Re: 0.800 lift on EZ heads
[Re: JohnRR]
#51513
01/20/08 03:58 AM
01/20/08 03:58 AM
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Joined: Feb 2007
Posts: 633 NY/NJ
DV8
mopar addict
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mopar addict
Joined: Feb 2007
Posts: 633
NY/NJ
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Whoaaa boy! That is steep! What ratio rocker are you using?
~S~
"The function of man is to live, not exist..."
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Re: 0.800 lift on EZ heads
[Re: 67_Satellite]
#51518
01/20/08 02:17 PM
01/20/08 02:17 PM
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Joined: Apr 2004
Posts: 1,981 SE Michigan
TS3303
top fuel
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top fuel
Joined: Apr 2004
Posts: 1,981
SE Michigan
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Quote:
O.K., maybe I missed a previous post or something,but why so much lift? Is this just an exercise to find out how much is possible?
is this an allout max horsepower headsup type engine?
IMO opening the valve that far past the useable range of the intake port is a waste of energy, reduces durability, increases wear on the valve train. not worth the extra 2-5hp that you might get. springs will have a very short life.
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Re: 0.800 lift on EZ heads
[Re: AndyF]
#51522
01/26/08 10:24 PM
01/26/08 10:24 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Andy, is there enough flow at .800 to make it worth your while? I would have figured it stalled by then Its surprising that the tool is strong enough to pop the springs off, I have the same and on my W-9 I have to pull 4 springs per head to get to the head studs
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Re: 0.800 lift on EZ heads
[Re: AndyF]
#51524
01/27/08 06:58 PM
01/27/08 06:58 PM
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Joined: Aug 2003
Posts: 43,223 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,223
Bend,OR USA
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I think a lot of people forget that a running motor never sees the valve held open very long like a flow bench measure flow at. As Andy said when you lift the valve open more the motor has the opportunity to suck in more air than it does at a lower valve lift for the same duration Now when you introduce valve train components like the Jessel rocker system, single tapered pushrods and the exotic valve materials and super good valve springs why not bump the valves open more Isn't hopping up a motor basically about getting more air and fuel into the motor so it will make more power.(IE: heat via a controlled explosion)
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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