Hi everyone, I would like to know if anybody here has tried c or d cut imp. and with what results. I looking for top end and launch experiances and what kind of bowl pressures did or want to see. Thanks.
All things being equal, you will loose some holeshot acceleration running a smaller impeller, and generally gain a few mph on the top end.Duane, Want to try a small 400 chevy in the 550 range normaly aspirated. Its a v bottom 18' rogers with a set back pump,I dont know what the weight is but its not family rigged. It has a berkely with a "b" impellar, no inducer. Trying to get an idea. Thanks.
WOT, How much hole shot do youthink you lost and does it pick up in the mid range. Also do you find that you have to load the pump more for the rpm.
what is "all things being equal" supposed to mean? and how do you come to this conclusion if your total experience is with an A impeller???All things being equal, you will loose some holeshot acceleration running a smaller impeller, and generally gain a few mph on the top end.
I ran a BC with about 770 actual hp in a Bahner tunnel with extensive bottom work and a modified intake. If I flat footed it, it just went to the rev limiter. I never took time to sort it out, but there were many things I could have tried, including going to a B impeller. There are others who have a similar setup that can flat foot their deal and never look back. Similar power, similar hull design, etc. My BC was a race prepped stainless and turned 6400-6500. Boat has run 114mph (in 1/4) according to new owner with no changes. One thing I was considering was changing to a slightly smaller nozzle. I was losing at least 3-4 tenths, probably more, on the start.Steelcomp,originaly I was just trying to get peoples experiances of running small impellars. Ive always hear that they wont launch and their not effeciant. As far as the loading questions, I was fishing for info, like does it need to be loaded more, does the volume x rpm make up for any losses, larger nozzle for volume. Just data.