ECOtec CAMSHAFT INFO SHEET
10-31-2010, 11:25 PM
#51
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An update, although a small one. I got the camshaft. So now I have to wait until I have at least half a day to install it. It came with the variable cam actuator and sprocket attached. I have no intention of using it so I will swap mine to it, I can do that after I'm done working tomorrow.
I think I may need some help crunching numbers to dial the tune in. I DO NOT HAVE AVAILABILITY OF A DYNO. So mostly I'll be looking at peak air loads and pressures to see what the difference is. Gonna be a guestimate at best.
Also while I'm in there I'm taking the lifters out to do a spring swap.
I think I may need some help crunching numbers to dial the tune in. I DO NOT HAVE AVAILABILITY OF A DYNO. So mostly I'll be looking at peak air loads and pressures to see what the difference is. Gonna be a guestimate at best.
Also while I'm in there I'm taking the lifters out to do a spring swap.
11-01-2010, 07:58 PM
#54
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yes I do, but it was this summer when it was hot as **** out. I live where it gets high nineties well into the night with high humidity.
12.88 110.11
I'll tell you what, since it will be a cool weekend let me see what I can run at SCR on Saturday, then the following weekend after I've had a week to dial in a tune I'll repeat the test, that's about the best I can do with time constraints.
12.88 110.11
I'll tell you what, since it will be a cool weekend let me see what I can run at SCR on Saturday, then the following weekend after I've had a week to dial in a tune I'll repeat the test, that's about the best I can do with time constraints.
11-01-2010, 09:00 PM
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yes I do, but it was this summer when it was hot as **** out. I live where it gets high nineties well into the night with high humidity.
12.88 110.11
I'll tell you what, since it will be a cool weekend let me see what I can run at SCR on Saturday, then the following weekend after I've had a week to dial in a tune I'll repeat the test, that's about the best I can do with time constraints.
12.88 110.11
I'll tell you what, since it will be a cool weekend let me see what I can run at SCR on Saturday, then the following weekend after I've had a week to dial in a tune I'll repeat the test, that's about the best I can do with time constraints.
03-03-2011, 10:11 PM
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camshaft
ECOtec CAMSHAFT INFO SHEET
This sheet provides basic information regarding production camshafts used in the ECOtec engines listed
below. This information is accurate as of November, 2006. GM reserves the right to change
specifications and part numbers without notice.
Note: ECOtec Engine codes refer to the following
L61 - 2.2L, used in Saturn ION & VUE; Chevy Cobalt & HHR, Pontiac G5
LE5 - 2.4L, used in Saturn ION & Sky, Chevy Cobalt SS & HHR, Pontiac G5 GT, G6, & Solstice
LSJ - 2.0L supercharged, used in Saturn ION Redline, Chevy Cobalt SS Supercharged
LNF- 2.0L turbocharged, used in Pontiac Solstice GXP, Saturn Sky Redline
Production ECOtec Camshaft Specifications:
INTAKE Cam Valve Valve Duration Valve area
Part Peak Lift Peak Lift Timing @1mm lash @1mm lash
12587985 - LSJ 5.9557 10.03790354 100 196.50 1117.70
12590699 - ’07 L61 5.9804 10.07953361 116 198.40 1112.90
12578511 - LE5 6.2551 10.54252068 135 210.30 1253.30
12589335 - LNF 6.111207 10.29999939 126 203.60 1171.30
EXHAUST Cam Valve Valve Duration Valve area
Part Peak Lift Peak Lift Timing @1mm lash @1mm lash
12584363 - LSJ 5.9543 10.04392819 -115 191.70 1076.40
12590700 - ’07 L61 5.9752 10.07918306 -108 193.30 1078.00
12578512 - LE5 5.95143 10.03908697 -125 195.40 1092.70
12589340 - LNF 6.106106 10.30000003 -120 194.00 1106.00
Notes regarding camshaft interchangeability:
�� The L61 (2.2L ECOtec) camshaft changed for the 2007 model year. This change was to go to a less
aggressive cam profile with less noise, less jerk, less impact load, and better valve dynamics.
