badmfkr

iTrader: (4)

are the comp. lifters good for 6500RPM levels, actually my shift points are a tad lower (I like a safety margin).

https://www.vengeancerd.com/ecart/pr...cement-Lifters

I have been studying up on lifters and am finding that the LS7s are highly recommended (just don't exceed a stock like RPM there not designed for a agressive cam or even a mildest cam)?

The safest and most expensive is Moerel . for my RPM level isn't this over kill?

I'm planning a head upgrade and plan to upgrade the valvetrain w/ rebuilt HS OEM rockers w/ trunion upgrade, comp. PRs, Patriot valve springs.

just confussed on the lifters.

Thanks for any helpfull feedback.

Kurtomac

iTrader: (5)

stock lifters are fine to the rpm's you mention...stock LS6 limiter is 6600...so theres your proof...stock ls7s are 7k limiter....the comp lifters you mention are fine as well...I have those in my engine at it see's 7000 with fairly agressive springs and lobes

Kurtomac

iTrader: (5)

btw what cam are you running...you mention shift points below 6500...sounds like a stock cam to me...dont be scared to spin that baby

badmfkr

iTrader: (4)

how long (time) and how many miles do you have on you're comp. lifters?

my street stripe cam specs.
DUR @ .004" 278*/ 286*
DUR @ .050" 216*/ 224*
LIFT .551/.551
OVERLAP 53*
LSA 115*

it stopes making power around 6250RPM

so the rev. limiter is always higher than A4 shift points?

I believe the tuner only increased the shift points.

Also do you know if the 243 & 853 rockers are the same?

Thanks

SOMbitch

iTrader: (8)

Yes they are the same rockers.

The comp lifters are ok but are very sensitive to preload. LS7's are more than adequate for what you are doing......

Kurtomac

iTrader: (5)

hope that helps

badmfkr

iTrader: (4)

comp lifters are ok but are very sensitive to preload I'm not a mechanic just a bolt on Guy so I don't understand some of the termenology.

Think I'll read more on the LS7s.

Thanks for the advice
how long (time) and how many miles do you have on you're comp. lifters? a year and a half and about 6000 miles about 4000 miles with XER Lobes and 2000 with LSL lobes

my street stripe cam specs.
DUR @ .004" 278*/ 286*
DUR @ .050" 216*/ 224*
LIFT .551/.551
OVERLAP 53*
LSA 115*

it stopes making power around 6250RPM how do yoiu know it "stops" making power there?

here's what VHP says about the Boss cam

THE BOSS
STREET / STRIP CAM / AUTOCROSS
POWER RANGE 2000 TO 6200
TUNING & STALL CONVERTER DESIRED
PERFECT FOR SUPERCHARGERS
POWERFUL CHOPPY IDLE

I understand that the smaller cams compared to larger are better for low & mid level torque and and kindof level off on HP at higher RPMs? my bet it will carry a bit beyond peak; you will not want to shift at peak power but shifter higher to put it in the highest part of the powerband for longer

so the rev. limiter is always higher than A4 shift points? yes the limiter will be higher than your shiftpoint you dont want it knocking the limiter every time it shifts

I believe the tuner only increased the shift points.

Also do you know if the 243 & 853 rockers are the same?Same


I've read that it's recommended to use the LS2 lifter trays?

I was planning on drilling two 1/2" holes in the side of each LS1 tray for better oil drainage?
The Guy's on Horsepower TV recommended this when building the LSGun (red camero pro charger build)
Any thoughts on this?

Thanks for advice

99blancoSS

iTrader: (115)

Its not the peak rpm, its the sustained rpm and how often your engines see's peak.
There is more involved as well like oiling and driving conditions and windage. Lots of things can contribute.

Each driver is different. You could all have the same exact setup and everyone will have a different result. I drive hard, very very hard. My 347 was on the upside of 5000 rpms more than it was on the downside.

But I know there are those who just thrash it once on a dyno to get a peak number to post and then never really hammer the car after that. SO if they have an agressive setup and good luck with stock lifters it's more due to lack of abuse.

Where someone else with maybe a milder lobed cam setup has the wheels com off the lifter because they are at 5500 rpms + more often than not when they go out and drive the car.

You cant say for certain, you can only look at the application and make the decision based on that.