 Tell me about swapping to hydraulic lifters |
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| JeffBowlsby |
 Jun 3 2016, 04:28 PM
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#1
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914 Wiring Harnesses & Beekeeper  Group: Members Posts: 8,907 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
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I hear they are done to eliminate valve adjustments on a T4 motor.
Other pros/cons? Is there machining required or are they drop in and thus reversible? |
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| Dave_Darling |
Jun 3 2016, 11:04 PM
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#2
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914 Idiot Group: Members Posts: 15,161 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Ramp rates on the cam have to be set up for the hydro lifters, so you can't use a stock cam.
The valves still have to be adjusted, but if you drive the car regularly you won't have to do it as often as with solid lifters. There is some argument about exactly how much pre-load to use on the valve adjusters when you have hydro lifters. Generally the hydro lifter setups will impact high-RPM power. Supposedly, if you do a solid-lifter adjustment on a hydro motor, you can kill it. I'm not sure I buy it, but someone who has dealt with more motors than I have insisted that had happened to him. --DD |
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Posts in this topic
Jeff Bowlsby Tell me about swapping to hydraulic lifters Jun 3 2016, 04:28 PM
mepstein You don't do it on a 914 motor since you want ... Jun 3 2016, 04:46 PM MichaelB I am not the expert opinion you are looking for bu... Jun 3 2016, 05:04 PM Bleyseng
I hear they are done to eliminate valve adjustmen... Jun 3 2016, 05:12 PM larryM https://www.google.com/search?q=914+hydraul...-8... Jun 3 2016, 10:43 PM rhodyguy Very annoying when the lifters have to pump up aft... Jun 4 2016, 08:17 AM
r_towle It works, not optimum but it can be a dropped in t... Jun 4 2016, 09:19 PM |
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