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Old 09-22-2017, 09:55 AM   #9 (permalink)
Neutral is my favorite
Join Date: Aug 2012
Location: Niagara Falls, NY
Posts: 215

The Black Pearl - '03 Mercury Marauder 300A
Team Panther

Land Yacht - '08 Lincoln Navigator L Ultimate
90 day: 15.89 mpg (US)

Tank of Justice III - '97 Ford Crown Victoria HPP
Team Panther
90 day: 22.24 mpg (US)
Thanks: 50
Thanked 57 Times in 48 Posts
The motor I built has developed a knock. F.
Oh well. I'm stuck at a cross-roads now.

Option #1:
Get a junkyard Explorer motor with the aluminum block and PI heads. It has a 30 day warranty on it. Swap them out and go.

Option #2:
My buddy offered up a Teksid (aluminum) block with stock rotating assembly. If I put my PI heads on that with the flat topped pistons, it should be near 12.1:1 compression. That's outstanding, and will require premium gas.

Now, with the second option, will the increased engine efficiency from the higher compression be enough to offset the cost of running premium? I've been using my Google skills and reading up on this, and even from 8:1 to 9:1, the efficiency goes up 5%-6%.
I found a research paper on this, but I forgot where I saw it. Trying to find it now.

-ryan s.
1997 Ford Crown Victoria HPP- "Tank of Justice III" 193k - 578.9 miles on ONE tank
2003 Mercury Marauder- 61k, not so fuel efficient; #1,548 of 11,052
2008 Lincoln Navigator L - 179k (don't ask about mpg)

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