�� The 2007 L61 intake cam cannot interchange with any other production ECOtec cam.
�� The 2007 L61 exhaust cam is interchangeable with the ‘06 L61 and the LSJ exhaust cams.
�� The 2006 L61 intake and LSJ intake and exhaust cams are the same casting. However, the LSJ cam
sensor is driven with a hex bushing pressed into the rear of the exhaust cam. In order to operate
properly, the production LSJ cam sensor requires a cam which has a hex bushing pressed into the
exhaust camshaft with the exact orientation in angularity to the cam.
�� The 2006 L61 cams and LSJ cams are the same profiles at different timings. The 2006MY L61
timings are 116 intake, -103 exhaust. The LSJ timings are 100 intake, -115 exhaust.
�� The LNF and LE5 exhaust cams could interchange. The LNF and LE5 cams are not interchangeable
in any other way or with any other ECOtec cams.
Valve springs are the same across all variants, and should be upgraded for high-rpm operation or
increased lift.
The GM Performance Parts ECOtec cam set (88958648 set or 88958636/7 individually) are aggressive
race cams, not stock-replacement cams. They require upgraded valve springs and retainers. These
cams were designed for a race motor, using the ‘06 L61 as the starting point. The cams will not fit the
2.4L LE5 head and will not work with the stock ECM or lifters. They physically fit the 2.0L LSJ head, but
the vacuum pump / cam sensor will not work in a regular production engine.
This sheet provides basic information regarding production camshafts used in the ECOtec engines listed
below. This information is accurate as of November, 2006. GM reserves the right to change
specifications and part numbers without notice.
Note: ECOtec Engine codes refer to the following
L61 - 2.2L, used in Saturn ION & VUE; Chevy Cobalt & HHR, Pontiac G5
LE5 - 2.4L, used in Saturn ION & Sky, Chevy Cobalt SS & HHR, Pontiac G5 GT, G6, & Solstice
LSJ - 2.0L supercharged, used in Saturn ION Redline, Chevy Cobalt SS Supercharged
LNF- 2.0L turbocharged, used in Pontiac Solstice GXP, Saturn Sky Redline
Production ECOtec Camshaft Specifications:
INTAKE Cam Valve Valve Duration Valve area
Part Peak Lift Peak Lift Timing @1mm lash @1mm lash
12587985 - LSJ 5.9557 10.03790354 100 196.50 1117.70
12590699 - ’07 L61 5.9804 10.07953361 116 198.40 1112.90
12578511 - LE5 6.2551 10.54252068 135 210.30 1253.30
12589335 - LNF 6.111207 10.29999939 126 203.60 1171.30
EXHAUST Cam Valve Valve Duration Valve area
Part Peak Lift Peak Lift Timing @1mm lash @1mm lash
12584363 - LSJ 5.9543 10.04392819 -115 191.70 1076.40
12590700 - ’07 L61 5.9752 10.07918306 -108 193.30 1078.00
12578512 - LE5 5.95143 10.03908697 -125 195.40 1092.70
12589340 - LNF 6.106106 10.30000003 -120 194.00 1106.00
Notes regarding camshaft interchangeability:
�� The L61 (2.2L ECOtec) camshaft changed for the 2007 model year. This change was to go to a less
aggressive cam profile with less noise, less jerk, less impact load, and better valve dynamics.
�� The 2007 L61 intake cam cannot interchange with any other production ECOtec cam.
�� The 2007 L61 exhaust cam is interchangeable with the ‘06 L61 and the LSJ exhaust cams.
�� The 2006 L61 intake and LSJ intake and exhaust cams are the same casting. However, the LSJ cam
sensor is driven with a hex bushing pressed into the rear of the exhaust cam. In order to operate
properly, the production LSJ cam sensor requires a cam which has a hex bushing pressed into the
exhaust camshaft with the exact orientation in angularity to the cam.
�� The 2006 L61 cams and LSJ cams are the same profiles at different timings. The 2006MY L61
timings are 116 intake, -103 exhaust. The LSJ timings are 100 intake, -115 exhaust.
