The truth about chips & Gears on your SC.....
3.73s are the proven best choice for gears on AOD cars.
PROS...
Increased acceleration
Potentialy More top speed on a modified motor if the OD band will hold
CONS...
you will be running about 3000rpm @70mph,
sacrifice about 2-5 mpg (dependant on individual car)
Car will not downshift to low at speeds above 20mph
The truth about chips on the SC...
Not a good choice unless they are flashed on a dyno to get the best safe power for a modified engine.
The stock PCM will do just fine, even with bolt-ons & up to 38 lb injectors,with a 190 or 255 lpi fuel pump.
Save your money unless you have done extensive mods like....
S-model SC or Magna port, & induction mods, FMIC
exhaust, headers
larger MAF, TB, 42lb or larger Injectors, 255lpi fuel pump.
The truth is you can get an SC with just bolt ons
3.73 gears and a
stock PCM to run high 13 to low 14 sec 1/4 mile times.
And I do reccomend APTEN when the time comes for a tune. there are others out there who can
FLASH CHIPS correctly or even the
EEC tuner (
MN12 Performance)which I run, but few no how to properly tune with it.
Off the shelf chips (those without being flashed according to a dyno run) while they work great on some cars do little or nothing for the SC
In your specific case I'd definately address the fuel system before looking into a chip. & then maybe give the guy a shot as long as your tuning on a dyno with an o2 sniffer to get proper A/F ratio readings. With an improved fuel system you should easily get 20-40 rwhp from a good tune..
You may want to get a base line pull now so you know where you stand.