Greetings,
I finally got the time to get some serious scans with my mods.
This is a 98 C5 rag top A4 with a 2:73 rear end. Mods include, LG long tubes with 3" random techs and X pipe into a Corsa Indy system. Modified MAF (removed screen, Halltech ends, removed un-necessary plastic) Halltech snorkle (early style) 176 high flow thermo. LS6 intake manifold. No changes to the computer yet. Plugs are Iridiums and been in a while, MSD wires. Running the rear O2s in the headers, used sims in the rear position (per LG instructions).
I was impressed with the SOP of the first run, I rolled in easy up to 35 MPH as she will fry the tires at anything less, still got moderate wheel spin, but not enough to trip the TC. Flat footed it and manual shifted at 5900, traction control came on as she tried to bust them loose again! Not bad. I think it could do better.
Reading the charts here is my first impression.
1. LFTs are high at 18 - 19.5 at WOT
2. INJs duty cycle seems high in mid-high 17ms even an 18 (these are the larger INJs offered in 98.)
3. MAP seems low and drifty running 98 to 101
4. MAF seems to be working right.
5. Fuel Trim cell is a constant 22 ? don't know what this means?
I do have a run where she threw some KRs, but I believe that they are false. As sometimes they happen and sometimes not, so I got to go looking for something hitting or rattling, AC was on so it could be that.
Thank you in advance. I think if I can get the LTFs lined up she should be pretty close. All in all for a 98 with 125K miles and a 2:73 she is strong!
Below is the spread sheet form this run.
Can I get some expert opnion on what you think? And where I should start. Where would you start?
For the run below, I reset the Fuel trims then drove for 50 to 70 miles and then did several lead up runs then the one below.