�� The LNF and LE5 exhaust cams could interchange. The LNF and LE5 cams are not interchangeable
in any other way or with any other ECOtec cams.
Valve springs are the same across all variants, and should be upgraded for high-rpm operation or
increased lift.
The GM Performance Parts ECOtec cam set (88958648 set or 88958636/7 individually) are aggressive
race cams, not stock-replacement cams. They require upgraded valve springs and retainers. These
cams were designed for a race motor, using the ‘06 L61 as the starting point. The cams will not fit the
2.4L LE5 head and will not work with the stock ECM or lifters. They physically fit the 2.0L LSJ head, but
the vacuum pump / cam sensor will not work in a regular production engine.
03-03-2011, 10:25 PM
#59
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I forgot all about this thread, glad it was ressurected, yes I have some info.
I made only SLIGHT changes to the tune, I really didn't need to tune it at all. It did add power, I lost a little 2800-3500 if it really matters, but the gain was solid above 5500, I did not improve the ET due to weather conditions and track prep but I clicked off 111.5 and 112 mph respectively. On the street the only thing I can judge for sure is I no longer have that fall on it's face after 5500 rpm, it builds a little faster and holds it better throughout. No change to the idle, no change to cruise vacuum, nothing observable in air load or changes to mileage, just gains in high end power, probably a slight decrease in lower end torque not that anything there is really usable.
From the best estimates of performance, purely from the aeroforce gauges, which I did multiple runs both before and after I gained less than a tenth, improved my 0-60 by almost a tenth and gained a full mph at least. Not bad for a 65 dollar upgrade. I managed to score it from the junkyard for dirt cheap, part of the cost was in assembly lube, a valvecover gasket and loctite.
I'd fully expect to see a 7whp gain, slight loss of torque, but a higher torque output curve above 3800. Everything I feel would confirm that. Post mod I cannot produce a dyno result and call it an after mod result since I never did a before mod. If you can find the cam, have a timing set tool that locks the chain and gears into place and are creative enough to remove the cam from the phaser without removing the entire cam, then by all means, THIS is something to do with your afternoon.
I also feel that if someone was running an upgraded turbo, or a higher pressure than me (22.5) they would see much better gains. My gains are primarily from intake, dp, w/m and tune.
I'll also say porting of the TB and intake mani felt almost exactly the same as this mod with the exception the hog job of the mani and smoothing of the tb increased the entire rpm range and REDUCED my psi a little bit because of dal settings.
I made only SLIGHT changes to the tune, I really didn't need to tune it at all. It did add power, I lost a little 2800-3500 if it really matters, but the gain was solid above 5500, I did not improve the ET due to weather conditions and track prep but I clicked off 111.5 and 112 mph respectively. On the street the only thing I can judge for sure is I no longer have that fall on it's face after 5500 rpm, it builds a little faster and holds it better throughout. No change to the idle, no change to cruise vacuum, nothing observable in air load or changes to mileage, just gains in high end power, probably a slight decrease in lower end torque not that anything there is really usable.
From the best estimates of performance, purely from the aeroforce gauges, which I did multiple runs both before and after I gained less than a tenth, improved my 0-60 by almost a tenth and gained a full mph at least. Not bad for a 65 dollar upgrade. I managed to score it from the junkyard for dirt cheap, part of the cost was in assembly lube, a valvecover gasket and loctite.
I'd fully expect to see a 7whp gain, slight loss of torque, but a higher torque output curve above 3800. Everything I feel would confirm that. Post mod I cannot produce a dyno result and call it an after mod result since I never did a before mod. If you can find the cam, have a timing set tool that locks the chain and gears into place and are creative enough to remove the cam from the phaser without removing the entire cam, then by all means, THIS is something to do with your afternoon.
I also feel that if someone was running an upgraded turbo, or a higher pressure than me (22.5) they would see much better gains. My gains are primarily from intake, dp, w/m and tune.
I'll also say porting of the TB and intake mani felt almost exactly the same as this mod with the exception the hog job of the mani and smoothing of the tb increased the entire rpm range and REDUCED my psi a little bit because of dal settings.
Last edited by army_greywolf; 03-03-2011 at 10:37 PM.
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