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Discussion Starter · #1 ·
Doing a 521 on the heads I have they have 1.73 1.80 but can't rem which went were on intake or exh. I know the intake has the lash caps.
The cam is around 670 lift are y'all guys familiar with this? Thanks
 

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Doing a 521 on the heads I have they have 1.73 1.80 but can't rem which went were on intake or exh. I know the intake has the lash caps.
The cam is around 670 lift are y'all guys familiar with this? Thanks


Higher ratio rockers on the exhaust side.
This is a way to mitigate when using a cam short on exhaust duration.








Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
ParklandAutoMachine.com
R-H-P.biz
"Parkland Performance Auto Machine" Formerly RHP
(253)-988-6648
Parkland Auto Machine
 

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Discussion Starter · #3 ·
Mad Porter thanks I assume they went on the exhaust side but wasn't sure. I thought both rockers were the same ratio when remove but I was wrong lol being the lash caps on the intake I figure that the ex rocker was 1.80. will the lash cap bring the lift up as well on the intake side.
 

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Mad Porter thanks I assume they went on the exhaust side but wasn't sure. I thought both rockers were the same ratio when remove but I was wrong lol being the lash caps on the intake I figure that the ex rocker was 1.80. will the lash cap bring the lift up as well on the intake side.
The lash cap is there to help with geometry and spring clearance issues.
NO effect on lift.







Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
ParklandAutoMachine.com
R-H-P.biz
"Parkland Performance Auto Machine" Formerly RHP
(253)-988-6648
Parkland Auto Machine
 

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760 Posts
Discussion Starter · #5 ·
Ok gotcha so the valve settings don't change either?
If not I set to specs on card just want to go back like it was. It ran strong for a street headed motor 1/8 mile 5.70 on motor 3000# stang
 
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