bugy

i've heard there's a kit or something to avoid hydraulic lifters discharge when valve springs work with high pressures, does anybody know soemthing about it?

Tainted

iTrader: (9)

no idea never seen that kit.

Tony Mamo has used limiters in ls7 lifters to help with bleed down, you may ask him about how he did that if thats what you are looking for.

bugy

these are a kind of springs which go onto lifters in order to reduce pushrod pressure to avoid lifters to discharge..

WKMCD

iTrader: (2)

There are lifters with less travel in general. Check out Morel link bar lifters. There are several series. I run them with 450lb open pressure and they work fine. Mine are not the limited travel variety. What springs are you running and what's the open pressure when shimmed to .050 of coil bind with the cam you're using?

bugy

ok, what type and brand are your lifters? can you give pn from yours? also specs from your cam please.

bugy

i'm using 54-477-11 from comp cams, with a pro charger boosting 14psi, how much pressure should i add to springs boosting those 14psi?

WKMCD

iTrader: (2)

Here's a link and there is a limited travel option you can choose. I've run 234-240 XE-R cam, 230-240 .660 lift, and a 234-242 cam with them..and a couple others in the R&D process.

http://www.mcssl.com/store/cc-perfor...59fad3a420bc85

I don't do FI but I run PAC 1521 springs which I think are the best and longest lasting drop-in available. I'm still on my original set after about 25k miles and they still spec within a couple of lbs of new. Just shimmed them a little more.

pairof69s

I think he's talking about the "rev kits" that AFR, and Jesel produce for older GM V8's

bugy

yeah, i've been gathering info and founf those are called "rev kits" but are not sold for Ls-series... just wanted to know how they help lifters...

3timeracin

iTrader: (15)

The lifter trays on the LS engines are designed to do the same thing as the old rev kits. I know AFR made a kit called a Hydra-rev for the older hydraulic roller small blocks and it picked up about 800 extra rpm before valve float and made a big jump in power too.

Most important is to have a rigid valvetrain on the lifter side of the rocker and on the valve side lighter weight is important. on a boosted application spring pressure has to fight the boost too.

Mell00

[QUOTE=3timeracin;16943411]The lifter trays on the LS engines are designed to do the same thing as the old rev kits. QUOTE]

How do you figure?