100% Percent absolutely correct. Its the BS that pisses everyone off with the VVT - sort off like EFI did in the mid 80s....

 

with a stock 6.2 cam we did have a long day with the tuner to get more power

we even returend to him the day after for more tunning

the result..

the denali was mad fast,shifting was perfect engine responded very fast we did 140+ mph and the motor keept going it actually shifted from 4th @ 6200 to 5th and even with an over drive gear it still has more

vvt rocks IF its done properly but with the bigger cam shafts youll have to tune at least each 100rpms timing,f/a to get it right

thats what the tunner told us

 

Nice!

 

Indeed its still quite a leap for most tuners thus far but once the knowledge and likely the tuning suites themselves get dialed in to VVT tuning I think it will become much more popular. As fo now from what Ive read the only suite that actually tunes VvT is efiLive. HpTuners has a beta with some VVT tuning ability but its not to the same extent.

I've also read that when you change cam timing it also changes fueling and ign timing as well so you have to work through all three together which sound like a MAJOR pitfa. What would be sweet is if you could simply set the cam timing and then A/F it and set the ign timing just like you would a static cam.

 

اow about the LS3 HOT CAM with bigger lifters? 1.75 maybe?

 

As you can see from the GMHT test, the GM LS HOT cam makes decent power (around 520hp). GM installs that cam in its carb variant of the LS3, and it makes 515 HP with that cam. Adding more rocker ratio (like 1.8) should net you another 10-15HP, I would think.
With 1.8 rockers, it would have .554" lift, which is still less that what most LS3 cams are running now, which is around .600".
The intake ports on the stock heads stall at around .630" lift, from what I've read, so in theory you would want as much lift as possible up to about that point, bearing in mind that higher lifts kills vavle springs quicker, and there are some that say the stock LS rockers start to bind above .575", although there are tons of people running over .600".
I would say a cam with around 230 intake and 244 duration @ .050" and .600" lift, with 112-113 degree LSA and an aggressive lobe design, would be a good max effort street cam that will make over 550hp on an otherwise stock LS3/L92. But it will have a choppy idle and require tuning. Also, bear in mind the L92 has heavier valves that the LS3, so better springs are required to avoid valve float.

 

lots of great reading over here . . .

https://ls1tech.com/forums/generatio...s-learned.html