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How do you know a converter is right?

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Old Jul 5, 2014 | 02:02 PM
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Default How do you know a converter is right?

How do you know when its close to being right or wrong?

Right now, mine drops 1000 rpms on the 1-2 shift, and 500 rpms from 2-3. Feels pretty good driving around, spools nice. Will hit the dyno rollers next Sat, track right after for some more data.
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Old Jul 5, 2014 | 06:56 PM
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There's a few calculators online for you to figure out converter slip. Trap speed/gear/tire diameter/gear ratio.
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Old Jul 6, 2014 | 01:13 AM
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1000 on the 1-2 and 500 on the 2-3??? What rpms are you shifting at? Typically they are a lot closer than that unless the shift rpm is different.

The "right" converter is different for what combo you are running....I can tell you this, a procharged car will want a way different converter than a turbo car.

Most converter companies will give you acceptable rpm drop and slip numbers as they see fit. Now some companies will not agree on what is perfect. Getting a converter 100% right for a particular set up can be a daunting task as it can almost always be improved.
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Old Jul 6, 2014 | 08:44 AM
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Originally Posted by Blown06
1000 on the 1-2 and 500 on the 2-3??? What rpms are you shifting at? Typically they are a lot closer than that unless the shift rpm is different.

The "right" converter is different for what combo you are running....I can tell you this, a procharged car will want a way different converter than a turbo car.

Most converter companies will give you acceptable rpm drop and slip numbers as they see fit. Now some companies will not agree on what is perfect. Getting a converter 100% right for a particular set up can be a daunting task as it can almost always be improved.

Shifting at 6000 during the 1-2 shift. I will be hitting the chassis dyno on sat for a little more data.
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Old Jul 6, 2014 | 08:49 AM
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mines drops 1000 on both shifts and has 5-6% slippage at the stripe.
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Old Jul 6, 2014 | 06:19 PM
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Originally Posted by samdogmx
mines drops 1000 on both shifts and has 5-6% slippage at the stripe.
What converter/specs? Wondering how you can drop that much rpm on the 2-3 shift when the ratios of the trans are much closer there.
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Old Jul 6, 2014 | 07:07 PM
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I just checked my data log
1-2 from 6500-5750 = 750rpm
2-3 from 6775-5920 = 855rpm

Ron
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