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6.2 whipple new build boost issue

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Old Oct 4, 2023 | 09:02 PM
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Default 6.2 whipple new build boost issue
Guys, just got the truck off the dyno. Totally rebuilt with lt4 bottom end, tsp lt1 stage 1 cam, 3.25 pulley, johnson lifters. 2.9 whipple. Truck made 500hp on the l86 with 3.75 pulley at 6200. Now its makibg 567 on 3.25 pulley. Kicker it makes it at 5200 and falls on its face. What could be the problem. It has factory airbox with whipple intake tube. Could that be the restriction? Tuner said it has plenty of fuel. 18 deg adv. 3 inch dual exhaust no cats thru a magnaflow
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Old Oct 5, 2023 | 05:23 AM
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Take out the air filter and see what happens.
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Old Oct 5, 2023 | 02:39 PM
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Gained 5 whp
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Old Oct 5, 2023 | 09:21 PM
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Maybe a dumb question. Does it have a heat exchanger?
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Old Oct 6, 2023 | 06:39 AM
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Yes. It does. Iat were good. Ended with 18 degrees. No knock. Hope i dont have a broke spring and its floating. Gonna try new plug wires first
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Old Oct 6, 2023 | 08:25 AM
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Originally Posted by Jjblur
Yes. It does. Iat were good. Ended with 18 degrees. No knock. Hope i dont have a broke spring and its floating. Gonna try new plug wires first
Whats the dyno sheet look like? You can usually see valve float
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Old Oct 10, 2023 | 01:29 PM
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