230/236 107.1lsa 107.1icl cam is in!!!
12-29-2003, 09:41 AM
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230/236 107.1lsa 107.1icl cam is in!!! Man, this thing is going to shake the car apart. Honestly though, the idle is not that bad at 1000 rpm. It actually doesn't want to cut out as much as my old 224 110lsa cam. Having ls1 edit with a stick like this though is mandatory.
I have two concerns however. I have a p0101 and a p1153. These codes represent a Mass Air Flow System Performance error and a Oxygen Sensor Infrequent Switching respectively. The car stumbles when this code comes on with a SES light. Is this something that can be solved with ls1 edit or is this just a byproduct of a cam with this much overlap on a closed loop run ls1, it only happens while cruzing. Or is it because of the infrequent switching of my o2 sensor which I believe is bank 1 (by the way which side is what bank, ie bank 1 is driver side).
My ltrms are in line so I am not having any problems there. The car runs real strong at wot, deffinately pulls harder everywhere above 3500 compared to my old cam, and I think it will only progress with some more miles. I noticed the ltrms adjusting while I did some ataping just cruzing around. Sooner then later, I would like to schedule some dyno time to get an actualy a/f reading and tune it.
Where is the closest place to get dynoes to the eastern shore, Heffner's
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01 Pewter Hurst M6 (I'm not 70 yet, ha ha) SS #1215
SLP Options: Chrome 10 Spoke Wheels, Dual Dual, SS Grill
My Options: Wheels: 17x9.5 17x11 zr1 replicas with nitto 555 fronts and 555 extreme drags
Mods: Every bolton plus a thumpn' 224/224 565/565 106icl 110lsa comp xe cam
Wheels: ZR1s with nittos (315 in the back)
Dyno: uncorrected rwhp/rwtq, 415/417, corrected 405/406
Moser 12bolt, 33 spline, eaton posi, 4.11s
230/236 108lsa 108icl Cam on the Way
I have two concerns however. I have a p0101 and a p1153. These codes represent a Mass Air Flow System Performance error and a Oxygen Sensor Infrequent Switching respectively. The car stumbles when this code comes on with a SES light. Is this something that can be solved with ls1 edit or is this just a byproduct of a cam with this much overlap on a closed loop run ls1, it only happens while cruzing. Or is it because of the infrequent switching of my o2 sensor which I believe is bank 1 (by the way which side is what bank, ie bank 1 is driver side).
My ltrms are in line so I am not having any problems there. The car runs real strong at wot, deffinately pulls harder everywhere above 3500 compared to my old cam, and I think it will only progress with some more miles. I noticed the ltrms adjusting while I did some ataping just cruzing around. Sooner then later, I would like to schedule some dyno time to get an actualy a/f reading and tune it.
Where is the closest place to get dynoes to the eastern shore, Heffner's
__________________
01 Pewter Hurst M6 (I'm not 70 yet, ha ha) SS #1215
SLP Options: Chrome 10 Spoke Wheels, Dual Dual, SS Grill
My Options: Wheels: 17x9.5 17x11 zr1 replicas with nitto 555 fronts and 555 extreme drags
Mods: Every bolton plus a thumpn' 224/224 565/565 106icl 110lsa comp xe cam
Wheels: ZR1s with nittos (315 in the back)
Dyno: uncorrected rwhp/rwtq, 415/417, corrected 405/406
Moser 12bolt, 33 spline, eaton posi, 4.11s
230/236 108lsa 108icl Cam on the Way
12-29-2003, 10:12 AM
#3
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Nope, no sound or vids. Just imagine being able to look at the back of the car and seeing it shake back and forth with the antenna really shaking alot.
12-29-2003, 10:21 AM
#4
You are going to have to get some serious tuning done with that big of a cam.
Both the O2 insufficient switching, and the MAF performance codes are being thrown by the cam.
FYI, your LTerms are going to be basically useless with that much overlap.
