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I plan to find out at some point what the torque table looks like lol. I do like the GT 2-3 mentioned above but the super late ivc is really more suitable for fi or high compression and or bad tuning however the power max has similar duration at 204/222 and it's on a 112+2 LSA. I think for low end efficiency and cruise mileage The earliest Ivc possible is always best, not necessarily or specifically for idle economy because there you are just trying to use as little fuel possible but this cam is even better off idle and The most responsive at low speed more than the 212/218 115+0 that I tried in this engine first though it's slightly rougher and probably slightly less efficient on fuel around the stock idle speed it's better everywhere else.
This and the GT 2-3 are a bit unique. I get the impression the GT 2-3 was designed as an "LS6 with more". They took the late LS6 (204/218,.555/.551,117.5 ) and gave it 2-3 more degrees on both sides, a nice chunk of lift, and another degree of LSA. They ended up within a degree of negative overlap, and an IVC 2-1/2degrees later. A buff version of the late LS6, hiccups included.
The LS6 Powermax, on the other hand, went in a bit of a different direction. They added even more exhaust duration and lift, BUT sucked the LSA way down to 112,and advanced it a couple degrees! From -24 O/L to -11 O/L and a nice 32 IVC (from 39.5).
I think the Powermax should outperform the GT 2-3 by a fair margin.
Ls6 power max camshaft card
LS6 Power Max cam card
Put this in your valve event calculator G These are asymmetrical lobes super high-tech engineering advanced stuff I didn't find the card anywhere else online so here it is
I think I'm finished messing with the tune. It seems to like 22° all in up top, and stock timing below 3K is perfect. It doesn't even get any spark knock on 89 octane lol. I really should get it on some rollers
I think I'm finished messing with the tune. It seems to like 22° all in up top, and stock timing below 3K is perfect. It doesn't even get any spark knock on 89 octane lol. I really should get it on some rollers
I wanna see this! I'm betting it will make power in all the right places.
I still wonder, though, how/why such a huge duration split makes so much more power when intake duration stays at 204, though the increased overlap helps scavenge a bit. But that does not explain the late cam's increase in power compared to the early one with just a huge exhaust duration increase AND increase in LSA.
Maybe one of our cam gurus can cipher it out...
The GT2-3 is not a good choice if you want max power at 5500 rpms. It's made to rev to 6500-7000. I ran it and loved it for its quiet idle, great drivability, and better topend power. However I wouldnt use it for OP's goals. You'd be better off with a triple 12.
The GT2-3 is not a good choice if you want max power at 5500 rpms. It's made to rev to 6500-7000. I ran it and loved it for its quiet idle, great drivability, and better topend power. However I wouldnt use it for OP's goals. You'd be better off with a triple 12.
OK, refresh my deteriorating memory cells... what is the "triple 12?"
I've heard that name before but can't relate it to anything.
OK, refresh my deteriorating memory cells... what is the "triple 12?"
I've heard that name before but can't relate it to anything.
Forget the members name on here who started it, but they sell a family of them 212/212 on a 112 LSA, and then they have a 215/215 on a 115 and a 218/218. The triple 12 would drive like stop and have great lowend. It got its cult following from the boost people but would work fine NA. I would still get a truck cam as the number 1 option, but if it had to be between those 2 I'd go triple 12 over a GT2-3.....and I have a soft spot for the GT2-3
Forget the members name on here who started it, but they sell a family of them 212/212 on a 112 LSA, and then they have a 215/215 on a 115 and a 218/218. The triple 12 would drive like stop and have great lowend. It got its cult following from the boost people but would work fine NA. I would still get a truck cam as the number 1 option, but if it had to be between those 2 I'd go triple 12 over a GT2-3.....and I have a soft spot for the GT2-3
Thank you! It shows there is still a place for "straight pattern" cams with equal duration I/E numbers.
When BTR came out with their Truck Torque cam with its lower-than-norm 111 LSA it surprised me. But when I saw minimum 20# torque increase down to 2500 RPM my eyes got opened. Previously you never saw less than 114 LSA in any mild cam. But with 202/202 and 111LSA you still have -20 overlap, which tells me it will idle like a stocker. Truly best of both worlds here. I'm curious to see what Summit has in store with a new line of small cams in the next month or two. We shall see. Summit is on a fast roll....
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