well about 2 months ago i got a new set of rims & tires & i noticed that my gas mileage got real shitty
and prior to that i noticed that my car uses alot of oil.

what can cause it ???

 

Seems like you got heavier rims... Typically heavier/bigger rims will cause your gas mileage go to ****...

The oil thing.. i have no idea... Bad piston rings? Bad seal?

 

bigger rims shouldnt kick your gas mileage bad, some but not bad.

what rims that you got? rotational mass is a bit-h

the oil have nothing to do with the rims/wheels

 

well i got a lighter rim than what i used to have, 17"
i went from 195-65-15 to 215-45-17

as for the oil, i change the oil every 3 months, (about every 1000 miles)
car dont smoke & dont idle above 800rpm

but i do have a bad exhaust leak

how do u know if the piston rings are going bad ??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RUBZERK &raquo;</TD></TR><TR><TD CLASS="quote">but i do have a bad exhaust leak</TD></TR></TABLE>

how bad, or have you checked this more thouroughly

 

Its that bad that i can put my hand over the tailpipe & my hand is not forced away.

sounds like a whoopie cushion whan i give it gas

 

time for the magnaflow you have been considering!

 

is your exhaust smoke a specific color???? are you leaking oil?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RUBZERK &raquo;</TD></TR><TR><TD CLASS="quote">but i do have a bad exhaust leak</TD></TR></TABLE>

New exhaust. Recommend custom after I just got mine. Universal muffler, piping, and labor cost me $250 out the door.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RUBZERK &raquo;</TD></TR><TR><TD CLASS="quote">how do u know if the piston rings are going bad ??</TD></TR></TABLE>

Compression test, I think?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RUBZERK &raquo;</TD></TR><TR><TD CLASS="quote">well about 2 months ago i got a new set of rims & tires & i noticed that my gas mileage got real shitty, what can cause it ???</TD></TR></TABLE>

The PSI in your tires can also change your gas milegae. Be sure to have the proper inflation.

 

Well last night i just bought this magnaflow


& im getting 2.25 piping from cat back, no resonator.


Car does not leak oil or smoke.

As for tire air pressure, its good

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D16Z6racing &raquo;</TD></TR><TR><TD CLASS="quote">

Compression test, I think?
</TD></TR></TABLE>




And that new exhaust will help out your mpg too (back pressure) and a complete system. You should be happy with your choice, how much did it run you?

As for your mpg, check your spark plugs, air filter, plug wires, dizzy. You may also want to run some bg44K through your system too

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RUBZERK &raquo;</TD></TR><TR><TD CLASS="quote">well i got a lighter rim than what i used to have, 17"
i went from 195-65-15 to 215-45-17

</TD></TR></TABLE>

do you mean the rim weighs less?

Even if it weighs less on a scale, it will weigh more on your car due to physics.

Also, the wider tire will decrease your gas mileage.

 

Muffler is running me $79.60 free shipping.
And $95 to install 2.25" pipe mand bent from cat back.
with lifetime replacement

 

j00 get piping from kteller????

if i go FI i think im gonna use his 3" piping

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SearchBeforeUPost! &raquo;</TD></TR><TR><TD CLASS="quote">do you mean the rim weighs less?

Even if it weighs less on a scale, it will weigh more on your car due to physics.

Also, the wider tire will decrease your gas mileage. </TD></TR></TABLE>


which physics make something weigh more when mounted on a car?
does teh car have some sort of gravitational field that is different from the earth's???

 

no smart ***, but the bigger the diameter of the wheel, the more rotational inertia it creates. You would be the last guy I would expect to hear a question like that from. Also, we could get into sprung v. unsprung weight.

If you test the acceleration of a car with a set of 15" wheels, and then with a set of 17" wheels that weight the same as the 15" wheels, the acceleration will be quicker with the 15"s. Damn Willie, I am getting worried about you.

 

Here is an excellent thread to read:

http://www.cb7tuner.com/vbb/sh...=5713