Do you have a tuner? Self tune?

 

I own hpt, but am going to seek help.

 

Just bought zzp 2.2 axles, full timing kit, lsj dipstick and tube, new coil packs for good measure, flywheel bolts, injector seals, thermo housing gasket, crossover tube orings, water pump gasket, valve covergasket.

I think that's it haha. I'm getting close

 

Could you tell me...how or what are you doing to reattach the end's of those cams....

 

Lucky you have a manual. There are no axle options for auto...

 

Cardone select's are about the best you can do for axles for the auto's, they T6 heat treat the shafts and the CV joints are usually slightly oversized for longevity purposes. Not that that makes them amazing but they will usually withstand a little bit more HP then the stockers. Just because they are built with a lifetime warranty. Mevotech builds oversized wheel bearings as well for our cars.

 

The sensor is press fit, and the exhaust cam just needed to be cut down to factory length. The lsj has an extra journal on the end, while some l61s do not.

The area where the sensor pressed onto the original cam is the same size as all of the journals. So when you trim off the end of the cam that normally drives the lsj cam sensor, you are left with a floating journal. The sensor presses on that journal to the same location as with the factory cam

The few people that have had it done paid 200 plus dollars to have the cam machined down and the sensor pressed on. The only real benefit is a pretty edge. I have a press, so I decided to do it myself

 

But you didn't cut the cam straight and just unbalanced the camshaft. lol You do realize that spins inside the motor right? There is a reason they are cut on a lathe to make a pretty edge.

 

That amount of unbalanced mass is probably negligible. Nothing to worry about. It is very near the center of rotation. If it were added weight on a cam lobe or something it may be something to worry about, but not this.

 

Also are you pressing the sensor onto the one that you cut already?

Your probably right, I was more curious if he was going to attempt to weld the cam back together more then anything.

 

The cams spin at a fraction of the speed of the rotating assembly, and are a relatively small diameter. Have you seen the actual sensor? Its basically a weight hanging off one side of the cam, all else equal to the other cams with no sensor. My cuts will cause zero issues, and I would put money on it. If it were anything else, it would be a different story. As far as the end of the camsshafts, it's fine

The zzp cams have tack welds to hold the hex drive in. Do you think they rebalanced the cam after they reweld? It's negegable.

 

Both cams needed to be cut. The exhaust just needed to be trimmed to fit in the head, and the intake trimmed to fit, and needed the sensor. The lsj cams both extend out of the edge of the head, where neither of the 07-08 l61 cams do

 

I dont want to take my L61 apart to take a look at the sensor, do you have a picture of it?

 

I thought you had a 2.4?

 

I have two cobalt's, 08 and my 06 SS.

 

This is the factory cam with the sensor still on it, and the end of the zzp cam I had cut off

 

You can see how the lsj head has 2 extra journals on the right side of the head that the 07-08 2.2s don't have. I think the earlier heads only had to have one cam trimmed to use lsj cams. I don't remember

 

The LSJ cam on the right im familiar with that sensor pickup, 2.4's have it as well, the one on the left makes no sense to me, where is the cam position sensor located on the head?

 

It's on the front of the head and that wheel spins over it. Lnfs use the same sensors as well, I think on both cams

 

Ah ok, that makes sense, I assume its notched on the inside? LNF's as far as I know are identical to the 2.4's, I did an LNF exhaust cam swap into my 2.4 all but a few months ago.

 

So you haven't tried to run those cams on the car yet then? I'd imagine your idle/base running airflow would really need to be tweaked a lot.

 

Assume what is notched?

Not yet. I need to pull the oem file and have someone look at it. Hopefully someone can translate a similar lsj tune over. Just at least get it to idle so I can heat cycle it. I just need to get the block honed and then assemble everything. I don't think there are any 07-08 tunes readily available for something this modified.
I forgot to pull the oem files before I ripped half the electrical out haha

 

I assume the inside of the ring that is pressed into the ZZP cam (the one with the tack welds) is notched somehow for the cam sensor to pick up. Same way the press on for the LSJ is notched. Shouldnt be too difficult to copy some of the LSJ settings over to the L61 tune, ive been doing that for the past few weeks for my 2.4. Some of the scaling could be a bit different in the tables but you should be able to get it almost spot on. You can grab an OEM 2.2 tune file off the hptuners website.

I have a copy of the LSJ stage 2 tune as well.

 

I don't think you'll be able to get that kind of a tune file. It would be too risky for someone else to give out their tunes. I'd say disable VE and tune for MAF only. 5_Liter_Eater has a great post on HPT forums for tuning idle airflow and even gives a config. I used this to tune my airflow and it works great except my O2 sensor is bad. About to throw in the towel nailing down idle - Page 5

Also I have a stock L61 file for an auto if you want it.

 

Hmm, i might give that process a whirl and see if that gets rid of my surging and hunting idle issues.