hey guys,

i was just wondering if 1.8 rockers really worth it if you already have heads and cam ?

my cam is a .566 lift i/e sides . with 1.8's it would take me to a .599 lift ,if i did the math right .

it's seems to be a little sleeper mod ,but the cost of rockers alone is the only thing holding me back . what do you guys think ? thank in advance

 

1.8's dont work well with aggressive ramp rates of aftermarket cams from what ive researched.

your math is right

id just get a new cam with the lift built in if thats what you want.. 1.8's may also require new pushrod length so factor that cost as well. if you buy a new cam with the same base circle as your 224 you should be able to reuse your pushrods assuming they are not stock...

 

whats the math

 

.566 / 1.7 to get base cam lift then the result of that times 1.8

 

Thanks Got-A-LS1. I was thinking the same thing ,but it's a question I had to ask. Getting a new cam would make sense. As for now , I'm very pleased with my combo.

 

rockers not worth it, better off going with cam as previously posted

 

no prob, yea your making some good power now with id guess some great drive ability.

 

putting 1.8's with a small cam will not net you the same gains as a bigger came with more lift. i tryed doing it and not worth it

 

I have 1.8 cranes gold rr and they work fine for me. My total lift is now .589

 

They are ok if you are going for sleeper full bolt on power but if you have or are planning on getting a cam it doesnt make sense to waste the money. Besides I dont see .033 of lift making that big of a difference in your combo and 1.8 rollers will run about $400 and another $100 for pushrods is alot to pay for a few ponies, add a little more and you have enough to buy a bigger cam and swap it in.

 

yep... basically there is never a reason to spend the money on 1.8's. dont need them with an aftermarket cam and why waste the money on a stock cam.

 

Imagine if you got a new cam with bigger lift AND 1.8 rockers....the possibilities. I've run 1.8 Crane Gold Race rockers for 5 years and it's one of the best investments I've made. They really are not hard on your valvetrain like people say. With the right set-up the 1.8s are highly beneficial.

 

i must admit it is tempting, but i would like to see if more people has done this and what kinda gains they have seen both on the dyno and the track .

thanks for all the input ,guys.

 

sweet !! what kinda numbers are you running since you have installed them ?

 

damn. thats true too .

 

yea it is. my cars drive ability is great !!! to be honest , i am looking into another stall like a SS4000 or a Vig4000 , but thats another subject for another section.

 

What is the "right" setup? The 1.8 rockers were stock in the LS7 if I'm not mistaken. That and the LS7 cam were purposely put into the LS7 to work with the head design. I have seen a couple of applications with LS3 base using 1.8 rockers on the exhaust to boost exhaust flow versus intake. Seems to work well especially in boosted application.
But what would the "right" setup be with the GenIII cathedral port heads?

 

I reed in GMTHP that it was recomended to change the rockers to roller if you have more than 0.550inch of lift.
http://www.gmhightechperformance.com..._arm_type.html

so rockers would be a good thing, but i would not go with 1.8 i would go stock 1.7 ratio.

 

Exactly. The correct components were matched up precisely for a positive end result, they were not just thrown together, as some people add parts to their car just because it "has the most hype" and it may not be suitable to their set-up. What he should know is that no, it's not really going to help if you put them on a mild cam, but a larger cam would definetly benefit from the 1.8 rockers. It's like putting new gears in the rear and not matching the converter correcly for optimization.

 

i have hs 1.8 on my car (224/230 .581 and .591) cam my new lift is: .615 and .626