Hey all, first post
I swapped an E40 LS2 into my 71 Chevelle and was able to get it running without much pain. The engine idles smooth and will rev thru the RPM range in Park/Neutral but has its struggles under load. There are no internal mods and the only changes from stock where ditching the vette manifolds for LS3 Camaro units. The factory MAF was reused with custom plumbing.
Under very light throttle, in gear, the engine runs well however with anything more than very light throttle (don't think i've been above half throttle in gear yet) the engine bogs down badly and does not want to rev above 2000 rpm or so. In the attached log, the 2 instances where I got the engine near 2000 rpm in gear, it shakes so bad, not wanting to continue to rev, that i back off the throttle versus trying to accelerate thru it.
I really could use some guidance to get me at least on the right track in trying to diagnose/correct the problem.
Attached is the current tune and a log from my last test drive. Below is some other background detail on my setup.
As far as the tune goes, I am very much so a rookie and have limited changes in HP Tuners to items such as: VATS, Fans, Fuel Pump settings, disabling DTCs, turning off rear O2s and disabling options under Traction Control.
Should I even have the expectation that i could swap the stock motor in and without modifying anything that the car would run reasonably well without the need to tune until performance mods are made?
Background on my swap:
*Donor was a wrecked 2005 Automatic Corvette LS2 with 20k miles
*Used 2010 Camaro exhaust manifolds with the Corvette upstream O2 sensors
*Custom Air Intake plumbing with the stock corvette MAF
*TH350 transmission with 2500 stall
*3.73 rear gears
*Aeromotive 340 in tank pump
*Bypass regulator under hood set to 58PSI (verified at OEM fuel rail at idle) Vacuum port on regulator not used and left open to atmosphere to maintain constant 58 psi
*System voltage (read by ECM) never dips below 13V