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Old 02-07-2013
overkilltm's Avatar
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Location: Layton, UT
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V8 Emissions in Utah...

I really would like to stick a V8 in my 95 ranger. I really would not like to stick a V8 in my ranger and find out I can not register it. I need some help from anyone here that can give me some good advice. I want to but the whole drive train from a '97 Explorer into my late model '95 (it has OBD2).

My story starts with where I live... Utah! More specifically Weber County. Their emissions policy on engine swapping is as follows:
11.0 ENGINE SWITCHING
11.1 All 1990 or newer vehicles which qualify for testing under this section shall
be tested by the Department.
11.2 Vehicles qualifying for testing under this Section shall not be eligible for a
Certificate of Waiver.
11.3 Engine switching shall be allowed only in accordance with E.P.A. policy.
11.4 Vehicles not meeting the requirements of Section 11.0 shall be deemed as
tampered and dealt with in accordance with the tampering provisions of this
Regulation.
11.5 All 1990 and newer vehicles with switched engines shall be verified to meet
E.P.A. requirements by the Department prior to issuance of a Certificate of
Compliance.
11.6 For 1968 to 1989 vehicles, having an engine other than the original engine
and emissions control configuration are deemed as tampered. These vehicles
must meet the HC and CO standards for the Model Year of the vehicle in order to
receive a Certificate of Compliance, and are not eligible for a Certificate of
Waiver, unless they are restored to the original engine and emissions control
configuration or a configuration approved by the Department.
It was looking good so far for me, they followed the EPA for anything newer than '90. That led me to go looking for what the EPA thought of the mater. I contacted Joel Ball from the EPA and asked him what the policy was. He gave me this snippet:


I asked for some clarification and got this:
"You need a reasonable basis for determining that your vehicle will still comply with the emissions standards after you swap the engine. This can be achieved by running the emissions testing on your vehicle at a lab (this would be expensive) or if data exists for similar vehicles that could be the basis."
I figured that the data for the explorer should be the data I need, so I started looking around and found this Site.

Pulling out what looked like the important data I ended up with This text file. Can anyone help me figure out if the new engine will be within range of the old one? Some values are higher and lower, but I am sure there are acceptable ranges which the V8 might fit in. Thank you!
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Last edited by overkilltm; 02-07-2013 at 09:56 PM. Reason: Clarification
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