360 questions

rumblefish360 said
Wow! Bro! Hold on a second here! Not trying to pick you a part here but IMO, your a bit all over the place. Let start with the numeric figures of torque you listed stating with 1.2 & then 1.5 and back down to 1.

At 1 ft. Lbs. per cubic inch is roughly a very mild came upgrade and or headers like in IQ52's low compression 360 thread. Very mild build with excellent results for the intended package.

This is a far cry away when you start doing the math.

360 @ 1 lbs/TQ per cube equals 360 of course.
[email protected] = 432
[email protected] = 540

I think that saying adding a large port head is vauge. What is a large port head and when did that come into the picture of possible with the OE poster wanting to possibly try and make use of sealing the STOCK HEAD out for a smaller 318 head?

He is talking about his 360.

Heck! He doesn't even know what the cam is and your advising what about it? Don't do large cams? What?!?!

I'm not advising him anything just giving info so he can make up his own mind.

Why I was talking about lbs-ft per cubic inch and head flow and such was cause a lot of people have it in there heads that small ports and small cams and small carbs make torque and I believe that's not true. Stock engines make about 1:1 torque per cubic inch and torque per cubic inch goes up as you add more flow with matched cam carb heads etc... but of course depending on cubic inch it will be further up the rpm scale. I was just trying to show small ports don't necessarily build more torque especially when adding rpm.

Now for 318 heads which were really designed for the 273 size engine. While the ports aren't overly small and poor flowing and may pick up a couple of mpg's and pick up a few lbs-ft under 2000 or so rpm . The bump in CR will probably also help. If he's OK with shrinking the power band and losing some mid to high rpm power then go for it.

But really a small to mid size cam 4bbl exhaust and stock 360 heads will give up little down low while adding greatly to the engines power and even though he stated he's not building a race car but most of us like a reasonable amount of power ĺook at the power ratings of most new car.
Cause technically a car doesn't need more than 70 hp anything over that is a performance engine :)