quato
Well-known member
Hey folks, I have been going through the break-in of my new engine and also doing a bit of tuning as well. I used the maps from my 2.0 engine but now that I'm 2.4 I'm hitting completely different cells as could be expected. Since the engine is brand new, I'm worried about hurting the engine by going too far.
A brief history of the car. When I bought it, it ran flawlessly and was able to run about 20-22 degrees of peak timing advance. Then it eventually developed a miss like there was a boost leak somewhere. I did a boost leak test and had air coming out of the crankcase, so no bueno but ok since I know it was an untouched engine before and may or may not have had some hard miles. Now the engine is rebuilt with a G64B bottom end (I'll list pertinent details below), pretty much fully built and it's loving any timing I can throw at it. I'm running about 12.5-13.5psi and about 20degrees of advance with not a hint of knock anywhere.
I do know that it's possible to advance too much and possibly hurt the engine (usually with E85 or race gas) but I want to stay within a safe limit. I don't have access to a dyno so I am doing this slowly back and forth to work datalogging and reviewing and tuning, rinse and repeat. After everything is fully broken in, I'll go on up to ~22psi and retune from there.
Ok now my specifics:
G64B Block .020 over
No balance shafts
Kiggly girdle (overkill for my application but hey, I already had the engine open...why not haha)
Manley H-Beam rods
Manley 8.5:1 pistons
ARP hardware throughout
New head
HKS 272's in/exh
New valves
Supertech springs
Fel-Pro Permatorque head gasket
Fidanza flywheel
Southbend "stage 3" clutch
Things I forgot to include when I first posted:
Aeromotive A1000 external pump
Braided line to Aeromotive FPR and back to fuel cell (came with car)
FIC 1050 injectors
Evo8 ECU
Evo8 MAF
Apexi solenoid for electronic boost control
Evo8 3bar MAP
3" exhaust
Tial 38mm wastegate
3" deep spearco intercooler with 2.5" piping
LC-1 wideband
running 93 octane for now but will tune to e85 to use with map switching
Thanks for any input or advice /ubbthreads/images/graemlins/worthy.gif
A brief history of the car. When I bought it, it ran flawlessly and was able to run about 20-22 degrees of peak timing advance. Then it eventually developed a miss like there was a boost leak somewhere. I did a boost leak test and had air coming out of the crankcase, so no bueno but ok since I know it was an untouched engine before and may or may not have had some hard miles. Now the engine is rebuilt with a G64B bottom end (I'll list pertinent details below), pretty much fully built and it's loving any timing I can throw at it. I'm running about 12.5-13.5psi and about 20degrees of advance with not a hint of knock anywhere.
I do know that it's possible to advance too much and possibly hurt the engine (usually with E85 or race gas) but I want to stay within a safe limit. I don't have access to a dyno so I am doing this slowly back and forth to work datalogging and reviewing and tuning, rinse and repeat. After everything is fully broken in, I'll go on up to ~22psi and retune from there.
Ok now my specifics:
G64B Block .020 over
No balance shafts
Kiggly girdle (overkill for my application but hey, I already had the engine open...why not haha)
Manley H-Beam rods
Manley 8.5:1 pistons
ARP hardware throughout
New head
HKS 272's in/exh
New valves
Supertech springs
Fel-Pro Permatorque head gasket
Fidanza flywheel
Southbend "stage 3" clutch
Things I forgot to include when I first posted:
Aeromotive A1000 external pump
Braided line to Aeromotive FPR and back to fuel cell (came with car)
FIC 1050 injectors
Evo8 ECU
Evo8 MAF
Apexi solenoid for electronic boost control
Evo8 3bar MAP
3" exhaust
Tial 38mm wastegate
3" deep spearco intercooler with 2.5" piping
LC-1 wideband
running 93 octane for now but will tune to e85 to use with map switching
Thanks for any input or advice /ubbthreads/images/graemlins/worthy.gif
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