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I supported Toymods
Location: I renounced punctuation
Registered: May 2002
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Re: Does ULP - 5M-E Mix?
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Wed, 05 June 2002 07:24

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I have a 4M with 9.2:1 comp...no pinging on regular ULP. It however is pre Japan ULP so doesn't have the hardened valve seats therefore every third tank is a leaded tank. My point is, no pinging at all, no change in performance that I can detect...all subjective of course.
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