Camshaft challenge results
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Camshaft challenge results Some really cool guys put together a camshaft challenge. The whole thing is on YouTube weingartner racing. The shop NK performance won the challenge and they even have the winning camshaft for sale on their site. The competition was a few weeks ago some big names in it too Vizard, BTR, Summit even though I'm not surprised they haven't brought it up on here already j/k anyway, I just wanted to start a discussion about cam events since there's so much data to be gleamed from this test I feel like the more I learn the less I know I've been posting on here for years and I hate reading back what I've wrote because it's mostly all wrong. That being said, I'm not surprised that Davids camshaft had the same intake center line and lobe angle as the winning grind he just didn't have enough exhaust duration. Looking forward to hearing what others think about the data
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I was really shocked to find this hadn’t been brought up here when I checked in during and after the challenge. Bobby from NK performance and who also works as a designer for Cammotion won the challenge. It was very interesting.
Thanks for bringing it up. There was a huge thread on Speedtalk about it that got locked but, it was still up last time I checked.
Thanks for bringing it up. There was a huge thread on Speedtalk about it that got locked but, it was still up last time I checked.
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They used a restrictive 1 and 3/4-in header made for a car so less than ideal I'd say they were off to a pretty good start, The funny thing is it's like back to square one. If you look at some of the GM grinds the old ASA and then the stage 2 that's a 227 /239 108 LSA. I can't stop looking at that one then there's the stage 3. That's a 233/ 276 107 LSA I think that one's supposed to be for the LS7 The 454 LSX cam that's a 236/246 110 LSA and then of course there's that crazy 239 /251 106 LSA these are all GM spec, Jim thinks the LS l s wants a Tighter LSA
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My LS2 in a 2000 Z28 M6 car just put down 480 at the tire on a dyno that read lower than most due to a big 48 inch drum with a heavy flywheel. Heads are handported 799s with a fast 102mm intake. Cam is from cam motion on a 111+3 LSA. Maybe with a underdrive pulley and a electric water pump the motor will clear 500 rwhp. Time will tell....
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I feel like there's a lot more to be had in my restricted combo with the right cam events, I've been looking at fly cutting tools too ever since I started reading about this I just don't think I can make the power I want without doing it now. All these big cams from NK and the like are going to need fly, cut or Pistons with valve reliefs It seems like more advance and More exhaust duration is probably the way to go in most cases?
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My LS2 in a 2000 Z28 M6 car just put down 480 at the tire on a dyno that read lower than most due to a big 48 inch drum with a heavy flywheel. Heads are handported 799s with a fast 102mm intake. Cam is from cam motion on a 111+3 LSA. Maybe with a underdrive pulley and a electric water pump the motor will clear 500 rwhp. Time will tell....
Just my opinion lol
What is your exhaust? I have a walker quiet flow muffler but I have a cutout That's open whenever it needs to breathe. I need new headers though, so I can decide what size primary to run and pick a new cam at the same time. This way the cam and header could really complement each other.
The overlap and the exhaust duration on those charts is all over the place though
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I'd get a bigger cam before I would put the electric water pump on it. That's really expensive. Also, the underdrive pulley just makes it a nightmare whenever you need another belt if you can't remember what size it is I stopped using them years ago. I think it's just hard on the alternator. I don't know
Just my opinion lol
What is your exhaust? I have a walker quiet flow muffler but I have a cutout That's open whenever it needs to breathe. I need new headers though, so I can decide what size primary to run and pick a new cam at the same time. This way the cam and header could really complement each other.
The overlap and the exhaust duration on those charts is all over the place though
Just my opinion lol
What is your exhaust? I have a walker quiet flow muffler but I have a cutout That's open whenever it needs to breathe. I need new headers though, so I can decide what size primary to run and pick a new cam at the same time. This way the cam and header could really complement each other.
The overlap and the exhaust duration on those charts is all over the place though
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I feel like there's a lot more to be had in my restricted combo with the right cam events, I've been looking at fly cutting tools too ever since I started reading about this I just don't think I can make the power I want without doing it now. All these big cams from NK and the like are going to need fly, cut or Pistons with valve reliefs It seems like more advance and More exhaust duration is probably the way to go in most cases?
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There's got to be a point of diminishing returns somewhere I would think given the differences in overlap between the cams, they were all very close power wise for the most part
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headers are kooks 1 7/8 and my exhaust is a custom Y pipe with a cheap muffler that shows no difference on the dyno vs wide open headers. I had kooks true dual exhaust under the car and i wasnt happy with it. Poor fitment on the tips and also its the worlds heaviest exhaust system ever made for a F body car.
I'd get a bigger cam before I would put the electric water pump on it. That's really expensive. Also, the underdrive pulley just makes it a nightmare whenever you need another belt if you can't remember what size it is I stopped using them years ago. I think it's just hard on the alternator. I don't know
Just my opinion lol
What is your exhaust? I have a walker quiet flow muffler but I have a cutout That's open whenever it needs to breathe. I need new headers though, so I can decide what size primary to run and pick a new cam at the same time. This way the cam and header could really complement each other.
The overlap and the exhaust duration on those charts is all over the place though
Just my opinion lol
What is your exhaust? I have a walker quiet flow muffler but I have a cutout That's open whenever it needs to breathe. I need new headers though, so I can decide what size primary to run and pick a new cam at the same time. This way the cam and header could really complement each other.
The overlap and the exhaust duration on those charts is all over the place though
Last edited by DualQuadDave; Nov 14, 2024 at 03:05 PM.
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Oh definitely. Theres a sweet spot for every combination I would imagine. Similar to how most SBE stuff, anything over 230 degrees intake duration, gains start to fall off and drivability suffers.
I didnt put much thought into it because it wasnt an engine combo most here (ls1tech) would run. Any of the info wont really translate/transfer to the builds done here.
Still, it was an interesting read because of that though. Trying to guess a cam for a hodgepodge leftover garage parts build.
Still, it was an interesting read because of that though. Trying to guess a cam for a hodgepodge leftover garage parts build.
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Too many factors come into play when talking sweetspot and drivability that guys overlook. The LSA on the cam plays a major role that nost people overlook or they just go with a cam because it sounds good to them in person etc. The cross surface area plays a major role as well in getting the real power potential out of a combo. Too big of a intake valve the combo suffers on the low end and small of valve and the combo suffers on the top end.
Plot twist.... some LS3 aftermarket heads have a smaller intake than the factory 2.16 intake valve.
Plot twist.... some LS3 aftermarket heads have a smaller intake than the factory 2.16 intake valve.