I would disagree with this statement. Buy the intake from the right person and it WILL pickup power. The difference between a full ported cast intake done by someone who knows what they are doing and a sheet metal intake done by a qualified person who knows what they are doing will pickup power period......Been down this road a number of times.

The one thing I have seen MANY times with ported cast intakes is folks doing them who have no clue what they are doing, or what they are trying to accomplish.

The coolest porting / fabricating work is what they do in FAST.

Take the upper plenum of a dual plane and block it off completely from the plenum, then completely Gut the floor out of the lower plenum and build a new larger floor from underneath...then join all 8 port runners and you build a Stealth big volume single plane manifold, the big runners also now have a huge open plenum and it all looks stock.

Coat the bottom of the "inverted single plane" with high temp themal barrier ceramic coating to keep the oil heat away from it. All it takes is ingenuity and cubic dollars!

Sounds cool, have any pics?

I did mine a little different than what Wise describes, I think the floor was too high. Dyno testing proved that the plenum was too small. Still, it picked up over 35 horse compared to the Vanke Mod.

Pretty wild. So that ended up as a big volume single plane intake but it still looks like a dual plane from the outside? I had not seen that before but it makes sense.

Yes, that's the gist of it. It was a really fun project, but it was purely experimental- there was no way to know if it would work until it was done and tested. Thankfully it worked out. I used 2 intakes that had already had some butchery so I got them fairly reasonable on ebay.

This gives me some ideas. I already cut the bottom out of an intake, but my issue is I have a cast iron intake, what you are talking about is a lot easier to do with an aluminum intake.

i wonder how something like that would work on a CH4B intake.

From the Facebook Factory Appearing site

I saw this on there...the poster also said it was currently used as a door stop.

As for Super Stock...the multi carb guys are using sheet metal, single carb are still starting with cast intakes from what I've seen. Usually Victors.

Oh Yeah I read that too, but I think the concept is sneaky and if it's executed correctly it could work....or possibly does work and we don't even know it.

but LSP asked about pictures....so. If nothing else I hope the pics of the 'doorstop' help people understand the stealthy concept.

There's maybe only a few combos that would benefit from it...like a stroked 71-72 340 TQ or something else with a tall deck and a deep valley...maybe a stroked 455 olds or Pontiac.

You could Conceivably model a known "good" single plane and copy its cross sectional areas (as best as you can) but you'll still lose something in the obviously poor approach angles to the heads.

It would be interesting to make a very thin mold of just the very top outside of a factory intake..... just to see what is conceivable to fit underneath it.

to stick with a dual plane you would have to get the 4 common paired plenums as large as possible because they feed the individual runners and with a bit of taper toward the carb they can act like 2 larger "main" plenums, the biggest restriction are the inevitable acute angles mainly to the inboard 3-4-5-6 cylinders.

That is what I've seen too. The sheet metal stuff doesn't seem to work very well for single carb. Works great for dual carbs. I think it is because the curved runners are too hard to make in sheet metal.

It wasn't that long ago that I came across pics of a single-plane sheetmetal intake for the first time and didn't realize anyone even made them

I missed that one , I'll have to go back to find it.

The pics were posted in the comments on the low deck intake post over the weekend.

Single 4 "box ram" style intake work VERY well. They dont make any cast ones for a Mopar but a sheetmetal version works very well. We have a few in the NA ranks and you will find them in comp as well.

Thanks , that explains why I couldn't find them

Rhett posted a thread last year on FABO about the whole build process involved with his SB FAST intake.

Time flies….. it was a few years ago……..

https://www.forabodiesonly.com/mopa...lass-and-needed-a-winter-project.480041/

Nice work! Thanks for sharing.

I wonder if the people who set up F.A.S.T. had any idea the extent to which people would go to build these things... and if it's even in the spirit of the original rules