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It's not coming the the valve cover area though. That's why I think it might be the lifters. Those were just reccomended to me because of the success they have had with them
BTW, speaking from experience (having pulled the motor for a rebuild on no less than 2 occasions, sigh) there's almost no scientific way of figuring out where ticking is coming from. Not with the reverb halls that are our aluminum blocks. I've had tens of experienced mechanics and engine builders try to figure out the issue from above but in all cases were wrong. Pulling things off is sadly the best way.
__________________ -- 2006 Red CTS-V -- 402 forged stroker -- TVS 2300 supercharger -- Meth -- Need I say more!
I dont want springs that will **** up my setup. I dont think the boys at cunningham would set me up for failure
You know my story. Heavy springs (mine were v similar to yours, maybe a tad heavier) essentially caused very premature cam wear and a couple of morel lifters to take on some face paint as a result. This is daily driving, not on the track. Not saying that happens to all but my engine builder (who seemed to know his crap) was very insistent to be careful with dual springs (as they are inherently heavier with more seat/open pressure), and only use them if I absolutely need them.
I'm also always confounded by shops that sell kits with light titanium retainers, lighter rocker arms etc etc, designed to lighten your top end then slap on a massive/heavy dual valve spring. Makes no sense to me.
You can get lighter duals or good singles.
__________________ -- 2006 Red CTS-V -- 402 forged stroker -- TVS 2300 supercharger -- Meth -- Need I say more!
High cylinder pressures with boost. Weak valve springs cant handle it.
While this is true, 145# of close pressure is extremely higher than the stock 95#. On a lower lift cam with boost he should need to run more than 120# of closed pressure. too stiff of springs will cause failures.
While this is true, 145# of close pressure is extremely higher than the stock 95#. On a lower lift cam with boost he should need to run more than 120# of closed pressure. too stiff of springs will cause failures.
Correct. 120 on the seat and under 400 open is what you should be aiming for.
__________________ -- 2006 Red CTS-V -- 402 forged stroker -- TVS 2300 supercharger -- Meth -- Need I say more!
While this is true, 145# of close pressure is extremely higher than the stock 95#. On a lower lift cam with boost he should need to run more than 120# of closed pressure. too stiff of springs will cause failures.
I wasnt necessarily saying that the springs he was using were ideal, but a cam with 560 lift and boost wouldnt be good with springs rated for 575 lift. Also all dual springs witha lift rating and titanium retainers are not created equal.
Patriots for example use titanium retainers that are considerably heavier then a set of PSI springs with titanium retainers.
Mine was quite similar, not as bad and none of the lifters were that worn down but yeah cam lobe was toast. Wish I kept a pic but changed phones and lost a bunch of pics.
Expensive lessons these.
__________________ -- 2006 Red CTS-V -- 402 forged stroker -- TVS 2300 supercharger -- Meth -- Need I say more!
