Quote:
L61(2.2L)
140hp 150tq
86mm bore x 94.6mm stroke
the engine that started it all. first introduced to the Jbody in model year 2002 as the LS sport engine along side the 2200 OHV and 2.4 LD9. By the 2003 model year, it was the only powerplant available for the Jbody up until the end of production in summer of 2005.
-in the Jbody, the L61 comes with either the 4t40e or the getrag F23-M86 5 speed transmission.
-the L61 in the jbody has a 7 tooth reluctor wheel. the reluctor wheel is a cast section of the crankshaft that tells the ecu when to fire the ignition. This cannot be removed, swapped, or otherwise changed.
!!!THIS IS VERY IMPORTANT IF YOU PLAN ON RETAINING THE FACTORY ECU FOR ENGINE MANAGEMENT!!!
-rods and pistons are not known for strength, especially under boosted applications. Forged rods and pistons are not required, however encouraged (especially for turbo)
tidbits:
*the lsj supercharger and manifold is an ALMOST direct bolt-on for the L61. an adapter bracket for the throttle body and a part of the block by the pullies needs to be shaved down in order for it to be bolted on.
*all exhaust manifolds will physically fit on all ecotecs... however due to differing models' constructions, downpipes may be incompatible.
*the L61 in the Jbody has a return fuel injection system. All newer L61s as well as the LE5 and the LSJ use a returnless fuel injection system. the LNF uses a direct-injection system, much like a diesel
*as per GM racing research, the L61 head has a tendency to blow outward of #1 and #4 cylinders at around 500hp. This has yet to be confirmed.
the descendents of the (and including model year 2006 and higher L61 engines) L61 all adapted a "high resolution ignition system" that replaces the 7tooth reluctor with a 58tooth reluctor. this is what makes direct swaps to other ecotec engines impossible for a factory computer.
Quote:
LE5 (2.4L)
170hp 165tq
88mm bore x 99mm stroke
found in cobalt SS (non s/c), solstice, sky, malibu, HHR, and numerous other GM small cars
the big gun of the group, the 2.4 has an 88mm bore and a whopping 99mm stroke. It was also the first ecotec to implement variable valve timing.
tidbits:
-the LE5 has not only larger displacement, but slightly higher compression than the L61 at 10.4:1
-the LE5 (like the other siblings of the L61) comes with strengthened rods and crankshaft
-the LE5 also includes piston cooling oil jets that continously spray the underside of the pistons with oil to help keep them cool, and less prone to detonation.
Quote:
common features across all ecotec engines:
block structure has same girdle construction whereas the crank is sandwiched between two "halves" of the block. the oil pan is structural in construction. engine is all aluminum, and fully dressed is the lightest engines GM has ever produced. Manifolds are all directly interchangeable. Heads are swappable between all blocks, however head design is different between engines, so cam swaps are only possible between the L61 and LSJ. the LE5 is not similar enough to the L61 and LSJ, and the LNF is completely different due to direct injection.
John Higgins wrote:I think this swap can be done, and not be as totally hard as some think (of course I could be wrong as well). You would need to use the ECU from the 2.4, and engine bay wiring. Might have to see about using the BCM from the 2.4 as well. The way I see it is if you can put a GTP motor in a J you can put this motor in as well.
DaFlyinSkwirl (PJ) - BPU++ wrote:not to mention all descendents of the L61 have digital sensors, not analog.. so that may or may not prove to be a problem when hybriding the two
DaFlyinSkwirl (PJ) - BPU++ wrote:if I were you this is what I'd do...
use the 2.4 bottom end with the 2.2 top end. swap over as many sensors from the 2.2 as you can. the oil pan may have to be swapped for the 2.2 pan so it works with the jbody trans. stand alone is the only way around the reluctor ring.. unless you run an MSD setup with an external crank trigger
Quote:
L61(2.2L)
140hp 150tq
86mm bore x 94.6mm stroke
the engine that started it all. first introduced to the Jbody in model year 2002 as the LS sport engine along side the 2200 OHV and 2.4 LD9. By the 2003 model year, it was the only powerplant available for the Jbody up until the end of production in summer of 2005.
