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Old 03-03-2008, 08:48 PM
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Which carbed whipple would you put on a 582" engine. Get a little crazy with the set up and make over 1200HP?
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Old 03-03-2008, 09:19 PM
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Originally Posted by Whipple Charged
Mark @ Precision marine just made a test, 1071, 8.7psi vs. our 305R, same boost, 8.7psi, 100hp. Free power. This was the same manifold, intercooler, timing, air fuel, etc. Just swap, and 100hp. @ 12psi, the 1071 lost hp, but the 305r made even a higher variance, in fact, it was incredible.

Thanks,
Dustin
Free tell AJ that comes to 150$ per 1 HP,

Just saying I want 2 if its free!!!!!
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Old 03-04-2008, 09:47 PM
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Originally Posted by Strip Poker 388
So Mark,all you did is just swap a roots for the 305 Whipple and at the same boost no changes it made 100hp more?

I guess that would because of parasitic drag and efficiency of the blower?

I wonder what the difference between the Superchiller innercooler VS the Whipple innercooler would be?

Rob
Rob, at 8.7psi, it's nearly all parasitic losses. If there was no intercooler, you would see larger difference because of heat, but the IC helps level the heat field a little bit. Still very different temps, which become incredibly different as boost goes higher. This is why we promote low compression ratio's, you can really take full advantage of the screw compressor and run the boost at 12-14psi on pump gas.

As for IC difference, it depends on which cores, there are multiple Superchiller's out there. The new cores are better than the older ones, in fact, night and day.

Dustin
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Old 03-04-2008, 09:48 PM
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Originally Posted by CAL MAN
We will do that test soon and if OSO will let us I will post results.

Mark
Mark,

Seriously, how do you get anything done with all these post? My god, get to work!
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Old 03-04-2008, 09:52 PM
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Originally Posted by jeff1000man
WHat if you had used a 14-71 instead of a 10-71? Would there still be a huge power difference? What about a chiller?
Depends on so many factors, there's a bunch of different rotors, housing designs, clearance issues, etc. so it's nearly impossible to say an exact figure, but it would certainly be close with most 1471's. Again, as boost goes higher, the bigger the difference is. Almost all typical roots SC's lose HP after 12-13psi and the gains from 10-12 are negligible (on gas engines). A bigger sc doesn't always work better because the rotor clearances are greater, giving you increased leakage. You can seal that up with teflon, which does not last on any continious rpm application.

Thanks,
Dustin
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Old 03-04-2008, 09:55 PM
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Originally Posted by AIR TIME
if I wanted to put a 305r on a 509 or 540 is there a single carb ?? I am replacing a 1050 dom soon I hope last one was stolen, and next yr I want to go blown. so is there a carb model for one carb or do you need twins. art
Can be done, not advised. SC's need to breath. For 1000hp in marine applications, you need a minimum of 1600cfm, thats the bare miminum. 1800-2000cfm is prefered. After 1300hp, you need roughly 2400cfm.

Single 1050 can make 900hp because it flows more than 1000cfm, but it's still going to be restrictive.

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Old 03-04-2008, 09:57 PM
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Originally Posted by JRider
What are the dimensions of the 305R??? Is it the same height as a 671/871?
About 1.5" taller than 671/871 and about the length of a 871.

Height could be addressed by machining the bottom of the sc, but one thing we did, that most have not, is that we built a common plenuem area under the SC, giving the air more time and distance to make its turn to the engine. This is where the 1"+ came from.

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Dustin
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Old 03-04-2008, 09:59 PM
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Originally Posted by jeff1000man
Which carbed whipple would you put on a 582" engine. Get a little crazy with the set up and make over 1200HP?
It's not too hard to make 1200+hp. On a carbed 582, then the 305R is the SC, same as AJ's. With good parts, low compression, 12psi will easily make over 1200. Were seeing typically 1250+ with 12psi, hydr. roller camshaft, pump gas.

Thanks,
Dustin
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Old 03-05-2008, 08:51 AM
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Originally Posted by Whipple Charged
Mark,

Seriously, how do you get anything done with all these post? My god, get to work!

Look who's talking Six posts in a row. You're giving Maryland Mark a run for his money.
Talk to you soon, Eddie.

Aj,
Looking good dude. Best of luck with the new combo.
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Old 03-05-2008, 10:30 AM
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Default 40 outlaw 525 whippled

anyone know who did the setup on the 40 outlaw that Randy has at fastboats.com and what speed should that boat hit? thanks, it is one of my considerations for new boat.
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