Editing Valve train geometry
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===Chevy small block=== | ===Chevy small block=== | ||
*Stock hydraulic flat tappet SBC- 7.8” | *Stock hydraulic flat tappet SBC- 7.8” | ||
− | *SBC OEM hydraulic roller pushrods are 7.2” long. When using shorter | + | *SBC OEM hydraulic roller pushrods are 7.2” long. When using shorter V6 or L4 OEM roller lifters, start with 7.500" pushrods. |
*Crane retro hydraulic roller- 7.046" | *Crane retro hydraulic roller- 7.046" | ||
*Retrofit roller lifter pushrods are 7.300". | *Retrofit roller lifter pushrods are 7.300". | ||
===Pontiac V8=== | ===Pontiac V8=== | ||
− | Stock pushrod length- 9.130". | + | Stock pushrod length- 9.130". If using Chevy lifters- 9.290”. |
− | ==Things that can | + | ==Things that can effect pushrod length== |
A large number of variables are involved in determining the correct length pushrod for your application. Pushrod length is affected by any of the following: | A large number of variables are involved in determining the correct length pushrod for your application. Pushrod length is affected by any of the following: | ||
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==Mid lift theory of valve train geometry== | ==Mid lift theory of valve train geometry== | ||
− | + | *[http://www.aera.org/ep/downloads/ep10/EP04-2010_20-30.pdf Miller Mid-Lift] and rocker geometry article in the AERA (Automotive Engine Rebuilders Association) quarterly magazine '''''Engine Professional''''' | |
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;Hotrodders forum threads<nowiki>:</nowiki> | ;Hotrodders forum threads<nowiki>:</nowiki> | ||
*[http://www.hotrodders.com/forum/mid-lift-rockers-206836.html?highlight=MID+LIFT+MILLER Miller mid lift rocker theory] | *[http://www.hotrodders.com/forum/mid-lift-rockers-206836.html?highlight=MID+LIFT+MILLER Miller mid lift rocker theory] | ||
*[http://www.hotrodders.com/forum/rocker-arm-199353.html Rocker arm geometry] | *[http://www.hotrodders.com/forum/rocker-arm-199353.html Rocker arm geometry] | ||
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==Tools== | ==Tools== | ||
− | [[File:PUSH ROD LENGTH CHECKING TOOL | + | [[File:PUSH ROD LENGTH CHECKING TOOL 002.jpg|thumb|left|200px|Homemade adjustable pushrod length checking tool]] |
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− | + | Miller used a MID-LIFT G-TooL to measure for geometry. It is quite different from the other devises on the market like from Comp Cams and others that are used to estimate pushrod length. | |
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− | Miller | + | |
==Resources== | ==Resources== | ||
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*Circle track article ''[http://www.circletrack.com/techarticles/ctrp_0611_rocker_arm_valvetrain_geometry/viewall.html Rocker Arm Geometry And Valvetrain Alignment], A Detailed Explanation Of Valvetrain Alignment Goals'' by Bob Bolles, from February, 2009 CT mag | *Circle track article ''[http://www.circletrack.com/techarticles/ctrp_0611_rocker_arm_valvetrain_geometry/viewall.html Rocker Arm Geometry And Valvetrain Alignment], A Detailed Explanation Of Valvetrain Alignment Goals'' by Bob Bolles, from February, 2009 CT mag | ||
*Lunati article [http://www.lunatipower.com/Tech/Valvetrain/HowToVerifyValvetrainGeometry.aspx How to verify valve train geometry] | *Lunati article [http://www.lunatipower.com/Tech/Valvetrain/HowToVerifyValvetrainGeometry.aspx How to verify valve train geometry] | ||
+ | *Wiki page [http://www.crankshaftcoalition.com/wiki/Valve_train_points_to_check Valve train points to check] | ||
*Wiki page [http://www.crankshaftcoalition.com/wiki/Category:Adjust_valves Adjust valves]<br><br><br><br><br> | *Wiki page [http://www.crankshaftcoalition.com/wiki/Category:Adjust_valves Adjust valves]<br><br><br><br><br> | ||
[[Category:Engine]] | [[Category:Engine]] | ||
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[[Category:Cylinder head]] | [[Category:Cylinder head]] | ||
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