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How Much Boost????

Old 04-15-2005 | 04:44 PM
  #31  
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Default Re: How Much Boost????

598, 9 to 1, BB2 xtra, .750 solid roller, 276/ [email protected] Procharged, EFI. Ran octane booster above 10lb boost.

Last edited by GPM; 08-05-2007 at 04:42 PM.
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Old 04-15-2005 | 05:49 PM
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Back4More: More details and dyno graph at:

http://www.offshoreonly.com/forums/s...ad.php?t=99521

GPM: Here's what your data looks like. Got to love that centrifugal torque curve all flat and stretched out by the linear boost curve. What about your new data?
Attached Thumbnails How Much Boost????-gpm-598-procharged-graph.jpg  

Last edited by tomcat; 04-15-2005 at 06:47 PM.
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Old 04-15-2005 | 07:08 PM
  #33  
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TC, the new one's top secret.
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Old 04-15-2005 | 07:25 PM
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Oops! Didn't mean to let the cat out of the bag!
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Old 04-15-2005 | 07:36 PM
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Re: How Much Boost????

Originally Posted by tomcat
Oops! Didn't mean to let the cat out of the bag!
The Cat busted out last year, just don't advertise it. It has been a long cold boring winter, a lot of spare time to feed the cat. PS. thanks for the graph.

Last edited by GPM; 04-15-2005 at 07:47 PM.
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Old 04-16-2005 | 09:38 AM
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Default Re: How Much Boost????

598ci
Brodix 3x cnc
775 lift solid cam
Whipple quad rotor with moac inbtercooler
11# boost, 93 oct, 1260hp
15# boost 112oct, 1370hp

Dustin said I probably left 100hp on the table, A/F never got above 11.3, and Brake specific 6.5. maybe to small of carbs 1050's
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Old 04-16-2005 | 10:17 AM
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Default Re: How Much Boost????

I love that Tq curve of the 598!
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Old 04-16-2005 | 09:01 PM
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I'm still waiting to see some dyno sheets on those 1500 hp Whipple motors.

42MTI, wouldn't mind seeing your dyno sheet, it would be nice to compare, see how much more low end torque a Whipple makes, since we're running almost the same combo. Just curious, how many square inch is your intercooler, Procharger uses 648.
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Old 04-16-2005 | 09:10 PM
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Default Re: How Much Boost????

TC, can you plot this one,12 rib blower belt started slipping and the power fell off, but the torque came in nice. I was thinking about trying a cog drive, and see what happens.

Last edited by GPM; 08-05-2007 at 04:42 PM.
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Old 04-17-2005 | 12:13 PM
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GPM: Here you go. New data on the dotted lines. I haven't figured out how to put the boost numbers on the right side of the graph but the highest boost from the first test was 16 psi so you can scale it from there.

What overall blower drive ratios are we looking at with these two tests?
Attached Thumbnails How Much Boost????-gpm-598-procharged-graph.jpg  

Last edited by tomcat; 04-17-2005 at 02:24 PM.
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