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1.8 Rockers, can you use them with stock springs?

L

lafenatu

New member
I am curious about using stock heads with a 1.8 pedestal rocker and stock valve springs.

Does anybody experience valve float? The car has 112K miles on it as we speak.

Thanks.

-Rob
 


My 1.8 roller rockers are on stock springs and i have 40K on my motor, my L36 had 68k with ZZP ER rockers and that was on stock springs too. you should be fine
 
3800 guys like to reinvent the wheel a million times, ive never had said valve float, my m90 never valve floated and my turbo doesn't float. changing the springs turns into the timing chain dampner to wear more, so why cause problems? the OP is gonna do what he wants, ive had my car for 6 years with 3 different setups and i never had a valve float issue
 


I have 1.84s and stock springs and have for almost 4 years now... they do just fine...

you will be more than fine as long as you dont up your shift points too high...
 
Just think about it...you have 112k on those springs and we all know that heat deteriates spring tension, what do you think?
 


How do you figure that you get timing chain tensioner wear with upping valve sping pressures?
 
Last edited by a moderator:
Because of the higher spring rate you're wearing out the tensioner.
 
Last edited by a moderator:
You can run 1.8 and 1.9 ratio rocker arms with complerely stock heads until your shift points reach around 6000 RPMS. That is the ballpark for where valve float can happen.

ZZPerformance.com said:
These work with all stock or aftermarket pushrods, lifters, springs, retainers. They will not work with aftermarket cams. Aftermarket springs are recommended for shift points higher than 6000.
Click to expand...

ZZPerformance - 1.9 Ratio Modified Rockers #ZZ-19MR
 


Dragon1972 said:
There is no added pressure to the tensioner!!!
Click to expand...


So...... you've inspected timing chain dampeners after using 90# springs? It's not like this is the first time this has come up. Many individuals and vendors have noted more wear on the timing chain dampener due to springs with higher spring rate than stock. That's why a lot of people chose 105# springs over the 90's. 90's have stockish seat pressure but higher spring rate. 105's have stockish spring rate but higher seat pressure.
 
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