100 cfm more with anular and downleg boosters can't beat AFR

It should be raw.
As far as what is happening at 3.3-3.5 seconds, that's what I'm talking about when I wrote I'm not sure what's happening up to 4700 rpm in 2nd gear. Looking at the rise in manifold vacuum from 31.5 to 33 sec, it seems most likely the secondaries aren't opening soon enough. The velocity past those big boosters is certainly very high. Also the primary PVCRs probably need to be smaller.

Look at this run with no secondaries.
View attachment 1715678588
We see a similar rise in vacuum once it goes to wide open throttle.
Also the AFR was 12.2 with 65 PMJ and on the track the AFR is around 12.3 up to 4700 using a 64 PMJ.


Interesting that you can use a 64 MJ on that 3310. I’ve been rather anti annular booster in 4150’s since I had such a bad experience with them a long time ago.

This is one of those things that I need to revisit. At this point, I think maybe any cold air intake, and especially something like a tunnel ram needs annular boosters.

I could be wrong on that though. I’m wrong. A lot.