super victor on a mild combo
Hi guys. Just wondering if any of you have some insight as to whether it would be worthwhile to swap intake manifolds. This combo is a little unconventional and what I'd like to do is soften the 60 ft just a bit and gain some MPH on the big end.
I like to cruise this car on the highway (occasional street race) and often drive it to the track (over 100 miles each way) so I don't want to give up the 3.08 gears. The new vette would blow my doors off in a street race. I'd like to close the gap a bit.
In the 1/4 mile, I never hit 3rd. I shift into 2nd (around 6600 rpm) at 70 MPH and cross the stripe (around 6800) in 2nd. The car sixty foots in the low 1.7's. I have to roll into the throttle to maintain traction otherwise I smoke the Nittos. Perhaps with a new set of Mickeys I could hit it harder and get into the 1.6s, but I'd hate to blow up the 10 bolt rear. So a soft launch is ok with me. I love the fact that the car runs 11.70's but I'd like to see more mph. It currently goes 116mph, which is decent but I'd love to see more like 120.
Here is the current combo:
small chevy 423 (4.165 bore and 3.875 stroke) with 10.25 compression.
cylinder quench is .049. I could close that to .037 with a set of Cometic gaskets and get a .3 compression bump.
Brodix dragon slayer heads (300 cfm). Beehive springs and titanium retainers.
custom hyd roller 240/243 with .600 lift (1.6 ratio). 110 sep.
Hooker super comp headers 1 3/4 primaries, 3 inch collector
Pro-Systems 840 carb
Edelbrock Performer RPM intake (not the air-gap).
11 inch converter (3000 stall) by Turbo Action.
Factory 3.08 gears (use only 1st and 2nd in the 1/4 mile).
Engine pulls to 7k. I feel that the power seems to flatten around 6200 (probably from the dual plane intake) and fall off after 6600 (perhaps cam peaking).
From what I've read, a small block of this size, with its tremendous piston speed needs adequate cross-sectional area (CSA) to hit it's potential. I'm certain the Performer RPM is holding things back in that department. Perhaps a Wilson ported Super Victor would help things out... Thoughts/comments?
1966 Chevelle, mild SBC stroker, factory 10 bolt, 3.08 gears, column shift, Performer RPM intake. 11.70's at 116 mph through 2 1/2 exhaust.