Here are the specs
350 SBC 4 bolt main
.040 overbore
76CC heads from 74-80
9 to 1 compression
Performer RPM intake manifold
Hugger headers
manual trani
Currently I have a 600cc holley single pumper 4 brl that seems to run OK, but just doesnt have the power or response that I am looking for. I used to have a throttle body fuel injection setup (Holley) that made substantially more power and torque and performed flawlessly until the ECU died and I had to go back to carbs.
I have had the carbs dyno tuned a couple of times in the past by a very good tuner extremely familar with holleys and I am not happy with them, The power breaks up substantially in the upper rpm's and the torque down low is just not what it should be (half what it should be..). The latest dyno a year ago was 235rwhp and 295rwtq (Power valve changed and some other stuff, still broke up in top end and just felt sloppy). The same dyno 4 years prior was 245rwhp and 275rwtq with about 25% drivetrain loss. When fuel injection was used it had 50more hp and 100 more tq to my butt dyno which has been very accurate to date
Im looking for a carb that will let me tune it better and fit my performance needs better.
I do road racing very occasionally but mostly mountain runs and drift days in the car, but it is 90% a street car.
I was thinking a holley 670 street avenger, can anyone confirm this would be good?
350 SBC 4 bolt main
.040 overbore
76CC heads from 74-80
9 to 1 compression
Performer RPM intake manifold
Hugger headers
manual trani
Currently I have a 600cc holley single pumper 4 brl that seems to run OK, but just doesnt have the power or response that I am looking for. I used to have a throttle body fuel injection setup (Holley) that made substantially more power and torque and performed flawlessly until the ECU died and I had to go back to carbs.
I have had the carbs dyno tuned a couple of times in the past by a very good tuner extremely familar with holleys and I am not happy with them, The power breaks up substantially in the upper rpm's and the torque down low is just not what it should be (half what it should be..). The latest dyno a year ago was 235rwhp and 295rwtq (Power valve changed and some other stuff, still broke up in top end and just felt sloppy). The same dyno 4 years prior was 245rwhp and 275rwtq with about 25% drivetrain loss. When fuel injection was used it had 50more hp and 100 more tq to my butt dyno which has been very accurate to date
Im looking for a carb that will let me tune it better and fit my performance needs better.
I do road racing very occasionally but mostly mountain runs and drift days in the car, but it is 90% a street car.
I was thinking a holley 670 street avenger, can anyone confirm this would be good?