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Old 07-07-2008, 02:50 AM   #1 (permalink)
Not guzzling as much...
 
Join Date: Apr 2008
Location: Willow Grove/Williamsport, PA
Posts: 4
Chevy Blazer-How the he....

I drive a 95 chevy blazer. Nothing terribly special. I'm into the minitruckin scene so most mods it has are custom non-gas-mileage-related mods. I have a 4.3l central port injected V6, with an MSD coil, and a cone style oiled cotton filter on the end of a tube, connected to the stock intake tubes. Like I said, nothing special. I also have the roof rack shaved, and the suspension lowered 3/2. The trans is a standard 4 speed/OD 4L60E.
I decided to see what I can do on a 400 mile round trip. I should first note that the original EPA rating is 16/21mpg (this was 1995). 13 years later on the way from Willow Grove, PA to Williamsport, PA I simply stuck with the speed limit of 65 and ensured my torque converter was engaged during the entire drive (while on the highway at least) I pulled 22.15mpg. On the way home, I gave drafting a shot (while I would say its probably not the smartest thing to do) and pulled 25mpg on route 80, and approximately 23.5 overall. I was pretty surprised about this. Not sure if I can do much better than that, but I'll see what motor work I can do in the future. Likely nothing crazy, maybe some ac delco rapidfire(?) plugs, taylor wires, and a real cold air intake. Any suggestions and comments are appreciated.


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Old 07-07-2008, 10:16 AM   #2 (permalink)
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Join Date: Nov 2007
Location: Hanover, NH
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Vegan Powa! - '91 CRX DX
90 day: 57.2 mpg (US)
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Do you know what kind of revs you were pulling on the highway? For an SUV and the highway the most you can really do is slow down and throw on some aeromods.

Congrats on the good numbers,
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Old 07-07-2008, 11:38 AM   #3 (permalink)
Not guzzling as much...
 
Join Date: Apr 2008
Location: Willow Grove/Williamsport, PA
Posts: 4
At 60 i'm around 1900 rpms and at 65 around 2000. I also put it in neutral when going downhill and drafting, my idle is around 900-1100 rpms (depending if my motor is in closed ro open loop.)
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Old 07-07-2008, 03:08 PM   #4 (permalink)
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Join Date: Jun 2008
Location: California
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I read a forum post somewhere, possibly here, that drafting doesn't have to be done like the Nascar guys do it ... even if you are a safe distance behind a big truck, you get the benefit of the truck "splitting the air" in front of you.

That's what I've been doing and it does seem to give me a couple of extra MPG, while not jeopardizing my feeling of personal safety!
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