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1st off, I picked up a 6.0 gen 4 motor that I have no idea what it came from. It’s stamped as a 6.0 has VVT and a AFM valley cover. It’s an IRON block?? Plan to pull heads and see what’s up before ordering parts.
I initially thought it was an ly6 as everything lined up till I saw they don’t have AFM. Motor has 823 heads and a truck intake. Anyone have any ideas?
2nd, this thing is going In a Jeep. I need that low end power. It’s a crawler that will see street/cruise time. I was really considering doing a 212/218 cam and made some phone calls that didn’t exactly help me decide a cam. (BTR, Texas speed)
BTR sales offered no input/suggestions. Texas speed advised that the 212/218 cam is to small for my motor and to step up to the stage 1 216/229 VVT cam! I haven’t been able to find much info on this especially with needing low end power. He was adamant that it would work well for my application but have been hesitant to pull the trigger. I’m looking for advise and or 1st hand knowledge.
im okay with retaining VVT, but more so worried about the size of the cam for what I do. Any help/info appreciated!
Dig into the motor today and found several things that are concerning. Someone plugged the AFM ports with a piece of metal and silicone. (Pictures below)
can anyone identify this camshaft? Looked everywhere with no luck. 1 bolt cam. Hoping I can have some idea what this came from.
Looks like a mess to me. No telling where the extra silicone is in the engine. I've done a couple of vvt deletes on L92's (6.2) and I buy the complete kit with a 3 bolt cam from Texas Speed. Talk to them about the AFM delete.
That bigger cam seems ok to me. Make sure you gear you rig for low end performance.
Looks like a great Jeep project.
That's for sure a GM camshaft with the barcode on it like that. Here's the stock LY6 camshaft info Duration @ .050 in. (int./exh.) 196°/208° Valve Lift (int./exh.) 0.467 in./.479 in. Lobe Separation Angle 116°
Re: picking a camshaft, check out Richard Holder's "truck norris" video on YouTube. That would be my thought for low end power in a 6.0L for your Jeep.
I just checked Summit's engine database.
NO 6.0 iron blocks (LY6, LC8, or L96) have DOD activated though the block might be equipped for it, which does happen.
Summit's new Big Truck Torkinator SUM-8728R1 has an early 33* intake valve closing to create low end torque; but still a decent amount of overlap and lift to carry the power past 6k in a 6.0L. As stated, you'll need a AFM/VVT delete kit. Milling the heads would also bump up the low end.
Re: picking a camshaft, check out Richard Holder's "truck norris" video on YouTube. That would be my thought for low end power in a 6.0L for your Jeep.
I looked at the BTR truck Norris cam earlier today. I’m almost sold on it, but a little worried about the LSA being 107 and the idle/chop.
really liking this cam besides that. Concerned it might be to much for a crawler.
Originally Posted by G Atsma
I just checked Summit's engine database.
NO 6.0 iron blocks (LY6, LC8, or L96) have DOD activated though the block might be equipped for it, which does happen.
Same thing I’ve found. I have found nothing other than the block serial comes back as a ly6/l96. I guess someone could have put the dod cover on it, but why would they??
I looked at the BTR truck Norris cam earlier today. I’m almost sold on it, but a little worried about the LSA being 107 and the idle/chop.
really liking this cam besides that. Concerned it might be to much for a crawler.
I hear ya. Check out his Truck Cam Stage 1 V2 then, that would sound a little better if you don't like the 107. Stage 1 Truck is 112 LSA. Video clip on the page
Same thing I’ve found. I have found nothing other than the block serial comes back as a ly6/l96. I guess someone could have put the dod cover on it, but why would they??
I've read that some engines came with all the hardware to operate DOD/AFM, but are not programmed to actually use it. The Australian car L76 is this way. This may well be another.
If it has the DOD lifters in it, you’ll want them gone. You’ll end up with the heads off to find out. I’d be interested to see what lifters were there, as it would give insight as to whether or not someone changed the valley cover out, or maybe someone wanted both VVT and DOD, then changed their mind? Maybe just an experiment by someone? Lifters will tell. GM did not make this mess, it was an individual.
Keep talking as it can't be a unicorn and I got the same block....whats special or makes it that different besides the cam sensors placement or the reluctor wheel?
02-13-2022, 10:11 PM
Gen IV unicorn 6.0? Cam swap/keep vvt? 
Get ready for a lot of hit.. My stock L33 is a handfull in my YJ..