boatman747

I bought a set of Merlin intakes for a set of 540,s with gm heads . But to be installed I would have had to machine the ends to fit the heads cause of a knot onthe head. They didnt tell me this at CP Performance when I ordered them . So I used the big brodix APBA style. But it seams My torque curve could move up a bit if I used the Merlins cause the intake plenum is tapered bown smaller then opens back up . I am learning that bigger is not always better. Any opinions ?

Stormrider

Bigger is not always better.
I just got a set of Dart Iron Eagles for my 461cu.
The smaller ports should help out midrange alot too.

Vinny P

I recently went through the decision of bigger or smaller intake runners. I just built an NA 540 with AFR 315 cnc'ed heads. I tossed around the rectangular port vs oval port intake for a while. I ended up using a Dart oval port intake, which I gasket matched to my AFR heads. There was alot of material to remove at the exit of the intake runner. I went into the port about 1 1/2" to get a smooth transition. It seemed to work out well for me. I was happy with the dyno results.

RLW

It seems my torque curve could move up a bit if I used the Merlins cause the intake plenum is tapered down smaller then opens back up .

I am curious to know if there is any truth to the above statement.
Can anyone shed any light on this?

RedDog382

Boatman,

Sterling used Brodix on my 510 c.i. motors. Also had a friend gain 200-300 rpm over Dart intakes with Brodix on 502's. Should work well for you.