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Old 08-04-2014, 08:55 AM   #1 (permalink)
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Default MPG Mods?

Im sure there are pieces in various posts, but was surprised to not find one comprised of any relatively easy DIY mods to boost MPG. If there is one somewhere and im missing it please feel free to post up a link.

If not, what do you Insight MPG vets suggest for relatively easy DIY mods?
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Old 08-04-2014, 10:11 AM   #2 (permalink)
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Honda already did the easy mods.
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Old 08-04-2014, 11:26 AM   #3 (permalink)
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Raise the PSI in the tires.

Block off part of the grill.

Lower springs (does this help?).

Body Kit (not sure this helps mpg either).

The best way to raise mpg is alter your driving style.

Last edited by BackStreet; 08-04-2014 at 11:42 AM.
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Old 08-04-2014, 12:32 PM   #4 (permalink)
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Quote:
Originally Posted by samwichse View Post
Honda already did the easy mods.
This is certainly true, but if you want to be radical and get some of the road worthiness compromises circumvented:
1. Tire pressures as high as you are willing. New tires work fine at high psi, with some loss of cornering traction, so use care.
2. Remove right side mirror if legal in your state. Use a convex mirror inside to restore visibility.
3. Block 90% of the front grill openings, assuming you can live w/o A/C. Monitor coolant temp with a good after market gauge. Thermostat is progressive and not fully open until 214F. Anything higher, you gotta remove some grill block.
4. Use a warm air pick-up fall, winter and spring - depending on location.
5. Install a full under belly.
6. Install a FAS switch. Know your terrain so you know where to FAS.
7. Tune the car perfectly.
8. Learn to recognize LB, how to get into it, and how to maintain it. LB is your friend!
9. Only drive in warm weather, or when the car is already warm

As someone else said, most of it is in technique, but mods do help some.


Just returned from a round trip to daughter's house. Some expressway(I'm slow), some gentle hills, some city streets with lights and stop signs. 106.4 MPG for 24 miles RT.
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Last edited by jime; 08-04-2014 at 12:41 PM.
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Old 08-04-2014, 12:43 PM   #5 (permalink)
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Are there instructions on how to install the FAS switch? I dive 550 miles per week for my commute. Its all highway with multiple long down hills. Would also prove useful when approaching a red light.
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Old 08-04-2014, 01:20 PM   #6 (permalink)
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Assuming you have a G2, Not many mods there yet.

Willie
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Old 08-04-2014, 01:41 PM   #7 (permalink)
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Quote:
Originally Posted by Willie Williford View Post
Assuming you have a G2, Not many mods there yet.

Willie
Whoops, didn't notice that

Can't fas a Gen2 - far as I know.

The FAS, or fuel cutoff relay has been discussed many times. Search on those terms and it will certainly show up.
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Old 08-04-2014, 02:08 PM   #8 (permalink)
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Ahh sorry I didnt specify. I have a 2012 Gen2.
I assumed posting in the Gen 2 forums would indicate that.
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Old 08-04-2014, 03:29 PM   #9 (permalink)
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The mobile feed doesn't give any indication what forum you're in.
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2004 Honda Civic Hybrid "Eeyore" @ 49 mpg
-MaxIMA, OBDIIC&C, IMAC&C, Lower grill block

RIP 2000 Insight, 40k miles @ 69.2 mpg
2000 Insight, AKA "The Basket Case" or "The Go Pod" @185k miles @ 63.5 mpg
-IMAC&C, OBDIIC&C, Scott's aero panel, grid charger, cheapo sound system
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Old 08-04-2014, 03:44 PM   #10 (permalink)
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Quick question..

Driving home i tried the "turn the car off" on down hills. I turn it back 1 click to Accessory. One click forward and the car is running again. Almost like from and Auto stop.

Is this a bad practice in Gen2 cars? If it is ok, am i doing it correctly?
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