Re: MPG with Mods

[QSHIPQ@aol.com]

In a message dated 97-02-17 00:28:53 EST, you write:

<< > All, as rediculous as this sounds I am now getting better gas mileage
 > than I have EVER gotten with this car.  With the mixture set correctly
 > (Thanks PDQSHIP), and then home-grown ECU mod, I am now seeing 37 mpg on
 > the higway with the cruise set at 72 mph.  Strangely enough though when I
 > back it down to 68-70mph range, the mileage is cut to about 35 mpg.  I am
 > assuming that this is due to the mixture setting at a given RPM range un
 > the ECU lookup table.
 
 Jeez, Scott, I am seeing 18mpg on a good day! Can you walk me through
 the same procedure?
 My OXS sensor is still the original one, probably is due for
 replacement.
 
 Thanx,
 
 Igor >>
This is in the archives about a year ago.....  Don't quote the dash guage,
unless you have personally calibrated it with the odometer vs gallons....  It
usually would make any CAFE fed get giddy....  The best of tuned cars in the
5ktq family under my direct supervision, have gotten 28 highway, 19-21
city....  The extreme chipped and RS2'd car (Carole) gets 32 highway, 21
city, and I assure you the boost is at the barest of minimum (no matter what
she claims)....  I consider a 30 number the max for any "reasonable" turbo
5ktq highway, and 21 the max for city....  A box modded 5ktq will not lose
mileage unless you put your right foot down, PDQI has a record of <12mpg for
a tankful of test gas with the monster RS2 Comp+++....  The worst I've seen
with stage II mods and a stock turbo is about 16 city, driven really hard....
 

A set of the O2 FV is the key to maximizing your mileage, requires a DC or
Dwell meter for the tweek....  Proper plugs, wires, synthetic oil, free flow
air filter, and good gas are all keys in the equation....  The best O2 is
considered a 30k part (claims of 60k from bosch are for N/A cars) for turbos,
my dodge turbo would eat them in <10k, I get about 20K out of the audi turbo
O2, that's it.  Remember, the more mods you run (hello bypass valve), the
less your O2 will last.    The more fluctuation you get on the O2 FV port,
the worse your O2, IOW, if you are looking for 42DC and you get massive
fluctuation there, the O2 is prolly bad, the newer the O2 the less the
fluctuation....  O2's as they age, get slower to react to exhaust gasses,
showing as more fluctuation on your dwell or DC meter....  That delay on a
stage II box can be "deadly"....  A stage II will run O2 lean between
3-4500krpm, you have a bad O2, situation critical....

HTH

Scott