Hey guys, I swear im about as good at finding stuff on this site as using the yellow pages . I cant seem to find out if the L98 came with roller rockers or not. So question being what rockers are on her and then, if I added 1.6 Roller Rockers would I actually bring anymore horsepower into play? I know there will be a little from reduced friction in the engine but will the extra lift help any? And then will my stock springs be okay? Im not to sure if I will cause bind or pull the stud, from what I was reading it is AND isnt.

Thanks guys.

 

Don't expect a lot but yes you'll get some benifit from the increased lift as well as the reduced friction. Stock are stamped steel 1.5:1 rockers.

 

How much of a difference is there?????? 10 HP maybe?????? What about throtle response?? thanks, Tom

 

Thats my question (other than the rocker ? thank you btw). Harland sharp (i believe) advertises 10-40! hp gain in the summit catalog so to me that means 5-20 hp, and probably only more than 10 if you have a HUGE cam and your making tons of friction. But i am willing to put money on throttle responce for sure, I mean its not a tuff equasion to figure out: Steel rockers = Heavy, Aluminum Rockers = Light. And according to Smokey Yunik there is hp to be seen from reducing valve train weight, with a 'closer to the valve the better' rule. So maybe when im in there I will upgrade to Titanium retainers while im at it . Pull 20 Hp out of my rear end and no one will notice, until I hit the gas .

 

The effect of switching to 1.6 will probably be a multiplier effect --
minimal (10 hp) for stock, to greater (?? hp) for other mods.
But keep in mind some other factors:
Putting 1.6's onto press-in studs is risky.
Stock center-bolt valve covers can have clearance problems with
some full roller's of either ratio.

Good luck.

 

Hey oong distance travler, got the engine compartment all cleaned up, thanks to you..No more Air tubes..........LOL....Thanks for the info on 1.6's......Tom