After reading this thread: https://honda-tech.com/zerothread?id=1589896

I want to do some "mods" to help out my MPG. I drive over 100 miles a day and would like to skimp the OPEC's out of a few more of my pennies.

My car is a crap pile and I dont want to dump tons of money into it but would like to help out my MPG a bit.

Ok here are my questions:

Would swapping to MPFI over DPFI help me any?

Would mimi-me-ing my stock 1.5 be worth it?

Rims.... Right now I am running the 13" steelies. Are there any inexpensive rims that would help?

Thanks in advance for helping out a non-tech-kinda-guy.

 

i think your best mpg mod for the money would be to swap in a HF tranny.

 

Do NOT go mpfi, you will burn more gas. Do not minime the head, you will burn more gas.

HF tranny, VX or HF rims (8-10lbs a rim, super light compared to your 20lbs steelie). Tune up and some fuel system cleaners. Run a new fuel filter, spark plugs, cap rotor and plug wires. Don't forget a new air filter. Make sure the O2 is good too.

 

go onto gas saving sites and learn how to drive efficiently.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesrv &raquo;</TD></TR><TR><TD CLASS="quote">Do NOT go mpfi, you will burn more gas. Do not minime the head, you will burn more gas.

HF tranny, VX or HF rims (8-10lbs a rim, super light compared to your 20lbs steelie). Tune up and some fuel system cleaners. Run a new fuel filter, spark plugs, cap rotor and plug wires. Don't forget a new air filter. Make sure the O2 is good too.</TD></TR></TABLE>

actually the mpfi burns less gas,,i would say convert to mpfi use hf ecu and tranny,,get lighter rims like ludesrv said make sure the tire pressure is good...makes sure the engine is running good..make sure the brakes arent sticking at all..most important modification is your right foot..

 

yea i'm in the same boat as you...just that i drive a lil' over 220 miles a day-roundtrip...and my scion XB is very generous on gas(close to 40mpg at times) but just recently i picked up an HF motor+tranny+ECU though...for my DX chassis, all the normal preventive maintenance will be considered among which will be the spark plugs, wires, dizzy stuff, all in all small things here and there will be modified too..i'm trying milk out 50+mpg the specs say 52, but i'm sure the motor's lil' tired and all..but is 60mpg a realistic goal with just the HF motor-tranny-ecu combination?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr.speaker &raquo;</TD></TR><TR><TD CLASS="quote">

actually the mpfi burns less gas,,i would say convert to mpfi use hf ecu and tranny,,get lighter rims like ludesrv said make sure the tire pressure is good...makes sure the engine is running good..make sure the brakes arent sticking at all..most important modification is your right foot..</TD></TR></TABLE>

Really MPFI helps with gas mileage? I was getting better with my D15B2 in dying need of a tune up then my SOHC ZC (that's 5spd, not auto like the D15B2 was) in mint condition. I have to drive a good 35kms to work so I take her easy. Hmm...I got 475 out of the tank this week, the old D15 was getting 500-550...and I used to beat the **** out of it...might of been one of those freak motors for gas mileage haha.

 

From what I understand (and let me tell you I am no motor guy) the mpfi uses the gas more efficiently. I just wasn't sure how much more efficient I should expect.

Right now I get close to 40 mpg usually 38 or 39. I live on a mountain so going up 2000 feet everyday doesn't help much. I have the engine tuned up and check my tire pressures at least once a week.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by andrey320 &raquo;</TD></TR><TR><TD CLASS="quote">go onto gas saving sites and learn how to drive efficiently.</TD></TR></TABLE>

I have. I do most of what they said already.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesrv &raquo;</TD></TR><TR><TD CLASS="quote">Do NOT go mpfi, you will burn more gas. Do not minime the head, you will burn more gas.

HF tranny, VX or HF rims (8-10lbs a rim, super light compared to your 20lbs steelie). Tune up and some fuel system cleaners. Run a new fuel filter, spark plugs, cap rotor and plug wires. Don't forget a new air filter. Make sure the O2 is good too.</TD></TR></TABLE>

I will look for rims.

Thanks everyone for their input. Any other ideas?

 

Hot air intake. The hotter the air, less dense, less power but less gas used.

 

What did the Vx rims come on?

Anyone know where I can get some?

Again thanks

 

civic VX..92-95...

 

the hf motor normally has mpfi. check the classifieds on honda tech or local classifieds like craigslist or something similar for the hx, vx rims

 

Ya, the best bang for the buck is the hf tranny IMO. Then the mpfi swap if you have a dx/std.

 

Is the HF cam different from the DX cam? Maybe down tune the cam for less power, less gas used on HF ecu with HF cam no? Keep the good springs in her tho.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesrv &raquo;</TD></TR><TR><TD CLASS="quote">Is the HF cam different from the DX cam? Maybe down tune the cam for less power, less gas used on HF ecu with HF cam no? Keep the good springs in her tho.</TD></TR></TABLE>

yes it is..the hf cam is even flatter then the dx cam,,and you'll notice it has peak tq at likw 2500rpm..all in the cause to save gas

 

Man...I almost wanna buy a D15 to make a awesome gas saver haha.

 

VX rims - lightweight. Be certain to get LRR tires for an extra boost

HF Tranny - instant savings - cheap to buy

MPFI - one user on my site noticed a HUGE jump in MPG after switching to MPFI. His car was rather innefficient beforehand though. At 40mpg you shouldn't expect to see THAT much of an improvement as you're already efficient.

OBD1 - you can more easily tune and lean out your fuel table

STD Cam - get the cam from a civic STD for a little boost

Visit http://www.gassavers.org for more ideas.

 

VX rims are not 8lbs each though whoever yped that is incorrect

Just swap in a hf tranny and run it as you have it and youll get great gas milage

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by W O T &raquo;</TD></TR><TR><TD CLASS="quote">VX rims are not 8lbs each though whoever yped that is incorrect</TD></TR></TABLE>

You're right... they are 8.75lbs each.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SiMateoAko &raquo;</TD></TR><TR><TD CLASS="quote">

You're right... they are 8.75lbs each.</TD></TR></TABLE>

I have a rim without a tire, I will weigh it just to see what it is. But give me a week or two, I don't feel like going to the shop anytime soon.

 

I have some in the mail right now. They have tires on them. I will weigh they before they go on the car and post it up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaJack &raquo;</TD></TR><TR><TD CLASS="quote">I have some in the mail right now. They have tires on them. I will weigh they before they go on the car and post it up.</TD></TR></TABLE>

Depending onthe tire they'll weight a whole lot. The rims themselves, however, only weigh 8.75lbs.

 

Tire pressure is another big one as well as proper alignemt...

look for areas that may trap air (rear bumper) and make arangments for the air to not trap....


make the car light light light

 

i'm seriously wondering if i should just invest in a D15Z1 with the HF tranny i already have...or just stick to the D15B6-HF motor i got with my tranny-this motor has close to 120k on it....but i wanna ask this again

on this setup:
D15b6
PM8 ECU
HF tranny
DX chassis

is 60mpg a realistic goal?

edit: with small modifications here and there...to milk out as much as possible..


Modified by pr3d at 4:24 PM 6/16/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SloS13 &raquo;</TD></TR><TR><TD CLASS="quote">60mpg? no, not gonna happen. Shoot for high mid-high 40's MAYBE</TD></TR></TABLE>

sorry..i meant with small modifications here and there..to milk out as much as i can...

but even for an HF motor with 120k miles-mild rebuild-..rated at 52mpg, won't yield close to same results?