[Formulajones]

Originally Posted by Jay S

Shaker455 do you have any thoughts on the effect of the gap under the primaries on the carb signal? It seems backwards to me too have the divider drop on the primaries instead of the secondaries? I am running the drop on the primaries like the pictures show. But I wonder if I shouldn’t put the EGR plate under the carb back in, cover the EGR holes in the plate and cut down the divider on the secondaries?

I recall Rocky flowing the PB4. It did really well.

Jim Hand found decades ago that having that divider flush with the primaries of the carb was very beneficial to part throttle drivability (better carb signal), and then just cutting down the back portion of the divider. Not only just having the front of the divider flush with the primary of the carb, but also keeping the diameter of the primaries on the intake the same as the carb base. This turned out to be the best combo that Jim ran for many years.

That is generally how I modify all these intakes and it works exceptionally well, and easily supports over 500hp with either the iron or aluminum version.