Custom headers/Side pipes for BDR

[native1]

Thanks guys for your thoughts. Maybe I am getting ahead of myself to think 500rwhp is achievable with this set up. I thought the new pipes/headers would bring back some of the low end torque I lost due to the 950cfm carb. I was talked into the carb by local race shop paid 1000 dollars. Performs much smoother than the 770 street avenger it came with however, not as snappy. Should have done 750 or 850 cfm carb instead. My thoughts were, if I could get the air out quicker I could let more air in. Roush says 427srtw should be 535hp and 535tq with vic jr. and 770 carb. Thank for the advice.

[Slick61]

Originally Posted by native1

I thought the new pipes/headers would bring back some of the low end torque I lost due to the 950cfm carb. I was talked into the carb by local race shop paid 1000 dollars. Performs much smoother than the 770 street avenger it came with however, not as snappy. Should have done 750 or 850 cfm carb instead.

... funny you should mention that. My engine was originally running a DaVinci 950 cfm carb, but was then later switched to a 770 street avenger for better streetability. Tuning is a big factor, though... I dyno-tuned the car last fall & with the 770 carb on, the power/torque was nearly identical to running the 950 cfm carb, once it was re-jetted & properly dialed-in. Horsepower/torque losses were maybe 3-5 hp/tq MAX.