are 1.8 rockers a good idea?
11-08-2005, 11:22 PM
#1
are 1.8 rockers a good idea? ive searched and came up with nothing.
just wanted to know if theres a down fall from going to these rockers. what kind of gains have people seen? this would be going on my car that has a stock cam and runs na. i have aftermarket pushrods.
i was thinking of the harland sharp 1.8's. i also see they have 1.85's...anyone using those?
thanks a lot
just wanted to know if theres a down fall from going to these rockers. what kind of gains have people seen? this would be going on my car that has a stock cam and runs na. i have aftermarket pushrods.
i was thinking of the harland sharp 1.8's. i also see they have 1.85's...anyone using those?
thanks a lot
11-08-2005, 11:29 PM
#2
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If you never plan on putting a cam in your car and want to get the most out of the stock cam. They are a great idea ... i think they are good for about ~10-15hp (i'm pulling that from way back in my memory tho, so don't quote me)
As far as I know there aren't any downfalls to using them on a stock cam, or a mild cam that its ok to use them on. You might need to look into springs though ... b/c the 1.8 rocker arms is in effect opening your valves more, which means your springs are being compressed more than they are w/ the 1.7's. The difference might not be enough to justify stiffer springs. But that might be one question to get answered before you put them on the car.
As far as I know there aren't any downfalls to using them on a stock cam, or a mild cam that its ok to use them on. You might need to look into springs though ... b/c the 1.8 rocker arms is in effect opening your valves more, which means your springs are being compressed more than they are w/ the 1.7's. The difference might not be enough to justify stiffer springs. But that might be one question to get answered before you put them on the car.
11-08-2005, 11:52 PM
#3
Originally Posted by FstBlkz28
If you never plan on putting a cam in your car and want to get the most out of the stock cam. They are a great idea ... i think they are good for about ~10-15hp (i'm pulling that from way back in my memory tho, so don't quote me)
As far as I know there aren't any downfalls to using them on a stock cam, or a mild cam that its ok to use them on. You might need to look into springs though ... b/c the 1.8 rocker arms is in effect opening your valves more, which means your springs are being compressed more than they are w/ the 1.7's. The difference might not be enough to justify stiffer springs. But that might be one question to get answered before you put them on the car.
As far as I know there aren't any downfalls to using them on a stock cam, or a mild cam that its ok to use them on. You might need to look into springs though ... b/c the 1.8 rocker arms is in effect opening your valves more, which means your springs are being compressed more than they are w/ the 1.7's. The difference might not be enough to justify stiffer springs. But that might be one question to get answered before you put them on the car.
11-09-2005, 12:03 AM
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Originally Posted by slow3hoe2
yeah i was gonna look into springs too. i dont really plan on doing a cam anytime soon...my car runs pretty good with the stock cam...so i will probably just leave it for a while. and if i do ever do a cam i can just put the stockers back on. was just trying to find something small i could try to make the car a little faster. thanks for the advice.
11-09-2005, 12:44 AM
#7
It is true that your cam choices will be fewer if you go to the 1.8 rockers.
I did install the crane/vhp 1.8 quick lift rockers on my stock cam and I also upgraded my springs and changed to ti retainers.
If you want to read about the crane rockers, go to the crane web site. The cranes are about $650 for rockers, pushrods, and guide plates, studs and poly locks. I have seen some of the crane 1.8s used for pretty low prices. You must use the crane pushrods (or another manufacturer's pushrods the same length) because they are shorter than stock.
Advantages of higher ratio rockers are that you can get increased lift w/o throwing the lifters higher and with the cranes your stock cam will act like a much more aggressive cam because the rocker starts off at 1.89 and comes back to 1.82.
Just go read their promotional/informational stuff, it'll make more sense. Vinci High Performance also has some good information on their web site. BYW, even the crane 1.7s would be an improvement over the stock rockers because thay have a faster ramp rate.
Good Luck!
I did install the crane/vhp 1.8 quick lift rockers on my stock cam and I also upgraded my springs and changed to ti retainers.
If you want to read about the crane rockers, go to the crane web site. The cranes are about $650 for rockers, pushrods, and guide plates, studs and poly locks. I have seen some of the crane 1.8s used for pretty low prices. You must use the crane pushrods (or another manufacturer's pushrods the same length) because they are shorter than stock.
Advantages of higher ratio rockers are that you can get increased lift w/o throwing the lifters higher and with the cranes your stock cam will act like a much more aggressive cam because the rocker starts off at 1.89 and comes back to 1.82.
Just go read their promotional/informational stuff, it'll make more sense. Vinci High Performance also has some good information on their web site. BYW, even the crane 1.7s would be an improvement over the stock rockers because thay have a faster ramp rate.
Good Luck!
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11-09-2005, 08:01 AM
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The Crane Quick-Lift 1.80 roller rockers are working great for me. 
Your cam choices are only limited regarding off-the-shelf cams. However, Comp, Crane, Cam Motion, etc, etc can build you a custom grind cam with any specs you want so, in reality, "cam choice" is a non-issue.
Your cam choices are only limited regarding off-the-shelf cams. However, Comp, Crane, Cam Motion, etc, etc can build you a custom grind cam with any specs you want so, in reality, "cam choice" is a non-issue.
11-09-2005, 12:49 PM
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Just to let you guys know PHR did an article on the SLP 1.85 rocker package. It included rockers, springs, titanium retainers, and pushrods. On a vette with 60,000 miles it made an additional 20 hp and 13 lb-trq. They loved the kit and recomended it too.
11-09-2005, 01:20 PM
#11
thanks for all the input guys. those crane variable lift rockers look really cool....but damn expensive. guys that are using those...how is the valve train noise? did it increase at all over stock?
ive been searching for rockers and i came across the slp 1.85's and i really like those. best i seen em for was $430. anywhere to get them cheaper?
i think for the money ill just go with a set of 1.85's...not sure which brand yet though...the slp ones look the best to me....total direct bolt on installation.
ive been searching for rockers and i came across the slp 1.85's and i really like those. best i seen em for was $430. anywhere to get them cheaper?
i think for the money ill just go with a set of 1.85's...not sure which brand yet though...the slp ones look the best to me....total direct bolt on installation.
11-09-2005, 02:54 PM
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Originally Posted by slow3hoe2
thanks for all the input guys. those crane variable lift rockers look really cool....but damn expensive. guys that are using those...how is the valve train noise? did it increase at all over stock?
11-09-2005, 05:01 PM
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Originally Posted by slow3hoe2
those crane variable lift rockers look really cool....but damn expensive. guys that are using those...how is the valve train noise? did it increase at all over stock?
ive been searching for rockers and i came across the slp 1.85's and i really like those. best i seen em for was $430. anywhere to get them cheaper?
i think for the money ill just go with a set of 1.85's...not sure which brand yet though...the slp ones look the best to me....total direct bolt on installation.
ive been searching for rockers and i came across the slp 1.85's and i really like those. best i seen em for was $430. anywhere to get them cheaper?
i think for the money ill just go with a set of 1.85's...not sure which brand yet though...the slp ones look the best to me....total direct bolt on installation.
My valvetrain also got quieter with the Crane rollers.
