Nastyc4

iTrader: (13)

Few questions. Are the stock retainers ok to reuse? Stock locks ok to reuse? have 125k miles on the stock valve train. Im installing crane 1.8 rrs and am upgrading to 26918 comp beehives. Should I reuse the stock components with them?

02*C5

iTrader: (1)

Why r you going with 1.8 rockers?

Nastyc4

iTrader: (13)

for some extra ponies

Nastyc4

iTrader: (13)

and cuz i wanted to freshen the valve springs anyways motor is lazy above 4500

Nastyc4

iTrader: (13)

ok to re-use stock retainers and locks on 26918s ????

bww3588

iTrader: (49)

if your looking for "extra ponies" your looking in the wrong place....

02*C5

iTrader: (1)

my point exactly you are going to use a 1.8 rocker ratio on a cam that is probably ground for a 1.7 rocker ratio. also you are probably using stock heads which have not been prepped to support an market rockers and are not engineered to work with a 1.8 rocker ratio.

Your "looking for love in all the wrong places..."

bww3588

iTrader: (49)

ahhh Waylon Jennings.....good times good times.

vettenuts

iTrader: (4)

Yes. Depending on your total lift and installed height you may want to shim them to a higher seat value.

bww3588

iTrader: (49)

You don't shim the retainers. You shim the spring pocket.

Nastyc4

iTrader: (13)

I'm using a 1.8 Rocker ratio because its the equivalent of an extremely tiny cam and its proven to produce a little hp. The rockers were used and cheap and my valve springs needed refreshing anyways woth 125k miles on the clock. I figured if I'm going in there I may as well throw rockers on with new springs and pushrods.

Yes I am using stock heads and yes I believe the stock cam is ground for a 1.7 stock rocker. The Crane Rockers however ARE designed to be a bolt on both of those and produce a little hp for those who don't want to go into the motor. And that would be me. Quotes for Cam installs are absolutely rediculous up here in Canada with all the greedy shoppes hoping to make a buck off an idiot with an ls1. I don't plan to fall into that category.
I don't want to tear into the motor just yet so bolt ons are good enough for me.

Rockers = $220
SPrings/pushrods = $210
Install : Free (me)

Cam quote installed from 2 local shoppes : $2700, $3200 . Ask me again why I'm doing rockers??

LS1GMCTruck

iTrader: (2)

I like my Crane Gold 1.8's on my stock 2001 LS1. But...via my research for a future LS6, or "hot cam", I believe I have to somehow go back to 1.7 rockers.

Nastyc4

iTrader: (13)

Cool,

did you reuse locks and retainers? what springs did you go with?

vettenuts

iTrader: (4)

I know that and assume the OP does as well.

bww3588

iTrader: (49)

Idk. He thinks he is gonna get power out of 1.8 rockers...

bww3588

iTrader: (49)

The problem here is that the extra maybe 2-3 hp you will gain is not worth all the downfalls of thoes rockers. A different cam is not just lift. Its duration as well. All your doing is increasing lift by a little bit and increasing valve speed.

Nastyc4

iTrader: (13)

I'm pretty sure theres more than 2-3 hp in them or at least thats what i am convinced of. Crane claims 15-20 which is probably on the high side but there are numerous people showing some gains when dynoed. Either that or they are trying to make themselves feel better.

Increasing lift and valve speed... isn't that what aftermarket cams do? if anything higher lift rockers create less stress on the valvetrain than bigger cams do. the increase in speed etc are also why crane calls for stiffer valvesprings which was on my list since I bought the car anyways.

bww3588

iTrader: (49)

aftermarket cams also increase duration, which means a cam with a lower duration will have a quicker valve speed because it opens later and closes sooner, but still has to acheive the desired lift, which is higher with 1.8 rockers. you are spreading the same lift over a longer period of time which the lifter is off the basecircle and on the lobe itself with a longer duration cam.

as for the "crane claims 15-20 hp..." there is a reason crane went out of business.

not that that matters, because comp claims the same gains with their 1.52 roller rockers for the LT1. but you have to remember, these companies are in business to make money. what happens is this. they make a baseline dyno run on a stock engine, then change the rockers and dyno it again and pick up 15 hp. but what they dont tell you is " well we changed the cam to take advantage of the 1.8 rockers."

bww3588

iTrader: (49)

aftermarket cams also increase duration, which means a cam with a lower duration will have a quicker valve speed because it opens later and closes sooner, but still has to acheive the desired lift, which is higher with 1.8 rockers. you are spreading the same lift over a longer period of time which the lifter is off the basecircle and on the lobe itself with a longer duration cam.

as for the "crane claims 15-20 hp..." there is a reason crane went out of business.

not that that matters, because comp claims the same gains with their 1.52 roller rockers for the LT1. but you have to remember, these companies are in business to make money. what happens is this. they make a baseline dyno run on a stock engine, then change the rockers and dyno it again and pick up 15 hp. but what they dont tell you is " well we changed the cam to take advantage of the 1.8 rockers."

Nastyc4

iTrader: (13)

Remember I'm not making the argument of Cam vs Rocker ratio. Lets look at the cost/hp ratio between my options.

Cam (something mild and streetable) say 50 hp max. $54 / hp

10 hp with rockers = $40/hp

win in my book if it gains more than 6 hp.