EllowViper
Enthusiast
I was doing some more diagnostics regarding the issue with my recent #5 lbs ROE install and the popping/missing going from vacuum to mild/heavy boost and the significant backfiring on decell. Currently have the basic ROE 6C and 9C smart card programs. I know there is a chronic issue with ROE motors regarding tuning cylinder’s 9/10 and the issue of poor low RPM running due to the “short” intake runner design under vacuum. So there is a variety of issue to work through with tuning this engine. I know owners have posted that their ROE cars run better than “stock”, but I’m not there with the basic ROE tune provided. No luck on the forum search so here we go again. Sean wanted me to check for potential vacuum leaks so I pulled mine down last night. Everything looked OK from a mechanical install perspective. Bypass valve holds vacuum just fine. I did put my 02 sensor extensions on and moved both sides to the collector vice the single tubes on each side (Bellanger Headers). Checked all plugs/wires. Plugs #9 and #10 were BLACK and SOOTY. All the others were fine, if not running a bit too cool IMO (but I haven't done much WOT running since it runs so poorly and I don’t want to push my creampuff too hard with the current tuning issue). When I did a run today with the 02’s in their new position in the collectors (95 degrees and high humidity), the car now pings really bad under mild acceleration (didn’t before with the 9C card and the 02 sensors in the single header tube) and I’m fearful to really get into WOT since I have to get through closed loop first…and I don’t’ think my tune will get me there. So, now that cylinders 9 and 10 are feeding the overall 02 readings on each bank in closed loop, me thinks the ECU is compensating by leaning out all injectors to the point that now I’m pinging under mild closed loop acceleration. I really need an A/F sensor in each header tube!! Still not throwing any codes, but it looks like the time has come to get the ROE tuning software, A/F sensor, and start data logging. It was a simpler life as a N/A stocker. Anyone running a better tune on a basic ROE 5 lbs set-up than the ones Sean provide?? If so, what were the basic changes from the ROE cards since they seem to think they should be pretty close to achieving good drivability out of the box? I've looked at Damn Yankee's tuning videos... so addressing each cylinder's specific tuning criteria is achievable with the VEC, just curious if anyone's been down this road before.