Wasn't sure where to post this, but wanted to give a huge shout out to Sr5guy on helping with my build. So I figured, why not his tuning thread to show what he has accomplished!?
Build Specs:
91 Legend 5mt
RL C35 swap
SPEC 3+ clutch
Socketed stock ECU
Moates Ostrich Emulator
Soldered 4 pin header for tx/rx
TunerPro RT software
Vortech V5 (f-trim)
CX Racing W2A cooler
Innovate MTX-L wbo2
AEM 5 bar map
MFactory LSD
Timing Adjuster delete
RDX Injectors (resistor delete)
Dimpled stock fpr, I think it's at 50ish psi? (AEM one sprung a leak on me)
S2K electronic power steering
Walbro 255 fuel pump
93 pump gas
Anyway back to Sr5guy. I socketed and installed the Moates onto the ecu, soldered on a 4 pin header to a later model obd1 ecu (earlier models didn't have the header spot). Almost did it correctly myself, but he had to fix a broken connection from my overheating the board. Lol
As stated previously we had to use the 5bar map because of the voltage restriction built into the ecu. So a little testing to find out the MAP and AEM voltage line variance (multiplier).
To get datalogging he made some magic that I cannot explain. But we spliced in the MTX-L wbo2 into the timing Adjuster port in the ecu and just deleted the timing Adjuster altogether. If he wants to explain it he can.
Everything was stock except for the supercharger, and map sensor at this point. Fuel injectors and clutch weren't upgraded to see what the stock system could handle.
The first road tune session was a success. We were able to get the MAP sensor to read correctly (or close enough). Datalogging was working like a charm. Here's a quick vid of the day after the first tuning session.
https://youtu.be/it5PG7MMIv4
We quickly found out that the stock Injectors were not going to be enough for anything above 5psi (to be expected). And my old clutch just didn't have it in it, heh. So I put her back on stands and went to work.
RDX Injectors installed, FPR increased, resistor box deleted, and spec 2+ clutch.
On the next trip down we were able to dial in a safe tune with retarded timing. Zero knocks in the full map range. Running 14.8-15 AFR from idle to part throttle, 12.1 AFR in full throttle. Was cut a little short due to weather and me being called into work, but that's life. Was definitely impressed with his attention to detail and ability to troubleshoot on the fly. More impressed with his ability to deal with my ADD, lol. I still am running the same tune until I become more familiar with the timing tables as that is my next move. Definitely room for improvement, but until I get more miles under it and a few small things knocked out, it is still a blast.
The next weekend I came across a traveling mustang dyno in town for a local classic cruise/show. I still had clutch slip with the Spec 2+. Also had 190*+ intake temps. 5k rev limiter because it was all still fresh to me.
https://youtu.be/8jIRxPBuhC4
276.5whp/266.4wtq on a dynamometer. Which run 12-15% lower than dynojet. I was ecstatic. My original goal of 320whp on the little V5 seemed definitely attainable.
Since then I've added a 3+ clutch that finally doesn't slip. Increased rev limiter to 6500. Introduced a BOV to the atmosphere since we don't use a MAF. Installed a CXRacing water intercooler with small reservoir for now. Prototype MFactory helical LSD (first non clutch LSD for Legend ever). 235 Gmax tires (really need to invest in some legit tires next season). The next step is to go a plug colder than stock, and dial in the timing. I think with those additions 320 should be easy on the C35.
Anyway, enough about the specific build. I wish I could speak the same language as Sr5guy when it comes to the tuning capability. What I wanted to show is that he was able to do it, and it all seems to be working out rather well. Both Tuning and Datalogging were achieved on a stock ecu [emoji106][emoji106][emoji106]. Great job man, excellent work!
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