Changing rocker arm ratio

Shaky93

New member
So I have the opportunity to purchase a set of very nice roller rockers for my triple turbo 12v DPC build for a pretty good price, but they are 1.8, I was planning on going to roller rockers to fight rocker arm deflection anyways but in 1.6 maybe 1.7. I'm using a 194/220 cam, head flows PLENTY, and I have more than enough valve relief to accommodate the extra lift, my question is what will the higher rocker ratio do to the overall drive ability of the engine? Beings it needs to be somewhat streetable to finish well in all the events. I've got no experience messing with rocker arm ratios just looking for a little bit of advice. Thank you!

Here's What we're working with
c60754f5f97015a074294e695dfb10bc.jpg

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I believe the LSA is going to be key, on a forced induction motor...the overlap, if too great can cause power loss.

What is the LSA of said cam ?
 
Just my $.02, but you need to figure you max lift with those rockers, and you need to know your flow numbers of your head at various lifts,

Aftermarket heads are not so bad, but oem cast 12v heads had a wall where with too much lift they actually lost cfm/power. From what I remember was somewhere in the. 600" lift range.
 
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