We specialize in big cam tuning
Both the O2 insufficient switching, and the MAF performance codes are being thrown by the cam.
FYI, your LTerms are going to be basically useless with that much overlap.
We specialize in big cam tuning
12-29-2003, 10:30 AM
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Hey Kevin, do you think I could give ya a call. Don't get me wrong, the cam runs fairly smooth. Only every now and then does it stumble when I'm cruzing.
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12-29-2003, 10:34 AM
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for the P0121 code you have to go into ls1 edit v1.3 and goto the "engine diagnostic" tab and you will see at the bottom P0121 Parameters, right now its 55/65, change it to 75/85
12-29-2003, 10:49 AM
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The insufficient switching code will go away when you replace a sensor, I have done it before. I don't have a p0121 code, I have a p0101 code.
12-29-2003, 12:47 PM
#15
P0101, P0121, P0106, all can be set from a large cam.
The system performance codes rely on each one of the separate systems monitoring the proper operation of the other. The MAP sensor looks after the MAF, the MAF looks after the TPS, and the TPS looks after the MAP.
Large cams cause the vacuum in the manifold to drop below design conditions. This reduction in vacuum pressure (seen especially on startup), throws the system monitoring of the MAF/MAP/TPS out of whack. As a result, it isn't uncommon to throw one or all of the above 3 system codes with large cams.
Setting the fail limit of the code isn't going to solve all of the problems. This is only helpful for Grand Am cams, or other cams too large to generate a helpful vacuum in the intake. Additional tuning needs to be made to the Volumetric Efficiency tables (those tables that the MAP uses to monitor the MAF) in order to get the car to run properly.
Excessively large cams generate a fair amount of reversion (your intake and exhaust gasses reverse direction momentarily). This reversion causes all kinds of problems with oxygen sensors and MAF's. As a result, it isn't uncommon to throw an insufficient switching code from the O2's. Especially, if it is a 'slow' O2 to begin with.
Good Luck
The system performance codes rely on each one of the separate systems monitoring the proper operation of the other. The MAP sensor looks after the MAF, the MAF looks after the TPS, and the TPS looks after the MAP.
Large cams cause the vacuum in the manifold to drop below design conditions. This reduction in vacuum pressure (seen especially on startup), throws the system monitoring of the MAF/MAP/TPS out of whack. As a result, it isn't uncommon to throw one or all of the above 3 system codes with large cams.
Setting the fail limit of the code isn't going to solve all of the problems. This is only helpful for Grand Am cams, or other cams too large to generate a helpful vacuum in the intake. Additional tuning needs to be made to the Volumetric Efficiency tables (those tables that the MAP uses to monitor the MAF) in order to get the car to run properly.
Excessively large cams generate a fair amount of reversion (your intake and exhaust gasses reverse direction momentarily). This reversion causes all kinds of problems with oxygen sensors and MAF's. As a result, it isn't uncommon to throw an insufficient switching code from the O2's. Especially, if it is a 'slow' O2 to begin with.
Good Luck
12-29-2003, 01:23 PM
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So your saying that my o2s are probably not bad then. I watched both with autotap and they seem be switching alot slower then they used to with the old 224 110lsa cam.
12-29-2003, 02:43 PM
#17
More than likely you just need a good tune.I would suggest you do it ASAP since big Cams like dumping bigtime fuel without special tuning(ie possible cylinder washing)I've tuned Cam's bigger than that with great result's.Ussually idle is set to 900rpm and idle with little lope.
Definitly go to someone that has big cam tuning experience since the tune is more indepth to get running real good at lower rpm ranges.
Definitly go to someone that has big cam tuning experience since the tune is more indepth to get running real good at lower rpm ranges.
12-29-2003, 03:41 PM
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I only need help for the slight stumble that occurs around 2300 rpm very infrequently. I have already tuned for hot and cold start ups with my old 224 110lsa cam and only need to tweak these tables slightly. I do have ls1 edit. Thanks for all the suggestions guys.
