Speedo Help!

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Jul 10, 2004 | 03:25 PM

1stls1

Thread Starter

Registered User

Joined: Feb 2004

Posts: 648

From: West Palm Beach, FL

Speedo Help!

I had 245/50/16 tires and went to 285/40/17. I used to run at 70mph at 2000rpm, now at 2000rpm I'm doing 67mph. Am I running faster/slower or is my rpm's off? How can I fix it,only w/ a reprogramer?

Jul 10, 2004 | 04:16 PM

Nittanymarine

Registered User

Joined: Mar 2004

Posts: 145

From: State College, PA

I used a Hypertech Power Programmer III. It allows you to adjust for different tire sizes and gear ratios. I think the Predator might do the same thing if Im not mistaken.