What are the largest ratio rockers without changing cam?

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Cragrobbo
Posts: 96
Joined: Sat Nov 09, 2013 1:32 pm

What are the largest ratio rockers without changing cam?

Post by Cragrobbo »

Hey guys.
I was hoping to get a bit more lift from my valves without having to split my case again, I have a 110 Cam at the mo - I haven't checked my current rockers but I was wondering what is the largest ratio rocker I can get in?
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Marc
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Joined: Thu May 23, 2002 12:01 am

Re: What are the largest ratio rockers without changing cam?

Post by Marc »

The Engle W series cams were designed when the only ratios out there were 1:1 and 1.1:1 - but they left enough safety margin in the ramp design that they can tolerate a 1.25:1.
Some have run higher but not with Engle's blessing.
jrandy
Posts: 498
Joined: Wed Oct 03, 2007 10:39 pm

Re: What are the largest ratio rockers without changing cam?

Post by jrandy »

Some guys run 1.4s on 110 cams, but not for long. Mostly hot rod offroad hill climbers where regular tear downs are expected.

No matter what rocker ratio, you need to run HD pushrods with a 110.
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