360 on the dyno

Here is the old test that Ken Parkman did on the Air-Gap vs the Torker that he mentioned earlier in this thread. In this instance the Torker pulled ahead from around 4,500 RPM, but not really much in it.

jcisworthy wrote: I noticed.  I could have tried stagger jetting on the air gap but did not for this engine. I also could have added some jet to the torker which I did before that pull and it got the air fuels pretty close but still a little lean.   Increasing two jet sizes in the primary and three sizes on the pull before the one posted picked the engine up around 10 on both ends.   More jet and a spacer would probably have picked up 10-20 more hp and torque but there is no room for a spacer in this application and another 10 or so would not have made up the difference so I left it as it was. Time was running out because I had made an unexpected intake manifold change on the dyno.  The air gap dyno test was done a few months ago and the Offey / torker testing was a few days ago and weather conditions were very different.  The dyno has a correction factor for all conditions so the numbers should be good but a better test would have been to add the air gap the same day and test again.

Even though the Air Gap testing was done at a different time, all 3 manifolds were basically equal in horsepower at 2,500 rpm. From that point on to 5,500, the Air Gap picked up 40 horsepower on the Offy and 20 on the Torker. If you had tested the Air Gap on the same day, you wouldn't think it would be way down to the other 2 at 2,500, would you? Above that it pulled away.

It's apples to oranges comparison with the SBC test mule, but I thought the Engine Masters episode this week was interesting.  The Edelbrock AirGap (milled divider) vs. Weiand Airgap-like (solid plenum divider) was basically the same:

Did anyone note AFR's on the dyno sheets? It looks like the torker might have been a bit lean side but L/R measurements are similar. On the cut plenum divider Air Gap other side is lean other is rich.

I do like the shape of the air gap runners and the new prototype Edelbrock intake should be an excellent option. Looking forward to that one, hopefully soon.