-in the Jbody, the L61 comes with either the 4t40e or the getrag F23-M86 5 speed transmission.
-the L61 in the jbody has a 7 tooth reluctor wheel. the reluctor wheel is a cast section of the crankshaft that tells the ecu when to fire the ignition. This cannot be removed, swapped, or otherwise changed.
!!!THIS IS VERY IMPORTANT IF YOU PLAN ON RETAINING THE FACTORY ECU FOR ENGINE MANAGEMENT!!!
-rods and pistons are not known for strength, especially under boosted applications. Forged rods and pistons are not required, however encouraged (especially for turbo)
tidbits:
*the lsj supercharger and manifold is an ALMOST direct bolt-on for the L61. an adapter bracket for the throttle body and a part of the block by the pullies needs to be shaved down in order for it to be bolted on.
*all exhaust manifolds will physically fit on all ecotecs... however due to differing models' constructions, downpipes may be incompatible.
*the L61 in the Jbody has a return fuel injection system. All newer L61s as well as the LE5 and the LSJ use a returnless fuel injection system. the LNF uses a direct-injection system, much like a diesel
*as per GM racing research, the L61 head has a tendency to blow outward of #1 and #4 cylinders at around 500hp. This has yet to be confirmed.
the descendents of the (and including model year 2006 and higher L61 engines) L61 all adapted a "high resolution ignition system" that replaces the 7tooth reluctor with a 58tooth reluctor. this is what makes direct swaps to other ecotec engines impossible for a factory computer.
Quote:
LE5 (2.4L)
170hp 165tq
88mm bore x 99mm stroke
found in cobalt SS (non s/c), solstice, sky, malibu, HHR, and numerous other GM small cars
the big gun of the group, the 2.4 has an 88mm bore and a whopping 99mm stroke. It was also the first ecotec to implement variable valve timing.
tidbits:
-the LE5 has not only larger displacement, but slightly higher compression than the L61 at 10.4:1
-the LE5 (like the other siblings of the L61) comes with strengthened rods and crankshaft
-the LE5 also includes piston cooling oil jets that continously spray the underside of the pistons with oil to help keep them cool, and less prone to detonation.
Quote:
common features across all ecotec engines:
block structure has same girdle construction whereas the crank is sandwiched between two "halves" of the block. the oil pan is structural in construction. engine is all aluminum, and fully dressed is the lightest engines GM has ever produced. Manifolds are all directly interchangeable. Heads are swappable between all blocks, however head design is different between engines, so cam swaps are only possible between the L61 and LSJ. the LE5 is not similar enough to the L61 and LSJ, and the LNF is completely different due to direct injection.
not to mention all descendents of the L61 have digital sensors, not analog.. so that may or may not prove to be a problem when hybriding the two
keep in mind, the 2.4 with its larger bore feeding into a 2.2 combustion chamber will in effect RAISE compression. so 10.4:1 for a stock LE5 will be probably closer to 11:1 with an LE5 bottomend and an L61 head.
be sure to check your piston-to-deck height clearance. if its similar to the L61, valve interference won't be a problem.
but since it has yet to be done, checking valve clearances with whatever cams you may run is more than a good idea.
you also need an LE5 headgasket in order to clear the 88mm bore.
John Higgins wrote:I think this swap can be done, and not be as totally hard as some think (of course I could be wrong as well). You would need to use the ECU from the 2.4, and engine bay wiring. Might have to see about using the BCM from the 2.4 as well. The way I see it is if you can put a GTP motor in a J you can put this motor in as well.
DaFlyinSkwirl (PJ) - BPU++ wrote:Quote:
the engine that started it all. first introduced to the Jbody in model year 2002
how is that an incorrect? re-read the quote...
the engine itself was avaialable earlier, but it wasn't in the jbody until the 2002 M.Y. hence "first introduced to the JBODY"
and the 2002 M.Y. were available in 2001