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05-04-2019 | 01:24 AM

#331

plavutka

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Joined: Apr 2016

Posts: 210

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Quote:

Originally Posted by MILD THUNDER

Sea pump? I have no data on this, but I think out of all the accessories, (steering, alternator, circulating pump), the sea pump robs the most power. I thought I remember reading here something like 15-20hp just to turn the sea pump, idk .

Hard to belive. Perhaps 2 hp or less.
P = Q x H x g x 0,4 (Kw)

p.s
Under name Volvo Penta it is a lot of LS3 marine engines. Not wery sttrong, but @ 430 hp made more prop torque like BBC HO.

Last edited by plavutka; 05-04-2019 at 02:21 AM.

05-04-2019 | 02:35 AM

#332

mggdoors

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Joined: Jan 2016

Posts: 493

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From: San Tan Valley AZ

Quote:

Originally Posted by Crude Intentions

sorry for the delay. Offshore internet is being extra ****ty. These are stock GM 502s. They have cams and box stock EQ iron heads. 8.7:1 compression which also contributes to the bsfcs being higher than normal. The plan is for blowers but still scared to pop the bravos. That dyno number is with wet exhaust and not even a set of long tubes like the 525. These cams desperately want longer runners. I’m too poor for that. Lol

for the record I’m a fan of the LS platform and think you made great power for what an LS is. I only take issue with the claim it would make a 525 look like a fool through the whole powerband and I don’t see where you beat the 525 at all. You make peak power a little higher but a fraction of the torque. This is no ball busting on the LS or what power it made just against the claims made.

You also mention there aren’t many LS powered stern drive boats yet claim they’re cheaper and better. If that were the case don’t you think there would be more than 20 of them?

Probably going to get **** for this but I can say from personal experience that the bravo will be fine. I ran bravo on both the sunny and currently on the daytona (same drives even) behind blower motors. Take off nice and dont murder the throttle below 3k. If you think your coming out of the water then get out of the gas. Ive had better luck with bravos then xr any day. And if you do have an issue much cheaper and easier to find parts for. Keep the oil changed( I do it every 10 hours with the engine oil). Might sound excessive but oil is cheaper than mechanical. Last but not least drive shower, preferably wag engineering billet cap. If it breaks it will most likeley be the floor. Easy fix. I have two spare bravos sitting still waiting for failure. Keep in mind mine are behind a cat with 5 blades. Very hard on drives but still ticking. Btw my drives on my daytona are 1994.
Are you running the eq 320? Thats what I ran on the blower motors. Good heads but heaaaavvvvyyy

Last edited by mggdoors; 05-04-2019 at 02:42 AM.

05-04-2019 | 02:37 AM

#333

mggdoors

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Joined: Jan 2016

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From: San Tan Valley AZ

Quote:

Originally Posted by plavutka

Hard to belive. Perhaps 2 hp or less.
P = Q x H x g x 0,4 (Kw)

p.s
Under name Volvo Penta it is a lot of LS3 marine engines. Not wery sttrong, but @ 430 hp made more prop torque like BBC HO.

I havent found but a 4 hp variable on any run. Some of it has to be the pump but not every run is identical either

05-04-2019 | 08:50 AM

#334

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Joined: Nov 2004

Posts: 14,108

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From: On A Dirt Floor

Quote:

Originally Posted by MILD THUNDER

I dont think anyones against him. But if we're talkin shop, lets talk shop. He's made about two dozen claims in this thread, that are simply untrue. Things like his engines are going to run circles around a 525 merc, use way less fuel, his single pattern cam will make more torque than a dual pattern, and so on

I will read from the beginning then. Thus why I asked. Thanks,