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I don't have a legitimate build history on my 2016 Z. Trying to untangle it.
Allegedly (per the selling dealer who had to be going by word of mouth and can't verify internals) mods include cam, ported heads, ported blower, Halltech (verified), Kong 103 TB (verified), meth (verified), 2.175 upper/stock lower (verified), catless X-pipe (verified). Dealer had it tuned and gave me a dyno sheet from East Coast Supercharging that claims 755WHP. I contacted Doug who remembers the car, but of course there's no way for him to remember details about every car he sees.
Considering adding a 15% lower and headers. What's the odds this is the stock cam? I see guys all over the place claiming 750-900 on the stock cam. What's anybody else getting? Any way to back figure (estimate) cam specs?
Wouldn't you be able to hear if it's cammed? I don't think you're getting to 755 whp without a cam unless you're running e85 and spraying a lot of meth. People getting to high 700s+ on the stock cam usually have a lot of other fueling mods to go with it (lowside, HPFP, injectors, port injection). If you don't have any of those the car likely has the mods mentioned.
Not sure how you'll find the cam's specs. Those will be very useful for future modding/tuning purposes.
Wouldn't you be able to hear if it's cammed? I don't think you're getting to 755 whp without a cam unless you're running e85 and spraying a lot of meth. People getting to high 700s+ on the stock cam usually have a lot of other fueling mods to go with it (lowside, HPFP, injectors, port injection). If you don't have any of those the car likely has the mods mentioned.
Not sure how you'll find the cam's specs. Those will be very useful for future modding/tuning purposes.
There is VERY little if any chop. But I've heard some cams run this way. I'm new to meth, but I'd say it's on the low side, but it has dual nozzles, so I could be off base. Stock low side, no port added and highly doubtful injectors were swapped.
There is VERY little if any chop. But I've heard some cams run this way. I'm new to meth, but I'd say it's on the low side, but it has dual nozzles, so I could be off base. Stock low side, no port added and highly doubtful injectors were swapped.
So maybe it has some type of mild cam.
Not many change injectors on the LT4, unless they are going max effort and throwing the book at the car in money. Injectors are $3k to $4500 for a LT4. Any tuner with HP Tuners and the ability to data log could probably data log the fuel system and tell you if the vehicle has a cam in it. most of those aftermarket cams have a +32 or +38 fuel cam lobe on them.
Wouldn't you be able to hear if it's cammed? I don't think you're getting to 755 whp without a cam unless you're running e85 and spraying a lot of meth. People getting to high 700s+ on the stock cam usually have a lot of other fueling mods to go with it (lowside, HPFP, injectors, port injection). If you don't have any of those the car likely has the mods mentioned.
Not sure how you'll find the cam's specs. Those will be very useful for future modding/tuning purposes.
2019 C7 Z06 here, mine has a Cordes 5" CAI, 2.3" upper pulley, E85 kit, AWE Catless x-pipe and is tuned on E55. Puts down 700rwhp and has time slips and dragy runs to back the 700rwhp up. My fuel system is bone stock.
2019 C7 Z06 here, mine has a Cordes 5" CAI, 2.3" upper pulley, E85 kit, AXE Catless x-pipe and is tuned on E55. Puts down 700rwhp and has time slips and dragy runs to back the 700rwhp up. My fuel system is bone stock.
So you aren't running a cam? Good to know. Sounds like I can wring a few more HP out of her regardless of whatever cam is in there.
I made 1000whp and 1010lb*ft on the stock cam. Took some timing out of it and settled in at 972whp and 955lb*ft but I’m not depending on the stock fuel system and am running port injection.
I am assuming what you're truly asking is does the cam have a 32% or 38% fuel lobe. If it has "chop" that doesn't mean it has a upgraded fuel lobe to help the high pressure side. Nobody in their right mind would do a cam without the fuel lobe changed, but stranger things have happened.
I would imagine that a good tuner could look at rail pressure and tell you if it matches what they'd expect from a cam with a non stock fuel lobe.
Post a video of the car idling, we can tell you if it has a aftermarket cam, but we can't tell you if it has a 32% or different fuel lobe. Or pull intake and look at the valley cover, this would tell you if DOD has been deleted. That would be a tell tell that their has been cam work. Again, it doesn't answer your question about the fuel lobe though.
I guess to put a finer point on it, since I can't confirm the cam, I can only make mods and have expectations under the assumption the cam is stock. So I'm trying to set those expectations and a plan forward.
No chop. Very minor if any difference form what I'd expect from a stock cam. Video below is a warm idle vs hot.
I'm in the process of finding that good tuner locally. I need to get a confirmation baseline on a dyno.
Yea that sounds like a factory cam. So the odds of someone putting in a factory cam (spec) with upgraded fuel lobe are slim. Not impossible, but slim. I would assume the cam factory in every way
I made 1000whp and 1010lb*ft on the stock cam. Took some timing out of it and settled in at 972whp and 955lb*ft but I’m not depending on the stock fuel system and am running port injection.
That's damn impressive. Would you mind sharing your build specs?
You could absolutely have a cam in it with a nice idle.
Can always ck the old school way with a dial indicators, valve cover off.
I have heard a few "stage 1" cams that have a smooth idle like mine. It's not important enough to me to go through all that with dial indicators. I assume you mean watching valves by turning engine by hand? Measuring rotation angle and measuring lift.
05-17-2022, 12:58 PM
How much HP on stock cam?
