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Old 20th January 2014
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Default Gaterman Lifters Now Available from HAMMER PERFORMANCE

Just a heads-up, these high quality lifters are now available from HAMMER PERFORMANCE. Not only are they superb lifters, but they're reasonably priced as well



Four different models are available for XL's. Common features include:
  • 3D CAD Designed and CNC Machined for Maximum Accuracy
  • Heat Treated Chrome Alloy Steel Lifter Body for High Strength
  • Precision Machined and Heat Treated Internal Components
  • Check-ball Metering for Precise Control and Low Noise
  • 100% Select-fit Components for Precise Leakdown Rate
  • 100% Flow Checked Pushrod Socket for Precise Oil Metering
  • Hardened, Tempered Certified 52100 Steel Roller, Axle, Needles

The four available models are:
  • GP1023
    • High Performance for 00-05 XL's
    • Triple Oil Feeds for Robust Oil Supply and Quiet Operation
    • Single Locator Flat for Proper Orientation to Oil Supply
    • Extended Body and Locator Flat for Higher Lift Capability
    • Oil Feed on Locator Flat to Lubricate Guide Pin
    • Oil Feed to Roller Bearing Needles
    • Slower Bleed Rate for Quiet Operation
  • GP1021
    • Stock Replacement for 00-up XL's
    • Precision Staked Axle for Maximum Retention
  • GP1022
    • Stock Replacement for 91-99 XL's
    • Full-floating Roller Axle for Durabality
  • GP1020
    • High Performance for 86-90 XL's
    • Inner Race Style Roller Bearing for Increased Reliability
    • Orbital Riveted Axle Clamps Inner Race to Roller Slot
    • Superior Durability Compared to “Big Axle” Designs
    • Surpasses OEM 18523-86 and S&S® No.33-5341

Available Here
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Last edited by aswracing; 20th January 2014 at 03:46..
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  #2  
Old 20th January 2014
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I'm curious, what do the 00-06 models have in common that the GP1023 only fits them? Seems like an odd model range.
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Old 20th January 2014
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Default

Please explain why we would want to upgrade lifters. What is the advantage?
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Old 20th January 2014
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no love for 07 and up ?
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Old 20th January 2014
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Default

The GP1023 does not work with the anti-rotation device used on 06-up models. For one thing, it only has one tappet flat, and the anti-rotation device needs both flats.

However, the GP1021 works great on all 00-up XL's, in fact we have a set in the mule. It's a nice, high quality piece, and it's priced competitively with the factory lifter.

Ralph, high performance lifters are especially helpful as a piece of preventative maintenance when high spring pressures are used. The longer flats also allow higher lifts. The GP1023 is also lengthened on the top side for use with small base circle cams. However, that lengthening on the top is another reason it won't work in 06-up models.

Last edited by aswracing; 20th January 2014 at 03:47.. Reason: The ard device came out in '06, that's what happens when you're paying more attention to the game than what you're posting ;)
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Old 20th January 2014
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Default

I have used n6's, n8's, 551's, 536's and I would not know how to evaluate the base circles. Sounds like another lesson is necessary. Also, how long do stock lifters last and how do you know when the service life of a lifter is over?
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Old 20th January 2014
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Quote:
Originally Posted by aswracing View Post
Not only are they superb lifters, but they're reasonably priced as well
Reasonably priced? C'mon, they are half price of jims! Where were you a year ago.
Are they domestic made or China?
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Old 20th January 2014
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Ralph
The base circle is the smallest dimension of a cam lobe
If you measure the largest dimension of the lobe and subtract the smallest dimension you get the lobe lift.
Multiply that by the rocker ratio and you get the valve lift.
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Old 20th January 2014
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I wish they made high performance lifters for 91-99. Also, which lifters do XR-1200 engines use? What style anti-rotation do they have?
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  #10  
Old 10th February 2014
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Quote:
Originally Posted by A 4 liter V8 eater View Post
Also, which lifters do XR-1200 engines use? What style anti-rotation do they have?
Plastic ARD.
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