SBM Dual Plane Intake vs Single Plane Intake Dyno Results on a Rowdy 408" Stroker

For a fun car, I'd take the Victor every time. From 4700rpm on up, the Victor is equal or above the AG. But I also take every opportunity to shift well north of 6k.

Shifting a 4spd at 6550, the revs will never drop under 4700 with each gearchange. No need to take it to 7500, but the Victor was still making power at 7k! Shift at 7 and the gearchange never drops below 5k, and from 5-5400 is where the Victor really stomps the AG setup. With 3.91 gears and a 26" tire, 4700 rpm is about 35mph in 1st. Neither car is going to have traction on the 'street' anyway but the lower torque is going to make managing initial traction a bit easier - from 35mph on up it's all over though, the Victor will eat that AG.

I've also gotten to experience the difference first-hand. My 408 wore an AG at first, and later I swapped to a ported Victor340 (TF heads, Fitech EFI, 4spd, hooker headers, 2.5" x-pipe exhaust thru mufflers out the back). With the AG, it really was not rev happy but had plenty of grunt. It felt labored shifting at 6500, I typically shifted closer to 6k. With the Victor, I've got traction problems (265/50/15 and a 3.91 rear) all the way through 3rd on the street - something the AG never exhibited. I cruise around 2500-3500 rpm, and the Victor shows no bad habits in that range, so no change for me when tooling about. Under 3k there's a slight loss of torque, but getting to and past 3k is ridiculously quick. Typical shifts are now closer to 6500, but it's still pulling as I close in on 7k (rev limit at 7200).

The dual plane would be fine in my pickup though, and that's where mine is destined to go.