ZR-1 Net Registry Forums - View Single Post - Tuning larger LT-5 cams

XfireZ51 · 06-13-2011

This past weekend gave me the opportunity to migrate the tune for my motor over to the Blue Turtle. Essentially, Dave's motor is a copy of mine with the ported heads, top end, intake cams, and headers. Some differences are in the details. My heads were done by GVD, and I did my own top end porting 2 years ago. The headers are the Watson 1 7/8" with a MagnaFlow system behind them. With Pete chasing down the mechanical issues, we used my VE and SA tables for Dave's car so Pete could start with a tune that was pretty close to what was needed and save time. One main difference between the tune on Dave's motor and mine is that I am running Closed Loop while Dave's is Open Loop. However, the base VE tables are very similar although I haven't spoken with Pete on the tweaks he did afterwards. Not sure if Pete made any changes to the SA tables I had. However, Pete burned a chip with my VE and SA tables onto the Haibeck calibration, installed it, and the car idled pretty well right off the bat, albeit without the IAC issue resolved (which Pete fixed later). AFR was at about 14.3, the Stoich ratio I have targeted for a 10% ethanol fuel. I'll be interested in seeing where and how much my base and Dave's final calibrations differ.

P.S. Just spoke with Pete. As a point of clarification, Pete tuned the motor in Open Loop but then finalized the calibration by re-enabling Closed Loop. I originally tuned the motor using the BLMs in Closed Loop

06-13-2011	#22
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Tuning the Blue Turtle's larger LT-5 cams This past weekend gave me the opportunity to migrate the tune for my motor over to the Blue Turtle. Essentially, Dave's motor is a copy of mine with the ported heads, top end, intake cams, and headers. Some differences are in the details. My heads were done by GVD, and I did my own top end porting 2 years ago. The headers are the Watson 1 7/8" with a MagnaFlow system behind them. With Pete chasing down the mechanical issues, we used my VE and SA tables for Dave's car so Pete could start with a tune that was pretty close to what was needed and save time. One main difference between the tune on Dave's motor and mine is that I am running Closed Loop while Dave's is Open Loop. However, the base VE tables are very similar although I haven't spoken with Pete on the tweaks he did afterwards. Not sure if Pete made any changes to the SA tables I had. However, Pete burned a chip with my VE and SA tables onto the Haibeck calibration, installed it, and the car idled pretty well right off the bat, albeit without the IAC issue resolved (which Pete fixed later). AFR was at about 14.3, the Stoich ratio I have targeted for a 10% ethanol fuel. I'll be interested in seeing where and how much my base and Dave's final calibrations differ. P.S. Just spoke with Pete. As a point of clarification, Pete tuned the motor in Open Loop but then finalized the calibration by re-enabling Closed Loop. I originally tuned the motor using the BLMs in Closed Loop Last edited by XfireZ51; 06-13-2011 at 01:40 PM.