Port Matching Intake
 

I have my new Brodix HV 2001 intakes for my 509's. I'm curious what you guys thing about port matching the intakes. I've been digging into this that past few nights and general consensus from chevelles.com, yellow bullet, speed talk, etc is that you gain nothing by doing it. Seems that maybe if your spinning 7k, you might get a tiny gain (2-3 hp) but in general you will stay the same or maybe even lose power. The ports on my new intakes are around .10" +/- .05 narrower and the floors are the same amount higher than compared to the port matched runners on my Dart intakes. On the other forums, the general thought is if its less than an 1/8" leave it, and that there actually may be more of a benefit to the different size runners. That is, creating more turbulence, and greater velocity into the head. Before I spend the time port matching these, does anyone have an opinion on this? As of right now, I'm really leaning toward leaving them as they are.

The intakes you took off originally were off a LOT more than that.
If they are that close I probably wouldn't do anything either.
The dart intakes have smaller runners than the heads.

i have always believed it is better for the intake manifold port to be slightly smaller than the head,a pretty smart guy told me that years ago.

Are you exclusively fresh h20?

I agree about Dart intakes. Their as cast ports are really small and you pretty much have to do some work to them. Tomorrow I'm finally going to be able to set the intakes on the engines and I'll inspect everything with a scope. Unless I find something that doesn't line up right, I'm going to run them as cast. The actual quality of the castings are excellent. Much cleaner than other brands that I've had in the past.

Yes, 100% freshwater.

I have darts on a pair of tall decks, bought them used at a good price but required way to much work. I would never buy them again. i hear brodix and profiler are a lot better intakes to start. Darts my head porter match ported them and did some runner work, dyno engine then sent it back to him and he cut out cloverleaf design and blended it in, back on dyno and gained 27hp 23 torque.

So you gained 27 hp with the modified plenum work vs the stock design? I would be interested to see as cast vs. blended. I know with the Darts I had on my 454's they had a fair amount of casting flash in the runners and plenum, so I'm sure there would power to be gained by working on them.

I originally was going to go with the Sniper Jr intake but I was told they're not very good. Seems some guys love them and other don't. I know that JimV is not a fan of that intake. He likes the design of the Brodix HV so that's what I went with.

That's what it gained just from work under where the carb sits removing the cloverleaf, have no idea what port matching and runner work did. It is on 865hp 808tq nat aspirated so gains would be less in an engine with less air flowing but I think all those small gains can add up to 40 to 100hp. [ATTACH=CONFIG]567117[/ATTACH]

Something else that was cool is I gained 20 from velocity stack vs nothing at all, [ATTACH=CONFIG]567118[/ATTACH][ATTACH=CONFIG]567119[/ATTACH][ATTACH=CONFIG]567120[/ATTACH]