2000Firehawk

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.

FiscalFizz

ok.. thanks.... (has no idea what any of the above means)

celicacavy

Found this in the bowls of the forum, just wondering if we really can use a intake cam?

08ShowbaltLS

if the 07+ L61 cam has a less aggressive profile does that make it have less power than the pre-07 L61?

blackvette101

thats not so bad for a 4 banger. who is going to be the first to throw an LE5 exhaust cam in there for a 2 hp gain lol

army_greywolf

iTrader: (2)

Probably me. but with that kind of increased lift, it'll prolly be a 7 to 11 hp gain. I even know where a 2.4 LE5 motor with a busted block is.

blackvette101

maybe im having trouble reading it doesn't it say that LE5 has 10.039mm of lift and 195.4 duration and LNF has 10.3mm of lift and 194 duration.

celicacavy

Your looking at the exhaust, I'm looking at the le5 intake with a lnf exhaust

cardelino18

iTrader: (3)

soooo we can get an aftermarket exhaust cam for the LNF?

slowbalt84

Does this mean the jbody performance triflow cams for the 2.4 le5 will fit?

cardelino18

iTrader: (3)

only the exhaust side i guess...

blackvette101

it won't fit only the exhaust cams are interchangeable. intake side has the fuel pump

cardelino18

iTrader: (3)

ok so if you get an aftermarket exhaust cam from the LE5 will the LNF gain some power from it with a tune may b?

blackvette101

Im sure it would as long as there is not too much overlap but the question is if it would be worth the money. I know ZZP said they were going to be testing cams of there own next. If your already in the head though you might as well go for it and let us know how it works

cardelino18

iTrader: (3)

well i want to see all the variables of that cam before eather making my head better or making it worst lol...

i found this from J Body Performance they have a set of cams from the LE5 and this is the exhaust cam spec:
PRIMARY EXHAUST
ADV
256* 417L
@.050
202*

blackvette101

by my calculations thats 10.425mm of lift so thats an increase of 0.125mm lift and 8 more degrees of duration. that's not bad at all i could see a solid 10 whp gain maybe more. definatly an improvement but its kind of mild i'd like to see something in the mid to high 21x or something in the 22x duration for us big turbo guys.

army_greywolf

iTrader: (2)

the intake on the LNF is about as good as it CAN be for a turbo motor, it has a bit of overlap good lift and a really long duration (and the variable timing really helps the engine get the air) but having an extra bit of duration and lift in the exhaust can help the turbo out, which recycles that effort and makes more horsepower (more than an N/A motor would with the same mod).

cardelino18

iTrader: (3)

i mean with a good tune you could probably push 10-20whp on that cam... but would it be a direct replacement?

army_greywolf

iTrader: (2)

It looks like it, I'm gonna go back to the yard Monday and finish snatching it up.

blackvette101

honestly the Intake is good on the LNF but it's not as good as it can be. Will see from ZZP's testing but by looking at other turbocharged 4 cylinders most can handle a low 20x intake on stock turbo most of which are smaller than the k04. and big turbo 4 bangers usually run in the 21x to 22x range

blackvette101

based on the information given it looks like it. you can probably push that much out of an exhaust cam exhange. I don't think the k04 guys would though

cardelino18

iTrader: (3)

i will see if i can talk to JBP to see if the would only sell me the exhaust cam... if they do i would try this mod when i install my valve springs... its somethign that everyone over looked since 06 thats when this article came out...

army_greywolf

iTrader: (2)

I'm referring to factory drivability vs. power. I mean we all realize that going with ZZP cams in the future we can expect some reduction in fuel mileage and out of boost drivability? The engine doesn't have enough compression to make real use of an aggressive camshaft IN VACUUM, now that doesn't mean there won't be sharp increases in power it just means your changing where you will find that power. It also means you will make more power at less boost which is good for those of us on the factory turbocharger.

blackvette101

nice let us know the results

cardelino18

iTrader: (3)

i just emailed JBP to see if they would just sell the exhaust cam... i guess ill have an answer by monday...