402 vs 416
I have as cast Trickflow 220cc heads. I'm thinking along the lines of a 236/238 600ish cam. I have an A4. Want as much power as I can get while still ensuring I don't get any surging or bucking with the cam. I have to maintain good street manners.
Not sure I believe the 1.27/ci. That would mean I'd gain 50whp going from 364 to 403. I think most only gain around 17 with the same jump?
Go to Vengeance to get it tune. They take as long as it takes to make sure that the car is right.
I ordered a 416 through Va Speed. It was a hard choice and I had to do a lot of research to come to that decision. But I finally placed the order.
What intake?
only way i can see this happening is both motors with the same camshaft.
the inches will "eat" the cam, making it have better manners so to speak.
it can be 4 inches or 900 inches. i dont see the light in your statement.
But how much longer can a stroke possibly be with any stroke/bore combo between a 402 and a 416...not much.
The Best V8 Stories One Small Block at Time
I have as cast Trickflow 220cc heads. I'm thinking along the lines of a 236/238 600ish cam. I have an A4. Want as much power as I can get while still ensuring I don't get any surging or bucking with the cam. I have to maintain good street manners.
Not sure I believe the 1.27/ci. That would mean I'd gain 50whp going from 364 to 403. I think most only gain around 17 with the same jump?
I'd like to see that car on another dyno. 427 C6 Z06's with ported LS7 heads, cam upgrades and exhaust work and a tune are having trouble making 570 RWHP. There are some that I've seen over 600, but most are in that 570-580 area.

The additional bore will help with any valve shrouding you may have depending on what heads you run.
Go with the 416.
402 = 4 bore x 4 stroke
~416 (415) = 4 bore x 4.125 stroke
All else being equal, the 416 will make more torque.
So...............
I'd run the 416 over the LS2 based 402. It'll unshroud the valves more and allow a head like the TFS235 to make a little more power.
A mid 230s duration cam would be pretty mild in that size motor. A cam that would act "cammed" but still be extremely livable would be a mid 240s duration cam and would perform better.







