I drove in stop and go for around 20 minutes total, the rest was pretty much 6th gear using 5th to pass. I launched like a bat outta hell at ALL ligts and toll booths. Here are the stats:

211.6 miles total
8.11 gallons of gas used=
26.1 miles per gallon rounded off (26.091 to be exact)

Not bad huh? I figured for around 20 or so with all my mods(in sig below), 26+ is a major surprise/bonus for me. To have a hog in the driveway with 425+ hp/tq and still get 26 mpg I am happy

damn that is impressive. My trans am definatly got more miles per gallon then my cobra. I don't even get 200 miles per tank.. given it is a small tank

**Roastem** · 08-08-2006, 11:56 AM

Originally Posted by Hurley711

Dynoe #'s in sig, did you miss that? Put down 399 hp & 397 tq which equates on a low estimate to 425 at the flywheel

Low estimate is right. I put you at 458HP/456TQ, and that is with a 13% drivetrain loss. If you had an electric water pump (<--that b*tch is expensive BTW) and minimal accessories, you would be pushing around 500 at the motor. Pretty stout for an N/A small block, ANY N/A small block.

I am sure it pulls hard now, but you know the STOCK LS7 makes more power than that, just imagine if you had one of those babies in there with a monster cam and long tubes...that thing would make you

your pants when you drop the hammer.

**ss~zoso~ss** · 08-08-2006, 12:41 PM

i get 13 at best around town and i dont beat it much at all, i'm getting my plugs changed tomorrow and i'm hoping that is the problem

**Hurley711** · 09-10-2006, 05:53 AM

Just an update here fellas. On the recommendation of Sarge I went out and bought FP60 and starting using it. Well I did my routine stop and go work driving, this time with the FP60 in the tank. Numbers were:

136.1 miles driven
6.832 gallons used=

19.9 MPG........UP from 17.5

FP60 is the shit, I came home with an extra 1/4 of a tank of gas last week...not a misprint, an extra 1/4 of a tank than I usually have left

**ss~zoso~ss** · 09-10-2006, 06:57 AM

no figure out how much money you saved and then how much you spent on the treatment

**ss~zoso~ss** · 09-10-2006, 06:59 AM

looks like good stuff i'm gonna get some use it when the car sits over the winter

**Hurley711** · 09-10-2006, 07:04 AM

Originally Posted by ss~zoso~ss

no figure out how much money you saved and then how much you spent on the treatment

Treatment cost $44 for a gallon shipped, next time I am buying a bigger quantity. IT is worth the $$$ spent. 17 gallon tank rounded off x 2.5 MPG gain gives me 42.5 miles more to a full tank. Thta is $$$ well spent for only using 3 ounces per fill-up.