2056 L - Jet Build advise request Options

[pnewman]

Time to rebuild my stock 1.8 L Jet

Keeping the L Jet.

Any recommendations with the 2056 build in regards to the L Jet
-such as cam choice and source etc.
-do's / don'ts from your experience.
-links to like build threads.

Thanks in advance.
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[r_towle]

What is the difference is head flow between the stock heads and the RS heads?

Curious how much change is occurring....

[Jake Raby]

What is the difference is head flow between the stock heads and the RS heads?

Curious how much change is occurring....

On a 2056, about 15HP worth of difference back to back.

On the flow bench the peak flow is very similar, but where the flow peaks at is different and low lift flow and chamber filling is dramatically increased.

The biggest difference is the altered port flow margins between intake and exhaust ports. Remember, peak flow mans a lot less than where the flow is made and what intake : exhaust flow margins are.

These port flow margins work really well with the split duration cams that I developed as part of many engine combinations.

Here's a graph that was handy from the 2006 offerings, the RS is more refined now than this, but this is the general idea. Remember, this is dry flow data and doesn't show swirl, or tumble, or port velocity. But we have all that data as well.
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This post has been edited by Jake Raby: Nov 13 2014, 11:04 PM