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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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There are MANY reasons why its short on power and some of them are:
1) Exhaust system design
2) Cam timing
3) Ignition timing
4) Fuel mapping (AFR's)
5) Injectors mis-sized (duty cycles beyond 80%)
6) Internal drag (many causes)
7) Rings not seated (leakdown tests show this)
8) Heads cannot flow sufficient air to support engine
9) Insufficient octane (I see evidence of possible detonation)
This should help get you started on the process.
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