talking heads

have a 472 a429 head victor solid flat 258 258 .615 .615 10.2 comp. with 1 3/4 header 3" ex. would larger header help

smallest I ever ran on a BBF was a 2", we run a 1 7/8" on our 306..................

richter69 wrote:smallest I ever ran on a BBF was a 2", we run a 1 7/8" on our 306..................

We ran 2 to 2 1/8 w/4" collector an our last sbf nitrous motor. Only run 1 7/8 now but they are turbo headers.

I would think at least 2" on any bbf

1 7/8 on a street driver would be ok,but any BBF w/any kind of power I think would perform better w/2". Smaller tubes make more torque,but thats about all imo.

Bigger isn't always better, it depends on what you are using it for and the rest of the combo.

For a street ride that operates in the 2000-5500 range 1 3/4 or 1 7/8 tubes are fine at those cubic inches and they will work fine on larger engines too.

If your after average power the smaller stuff is the ticket (even on a race car), if your looking only at peak numbers the larger stuff is the way to go, but I will say peak numbers do not mean it is going to run better or go faster.

well i do race the truck 3-4 times a year plus try to make drag week truck has run a best of 11.45 @ 116 on motor but is in 11.60s most the time. would like to pick up a couple tens on motor and the hose.

with the NO2 the 2" stuff would be more ideal and should gain you some power.

But with exhaust on sometimes its not that much.

would uncapping the header or cut out help

uncapping will definetly help, but you'll need to tune for it or its a waste of time.