91 camaro racer

iTrader: (2)

i just got done tearing my holley 4160 600cfm vac sec. carb down for a rebuild. is there any tricks that you guys have done to your holley? i was thinking about grinding the throttle shafts to gain some airflow. other then that what else can i do to increase the performance?

redneckjoe

heres a few ideas you might consider;

instead of grinding the throttle shaft, try a stub stack.
http://www.summitracing.com/parts/knn-85-0200/overview/

a 50cc accelerater pump will help give you more shot.
http://www.summitracing.com/parts/hly-20-11/overview/

then you'll want to tune the squirter for the 50cc pump. IDK what size you'll need? its trial and tune.
http://www.summitracing.com/parts/hly-121-137/overview/
theres also a hollow discharge nozzle screw you can get.

i like the adjustable vacuum secondaries. really hate taking the housing apart. with this unit, its just a twist of a screw. wont take but a few blasts up and down the road to get your secondaries dialed in.
http://www.summitracing.com/parts/qft-63-1/overview/

91 camaro racer

iTrader: (2)

i guess i was more talking about ways to increase airflow going through the carb. but anything will help.

i already have the stubstack to smooth out the airflow, and i will be installing the quick change secondary springs during the rebuild.

i will have to think about the 50cc squirter...thanks for the idea!