"muttsnuts" on the rdlccrazy site did a dyno day last year and documented each upgrade and and increase it gave .evan_calgary wrote:The transfers are the limiting factor on these barrels for flow. Thus why many of the aftermarket barrels can get substantially more power. Optimal transfer sizing. When you start messing with the size of the port windows you will majorly change power characteristics though.
I am on Rory's team when it comes to tuning. Bigger carbs are of no value on a stock motor. Throw on some pods and call it a day. Zeel may be worth some power but I didn't really see it. Of course if you have piles of tuning and dyno time then sure there are gains to be had. Stock carbs can even work on 396 granted they may cut a bit of top end.
zeel gave approx a 5bhp gain on its own (with better curve ,not sure if he fitted a 4 degree key as well).
Just FYI.
Mark