Question about lifters...Pistons...Rings...Gaskets

[EspanolaGuitarista]

How much lift over stock can our lifters take before they fail?

Can I find forged or any comaparable pistons in larger than .060 overbore?

Do they make high-perf gaskets that can take more compression without blowing out or should I have copper ones machined?

[614streets]

Yes the MR gasket SOLICOR Line has gaskets for 2.8 v6 that are used for nitrous and boost. I just run regular FEL PRO however.

A larger than .060 is not common and would most likely be a custom order

A lifter should not fail at any point unless it is not being oiled properly. However it is important to run the right pushrod springs and lifter type depending on the maximum RPM and spring pressures.

[Corpse]

I havent gotten around to measureing yet but, I am wondering how much lift the non-roller rockers can accept. I would assume it to be somewhere around .450 gross lift.

Edit:

Sorry I took so long, even though this isn't really relevant to this post. But, I measured the stamped rockers max lift. It appears to be about .400 at the valve. That is about the full swing of the rocker though. I didn't measure where the stud sits in the slot on the rocker when installed, so, maximum lift may be even less.

But, it is hard to tell becuase I did not do calculations for the "circle" that the rocker revolves on, I did calculations as if the slot was used on a flat surface. So, Max lift capability may be higher but, as I mentioned, the installed position of the rocker stud is not going to be all the way at one end of the slot. So, to myself I will see .400 at the valve as the limit for the stamped rockers.

Also, about lifters, as was mentioend. A hydraulic lifter's limitation is based upon RPM only. (pretty much) Throw down as much lift as you want on them.

As for the pistons, you may be able to find a mass produced piston that suits your needs. Just open a catalog and look for something with the same Bore, compression height and pin size. You probably won't be able to find the same compression height but, as long as it is very close, just work with it.

-Dave