LTX355

iTrader: (15)

look at top of page 18... ( http://www.compcams.com/information/...obesection.pdf ) Then lsk lobes listed on sites where you can make your own custom cam have the wrong lifts advertised? Is this a misprint? or do i have the wrong pdf?

LTX355

iTrader: (15)

Im looking at the first lobe 215 and it shows .666 lift with a 1.7 rocker. Sites are showing the 1.6 lift spec which would b an issue. Has this been covered or am i seeing things?

LTX355

iTrader: (15)

So no one has input on this?

S10xGN

iTrader: (11)

1-800-999-0853 should clear things up...

hammertime

iTrader: (1)

When all else fails, break out your calculator. The 1.6 column appears to be the advertised lift at 1.7. The lobe lift * 1.7 is as follows:

.370 * 1.7 = .6290
.372 * 1.7 = .6324
.374 * 1.7 = .6358
.376 * 1.7 = .6392
.378 * 1.7 = .6426

LTX355

iTrader: (15)

The lsk lobe chart shows the lift with 1.7s no math needs to b done. The lifts they show r way bigger then what the sponsors list on the sites. Am I making sense? The lifts u provided r listed as the 1.6 lifts on the chart. These r what the sponsors list and its wrong. Unless the pdf is wrong. We all know it makes no sense to list a 1.6 lift rating when all ls1s come with 1.7 or better. Basically what I'm getting at is look at the 1.7 lift column those numbers r what people will end up with if this is true info.

hammertime

iTrader: (1)

Ok, let me put it this way - the PDF is wrong.

If you do the math, the lobe lift x the rocker ratio gives you the lift at the valve. The values I calculated above appear in the 1.6 column.

Its a mis-print.

LTX355

iTrader: (15)

ok I will check it out when I get home.

LTX355

iTrader: (15)

yep the pdf is a misprint just confirmed.

Sales2@Texas-speed

iTrader: (5)

They list the different ratios for all the lobes, not just what came on the LS1's (1.7). This is because other platforms sometimes use "LS1" lobes on their cores and see what they do. Some sponsors on this forum and other LSx forums use lobes that were not built for LSx engines and sell alot of them. In many cases, they've done the R&D on this and it works great, but in other cases it can be VERY hard on the valvetrain and cause instability and ultimately broken parts.

Jenson

iTrader: (32)

NM I see the light

LTX355

iTrader: (15)

Yea I was just trying to figure out if the pdf was wrong or the sponsors when they did the lift listings on the lsk lobes. If you look at the pdf the lift ratios are suppose to start at 1.6 and not the 1.5 they list. the last column should simply b the 1.8 ratio

Sales2@Texas-speed

iTrader: (5)

Yea, I saw that. For the amount of data that was compiled for a catalog of that size, I can imagine it'd be next to impossible to get them all correct! Over-all though, they do a great job on it each year, and it's as easy as multiplying the lobe lift by your rocker ratio to get your valve lift anyway