Bbc blower motor help!
01-24-2019, 10:25 PM
#43
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Ok after reading for hours on oso forums I think I may try the crane 168771 cam what are your guys’ thoughts about it?? 509 dart pro 1 heads 8.2 compression, 871 blower shop blower with intercooler, dominator carbs plan to run 7-8lbs boost, also what kind of power due you think it may make??
01-25-2019, 06:40 AM
#44
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I'm not trying to hijack your thread. I think the motor combo you're putting together is badass. Nothing like a roots carbed bbc. The power, sound, look all exceptional. I'm just speaking from experience that you're most likely going to have drive problems and start factoring that into your budget. You start putting a 100 plus mph prop on that drive and raise the X-dimension to reduce drag and you can't get on plane w/ a 1/4 throttle. Again not being a Debbie Downer here just start thinking about upgraded drive options. This going fast business is expensive!
01-25-2019, 07:52 AM
#45
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I understand that the drive may be an issue later, I am willing to address that as it becomes an issue, currently with the 2.5” below sponsons setup and 30p prop my boat rolls over 1 person or 6 people and a cooler with ease and around 1/4-1/3 throttle just takes longer with more weight. Very minimal blow out just as the nose drops down. Don’t have any intentions of goin higher with the drive, so unless a 32p prop is goin to cause it to blow out a hole bunch more than it does now I don’t see how planing out with more power will be any harder on it than it is now??
01-25-2019, 08:07 AM
#46
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It sounds like your x-dimension is setup very conservative. If you can live w/ a 95mph boat you're good to go. If you want your boat in the 105-110 range you're going to have to raise that propshaft at least two inches. That's when planing get's tough. All trade offs. I couldn't live with a 95mph single engine cat and then I started mashing gears in the Bravo style drive.
01-25-2019, 08:48 AM
#48
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Drag becomes exponentially problematic at higher speeds. You're going leave 10 plus mph on the table w/ your current x-dimension. That may be worth it to save money on the drive setup but it's difficult not to try and maximize top speed performance w/ the style of boat you have. I'm not an expert but I've learned alot over the last five years of ownership of a single engine cat.
01-25-2019, 10:08 AM
#50
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