Highest Naturally Aspirated Torque? BBC
10-09-2008, 08:24 PM
#21
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Not always.
Many builds that concentrate on torque from low to midrange power trip over themselves trying to get a good high speed #. On the reverse, many builds that concentrate on too high of an rpm power peak, trip over themselves in the low to midrange power.
Depends on what exactly you are trying to pinpoint here.
Can you tell us more exacts of what you are thinking and what you are trying to achieve and with what ?
Many builds that concentrate on torque from low to midrange power trip over themselves trying to get a good high speed #. On the reverse, many builds that concentrate on too high of an rpm power peak, trip over themselves in the low to midrange power.
Depends on what exactly you are trying to pinpoint here.
Can you tell us more exacts of what you are thinking and what you are trying to achieve and with what ?
10-10-2008, 07:56 AM
#22
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If you were to build a 598 with small port but high flowing heads like AFR 315 cnc and a small cam like a 741, you'd probably end up with about 700hp and 775lbs of torque with out revving high.
10-10-2008, 08:03 PM
#23
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Remember that big ci usually delivers big torque (650-700+ lbs) from 3000-4500 RPM. This torque is what breaks Bravo drives. If you hold ci to the 500 ci range, you can hold the torque to 550-650 lbs and still make 600 HP at 5250...650 HP @ 5500 RPM and 750HP at 6000 RPM....all with under 650 lbs torque. We have a lot of boating hours from 3500-6000 RPM and have never broken an XR style Bravo drive. We also see zero gear wear on the magnets.
If you up add up the total cost of mantaining the drive train you may find the 540+ ci may not be low life cycle cost for the entire drive train.
If you up add up the total cost of mantaining the drive train you may find the 540+ ci may not be low life cycle cost for the entire drive train.
10-10-2008, 08:25 PM
#24
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So if you have a clean sheat what do you build for a modertly preforming 40 v bottom say 70 to 80 mph range . All the torque you can ? Or cut back on trq. and build some hp.Also keep in mind some type of longjevity probibly not allot of rpm. Im runnig TRS and Borg W. trans.
10-11-2008, 09:11 AM
#26
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Here ya go...get you a peek at this dyno printout sheet on a motor I did last Easter. Notice the HP and torque at 5300 rpm. This was done on a single Holley carb. This pic is the motor that made the power.
Last edited by pslonaker; 07-24-2012 at 11:53 AM.
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