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blowing thru converter question

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Old Jan 23, 2011 | 04:54 PM
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Default blowing thru converter question

Here's my dyno, it's a 4000 vigilante converter spec'd for 500 horsepower, I now make a couple hundred more, is this look like the converter is slipping? In the datalog there is over a 800rpm discrepency between rpm and mph. The green line is the boost and you can see as the boost takes off the graph gets all crazy. No wheel spin.
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Old Jan 24, 2011 | 10:00 PM
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anything from the converter manufacturers?
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Old Jan 26, 2011 | 08:17 PM
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Anyone else see this before?

Last edited by mike13; Jan 26, 2011 at 08:29 PM.
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Old Jan 27, 2011 | 07:03 AM
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hmmm that is odd looking. Is it a 60e? was the converter locked during the pull?
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Old Jan 27, 2011 | 08:31 AM
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Originally Posted by ThreeHonks
hmmm that is odd looking. Is it a 60e? was the converter locked during the pull?
Yes 4L60e , no the converter wasn't locked, the converter felt pretty loose on the street and I think the dyno just compounds that. I think the converter flashes to where you see the boost shoot up, as the load on the motor is what would build boost.

It says I made 445rwhp with a 383 (ls1 based) with Patriot heads, 224/228 cam, 80mm turbo at almost 17lbs boost.

Last edited by mike13; Jan 27, 2011 at 08:39 AM.
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