Official Cam spec thread
 

Community, we need a reference sheet. Since cams are quite literally the most popular mod for the ZO6 world and there is more than a few to choose from, a thread such as this would help so many people myself included to pick a cam perfect for their combo. I myself have been playing with various cams in my software to find a perfect cam. However, tracking down cam specs can be tedious to say the least. My hopes for this thread is to copy cam card info down to the last detail and make a summary page for quick reference. I will of course do my best to work with the moderators to facilitate a clean reference sheet for quick navigation (if required). To make this list, please supply ALL requested stats for available camshaft specifications. Cam cards are the best source of information needed. I also will produce a camshaft excel spreadsheet (hopefully that I can link or email on request). Vendors and shops, if you wish to PM me all your available cam specs for ZO6, it would be much appreciated because I could knock out a bunch at a time. Please include the following information (if possible)...

Cam Part number (Brand make/model): IE Katech Torquer 110
Type: Hydraulic/Solid
Duration: Int/Exh (all numbers, @ .050, etc)
Lift: Int/Exh (@ recommended rocker arm ratio, gross lobe lift, etc)
Centerlines: (Int/Exh)
Lobe separation Angle: (if provided)
Valve lash recommended: (for solid rollers)
Lobe type: (if provided)
Int valve opening (IVO): XXX degrees
Int vlave close (IVC): XXX degrees
Exh valve opening: XXX degrees
Exh. valve close: XXX degrees

Keep in mind, the more infor the merrier. While HP/TQ made achieved is an important metric, I do not believe it will be relevant in this particular thread since we are focusing solely on cam selection and not a combination of parts or varying dyno's. Thanks in advance and I'm hoping for max participation. :cheers:

Open to ideas on how to make this better.

Taken form another post:
LS7S GRIND#
Gross valve lift: intake .612 exhaust .613
duration @ .006 tappet lift 293 305
valve timing open close @ .050 int: 10 btdc 52 abdc / exh: 62 bbdc 8 atdc
cam installed spcs @ 111.0 intake center line
duration @ .050 242 intake exhaust 250
lobe lift .3600 .3610
lobe separation 114.0

Sad but true, but I'm hoping other enthusiasts like us will realize the value of something like this and contribute. I'd even be willing to tell them HP/TQ numbers for spec'd cams on certain combo's if they were willing to contribute all the requested cam specs.

Says the guy only interested in a BTR4 because of how the idle sounds

I can give you the specs that were on my TSP 4.2 cam card. It didn't have the IVC/IVO, etc.. numbers.

248/260 .656/.655 111+3LSA

BTR 4 cam Updated

gross valve lift
.649 intake .631 exhaust
247/258
112LSA

made 606 to the tire on 91 with supporting mods. Lasted 4K miles before the #7 piston popped by the ringland and hair fractured the block from going lean. Best 4K miles I’ve driven #noregrets

Yet you have multiple threads vacillating back and forth between it and the BTR3

I wish you well on your endeavour, but my guess is that you'll get little traction on this.

That said, here's the cam card for the Katech Torquer 110 cam, 1st gen.

Cam Part number (Brand make/model): Katech Torquer 110 KAT-4727
Type: Hydraulic
Duration: Int/Exh (all numbers, @ .050, etc) 220/244
Lift: Int/Exh (@ recommended rocker arm ratio, gross lobe lift, etc) Gross lift 1.8 RAR .616/.648
Centerlines: (Int/Exh) intake centerline 106
Lobe separation Angle: (if provided) 110
Valve lash recommended: (for solid rollers)
Lobe type: (if provided)
Int valve opening (IVO): 4 BTDS @.050
Int vlave close (IVC): 36 ABDC @ .050
Exh valve opening: 56 BBDC @ .050
Exh. valve close: 8 ATDC @ .050

Without heads, compression, exhaust, intake, application, etc etc etc etc it is just a useless thread. Which is why you talk to a cam person, tell them your combo (50+ things, not just it is an LS7), what you want out of the cam , and how you intend to use it. Plus things like pushrods, wall thickness, springs, rockers, etc etc. Just went through a week long talk with Comp about a new cam for my new setup. Tweaking back and forth, selecting the right parts, etc.

Old cam was a 230/246 LXL/LXL .652/.652 116+3. New one is probably going to be around a 236/250 116+2 LSG/LSG .665 lift, but still tweaking it based on RPM limits, and goals. Just the different heads along dictate different cam choices.

Every combination is different so there is no one size fits all. Most if not all LS7s get some kind of head work and many mill to increase compression while some don't. Different people desire different manners etc. so you could have something like a 220/242 117 on one end and a 265/280 111 LLSR on the other end and pretty much everything in between. Then there is the fact people only seem to talk about Duration at .050" as quoted. That does not tell you the whole story. You could have a 235/250 114+3 cam that will open and close the valves completely differently then another with the same specs at .050" if that is all you know about it. Then there are other factors like core quality etc that rarely get taken into account.

Exactly, I was talking with Comp with .050 numbers, and they told me to forget that. Overlap at .050 is just one thing, you need to look at overall, and the ramps, etc. My old cam had 50 degrees of overlap while new one has 60. Should still drive fine. Talking about specs at .050 is one thing, but it is just a general reference point.

I'm still tweaking specs with them because I don't want/need 850ftlbs at 3k rpm. So we are moving specs around to push the power band up so it is a nice 5500-7500 stable valve train and max power up top, even if it loses 50-80ftlbs down low. Low end torque has never been an issue. Plus the new heads, valves, rockers need a different setup. Plus the new short runner intake it going to want different things.

This is the right way to go about it. I think the biggest problem that people have with the LS7 is that they try to treat them like a cam only LS1. There are more details to get right here.

exactly, useless. too many other unaccounted for variables. Those "incapable" people realize this is fruitless, those capable dont need a thread like this

Just to play along with the OP...

Cam Part number (Brand make/model): Custom LS7
Type: Hydraulic
Duration: 239/250
Lift: .652 w/ 1.8:1
Centerlines: 111/117
Lobe separation Angle: Centerlines will tell you
Valve lash recommended:Hyd
Lobe type: Custom
Int valve opening (IVO): 8.5
Int vlave close (IVC):50.5
Exh valve opening: 62
Exh. valve close: 8


The above is not enough info to properly characterize a camshaft yet still over the head of most.

Thats the better conversation but wayyy over the heads of some especially those that think they are "capable".

And?
You and the OP dont understand the usefullness or uselessness of the info you're taliking about, most importantly the IVO, IVC, EVO & EVC and the whys