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any one running roller rockers?

This is a discussion on any one running roller rockers? within the Internal Engine forums, part of the LSx Technical Help Section category; how do you like them? why type are you running? how noisey are they? any noticeable difference in perf?...

  1. #1
    O U 8 1 2 Spaz's Avatar
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    any one running roller rockers?

    how do you like them? why type are you running? how noisey are they? any noticeable difference in perf?

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    Senior Member mrr23's Avatar
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    yep. i used the vinci/crane 1.8 accelerated lift rockers in the wife's car.

    currently using the crane 1.8 shaft mount rockers in my 408.

    very quiet.

    dyno from the wife's car with stock cam and stock tune


  3. #3
    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by mrr23 View Post
    yep. i used the vinci/crane 1.8 accelerated lift rockers in the wife's car.

    currently using the crane 1.8 shaft mount rockers in my 408.

    very quiet.

    dyno from the wife's car with stock cam and stock tune

    Click for full size
    i seen an add in gmhtp for the scorpion ones... are they worth the price?

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    Slower Than a 3rd Gen juiced99ws6's Avatar
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    A buddy of mine is running the 1.8 roller rockers from SLP and his performance increase is definatly noticeable on the top end.

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    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by juiced99ws6 View Post
    A buddy of mine is running the 1.8 roller rockers from SLP and his performance increase is definatly noticeable on the top end.
    hmmm... i'd be afraid to go with 1.8 due to me getting a cam later...

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    Senior Member mrr23's Avatar
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    Quote Originally Posted by Spaz View Post
    hmmm... i'd be afraid to go with 1.8 due to me getting a cam later...
    why? because of all those claims about not using 1.8 on aggressive lobes? so long as you have piston to valve clearance and proper spring control, no problems will be had.

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    no more 4th gen secondgearscratch's Avatar
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    at what kind of lift would that start to be a problem for piston to valve with the 1.8? or does it have to do with duration...

    p.s. im stupid.

    sorry for the highjack-spaz, i have no idea how to answer your question. i am sorry and i wish i did. i too have been pondering about the scorpion rockers, they look pretty bad ass. i want em-in red!

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    Senior Member mrr23's Avatar
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    piston to valve clearance has more to do with duration and ramp rate versus lift.

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    no more 4th gen secondgearscratch's Avatar
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    Quote Originally Posted by mrr23 View Post
    piston to valve clearance has more to do with duration and ramp rate versus lift.
    youre a saint.

    oh yeah that vinci page you linked me to...i gained a VAST understanding just reading. i had no idea about some of that stuff. i thank you again.

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    Senior Member mrr23's Avatar
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    Quote Originally Posted by secondgearscratch View Post
    youre a saint.

    oh yeah that vinci page you linked me to...i gained a VAST understanding just reading. i had no idea about some of that stuff. i thank you again.
    anytime. it's one of the very few sponsor type sites that have that kind of info readily available.

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    no more 4th gen secondgearscratch's Avatar
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    Quote Originally Posted by mrr23 View Post
    anytime. it's one of the very few sponsor type sites that have that kind of info readily available.
    thats pretty true. not alot of them actually explain anything..its all product showcase, which is neither good nor bad, just how it is.

    i did just read that 1.8 rockers werent recommended by thunder racing though as i was looking at the cheater cam, which is about the wackiest duration ive seen.....

    any ideas why they say to steer clear of the 1.8s most of the time?

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    Grand Imperial Wizard Sarge's Avatar
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    I use 1.8 Cranes.............mrr23 is dead on with his advise....great upgrade in the rockers....
    This is my signature. It is mine. Nobody else has one like it.

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    Senior Member mrr23's Avatar
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    Quote Originally Posted by secondgearscratch View Post
    thats pretty true. not alot of them actually explain anything..its all product showcase, which is neither good nor bad, just how it is.

    i did just read that 1.8 rockers werent recommended by thunder racing though as i was looking at the cheater cam, which is about the wackiest duration ive seen.....

    any ideas why they say to steer clear of the 1.8s most of the time?

    got a friend of mine with that cam. it's designed for stock exhaust manifolds, hence the large amount of exhaust duration.


    they use a really aggressive ramp on some of their cams. for awhile, there weren't any springs and lifters that could handle the added ramp rate. at least that's the reasoning behind it that i can surmise. yet, people will tell you just to grind it into the cam. i ask, what's the difference? don't really get a useful answer. whether you do it at the cam, or at the rocker, the valve will move the same.

    here's my train of thought about using higher ratio rockers. i've bounced it off of a couple people smarter than me, and they seem to agree.

    from the cam, you have 4 things the valve spring has to control. the lifter, pushrod, rocker, and the valve itself. using the 'just grind it into the cam' idea will speed up all of those objects. the valve spring doesn't only control the valve, it also has to keep the lifter from 'lofting' off the cam too much and make everything do a 180* direction change. by changing it at the rocker, you haven't changed the speed of the lifter, pushrod or rocker. you only changed it at the valve. the valve spring is doing less work, for the same amount of movement.

    also, by going to a larger ratio rocker, it opens the valve easier. after all, it is nothing more than a lever. the downside to using a higher ratio rocker is that it does put more stress on the lifter. i've never had a lifter fail from the rockers.

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    Senior Member mrr23's Avatar
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    Quote Originally Posted by Sarge View Post
    I use 1.8 Cranes.............mrr23 is dead on with his advise....great upgrade in the rockers....
    thank you sir.

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    Junior Member jamie williams's Avatar
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    cAn any one tell me if scorpion rockers are good i keep hearing that they crack . i just spent 380.00 for 1.8 rockers to put on my 2000 trans am and dont want to wast my time puting them on if there just going to crack.

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    Member xmarkx's Avatar
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    so 1.8's could be used with donkey dick cams like Trex and MS4 and everything would be ok???

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    Junior Member jamie williams's Avatar
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    Quote Originally Posted by xmarkx View Post
    so 1.8's could be used with donkey dick cams like Trex and MS4 and everything would be ok???
    what are you talking about?

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    Member xmarkx's Avatar
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    rry, that's directed towards mrr23

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    Quote Originally Posted by jamie williams View Post
    cAn any one tell me if scorpion rockers are good i keep hearing that they crack . i just spent 380.00 for 1.8 rockers to put on my 2000 trans am and dont want to wast my time puting them on if there just going to crack.
    For best results and responses to your question. Try posting a new thread in the appropriate section. That way your (?) will have a better chance of getting more views than a thread that is a few years old..
    Last edited by Smittro; 08-09-2010 at 12:51 PM.
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