No cats or muflers=poor gas mileage?

[Motorhead350]

I was driving around the other day with my mufflers and exhaust bypassed because of my header dumpers and my friend told me that it's killing my gas mileage. Since I was driving my Blazer in the city and letting that V8 roar at every stop and go light, he told me I must be getting 5mpg because of the cutoffs. Now I think he might be right as far as gas mileage being down the tubes because of my driving style, but I don't think you can go from 9mpg in the city to 5 just because of no cats or mufflers. Am I wrong, right or a little off?

[Grifter]

i dont know, but i do know that it gets 6 posts..

[LILALLEYKATT]

i dont know, but i do know that it gets 6 posts..
Ya missed your calling as a comedian....

[Motorhead350]

i dont know,..
Thanks anyway.

[Leadfoot281]

I was driving around the other day with my mufflers and exhaust bypassed because of my header dumpers and my friend told me that it's killing my gas mileage. Since I was driving my Blazer in the city and letting that V8 roar at every stop and go light, he told me I must be getting 5mpg because of the cutoffs. Now I think he might be right as far as gas mileage being down the tubes because of my driving style, but I don't think you can go from 9mpg in the city to 5 just because of no cats or mufflers. Am I wrong, right or a little off?

You want to know if your gas milage has dropped?

Why not fill it up, drive around real crazy with open headers 'til the tank is empty, fill it back up and check the milage?

Then do the same thing with the header dumps closed. This should give you your answer.

[Motorhead350]

Thats one way, but before is lose 120 bucks I figured it might me a simple tech question.

[RR|Suki]

you're gonna use the gas anyway, someway some how, so it's no real cost to you...

[Motorhead350]

I just wanna know