FlyingLow

Title is self explanatory. Do I need a re tune? Are any special tools required for the cam phasers? What are the torque specs for the cam bearing caps?

09LAP

FOR THE LOVE OF GOD plz help the man!!! i want to find out if the hybrid-cam swap will actually work

09LAP

and yes you will most definitely need a tune with any larger cam, most likely you WILL need to upgrade your valve springs if you plan to take it over stock redline, plus the injectors start to suck ass around 7k anyways. Suggestion: supertech kit

09LAP

at least 33# injectors zzp sells them for 90 i belive. also depending on your powerband needs youll prob want some neutral balance shafts...just tryna help

09LAP

ok got ahold of chevy today and looked the head part numbers... they match, only thing i can think of is the bearings and keys on the cams that could possibility be diffrent...

shabodah

So, there are LAP cam specs somewhere?

09LAP

somewhere shab, but nobody seems to know...

nhanson

iTrader: (1)

so the LE5 has better cams?

09LAP

no no, we're trying to upgrade here but nobody sells cams for our engine and so trying to find out if they work to upgrade and buy their cams

newt

iTrader: (2)

The cam gears/phasers are all part of the same assembly that comes off together. The cams are pined to line them back up with the cam gears...so I cant see any special tools being needed.

Cam bearing bolts are 89lb-in.

Yes you will more than likely need a tune.

Valve springs are probably fine if you don't plan on bringing it past 7k, same goes for the balance shafts.

Check with GM tho for the PN on the LAP valve springs and the LE5 valve springs, 99% chance they both use the same spring.


Other than that...should be a pretty straight forward swap, then again I've never seen a LAP head before...but I can only imagine it uses all the same parts like the rest of the Ecotec family does.

I would bet the cam gears/phasers are the same between the LE5 and LAP...again check with GM if the part numbers match. Worst case, use the LE5 gears/phasers...again 99% chance they are the same.

Good luck.

nhanson

iTrader: (1)

i know this probably isnt the best at comparing but Car-Part.com--Used Auto Parts Market is showing 2.4L head available when i look up a 2.2 head (LAP)

so that means they would be the same/swappable? and if they are then we could use LE5 aftermarket cams in the LAP

09LAP

newt the springs are the same along with the retainers and seats, anything else besides the gears and phasers that i need? the actual head number itself is the same, same valve cover gasket as well

ya nhanson, i called gm and the part numbers are exactly the same for the head

nhanson

iTrader: (1)

so what is all needed to do a cam swap?

09LAP

no one knows if they will work so thats kinda wat the thread is for....but n hanson if you would like to find out more call chevy and ask them if the cam gears/phasers are the same

ItalianJoe1

iTrader: (10)

Everything should cross over, and everything you have to remove should be re-usable, gaskets and such. I know the non-vvt cars have TTY cam gear bolts, the ones on the VVT gears are much different and may not need to be replaced, i've re-used the other ones before with no problems anyway.

I don't see much of a gain from this though, the LE5 cams aren't that big, still a stock cam.

09LAP

no you dont understand, we just wanna know if they fit. personally im going to buy stage III LE5's if they do fit but i dont know wat flyinglow's plans for his are

09LAP

anyways joe we just wanted to know if bearing tolerances were the same and such

newt

iTrader: (2)

Well if the head PN is the same then you guys are laughing.

Only thing I could see having a very slim possiblility of being different is the cam gear/phaser, but a quick GM PN search will tell that tale, 99% they are the same.

Its impossible for the bearing tolerances to be differant, its the same head, means it will accept either LAP or LE5 cams.

Is anyone even sure the LAP and LE5 don't use the exact same cams? Or are you guys just assuming they are different?

09LAP

well, i assumed they are diffrent untill proven otherwise, i jusy dont wanna throw them in and start ******* shiz up ya know? but im reeeeeeally temped to go find me a pair now

09LAP

i know its kinda nuwbish to just assume but id rather b safe than srry here but ill call and ask bout the cam gears and phasers

ItalianJoe1

iTrader: (10)

Oh, for sure they will physically fit. Any ecotec cams will fit in the saddles, there are some that are longer/shorter for accy drives and such from older 2.2's or the DI motors with the extra lobes, but you could in theory bolt them in and they will work. Everything is interchangable.

The LAP motor is basically an LE5 head stuck on a 2.2L block, and since you guys are seeing that the heads are the same number anyway, it's really just the exact same thing. You could in theory use LNF cams with the fuel pump lobe cut off, or LSJ cams, if you were so inclined.

This as well. LE5 and LAP cams are probably exactly the same p/n and everything.

09LAP

no the cams are a diffrent part number witch is why it confuzed me, but i just called chevy and they have the same cam gears and phasers

ItalianJoe1

iTrader: (10)

Ok, cams on the LAP are probably a little smaller due to the lower displacement and slightly more economy bias of the engine.

I doubt there's a difference, but it would be funny if one of the other 2.4L applications had a bigger cam spec, malibu or something.

Pretty sure power ratings never changed though, so it's unlikely.

newt

iTrader: (2)

There ya go then, buy some LE5 cams and you guys are good to go.

FYI all the non-VVT ecotecs have differant keys for the cam gears, so they probably won't work, my L61 uses a knotch as well as the LSJ I believe, the LE5 I have uses a pin and so would a LAP.

09LAP

thanks guys