Horsepower change?

gregsdart said

I talked to Wilson manifolds today about the 3x intake. They think it could help to rework the plenum. I asked about POTENTIAL HP gains knowing that there is no way to know results with mechanical injection. He said MAYBE 20 TO 25 HP GAINS due to fixing the plenum area.
The DLC coated pins ought to help. Vacuum won't hurt them.
I assume i may see 20 hp just from higher vacuum.

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Yes and yes. Even though you’ll have a relatively dry intake, the cloverleaf top is a power loser. It been awhile since I’ve ad my hands on one of those intakes but I’m pretty sure there are two dividers that have a hook at the end of them and that needs to be squared up. I also remember the dividers protruding quite a bit into the plenum. If that’s the case you should shorten all the dividers up some too. More vacuum with your ring pack will certainly make more power. Why was the vacuum so low on the dyno?