Lifters are the same on both the intake and exhaust sides, also the same lifters in the HFV6, I.e. The CTS-Vsport engine, etc.

 

im running them in mine right now while i have the solids reground to kill some of the duration if you look at my graph you see the dips in the tq and hp line is where the lash adjusters are collasping tvs 2.8 50 shot

 

So if I were to throw the cams back in, would it be worth it to get a set of these instead of my stock ones?

 

From the sounds of it they will both compress under high boost/spring pressure, but the new ones have less chance of failing/breaking due to a stronger overall assembly.

 

Interesting, and probably worth it.

 

Not trying to argue, but I thought you didn't have the latest lifters, at least that was the impression you gave me in the other thread.

Side note, I imagine later exhaust cam timing would help them from collapsing, but I wonder if that would hurt performance worse than the lifters collapsing.

Another side note, anyone know if sr20 motors have the same issues? Their lifters look similar to ours, just bigger.

FWIW, I bet these lifters would be just fine for 85% of the people on the board.

 

i dident think i had them either untill i swapped the comps back in

 

One interesting note, at least to me, the dyno graph shows the dip but looks as if it recovers shortly after. I am judging this by the spread between the 2 runs. If that's the case, then how would a collapsed lifter recover? It shouldn't, and maybe all I am seeing is the power rising and it should be the amount it dips higher than it is from that 5200ishrpm point.

 

they will to a point then recollapse thats where the second dip comes in but a hyd setup would be good for most people

 

Wow you can really tell when the nitrous comes on haha

 

Wonder if cryotreatment would help at all?

 

I don't think that's lifters collapsing. I would try closing the plug gap or adding some dwell. It could also be fuel related but I don't know how your nitrous is setup.

 

the gap is .026 and adding dwell dident make a difference

 

What cams were you running on that dyno? Factory? Your custom specs?

 

a set of comp custom

 

Not to give away your setup but could you tell me here or through pm me cam specs? At least just your exhaust cam timing. Just collecting data.

 

note sure if these will even fit but just came across something and ill throw it out there for you guys to look into or shoot down lol


ZZP has "high rpm lifters" for the LTG motors. They come with the ATS cams that they sell.

---- its in the description here, not sure if they fit the LSJ or LNF though.
ZZP LTG Performance Cams

 

 

Is that the latest?