Rocker Arms
08-30-2004, 04:48 PM
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Rocker Arms Any real benefits and gains going from a stock rocker arm to a non ajustable roller? If so what can be expected power wise and what is a good brand to go with.
08-30-2004, 04:57 PM
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Less valvetrain noise,
Less friction
Better valve centering at point of V contact
Less binding
less twisting, none if they are shaft
perhaps a few more ponies?
Less chance of getting bearings in your oil pan
Less friction
Better valve centering at point of V contact
Less binding
less twisting, none if they are shaft
perhaps a few more ponies?
Less chance of getting bearings in your oil pan
08-30-2004, 06:47 PM
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well the VHP 1.89 accelerated lift rockers are the adjustable type. but here's dyno graphs anyway. tq peak isn't right there was a spike at the beginning of the run.
08-30-2004, 07:30 PM
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Originally Posted by 2002 ws6 CE
Any real benefits and gains going from a stock rocker arm to a non ajustable roller? If so what can be expected power wise and what is a good brand to go with.
08-30-2004, 07:44 PM
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[QUOTE=mrr23]well the VHP 1.89 accelerated lift rockers are the adjustable type. but here's dyno graphs anyway. tq peak isn't right there was a spike at the beginning of the run.
Going from the factory 1.7 ratio to a 1./9- you are going to get longer effective cam duration which could account for much of the power gains. Does anyone have any graphs of a back to back pull between the stockers and a set of aftermarket 1.7 rollers?
Thanks
Ben
Going from the factory 1.7 ratio to a 1./9- you are going to get longer effective cam duration which could account for much of the power gains. Does anyone have any graphs of a back to back pull between the stockers and a set of aftermarket 1.7 rollers?
Thanks
Ben
08-30-2004, 09:54 PM
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PZ hit it right on the money. I just picked up a set of slightly used YT 1.7 shaft mount roller tip roller rockers. I expect very little for hp gains(might be a few peak, but I won't know, since they'll be installed same time as cam install, 231/237). What I do expect is strengthened drivetrain. More rigid. Definitely more reliable. My car has 62k miles on it, and putting a cam in it, I did not want to risk finding a **** load of bearings in my oil pan when I go to put heads on her in the winter/early spring. This should definitely help me avoid that. Pick you up a set of used rockers, I got this set and they could pass for new. They apparently have 2k miles on them...but you couldn't tell. Its a good insurance policy. Between these, the chromemoly pushrods, and PP Gold Dual springs...my valvetrain will be good to go. Then I'll just have stock lifters!!
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08-31-2004, 08:24 AM
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Originally Posted by PREDATOR-Z
Less valvetrain noise,
Less friction
Better valve centering at point of V contact
Less binding
less twisting, none if they are shaft
perhaps a few more ponies?
Less chance of getting bearings in your oil pan
Less friction
Better valve centering at point of V contact
Less binding
less twisting, none if they are shaft
perhaps a few more ponies?
Less chance of getting bearings in your oil pan
They are purty
08-31-2004, 01:24 PM
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Not sure you will see any gains going with the 1.7 rollers. Mostly piece of mind. I gained 15rwhp with the 1.8 HS rockers (bought them from Nasty). And then 21 more when I stuck a Hot Cam under them!
08-31-2004, 05:02 PM
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I just finished installing mine (HS 1.8s). On my stock cam, the RRs were also pretty quiet (quieter than the stock rockers). I'm scheduled for a dyno in 2 weeks, I'm curious to see if I picked up any decent peak hp.
08-31-2004, 11:46 PM
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Originally Posted by WAHUSKER
Not sure you will see any gains going with the 1.7 rollers. Mostly piece of mind. I gained 15rwhp with the 1.8 HS rockers (bought them from Nasty). And then 21 more when I stuck a Hot Cam under them!
