Already have my chip programmed by PCMforLESS.com, but I have no idea if my car is running as strong as it's capable of. Is there something out there I can use to display my O2 readings? Or something similar??? I know of Scanmaster LT1s, but I've been told that's only for MAF LT1s 94+....


Any suggestions???? I'm heading to a dyno machine here soon, what should I do to have it "dyno tuned"????


-93 LT1 Z28...

Thanks.

 

http://www.ttspowersystems.com/software.htm

 

About the only option with a 93 would be to find a facility that can burn chips to make changes. Can't really dyno tune a 93 unless they have that capability - they would have to run the car, erase the chip upload the new program - run the car...

I've had pretty good luck just sending Rooster a copy of my TTS data file - he seems to be able to work with that pretty good.

 

There are any number of ways to monitor O2's on a 93... the post above links you to DataMaster. You can use an Auto Xray scanner as well.

Once you get your O2 readings, you need to understand their limitations. Stock, narrow-band O2 sensors are intended to be accurate over a very limited range of 14.6-14.8:1.... the A/F ratio required for closed loop, part load operation. At WOT, when you are looking at A/F ratios in the range of 12.5-13.5:1, the sensors are not very accurate. A small change in sensor operating temperature will cause more of a change in the sensor mV readings than a real change in A/F ratio.

You need to be careful how much faith you put in the stock O2 sensors. Be sure to have your final tune checked with a wide-band, if you can.

 

I was thinking of maybe an Adjustable Fuel Pressure Regulator might help, but I'm unsure of 02 sensors, I have no knowledge of how they work besides that they are responsible for correct a/f mixture.

Does anybody have a range where I should be sitting @ WOT to achieve max power with my N/A LT1?

Oh, if it any difference, I changed the stock 02 Sensors to Bosch...., does anyone have any problems with them? Thanks for your guys' help so far.

So far, I'm thinking of buying a cheap laptop and a TTS package, then sending my chip out to a professional to tune it....

 

Check out this link:

http://www.thirdgen.org

Go to the message board, then the DIY-PROM forum, there's alot of info there on tuning yourself, and ways to set up your chip to burn them yourself. For my complete prom burning setup it cost about $200, plus $50-$60 for the cable to link the laptop to the ecm. Even though this is a third-gen site, pretty much everyone there is happy to help on a 93 as well. Also check out the tech articles on the same site.

 

Thanks, I think I'm gonna buy the TTS System and a laptop, then Record my Dyno with the TTS system and send the results to someone who's real good at flashing chips....

Anyone in particular I should go to to flash my chip beside PCMforLESS?

 

What's wrong w/ Alvin? If you are sending him the info he should be able to do as good as anyone and cheaper. If you aren't real happy w/ his 1st chip just remember he's tuning your car from guestamations and not your actual car. If you send him the datalogs he should be able to make you happy.
Just my .02

 

Another vote for TTS. It is a very good product IMHO....

 

Take you car to a dyno with a WB and do a baseline pull. Send your Dyno AFR vs RPM chart to PCMfor less and he should be able to change your PE table to hit 13.0 AFR right on the button.

Steve

 

Thanks, that's even cheaper...

 

what is burning chip? What is flashing chip?