Lower intake porting

[beatrod]

Stinger, i bought a terribly gutted upper intake that i have since shortened and still have a little port fixing to do. The lower was untouched. Question is, when the lower gets ported, are the runners ported or just kinda "bell mouthed" at the flanges? Also, i have a factory short block, boport stage 3 head and 2.5 cam, garret t04e 60 trim with .63, MS3X and 80lbs injectors, and the supporting bits for all of it. Plan to run pump gas and get somewhere in the ballpark of 400. The car is just a street car that im trying to make the 400 decently reliable but not a daily driver. I dont need a ton down low as im not driving it daily but would still like SOMETHING before boost hits. Would it be to much restriction for my goal if i opened the lower intake ports up at the flanges only to smoothen flow? Make the top flange ports kind of squared running into the runners and port matched the head? The car currently has a 4.10 gear in it, but im thinking maybe a 3.73 or 3.55 as first is already unusable at 2?? Hp.. Thanks for input

[Stinger]

With a stage 3 head you'll be restricting flow significantly if you just bellmouth it at both ends.

[beatrod]

Yea im worried about that.. Was figuring itd help low rpm torque. Thats the challenge with a 4 cylinder though i guess though.. Torque or power, cant choose both lol suppose il just get a ported one and retard the cam a bit to gain gain back if needed. Is the loss really so nociable at about where im shooting for?

[Stinger]

Port length via Gutting/not gutting the upper is much more instrumental in tq production than port diameter. Regardless, your engine with ported head and 2.5 cam is going to make more tq than it did in stock form so it should not be a concern. As you said, you can move cam timing around some. If you adjust it so peak HP is around 6300-6500 then you'll have plenty of tq as well.