plastic thunder

I HAVE A 95LT1 COUPE WITH 37K ON THE CLOCK. THE ONLY MODS ARE A K&N AIR FILTER, A AIR FOIL, AND A 160 DEGREE THERMOSTAT. I DON'T WANT TO GET TOO RADICAL. WILL A HYPERTECH POWER PROGRAMER MAKE A NOTICABLE DIFFERENCE IN MY CAR. I NEED SOMETHING A MUSTANG PULLED ME ON A 80 MPH ROLL OFF. :cry

Springer's LT4

With your mods you might see a little gain... mostly they are recommended for changing the temp cooling fans come on, adjusting speedo for gear change ,etc. It won't be night and day thou.

LUDS 96

I've got an automatic trans the programmer allowed me to pick my shift points, set my rev limiter, and adjust my speedo after my gear change. It did not have a setting for the 3.54 gears so I put in a diffferent tire size. Then checked the speedo against a Garmin GPS. I spent a day at Lebanon they have test days sometimes and I was able to dial the car in with the programmer. I feal it's worth it's weight in Gold !!!!

plastic thunder

thanks for the info. i wonder how i can tell which gear ratio is in my automatic. could it be determined by the rpms at a given speed? :confused:

jay17

You should have either 2.59s or 3.07s unless someone changed them. I think the RPO code for3.07s is G92.

mackeyred96

When I used mine it worked OK. 12.4s with some bolt ons.

plastic thunder

I DON'T HAVE ANY OF THE RPO CODES. I DON'T HAVE THE ORIGINAL WINDOW STICKER. I BOUGHT THE CAR IN APRIL IT HAD 34K ON THE CLOCK WITH THE ORIGINAL TIRES. I THOUGHT ABOUT ORDERING A DUPLICATE WINDOW STICKER AND BUILD SHEET FROM THE CORVETTE MUSUM WEB SITE. THANKS FOR THE REPLY :)

jay17

The RPO codes should be on the inside of your middle console lid :chevy

LT5

AAHHHH CAPS!!!!!!

plastic thunder

found the rpos. about 36 of them. is there a web site that will tell me what each of them mean? doing that should take me to christmas any way :D

Alex D

Hey plastic !!

Try the following web site http://www.gscorvette.com
There is a link on the bottom of the page that will display all 1996 RPO codes. The 1995 codes are identical. Look at my signature...if you find the G44 G92 RPO codes, you have the performance axle ratio of 3.07. If you find GM1, you have the standard axle ratio...I think it's 2.56, but I'm not sure....anyway, there were only two ratios available on late C4s and the performance ratio is 3.07....I know that one for sure....

SOB ........ a Mustang pulled you at 80 mph:cry: ...must have been a five speed Cobra...I don't think a stock GT will be able to do that.....never pulled a Cobra, but have done some GTs in :lol:

plastic thunder

THANK YOU! :chevy I JUST PRINTED THE OUT AND CAN'T WAIT TO GET BACK FROM TURKEY DAY TO SORT THEM OUT. LOOKS LIKE I HAVE A COUPLE THAT ARE NOT ON THIS SHEET, BUT I'LL FIND THEM LATER. I DO HAVE A 3.07 RATIO AND THE PERFORMANCE RATIO REAR AXEL. GOT TO DO SOMETHING TO HER AND THEN GO MUSTANG HUNTING :D

Alex D

Hey plastic....
Lemme know if you have codes that are not listed. I can find out waht they are. I have the Helms manuals for my 96....they list all RPO codes...some are really meaningless to us.....you should find all the important ones on that web site......BTW we have pretty similar cars !! Do you have red interior too??
Still can't believe that a Rustang blew you away:sad:......do you know if it was a Cobra? or what...