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  #1  
Old 15-09-2007, 12:43 PM
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Default Benefits of 2.5" diff back

Just a heads-up for anyone curious...

http://www.rexnet.com.au/forum/index...howtopic=77019

This topic has been discussed occasionally, makes for a more interesting read now that there are some dyno plots to look at (still waiting for that torque graph though!).

Remebering though that this is just one person's experience.

Cheers - Nik
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Old 15-09-2007, 07:49 PM
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with such little power on an inconsistent dyno, the results really mean nothing...
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Old 16-09-2007, 11:59 AM
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I wanted to see the torque graph, but sadly it has not been posted
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Old 17-09-2007, 11:07 AM
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Quote:
Originally Posted by tuna
with such little power on an inconsistent dyno, the results really mean nothing...
Agreed. They should of at least increased their data space by doing a few more runs...
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Old 20-09-2007, 07:03 AM
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Take II....Reducing from 3" to 2.5" at the diff increases the velocity and improves torque. Needs a retune to exploit but good gains can be found for setups under 220-230kwatw.

Take I
Makes perfect sense. Theory is that as the gas cools it contracts, from diff back this causes the gas to slow. Reducing from 3" to 2.5" at the diff keeps the velocity and improves torque. Torque is what wins races, not dyno shoot outs.
Michael South knows his stuff.
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Last edited by maddog; 21-09-2007 at 06:38 AM. Reason: Gas still contracts when is cools!
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Old 20-09-2007, 07:45 AM
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i may have skipped over it, but has any torque results been plotted from a reliable source?
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Old 20-09-2007, 08:13 AM
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If you mean a hub dyno, then no.
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Old 20-09-2007, 08:20 AM
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Oh noes!

I must be onto something good then..



VF34 , 3" China Spec Zorst.
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Old 20-09-2007, 09:13 AM
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dip at 4300, 5000?
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Old 20-09-2007, 09:14 AM
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Quote:
Originally Posted by Intra
Oh noes!

I must be onto something good then..



VF34 , 3" China Spec Zorst.
Must be tuned with a MoTec ey Pete?

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