What is this dyno chart saying is wrong? 22RET
10-22-2010, 10:16 PM
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What is this dyno chart saying is wrong? 22RET
Problem: Power has been very poor after the engine was rebuilt. Almost worse on the highway than when it had 212K miles and was bone stock. Mileage dropped from 20 before the rebuild to around 16 after.
1987 turbo 4Runner, AT, 225/75R15s, new motor, TEC turbo, 2.5" exhaust out the back, supposedly a Crane stage II cam (yes, I've seen the threads where folks don't necessarily like it - I didn't choose it).
Cam specs from my invoice (different shop)
From my invoice:
Cam specs Int Exh
Valve lift: .429 .442
Cam lift: .275 .283
Duration (SAE)
Valve lash .012 .012
Centerline 105 105
Spread 110
Timing events @ 0.050
Duration 224 234
Rocker ratio: 1.56
AFR on the right. It's rich, but that's not the primary problem.
All numbers RWHP
1987 turbo 4Runner, AT, 225/75R15s, new motor, TEC turbo, 2.5" exhaust out the back, supposedly a Crane stage II cam (yes, I've seen the threads where folks don't necessarily like it - I didn't choose it).
Cam specs from my invoice (different shop)
From my invoice:
Cam specs Int Exh
Valve lift: .429 .442
Cam lift: .275 .283
Duration (SAE)
Valve lash .012 .012
Centerline 105 105
Spread 110
Timing events @ 0.050
Duration 224 234
Rocker ratio: 1.56
AFR on the right. It's rich, but that's not the primary problem.
All numbers RWHP
Last edited by edeslaur; 10-22-2010 at 10:18 PM.
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